:root {
  --bg-primary: #050714;
  --bg-secondary: #0a0d1f;
  --bg-card: rgba(13, 17, 38, 0.7);
  --bg-glass: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --border-glow: rgba(139,92,246,0.4);
  --purple: #8b5cf6;
  --purple-light: #a78bfa;
  --cyan: #06b6d4;
  --cyan-light: #67e8f9;
  --pink: #ec4899;
  --green: #10b981;
  --orange: #f97316;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #475569;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-purple: 0 0 40px rgba(139,92,246,0.15);
  --shadow-cyan: 0 0 40px rgba(6,182,212,0.15);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-main: 'Sora', sans-serif;
  --font-mono: 'Space Mono', monospace;
}
[data-theme="light"] {
  --bg-primary: #f8faff;
  --bg-secondary: #eef2ff;
  --bg-card: rgba(255,255,255,0.85);
  --bg-glass: rgba(0,0,0,0.03);
  --border: rgba(0,0,0,0.08);
  --border-glow: rgba(139,92,246,0.3);
  --text: #1e1b4b;
  --text2: #4338ca;
  --text3: #6366f1;
  --shadow-purple: 0 0 40px rgba(139,92,246,0.1);
  --shadow-cyan: 0 0 40px rgba(6,182,212,0.1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  background:var(--bg-primary);
  color:var(--text);
  min-height:100vh;
  overflow-x:hidden;
  transition:background 0.3s, color 0.3s;
}
body::before{
  content:'';position:fixed;inset:0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(139,92,246,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(6,182,212,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 50% 50%, rgba(236,72,153,0.04) 0%, transparent 70%);
  pointer-events:none;z-index:0;
}
[data-theme="light"] body::before{
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(139,92,246,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(6,182,212,0.05) 0%, transparent 60%);
}
body::after{
  content:'';position:fixed;inset:0;
  background-image:
    linear-gradient(rgba(139,92,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,92,246,0.03) 1px, transparent 1px);
  background-size:60px 60px;pointer-events:none;z-index:0;
}
[data-theme="light"] body::after{opacity:0.4}

/* NAVBAR */
#navbar{
  position:sticky;top:0;z-index:1000;
  background:rgba(5,7,20,0.75);
  backdrop-filter:blur(24px) saturate(180%);
  -webkit-backdrop-filter:blur(24px) saturate(180%);
  border-bottom:1px solid var(--border);
  padding:0 2rem;height:72px;
  display:flex;align-items:center;gap:1rem;transition:var(--transition);
}
[data-theme="light"] #navbar{background:rgba(248,250,255,0.82);}
.logo{display:flex;align-items:center;gap:.6rem;cursor:pointer;text-decoration:none;flex-shrink:0;}
.logo-icon{
  width:38px;height:38px;
  background:linear-gradient(135deg,var(--purple),var(--cyan));
  border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;color:#fff;box-shadow:0 0 20px rgba(139,92,246,0.5);
}
.logo-text{
  font-family:var(--font-main);font-weight:800;font-size:1.3rem;
  background:linear-gradient(135deg,var(--purple-light),var(--cyan-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.nav-search{flex:1;max-width:400px;margin:0 auto;position:relative;}
.nav-search i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text3);font-size:.85rem;}
#searchInput{
  width:100%;background:var(--bg-glass);border:1px solid var(--border);
  border-radius:50px;padding:.55rem 1rem .55rem 2.5rem;
  color:var(--text);font-family:var(--font-main);font-size:.88rem;
  outline:none;transition:var(--transition);
}
#searchInput:focus{border-color:var(--purple);box-shadow:0 0 0 3px rgba(139,92,246,0.2);}
#searchInput::placeholder{color:var(--text3);}
#searchDropdown{
  position:absolute;top:calc(100% + 8px);left:0;right:0;z-index:2000;
  background:var(--bg-secondary);
  border:1px solid rgba(139,92,246,.35);
  border-radius:16px;overflow:hidden;
  box-shadow:0 16px 48px rgba(0,0,0,.55), 0 0 0 1px rgba(139,92,246,.1);
  max-height:320px;overflow-y:auto;display:none;
}
[data-theme="light"] #searchDropdown{background:#eef2ff;border-color:rgba(139,92,246,.25);}
.sdrop-header{padding:.4rem 1rem;font-size:.7rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--text3);background:rgba(139,92,246,.06);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.4rem;}
.sdrop-item{display:flex;align-items:center;gap:.85rem;padding:.65rem 1rem;cursor:pointer;transition:background .15s;border-bottom:1px solid var(--border);}
.sdrop-item:last-child{border-bottom:none;}
.sdrop-item:hover,.sdrop-item.sdrop-active{background:rgba(139,92,246,.12);}
.sdrop-icon{width:34px;height:34px;border-radius:9px;flex-shrink:0;background:linear-gradient(135deg,rgba(139,92,246,.15),rgba(6,182,212,.1));display:flex;align-items:center;justify-content:center;font-size:1rem;border:1px solid rgba(139,92,246,.2);}
.sdrop-info{flex:1;min-width:0;}
.sdrop-name{font-weight:600;font-size:.9rem;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sdrop-name strong{color:var(--purple-light);}
.sdrop-meta{font-size:.72rem;color:var(--text3);margin-top:.1rem;}
.sdrop-count{font-family:var(--font-mono);font-size:.68rem;background:rgba(6,182,212,.1);color:var(--cyan-light);border:1px solid rgba(6,182,212,.2);border-radius:50px;padding:.1rem .45rem;flex-shrink:0;}
.sdrop-empty{padding:1.25rem 1rem;text-align:center;color:var(--text3);font-size:.84rem;}
.sdrop-empty i{display:block;font-size:1.5rem;opacity:.3;margin-bottom:.5rem;}
.nav-right{display:flex;align-items:center;gap:.5rem;margin-left:auto;}
.nav-link{color:var(--text2);text-decoration:none;font-size:.88rem;font-weight:500;padding:.45rem .85rem;border-radius:var(--radius-sm);transition:var(--transition);cursor:pointer;border:none;background:none;font-family:var(--font-main);}
.nav-link:hover{color:var(--text);background:var(--bg-glass);}
.admin-badge{background:linear-gradient(135deg,var(--purple),var(--cyan));color:#fff;font-size:.72rem;font-weight:700;padding:.2rem .6rem;border-radius:50px;font-family:var(--font-mono);letter-spacing:.05em;box-shadow:0 0 12px rgba(139,92,246,0.5);flex-shrink:0;cursor:pointer;transition:var(--transition);user-select:none;}
.admin-badge:hover{transform:translateY(-1px);box-shadow:0 0 20px rgba(139,92,246,0.7);}
.btn-nav-admin{background:linear-gradient(135deg,var(--purple),var(--purple-light));color:#fff;border:none;border-radius:50px;padding:.45rem 1.1rem;font-size:.85rem;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font-main);}
.btn-nav-admin:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(139,92,246,0.4);}
.btn-logout{background:rgba(236,72,153,0.15);border:1px solid rgba(236,72,153,0.3);color:var(--pink);border-radius:50px;padding:.4rem .9rem;font-size:.82rem;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font-main);}
.btn-logout:hover{background:rgba(236,72,153,0.25);border-color:var(--pink);}
.theme-btn{width:42px;height:42px;border-radius:50%;background:var(--bg-glass);border:1px solid var(--border);color:var(--text2);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;font-size:1rem;}
.theme-btn:hover{border-color:var(--purple);color:var(--purple);background:rgba(139,92,246,0.1);}

/* PAGE ROUTER */
.page{display:none;position:relative;z-index:1;min-height:calc(100vh - 72px);}
.page.active{display:block;animation:fadeIn .4s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
#page-admin{background:var(--bg-primary);display:none;flex-direction:column;}
#page-admin.active{display:flex;flex-direction:column;animation:fadeIn .4s ease;}
.admin-layout{display:flex;flex:1;height:calc(100vh - 72px);overflow:hidden;}
.admin-sidebar{width:240px;flex-shrink:0;background:rgba(10,13,31,.8);border-right:1px solid var(--border);padding:0;height:calc(100vh - 72px);overflow:hidden;display:flex;flex-direction:column;position:sticky;top:72px;align-self:flex-start;}
.admin-main{flex:1;padding:2rem;max-width:900px;height:calc(100vh - 72px);overflow-y:auto;scrollbar-width:none;}
.admin-main::-webkit-scrollbar{display:none;}

/* HERO */
.hero{padding:5rem 2rem 3rem;text-align:center;position:relative;overflow:hidden;}
.hero-glow{position:absolute;top:0;left:50%;transform:translateX(-50%);width:600px;height:300px;background:radial-gradient(ellipse, rgba(139,92,246,0.15) 0%, transparent 70%);pointer-events:none;}
.hero-tag{display:inline-flex;align-items:center;gap:.5rem;background:rgba(139,92,246,0.12);border:1px solid rgba(139,92,246,0.3);border-radius:50px;padding:.4rem 1rem;font-size:.8rem;font-weight:600;color:var(--purple-light);font-family:var(--font-mono);margin-bottom:1.5rem;letter-spacing:.05em;}
.hero-tag i{font-size:.75rem;}
.hero h1{font-size:clamp(2rem,5vw,3.8rem);font-weight:800;line-height:1.15;margin-bottom:1.25rem;letter-spacing:-0.03em;}
.hero h1 span{background:linear-gradient(135deg,var(--purple-light),var(--cyan-light),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.hero p{color:var(--text2);font-size:1.05rem;max-width:560px;margin:0 auto 2.5rem;line-height:1.7;}
.hero-stats{display:flex;justify-content:center;gap:2.5rem;flex-wrap:nowrap;margin-bottom:2rem;}
.hero-stat{text-align:center;flex-shrink:1;min-width:0;}
.hero-stat-num{font-family:var(--font-mono);font-size:1.6rem;font-weight:700;background:linear-gradient(135deg,var(--purple-light),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.hero-stat-label{font-size:.78rem;color:var(--text3);margin-top:.2rem;white-space:nowrap;}

/* SECTION */
.section{padding:1.5rem 2rem 2.5rem;max-width:1200px;margin:0 auto;}
.section-title{font-size:1.1rem;font-weight:700;margin-bottom:1.25rem;display:flex;align-items:center;gap:.6rem;color:var(--text);}
.section-title::before{content:'';display:block;width:3px;height:1.1em;background:linear-gradient(to bottom,var(--purple),var(--cyan));border-radius:2px;}

/* SEMESTER STRIP */
.sem-strip-outer{position:relative;display:flex;align-items:center;gap:.5rem;}
.sem-strip-viewport{flex:1;overflow:hidden;min-width:0;}
.sem-strip{display:flex;gap:.6rem;transition:transform .35s cubic-bezier(.4,0,.2,1);flex-wrap:nowrap;width:max-content;}
.sem-slider-btn{flex-shrink:0;width:34px;height:34px;border-radius:50%;background:var(--bg-card);border:1px solid var(--border);color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.75rem;z-index:5;transition:all .25s;backdrop-filter:blur(10px);box-shadow:0 2px 12px rgba(0,0,0,.3);}
.sem-slider-btn:hover{border-color:var(--purple);color:var(--purple-light);box-shadow:0 0 16px rgba(139,92,246,.3);}
.sem-slider-btn.hidden{opacity:0;pointer-events:none;width:0;padding:0;border:none;margin:0;overflow:hidden;}
.sem-btn{background:var(--bg-glass);border:1px solid var(--border);border-radius:50px;padding:.5rem 1.2rem;font-size:.85rem;font-weight:600;cursor:pointer;transition:var(--transition);color:var(--text2);font-family:var(--font-main);white-space:nowrap;flex-shrink:0;}
.sem-btn:hover{border-color:var(--purple);color:var(--purple-light);}
.sem-btn.active{background:linear-gradient(135deg,rgba(139,92,246,0.25),rgba(6,182,212,0.15));border-color:var(--purple);color:var(--purple-light);box-shadow:0 0 20px rgba(139,92,246,0.2);}

/* CATEGORY SLIDER */
.cat-slider-outer{position:relative;padding:4px 54px 20px;}
.cat-slider-outer.grid-mode{padding:4px 0 20px;}
.cat-slider-viewport{overflow:hidden;width:100%;padding:8px 3px 10px;margin:-8px -3px -10px;}
.cards-grid{display:flex;gap:1.25rem;transition:transform .4s cubic-bezier(.4,0,.2,1);will-change:transform;}
.cat-slider-outer.grid-mode .cards-grid{flex-wrap:wrap;}
.cat-slider-outer.grid-mode .cat-card{flex:1 1 calc(25% - 1rem);min-width:220px;}
.cat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem 1.75rem;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden;backdrop-filter:blur(12px);flex-shrink:0;}
.cat-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--cc,rgba(139,92,246,.06)) 0%, transparent 60%);transition:var(--transition);opacity:0;}
.cat-card::after{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:conic-gradient(from 0deg, transparent 0deg, var(--cc,rgba(139,92,246,.08)) 60deg, transparent 120deg);animation:spin 8s linear infinite;opacity:0;transition:opacity .4s;}
@keyframes spin{to{transform:rotate(360deg)}}
.cat-card:hover::before{opacity:1;}
.cat-card:hover::after{opacity:1;}
.cat-card:hover{border-color:var(--cc-border,rgba(139,92,246,.5));transform:translateY(-6px);box-shadow:0 20px 60px rgba(0,0,0,.3), 0 0 40px var(--cc-glow,rgba(139,92,246,.15));}
.cc-icon{width:56px;height:56px;border-radius:14px;background:var(--cc-icon-bg,rgba(139,92,246,.12));display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:1.25rem;position:relative;z-index:1;box-shadow:0 0 20px var(--cc-glow,rgba(139,92,246,.2));}
.cc-name{font-size:1.2rem;font-weight:700;margin-bottom:.3rem;position:relative;z-index:1;}
.cc-count{font-size:.8rem;color:var(--text3);position:relative;z-index:1;margin-bottom:1.25rem;}
.cc-arrow{position:relative;z-index:1;display:flex;align-items:center;gap:.5rem;font-size:.82rem;font-weight:600;color:var(--cc-text,var(--purple-light));transition:var(--transition);}
.cc-arrow i{transition:var(--transition);}
.cat-card:hover .cc-arrow i{transform:translateX(4px);}
.cat-slider-btn{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:50%;background:var(--bg-card);border:1px solid var(--border);color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.95rem;z-index:20;transition:all .25s;backdrop-filter:blur(10px);box-shadow:0 4px 20px rgba(0,0,0,.4);}
.cat-slider-btn:hover{border-color:var(--purple);color:var(--purple-light);box-shadow:0 0 24px rgba(139,92,246,.4);}
.cat-slider-btn.hidden{opacity:0;pointer-events:none;}
.cat-slider-btn-prev{left:6px;}
.cat-slider-btn-next{right:6px;}

/* NOTES BY BADGE */
.notes-by-badge{display:inline-flex;align-items:center;gap:.35rem;background:rgba(139,92,246,.1);border:1px solid rgba(139,92,246,.22);border-radius:50px;padding:.15rem .55rem;font-size:.7rem;color:var(--purple-light);font-family:var(--font-mono);white-space:nowrap;max-width:160px;overflow:hidden;text-overflow:ellipsis;flex-shrink:0;}
.notes-by-badge i{font-size:.62rem;opacity:.8;}

/* PAGE HEADER */
.page-header{padding:3rem 2rem 2rem;max-width:1200px;margin:0 auto;display:flex;align-items:flex-start;gap:1.5rem;flex-wrap:wrap;}
.back-btn{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.5rem .9rem;color:var(--text2);cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.5rem;font-size:.85rem;font-family:var(--font-main);flex-shrink:0;}
.back-btn:hover{border-color:var(--purple);color:var(--purple-light);}
.page-title-block{flex:1;}
.breadcrumb{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;font-size:.8rem;color:var(--text3);margin-bottom:.5rem;font-family:var(--font-mono);}
.breadcrumb .crumb{cursor:pointer;transition:var(--transition);}
.breadcrumb .crumb:hover{color:var(--purple-light);}
.breadcrumb .sep{opacity:.4;}
.breadcrumb .active-crumb{color:var(--text2);}
.page-title{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;background:linear-gradient(135deg,var(--purple-light),var(--cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.subject-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;padding:0 2rem 2rem;max-width:1200px;margin:0 auto;}
.subject-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem 1.5rem;cursor:pointer;transition:var(--transition);backdrop-filter:blur(10px);display:flex;align-items:center;gap:1rem;position:relative;overflow:hidden;}
.subject-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(to bottom,var(--purple),var(--cyan));transform:scaleY(0);transition:var(--transition);transform-origin:bottom;}
.subject-card:hover::before{transform:scaleY(1);}
.subject-card:hover{border-color:rgba(139,92,246,.4);transform:translateY(-3px);box-shadow:var(--shadow-purple);}
.subj-icon{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,rgba(139,92,246,.15),rgba(6,182,212,.1));display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--purple-light);flex-shrink:0;border:1px solid rgba(139,92,246,.2);}
.subj-name{font-weight:600;font-size:.95rem;flex:1;}
.subj-count{font-size:.75rem;color:var(--text3);margin-top:.15rem;}
.subj-arrow{color:var(--text3);font-size:.8rem;transition:var(--transition);}
.subject-card:hover .subj-arrow{color:var(--purple-light);transform:translateX(3px);}

/* UNIT PAGE */
.units-container{padding:0 2rem 2rem;max-width:900px;margin:0 auto;}
.unit-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem 1.5rem;margin-bottom:.6rem;display:flex;align-items:center;gap:1rem;transition:var(--transition);backdrop-filter:blur(10px);}
.unit-item:hover{border-color:rgba(139,92,246,.4);background:rgba(139,92,246,.04);transform:translateX(5px);}
.unit-num{font-family:var(--font-mono);font-size:.75rem;color:var(--purple-light);opacity:.6;width:24px;flex-shrink:0;text-align:right;}
.unit-item a{color:var(--text);text-decoration:none;flex:1;font-weight:500;font-size:.95rem;transition:var(--transition);}
.unit-item:hover a{color:var(--purple-light);}
.unit-ext{color:var(--text3);font-size:.75rem;transition:var(--transition);}
.unit-item:hover .unit-ext{color:var(--purple-light);}

/* ═══════════════════════════════════════════════
   PROJECT SLIDER
═══════════════════════════════════════════════ */
.proj-slider-outer{
  position:relative;
  padding:4px 54px 20px;
}
.proj-slider-viewport{
  overflow:hidden;
  width:100%;
  padding:8px 4px 4px;
  margin:-8px -4px -4px;
}
.proj-cards-track{
  display:flex;
  gap:1.25rem;
  transition:transform .4s cubic-bezier(.4,0,.2,1);
  will-change:transform;
}
.project-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  cursor:pointer;
  transition:var(--transition);
  backdrop-filter:blur(12px);
  text-decoration:none;
  display:block;
  position:relative;
  flex-shrink:0;
}
.project-card:hover{
  border-color:rgba(139,92,246,.5);
  transform:translateY(-6px);
  box-shadow:0 20px 60px rgba(0,0,0,.3), 0 0 40px rgba(139,92,246,.15);
}
.project-img-wrap{
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg, rgba(139,92,246,.15), rgba(6,182,212,.1));
  display:flex;align-items:center;justify-content:center;
  position:relative;
}
.project-img-wrap img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.project-card:hover .project-img-wrap img{transform:scale(1.05);}
.project-img-placeholder{font-size:3rem;opacity:.3;}
.project-info{padding:1rem 1.25rem 1.25rem;}
.project-title{
  font-size:.95rem;font-weight:700;
  color:var(--text);margin-bottom:.3rem;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.project-creator{
  font-size:.78rem;color:var(--text3);
  display:flex;align-items:center;gap:.35rem;
}
.project-creator i{color:var(--purple-light);font-size:.7rem;}
.project-link-icon{
  position:absolute;top:.75rem;right:.75rem;
  width:30px;height:30px;border-radius:50%;
  background:rgba(139,92,246,.2);border:1px solid rgba(139,92,246,.3);
  display:flex;align-items:center;justify-content:center;
  color:var(--purple-light);font-size:.75rem;
  opacity:0;transition:var(--transition);
}
.project-card:hover .project-link-icon{opacity:1;}

/* ADMIN PROJECT STYLES */
.project-admin-item{
  display:flex;align-items:center;gap:.75rem;padding:.85rem 1rem;
  border-radius:var(--radius-sm);border:1px solid var(--border);
  margin-bottom:.5rem;background:var(--bg-glass);transition:var(--transition);
}
.project-admin-item:hover{border-color:rgba(139,92,246,.3);}
.project-admin-thumb{
  width:60px;height:34px;border-radius:6px;object-fit:cover;
  background:rgba(139,92,246,.1);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:1rem;
  border:1px solid rgba(139,92,246,.2);overflow:hidden;
}
.project-admin-thumb img{width:100%;height:100%;object-fit:cover;}
.project-admin-info{flex:1;min-width:0;}
.project-admin-title{font-weight:600;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.project-admin-meta{font-size:.74rem;color:var(--text3);margin-top:.1rem;}
.img-preview-wrap{
  width:100%;aspect-ratio:16/9;border-radius:var(--radius-sm);
  background:var(--bg-glass);border:2px dashed var(--border);
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;margin-top:.5rem;transition:var(--transition);
  cursor:pointer;position:relative;
}
/* Mobile banner preview — strict 4:5, centered & max-width so it doesn't sprawl */
.img-preview-wrap--mobile{
  aspect-ratio:4/5 !important;
  height:auto !important;
  max-width:220px;
  align-self:center;
  margin:0 auto;
}
.img-preview-wrap:hover{border-color:var(--purple);}
.img-preview-wrap img{width:100%;height:100%;object-fit:cover;}
.img-preview-placeholder{text-align:center;color:var(--text3);font-size:.85rem;}
.img-preview-placeholder i{font-size:2rem;display:block;margin-bottom:.5rem;opacity:.4;}
/* Force 24-hour format on time inputs — hides AM/PM in supporting browsers */
input[type="time"]::-webkit-calendar-picker-indicator{opacity:.6;}
input[type="time"]{-webkit-appearance:none;appearance:none;}

/* PROJECT EDIT ROW */
.proj-edit-row{
  background:rgba(139,92,246,.06);
  border:1px solid rgba(139,92,246,.25);
  border-radius:var(--radius-sm);
  padding:1rem;margin-bottom:.75rem;display:none;
}
.proj-edit-row.open{display:block;animation:fadeIn .2s ease;}

/* LOGIN MODAL */
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(8px);z-index:2000;align-items:center;justify-content:center;padding:1rem;}
.overlay.open{display:flex;animation:fadeIn .2s ease;}
.modal{background:var(--bg-secondary);border:1px solid rgba(139,92,246,.3);border-radius:24px;padding:2.25rem;width:100%;max-width:440px;position:relative;box-shadow:0 0 80px rgba(139,92,246,.2),0 40px 80px rgba(0,0,0,.5);animation:slideUp .3s ease;}
@keyframes slideUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
[data-theme="light"] .modal{background:#f0f4ff;border-color:rgba(139,92,246,.2);}
.modal-close{position:absolute;top:1.25rem;right:1.25rem;width:34px;height:34px;border-radius:50%;background:var(--bg-glass);border:1px solid var(--border);color:var(--text2);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:var(--transition);}
.modal-close:hover{background:rgba(236,72,153,.2);border-color:var(--pink);color:var(--pink);}
.modal-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1.75rem;}
.modal-icon{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--purple),var(--cyan));display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;box-shadow:0 0 20px rgba(139,92,246,.4);}
.modal-title{font-size:1.3rem;font-weight:700;}
.form-group{margin-bottom:1.1rem;}
.form-label{display:block;font-size:.78rem;font-weight:700;color:var(--text2);margin-bottom:.5rem;letter-spacing:.06em;text-transform:uppercase;font-family:var(--font-mono);}
.form-input,.form-select{width:100%;background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.65rem 1rem;color:var(--text);font-family:var(--font-main);font-size:.9rem;outline:none;transition:var(--transition);}
.form-input:focus,.form-select:focus{border-color:var(--purple);box-shadow:0 0 0 3px rgba(139,92,246,.2);}
.form-select option{background:var(--bg-secondary);color:var(--text);}
.btn-submit{width:100%;background:linear-gradient(135deg,var(--purple),var(--cyan));color:#fff;border:none;border-radius:var(--radius-sm);padding:.85rem;font-family:var(--font-main);font-weight:700;font-size:1rem;cursor:pointer;transition:var(--transition);margin-top:.75rem;letter-spacing:.02em;box-shadow:0 8px 30px rgba(139,92,246,.3);}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(139,92,246,.45);}
.btn-submit:disabled{opacity:.6;cursor:not-allowed;transform:none;}
.alert-success{background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.3);border-radius:var(--radius-sm);padding:.75rem 1rem;color:var(--green);font-size:.88rem;margin-top:1rem;display:none;align-items:center;gap:.5rem;}
.alert-error{background:rgba(236,72,153,.1);border:1px solid rgba(236,72,153,.3);border-radius:var(--radius-sm);padding:.75rem 1rem;color:var(--pink);font-size:.88rem;margin-top:.75rem;display:none;align-items:center;gap:.5rem;}

/* LOADING OVERLAY */
#loadingOverlay{display:flex;position:fixed;inset:0;background:rgba(5,7,20,.85);backdrop-filter:blur(12px);z-index:9998;align-items:center;justify-content:center;flex-direction:column;gap:1rem;}
#loadingOverlay.show{display:flex;}
#loadingOverlay.hidden{display:none;}
.loading-spinner{width:48px;height:48px;border:3px solid rgba(139,92,246,.2);border-top-color:var(--purple);border-radius:50%;animation:spin-loader .8s linear infinite;}
@keyframes spin-loader{to{transform:rotate(360deg)}}
.loading-text{color:var(--text2);font-size:.9rem;font-family:var(--font-mono);}

/* ADMIN DASHBOARD */
.admin-nav-scroll{flex:1;overflow-y:auto;padding:.5rem 0;}
.admin-nav-scroll::-webkit-scrollbar{width:4px;}
.admin-nav-scroll::-webkit-scrollbar-track{background:transparent;}
.admin-nav-scroll::-webkit-scrollbar-thumb{background:rgba(139,92,246,.3);border-radius:2px;}
.admin-nav-scroll::-webkit-scrollbar-thumb:hover{background:var(--purple);}
.admin-sidebar-logo{padding:1.25rem 1.5rem 1rem;font-family:var(--font-mono);font-size:.7rem;color:var(--text3);letter-spacing:.1em;text-transform:uppercase;border-bottom:1px solid var(--border);flex-shrink:0;}
.admin-sidebar-logo span{background:linear-gradient(135deg,var(--purple-light),var(--cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-size:.85rem;font-weight:700;display:block;margin-bottom:.2rem;}
.admin-nav-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.5rem;cursor:pointer;transition:var(--transition);color:var(--text2);font-size:.88rem;font-weight:500;border:none;background:none;width:100%;text-align:left;font-family:var(--font-main);border-left:3px solid transparent;}
.admin-nav-item:hover{color:var(--text);background:var(--bg-glass);}
.admin-nav-item.active{color:var(--purple-light);background:rgba(139,92,246,.1);border-left-color:var(--purple);}
.admin-nav-item i{width:16px;text-align:center;}
.rb-nav-badge{background:rgba(249,115,22,.2);border:1px solid rgba(249,115,22,.4);color:var(--orange);border-radius:50px;font-family:var(--font-mono);font-size:.62rem;padding:.1rem .4rem;margin-left:.3rem;}
.admin-page-title{font-size:1.5rem;font-weight:800;margin-bottom:.4rem;background:linear-gradient(135deg,var(--purple-light),var(--cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.admin-page-sub{color:var(--text3);font-size:.85rem;margin-bottom:2rem;}
.admin-tab{display:none;}
.admin-tab.active{display:block;animation:fadeIn .3s ease;}
.admin-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.25rem;backdrop-filter:blur(10px);}
.admin-card-title{font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--purple-light);font-family:var(--font-mono);margin-bottom:1.25rem;display:flex;align-items:center;gap:.5rem;}
.sem-list-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:var(--radius-sm);border:1px solid var(--border);margin-bottom:.5rem;background:var(--bg-glass);transition:var(--transition);}
.sem-list-item:hover{border-color:rgba(139,92,246,.3);}
/* DRAG & DROP */
.dragging{opacity:0.35;border:2px dashed rgba(139,92,246,.6)!important;background:rgba(139,92,246,.04)!important;transform:scale(0.98);transition:opacity .15s,transform .15s;}
.drag-over{border:2px dashed var(--cyan)!important;background:rgba(6,182,212,.06)!important;transform:translateY(-2px);box-shadow:0 4px 16px rgba(6,182,212,.15)!important;transition:transform .15s,box-shadow .15s;}
.sem-drag{cursor:grab;color:var(--text3);font-size:.85rem;padding:.2rem .35rem;touch-action:none;border-radius:4px;transition:color .15s,background .15s;}
.sem-drag:hover{color:var(--purple-light);background:rgba(139,92,246,.1);}
.sem-drag:active{cursor:grabbing;color:var(--purple);}
.sem-label{flex:1;font-weight:600;font-size:.92rem;}
.sem-badge{font-family:var(--font-mono);font-size:.7rem;background:rgba(139,92,246,.12);border:1px solid rgba(139,92,246,.2);color:var(--purple-light);border-radius:50px;padding:.15rem .55rem;}
.sem-actions{display:flex;gap:.4rem;}
.btn-icon{width:30px;height:30px;border-radius:8px;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);font-size:.78rem;}
.btn-edit{background:rgba(6,182,212,.12);color:var(--cyan);}
.btn-edit:hover{background:rgba(6,182,212,.25);}
.btn-del{background:rgba(236,72,153,.12);color:var(--pink);}
.btn-del:hover{background:rgba(236,72,153,.25);}
.btn-up,.btn-dn{background:rgba(139,92,246,.12);color:var(--purple-light);}
.btn-up:hover,.btn-dn:hover{background:rgba(139,92,246,.25);}
.btn-restore{background:rgba(16,185,129,.12);color:var(--green);}
.btn-restore:hover{background:rgba(16,185,129,.28);}
.btn-perm-del{background:rgba(239,68,68,.12);color:#ef4444;}
.btn-perm-del:hover{background:rgba(239,68,68,.28);}
.res-item{display:flex;align-items:flex-start;gap:.75rem;padding:.8rem 1rem;border-radius:var(--radius-sm);border:1px solid var(--border);margin-bottom:.5rem;background:var(--bg-glass);transition:var(--transition);}
.res-item:hover{border-color:rgba(139,92,246,.3);}
.res-item.selected{border-color:rgba(139,92,246,.6);background:rgba(139,92,246,.08);}
.res-checkbox{width:18px;height:18px;flex-shrink:0;margin-top:.15rem;accent-color:var(--purple);cursor:pointer;}
/* filter ↔ bulk swap */
.filter-bulk-wrap{position:relative;min-height:44px;margin-bottom:1.25rem;}
.filter-bar{display:flex;gap:.6rem;flex-wrap:wrap;margin-bottom:0;transition:opacity .18s ease,transform .18s ease;}
.filter-bar.bar-hidden{opacity:0;pointer-events:none;transform:translateY(-5px);}
.bulk-bar{position:absolute;top:0;left:0;right:0;display:flex;flex-direction:column;opacity:0;pointer-events:none;
  background:rgba(13,17,38,.98);border:1px solid rgba(139,92,246,.5);border-radius:var(--radius-sm);
  backdrop-filter:blur(16px);box-shadow:0 4px 24px rgba(139,92,246,.25);
  transition:opacity .18s ease,transform .18s ease;transform:translateY(5px);z-index:10;}
[data-theme="light"] .bulk-bar{background:rgba(238,242,255,.98);}
.bulk-bar.visible{opacity:1;pointer-events:all;transform:translateY(0);}
.bulk-bar-top{display:flex;align-items:center;gap:.75rem;padding:.65rem 1rem;flex-wrap:wrap;}
.bulk-bar-count{font-size:.85rem;font-weight:700;color:var(--purple-light);font-family:var(--font-mono);white-space:nowrap;}
.bulk-bar-actions{display:flex;gap:.5rem;margin-left:auto;flex-wrap:wrap;}
.bulk-edit-btn{background:rgba(139,92,246,.15);border:1px solid rgba(139,92,246,.35);color:var(--purple-light);border-radius:var(--radius-sm);padding:.4rem .9rem;font-size:.82rem;font-weight:600;cursor:pointer;font-family:var(--font-main);transition:var(--transition);white-space:nowrap;}
.bulk-edit-btn:hover,.bulk-edit-btn.active{background:rgba(139,92,246,.3);border-color:var(--purple);}
.bulk-delete-btn{background:rgba(236,72,153,.12);border:1px solid rgba(236,72,153,.3);color:var(--pink);border-radius:var(--radius-sm);padding:.4rem .9rem;font-size:.82rem;font-weight:600;cursor:pointer;font-family:var(--font-main);transition:var(--transition);white-space:nowrap;}
.bulk-delete-btn:hover{background:rgba(236,72,153,.25);border-color:var(--pink);}
.bulk-cancel{background:var(--bg-glass);border:1px solid var(--border);color:var(--text2);border-radius:var(--radius-sm);padding:.4rem .85rem;font-size:.82rem;cursor:pointer;font-family:var(--font-main);transition:var(--transition);white-space:nowrap;}
.bulk-cancel:hover{border-color:var(--pink);color:var(--pink);}
.bulk-edit-panel{display:none;border-top:1px solid rgba(139,92,246,.2);padding:.65rem 1rem;gap:.6rem;flex-wrap:wrap;align-items:center;background:rgba(139,92,246,.04);}
.bulk-edit-panel.open{display:flex;}
.bulk-edit-panel .form-select{padding:.4rem .8rem;font-size:.82rem;min-width:130px;flex:1;}
.bulk-apply{background:linear-gradient(135deg,var(--purple),var(--cyan));color:#fff;border:none;border-radius:var(--radius-sm);padding:.42rem 1.1rem;font-size:.82rem;font-weight:700;cursor:pointer;transition:var(--transition);font-family:var(--font-main);white-space:nowrap;}
.bulk-apply:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(139,92,246,.4);}
.select-all-row{display:flex;align-items:center;gap:.6rem;padding:.5rem .25rem;margin-bottom:.4rem;}
.select-all-row label{font-size:.82rem;color:var(--text2);cursor:pointer;font-weight:600;user-select:none;}
.res-info{flex:1;min-width:0;}
.res-text{font-weight:600;font-size:.88rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.res-meta{font-size:.74rem;color:var(--text3);margin-top:.15rem;}
.res-url{font-size:.72rem;color:var(--cyan);font-family:var(--font-mono);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:300px;}
.edit-row{background:rgba(139,92,246,.06);border:1px solid rgba(139,92,246,.25);border-radius:var(--radius-sm);padding:1rem;margin-bottom:.75rem;display:none;}
.edit-row.open{display:block;animation:fadeIn .2s ease;}
.edit-row-grid{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;min-width:0;}
.edit-row-grid > *{min-width:0;}
.btn-sm{padding:.4rem .85rem;border-radius:var(--radius-sm);border:none;font-size:.8rem;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font-main);}
.btn-sm-primary{background:var(--purple);color:#fff;}
.btn-sm-primary:hover{background:var(--purple-light);}
.btn-sm-ghost{background:var(--bg-glass);color:var(--text2);border:1px solid var(--border);}
.btn-sm-ghost:hover{border-color:var(--purple);color:var(--purple-light);}
.btn-sm-danger{background:rgba(239,68,68,.15);color:#ef4444;border:1px solid rgba(239,68,68,.3);}
.btn-sm-danger:hover{background:rgba(239,68,68,.3);}
.btn-sm-green{background:rgba(16,185,129,.15);color:var(--green);border:1px solid rgba(16,185,129,.3);}
.btn-sm-green:hover{background:rgba(16,185,129,.3);}
.filter-bar .form-select,.filter-bar .form-input{width:auto;flex:1;min-width:120px;padding:.45rem .85rem;font-size:.82rem;}
.admin-stats{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:2rem;}
.admin-stat-card{flex:1;min-width:120px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem 1.25rem;backdrop-filter:blur(10px);}
.admin-stat-num{font-family:var(--font-mono);font-size:1.6rem;font-weight:700;background:linear-gradient(135deg,var(--purple-light),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.admin-stat-lbl{font-size:.75rem;color:var(--text3);margin-top:.2rem;}

/* RECYCLE BIN */
.rb-item{display:flex;align-items:flex-start;gap:.75rem;padding:.9rem 1rem;border-radius:var(--radius-sm);border:1px solid rgba(249,115,22,.2);margin-bottom:.6rem;background:rgba(249,115,22,.04);transition:var(--transition);position:relative;overflow:hidden;}
.rb-item::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(to bottom,var(--orange),var(--pink));}
.rb-item:hover{border-color:rgba(249,115,22,.4);background:rgba(249,115,22,.07);}
.rb-item-icon{width:36px;height:36px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:1.1rem;background:rgba(249,115,22,.1);border:1px solid rgba(249,115,22,.25);}
.rb-item-info{flex:1;min-width:0;}
.rb-item-name{font-weight:700;font-size:.9rem;color:var(--text);}
.rb-item-meta{font-size:.73rem;color:var(--text3);margin-top:.15rem;}
.rb-item-expires{font-size:.68rem;font-family:var(--font-mono);padding:.15rem .5rem;border-radius:50px;margin-top:.25rem;display:inline-flex;align-items:center;gap:.3rem;}
.rb-item-expires.urgent{background:rgba(239,68,68,.12);color:#ef4444;border:1px solid rgba(239,68,68,.25);}
.rb-item-expires.soon{background:rgba(249,115,22,.12);color:var(--orange);border:1px solid rgba(249,115,22,.25);}
.rb-item-expires.ok{background:rgba(16,185,129,.1);color:var(--green);border:1px solid rgba(16,185,129,.2);}
.rb-actions{display:flex;gap:.4rem;flex-shrink:0;align-items:center;}
.rb-type-badge{font-size:.65rem;font-weight:700;font-family:var(--font-mono);letter-spacing:.05em;padding:.15rem .5rem;border-radius:50px;flex-shrink:0;text-transform:uppercase;}
.rb-type-resource{background:rgba(139,92,246,.12);color:var(--purple-light);border:1px solid rgba(139,92,246,.2);}
.rb-type-subject{background:rgba(6,182,212,.12);color:var(--cyan-light);border:1px solid rgba(6,182,212,.2);}
.rb-type-semester{background:rgba(16,185,129,.12);color:var(--green);border:1px solid rgba(16,185,129,.2);}
.rb-type-category{background:rgba(249,115,22,.12);color:var(--orange);border:1px solid rgba(249,115,22,.2);}
.rb-type-project{background:rgba(236,72,153,.12);color:var(--pink);border:1px solid rgba(236,72,153,.2);}
.rb-header-actions{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;margin-bottom:1.25rem;}
.rb-filter-tabs{display:flex;gap:.4rem;flex-wrap:wrap;margin-bottom:1rem;}
.rb-filter-tab{background:var(--bg-glass);border:1px solid var(--border);border-radius:50px;padding:.3rem .8rem;font-size:.75rem;font-weight:600;cursor:pointer;transition:var(--transition);color:var(--text2);font-family:var(--font-main);}
.rb-filter-tab:hover{border-color:var(--orange);color:var(--orange);}
.rb-filter-tab.active{background:rgba(249,115,22,.15);border-color:var(--orange);color:var(--orange);}
.rb-empty{text-align:center;padding:4rem 1rem;background:rgba(249,115,22,.03);border:1px dashed rgba(249,115,22,.2);border-radius:var(--radius);}
.rb-empty-icon{font-size:3rem;margin-bottom:1rem;opacity:.4;}
.rb-empty p{color:var(--text3);font-size:.9rem;}
.rb-stats-row{display:flex;gap:.75rem;flex-wrap:wrap;margin-bottom:1.25rem;}
.rb-stat{flex:1;min-width:100px;background:var(--bg-glass);border:1px solid rgba(249,115,22,.15);border-radius:var(--radius-sm);padding:.75rem 1rem;text-align:center;}
.rb-stat-num{font-family:var(--font-mono);font-size:1.3rem;font-weight:700;color:var(--orange);}
.rb-stat-lbl{font-size:.7rem;color:var(--text3);margin-top:.15rem;}

/* SAVE BAR */
#saveBar{position:fixed;bottom:-100px;left:0;right:0;z-index:9999;background:rgba(8,10,25,.98);border-top:2px solid var(--purple);backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);padding:1rem 2rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;box-shadow:0 -4px 40px rgba(139,92,246,.35), 0 -1px 0 rgba(139,92,246,.2);transition:bottom 0.35s cubic-bezier(0.34,1.56,0.64,1);}
[data-theme="light"] #saveBar{background:rgba(238,242,255,.98);border-top-color:var(--purple);}
#saveBar.visible{bottom:0;}
.save-bar-msg{display:flex;align-items:center;gap:.75rem;font-size:.9rem;color:var(--text2);}
.save-bar-dot{width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);animation:blink 1.2s infinite;flex-shrink:0;}
@keyframes blink{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.3;transform:scale(0.8)}}
.save-bar-btns{display:flex;gap:.75rem;}
.btn-save{background:linear-gradient(135deg,var(--purple),var(--cyan));color:#fff;border:none;border-radius:var(--radius-sm);padding:.6rem 1.6rem;font-family:var(--font-main);font-weight:700;font-size:.9rem;cursor:pointer;transition:var(--transition);box-shadow:0 4px 20px rgba(139,92,246,.4);display:flex;align-items:center;gap:.5rem;}
.btn-save:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(139,92,246,.6);}
.btn-save:disabled{opacity:.6;cursor:not-allowed;transform:none;}
.btn-discard{background:rgba(236,72,153,.08);border:1px solid rgba(236,72,153,.3);color:var(--pink);border-radius:var(--radius-sm);padding:.6rem 1.2rem;font-family:var(--font-main);font-size:.88rem;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.5rem;}
.btn-discard:hover{background:rgba(236,72,153,.18);border-color:var(--pink);}

/* CUSTOM CONFIRM MODAL */
#confirmOverlay{display:none;position:fixed;inset:0;z-index:10000;background:rgba(0,0,0,0);backdrop-filter:blur(0px);-webkit-backdrop-filter:blur(0px);align-items:center;justify-content:center;padding:1rem;transition:background 0.25s ease, backdrop-filter 0.25s ease;}
#confirmOverlay.open{display:flex;background:rgba(0,0,0,.65);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);animation:cfadeIn .2s ease forwards;}
@keyframes cfadeIn{from{opacity:0}to{opacity:1}}
#confirmBox{background:var(--bg-secondary);border:1px solid rgba(139,92,246,.25);border-radius:20px;padding:2rem;width:100%;max-width:420px;position:relative;box-shadow:0 0 60px rgba(139,92,246,.18), 0 32px 64px rgba(0,0,0,.55);animation:cslideUp .28s cubic-bezier(0.34,1.56,0.64,1) forwards;}
@keyframes cslideUp{from{opacity:0;transform:translateY(28px) scale(0.97)}to{opacity:1;transform:translateY(0) scale(1)}}
[data-theme="light"] #confirmBox{background:#f0f4ff;border-color:rgba(139,92,246,.2);}
.confirm-icon{width:52px;height:52px;border-radius:14px;margin:0 auto 1.25rem;display:flex;align-items:center;justify-content:center;font-size:1.4rem;}
.confirm-icon.warn{background:rgba(236,72,153,.12);color:var(--pink);border:1px solid rgba(236,72,153,.2);}
.confirm-icon.danger{background:rgba(239,68,68,.12);color:#ef4444;border:1px solid rgba(239,68,68,.2);}
.confirm-icon.info{background:rgba(6,182,212,.12);color:var(--cyan);border:1px solid rgba(6,182,212,.2);}
.confirm-title{font-size:1.15rem;font-weight:800;text-align:center;margin-bottom:.5rem;letter-spacing:-.02em;}
.confirm-msg{font-size:.88rem;color:var(--text2);text-align:center;line-height:1.7;margin-bottom:1.75rem;}
.confirm-btns{display:flex;gap:.75rem;justify-content:center;}
.confirm-btn{flex:1;padding:.7rem 1rem;border-radius:var(--radius-sm);border:none;font-family:var(--font-main);font-size:.88rem;font-weight:700;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:.4rem;}
.confirm-btn-cancel{background:var(--bg-glass);color:var(--text2);border:1px solid var(--border);}
.confirm-btn-cancel:hover{border-color:var(--purple);color:var(--purple-light);}
.confirm-btn-danger{background:linear-gradient(135deg,#ef4444,#ec4899);color:#fff;box-shadow:0 4px 16px rgba(239,68,68,.3);}
.confirm-btn-danger:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(239,68,68,.45);}
.confirm-btn-warn{background:linear-gradient(135deg,var(--pink),#f97316);color:#fff;box-shadow:0 4px 16px rgba(236,72,153,.3);}
.confirm-btn-warn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(236,72,153,.45);}
.confirm-btn-green{background:linear-gradient(135deg,var(--green),var(--cyan));color:#fff;box-shadow:0 4px 16px rgba(16,185,129,.3);}
.confirm-btn-green:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(16,185,129,.45);}

/* CATEGORY ADMIN */
.cat-admin-item{display:flex;align-items:center;gap:.75rem;padding:.85rem 1rem;border-radius:var(--radius-sm);border:1px solid var(--border);margin-bottom:.5rem;background:var(--bg-glass);transition:var(--transition);}
.cat-admin-item:hover{border-color:rgba(139,92,246,.3);}
.cat-admin-icon{font-size:1.2rem;flex-shrink:0;}
.cat-admin-label{flex:1;font-weight:600;font-size:.92rem;}
.cat-admin-count{font-family:var(--font-mono);font-size:.7rem;background:rgba(6,182,212,.1);border:1px solid rgba(6,182,212,.2);color:var(--cyan-light);border-radius:50px;padding:.15rem .55rem;}
.color-row{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.6rem;align-items:center;}
.color-swatch{width:24px;height:24px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:var(--transition);flex-shrink:0;}
.color-swatch.sel,.color-swatch:hover{border-color:#fff;transform:scale(1.25);}
.color-wheel-wrap{position:relative;width:34px;height:34px;flex-shrink:0;}
.color-wheel-btn{width:34px;height:34px;border-radius:50%;cursor:pointer;border:2.5px solid rgba(255,255,255,0.7);background:conic-gradient(hsl(0,100%,50%),hsl(30,100%,50%),hsl(60,100%,50%),hsl(90,100%,50%),hsl(120,100%,50%),hsl(150,100%,50%),hsl(180,100%,50%),hsl(210,100%,50%),hsl(240,100%,50%),hsl(270,100%,50%),hsl(300,100%,50%),hsl(330,100%,50%),hsl(360,100%,50%));transition:var(--transition);position:relative;display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,0,0,0.3);}
.color-wheel-btn::after{content:'';position:absolute;inset:0;border-radius:50%;background:radial-gradient(circle at center,rgba(255,255,255,0.85) 0%,rgba(255,255,255,0.3) 35%,rgba(255,255,255,0) 65%);pointer-events:none;z-index:0;}
.color-wheel-btn::before{content:'+';position:relative;z-index:2;font-size:18px;font-weight:800;color:#fff;text-shadow:0 0 4px rgba(0,0,0,0.9), 0 0 10px rgba(0,0,0,0.7);pointer-events:none;line-height:1;letter-spacing:0;}
.color-wheel-btn:hover{border-color:#fff;transform:scale(1.18);box-shadow:0 0 16px rgba(255,255,255,0.55), 0 2px 10px rgba(0,0,0,0.5);}
.color-wheel-input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%;border:none;padding:0;z-index:3;}
.color-wheel-wrap.has-custom .color-wheel-btn{border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,0.45), 0 2px 10px rgba(0,0,0,0.5);}

/* SUBJECT DROPDOWN */
.subject-dropdown{position:absolute;top:calc(100% + 4px);left:0;right:0;z-index:500;background:var(--bg-secondary);border:1px solid rgba(139,92,246,.35);border-radius:var(--radius-sm);overflow:hidden;box-shadow:0 12px 40px rgba(0,0,0,.45), 0 0 0 1px rgba(139,92,246,.1);max-height:260px;overflow-y:auto;}
[data-theme="light"] .subject-dropdown{background:#eef2ff;border-color:rgba(139,92,246,.25);}
.subject-dropdown-item{display:flex;align-items:center;gap:.75rem;padding:.6rem 1rem;cursor:pointer;font-size:.88rem;font-weight:500;transition:background .15s;border-bottom:1px solid var(--border);}
.subject-dropdown-item:last-child{border-bottom:none;}
.subject-dropdown-item:hover,.subject-dropdown-item.active{background:rgba(139,92,246,.12);color:var(--purple-light);}
.subject-dropdown-item .sd-icon{width:28px;height:28px;border-radius:7px;background:rgba(139,92,246,.1);display:flex;align-items:center;justify-content:center;font-size:.9rem;flex-shrink:0;}
.subject-dropdown-item .sd-name{flex:1;}
.subject-dropdown-item .sd-badge{font-family:var(--font-mono);font-size:.65rem;background:rgba(6,182,212,.1);color:var(--cyan-light);border-radius:50px;padding:.1rem .4rem;}
.subject-dropdown-empty{padding:1rem;text-align:center;font-size:.82rem;color:var(--text3);}
.sd-group-header{padding:.35rem .85rem;font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text3);background:rgba(139,92,246,.06);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.35rem;}

/* FOOTER */
.footer-issue{padding:2rem 2.5rem;border-bottom:1px solid var(--border);}
.footer-issue-title{font-family:var(--font-mono);font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--purple-light);margin-bottom:1rem;display:flex;align-items:center;gap:.5rem;}
.footer-issue-wrap{max-width:600px;margin:0 auto;}
/* Step 0 — initial click box */
.fi-trigger{width:100%;background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.85rem 1.25rem;color:var(--text3);font-family:var(--font-main);font-size:.9rem;cursor:pointer;transition:var(--transition);text-align:left;display:flex;align-items:center;gap:.6rem;}
.fi-trigger:hover{border-color:var(--purple);color:var(--text);background:rgba(139,92,246,.06);}
/* Step 1 — type options */
.fi-options{display:none;gap:.75rem;margin-top:.85rem;}
.fi-options.show{display:flex;}
.fi-opt-btn{flex:1;background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem;font-family:var(--font-main);font-weight:600;font-size:.9rem;color:var(--text);cursor:pointer;transition:var(--transition);display:flex;flex-direction:column;align-items:center;gap:.4rem;text-align:center;}
.fi-opt-btn i{font-size:1.4rem;}
.fi-opt-btn:hover{border-color:var(--purple);background:rgba(139,92,246,.1);color:var(--purple-light);}
.fi-opt-btn.selected{border-color:var(--purple);background:rgba(139,92,246,.15);color:var(--purple-light);}
/* Step 2 — form fields */
.fi-fields{display:none;flex-direction:column;gap:.75rem;margin-top:.85rem;}
.fi-fields.show{display:flex;}
.fi-field-group{display:flex;flex-direction:column;gap:.35rem;}
.fi-field-group label{font-size:.72rem;font-weight:700;color:var(--text);letter-spacing:.06em;text-transform:uppercase;font-family:var(--font-mono);}
.fi-input{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.65rem .9rem;color:var(--text);font-family:var(--font-main);font-size:.9rem;outline:none;transition:var(--transition);width:100%;}
.fi-input:focus{border-color:var(--purple);box-shadow:0 0 0 3px rgba(139,92,246,.15);}
.fi-textarea{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.72rem 1rem;color:var(--text);font-family:var(--font-main);font-size:.9rem;resize:none;outline:none;transition:var(--transition);min-height:80px;line-height:1.6;width:100%;}
.fi-textarea:focus{border-color:var(--purple);box-shadow:0 0 0 3px rgba(139,92,246,.15);}
.fi-input::placeholder,.fi-textarea::placeholder{color:var(--text3);}
.fi-actions{display:flex;gap:.6rem;justify-content:flex-end;margin-top:.25rem;}
.fi-back-btn{background:var(--bg-glass);border:1px solid var(--border);color:var(--text2);border-radius:var(--radius-sm);padding:.62rem 1rem;font-family:var(--font-main);font-size:.85rem;font-weight:600;cursor:pointer;transition:var(--transition);}
.fi-back-btn:hover{border-color:var(--purple);color:var(--text);}
.fi-send-btn{background:linear-gradient(135deg,var(--purple),var(--cyan));color:#fff;border:none;border-radius:var(--radius-sm);padding:.65rem 1.4rem;font-family:var(--font-main);font-weight:700;font-size:.88rem;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.45rem;box-shadow:0 4px 16px rgba(139,92,246,.3);}
.fi-send-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(139,92,246,.45);}
.fi-send-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
@media(max-width:600px){.footer-issue{padding:1.5rem 1rem;}.fi-options{flex-direction:column;}.fi-actions{flex-direction:column-reverse;}.fi-back-btn,.fi-send-btn{width:100%;justify-content:center;}}
[data-theme="light"] footer{background:rgba(248,250,255,.7);}
.footer-about{padding:2.5rem 2.5rem 2rem;border-bottom:1px solid var(--border);text-align:center;}
.footer-about-title{font-family:var(--font-mono);font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--purple-light);margin-bottom:.85rem;}
.footer-about-text{color:var(--text2);font-size:.92rem;line-height:1.8;max-width:780px;margin:0 auto;}
.footer-contact-notice{margin-top:1.25rem;color:var(--text3);font-size:.84rem;line-height:1.7;max-width:700px;margin-left:auto;margin-right:auto;padding:.75rem 1rem;border-radius:var(--radius-sm);background:rgba(139,92,246,.06);border:1px solid rgba(139,92,246,.12);}
.footer-contact-notice a{color:var(--purple-light);text-decoration:none;font-weight:600;transition:var(--transition);}
.footer-contact-notice a:hover{color:var(--cyan-light);}
.footer-socials{display:flex;align-items:center;justify-content:center;gap:1rem;padding:1.5rem 2.5rem;border-bottom:1px solid var(--border);flex-wrap:wrap;}
.footer-social-link{display:inline-flex;align-items:center;gap:.55rem;padding:.55rem 1.2rem;border-radius:50px;border:1px solid var(--border);background:var(--bg-glass);color:var(--text2);text-decoration:none;font-size:.85rem;font-weight:600;font-family:var(--font-main);transition:var(--transition);backdrop-filter:blur(8px);white-space:nowrap;}
.footer-social-link i{font-size:1rem;flex-shrink:0;}
.footer-social-link:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.3);}
.footer-social-link.telegram{border-color:rgba(41,182,246,.35);color:#29b6f6;}
.footer-social-link.telegram:hover{background:rgba(41,182,246,.12);border-color:#29b6f6;box-shadow:0 8px 24px rgba(41,182,246,.2);}
.footer-social-link.github{border-color:rgba(240,246,252,.2);color:#e6edf3;}
[data-theme="light"] .footer-social-link.github{border-color:rgba(36,41,47,.25);color:#24292f;}
.footer-social-link.github:hover{background:rgba(240,246,252,.08);border-color:rgba(240,246,252,.5);box-shadow:0 8px 24px rgba(255,255,255,.08);}
[data-theme="light"] .footer-social-link.github:hover{background:rgba(36,41,47,.08);border-color:rgba(36,41,47,.4);}
.footer-social-link.mail{border-color:rgba(234,68,53,.35);color:#ea4335;}
.footer-social-link.mail:hover{background:rgba(234,68,53,.1);border-color:#ea4335;box-shadow:0 8px 24px rgba(234,68,53,.2);}
.footer-bottom{padding:1.4rem 2.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem;}
.footer-copy{color:var(--text2);font-size:.92rem;font-weight:500;}
.footer-by{font-family:var(--font-mono);font-size:.92rem;color:var(--text2);font-weight:500;}
.footer-by .creator-name{font-weight:800;font-size:1rem;color:#a78bfa;letter-spacing:.03em;}

/* EMPTY STATE */
.empty{text-align:center;padding:4rem 1rem;color:var(--text3);}
.empty i{font-size:3rem;opacity:.3;margin-bottom:1rem;display:block;}
.empty p{font-size:.9rem;}

/* ADD RESOURCE FORM */
.add-form-row{display:grid;gap:.75rem;margin-bottom:.75rem;}
.add-form-row.cols-2{grid-template-columns:1fr 1fr;}
.add-form-row.cols-1{grid-template-columns:1fr;}
.add-form-row .form-group{margin-bottom:0;}
.edit-res-grid{display:grid;gap:.6rem;}
.edit-res-grid .form-group{margin-bottom:0;}
.edit-res-row2{grid-template-columns:1fr;}
.edit-res-row3{grid-template-columns:1fr 1fr;}

.particle{position:fixed;border-radius:50%;pointer-events:none;z-index:0;animation:float linear infinite;}
@keyframes float{from{transform:translateY(100vh) scale(0);opacity:0;}10%{opacity:1;}90%{opacity:1;}to{transform:translateY(-100px) scale(1);opacity:0;}}

#fSem, #fCat {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;background-position: right 14px center;padding-right: 2.5rem;
}
::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:var(--bg-primary);}
::-webkit-scrollbar-thumb{background:rgba(139,92,246,.4);border-radius:3px;}
::-webkit-scrollbar-thumb:hover{background:var(--purple);}

@media(max-width:768px){
  #navbar{padding:0 .75rem;gap:.4rem;height:64px;}
  #btnAdminLogin{display:none!important;}
  .admin-badge{display:none!important;}
  #btnLogout{display:none!important;}
  .logo-text{font-size:1.1rem;}
  .logo-icon{width:32px;height:32px;font-size:.95rem;}
  .nav-search{max-width:120px;}
  #searchInput{font-size:.8rem;padding:.45rem .8rem .45rem 2.2rem;}
  .btn-nav-admin{padding:.4rem .7rem;font-size:.75rem;}
  .admin-badge{font-size:.65rem;padding:.18rem .5rem;}
  .btn-logout{padding:.35rem .7rem;font-size:.75rem;}
  .theme-btn{width:36px;height:36px;font-size:.9rem;}
  .hero{padding:3rem 1rem 2rem;}
  .section,.page-header,.subject-grid,.units-container{padding-left:1rem;padding-right:1rem;}
  .nav-link{display:none;}
  .footer-socials{gap:.65rem;padding:1.25rem 1rem;}
  .footer-social-link{padding:.5rem .9rem;font-size:.8rem;}
  .footer-bottom{padding:1rem;flex-direction:column;align-items:center;text-align:center;}
  .admin-sidebar{display:none;}
  .admin-main{padding:1rem;}
  .edit-row-grid{grid-template-columns:1fr;}
  #saveBar{padding:.75rem 1rem;gap:.75rem;}
  .save-bar-msg > div > strong{font-size:.85rem;}
  .save-bar-msg > div > div{display:none;}
  .btn-save{padding:.55rem 1rem;font-size:.82rem;}
  .btn-discard{padding:.5rem .85rem;font-size:.8rem;}

  #searchDropdown{
    position:fixed;top:64px;left:.75rem;right:.75rem;max-height:60vh;z-index:3000;
  }
  .sdrop-item{padding:.75rem 1rem;}
  .sdrop-name{font-size:.85rem;}

  /* MOBILE CATEGORY SLIDER */
  .cat-slider-outer{padding:4px 44px 12px;}
  .cat-slider-outer.grid-mode{padding:4px 44px 12px;}
  .cat-slider-outer.grid-mode .cards-grid{flex-wrap:nowrap;}
  .cat-slider-outer.grid-mode .cat-card{flex:none;min-width:unset;}
  .cat-card{padding:1.5rem 1.25rem;}
  .cc-icon{width:44px;height:44px;font-size:1.25rem;margin-bottom:1rem;}
  .cc-name{font-size:1rem;}
  .cat-slider-btn{width:36px;height:36px;font-size:.8rem;}
  .subject-grid{grid-template-columns:1fr;}

  /* MOBILE PROJECT SLIDER */
  .proj-slider-outer{padding:4px 44px 12px;}
}
@media(max-width:480px){
  .nav-search{max-width:130px;}
  .hero-stats{gap:1rem;}
  .hero-stat-num{font-size:1.1rem;}
  .hero-stat-label{font-size:.65rem;}
  .footer-social-link span{display:none;}
  .footer-social-link{padding:.6rem .75rem;border-radius:50%;}
  .footer-social-link i{font-size:1.1rem;}
}

/* BODY SCROLL LOCK when any overlay is open */
body.modal-open{overflow:hidden;}

/* PRIVACY POLICY MODAL */
.pp-modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem;width:100%;max-width:680px;max-height:85vh;overflow-y:auto;position:relative;animation:cslideUp .25s ease;}
.pp-modal h2{font-size:1.2rem;font-weight:700;color:var(--purple-light);margin-bottom:1.5rem;display:flex;align-items:center;gap:.5rem;}
.pp-modal h3{font-size:.95rem;font-weight:700;color:var(--text);margin:1.25rem 0 .5rem;}
.pp-modal p{font-size:.88rem;color:var(--text2);line-height:1.8;margin-bottom:.75rem;}
.pp-modal ul{font-size:.88rem;color:var(--text2);line-height:1.8;padding-left:1.25rem;margin-bottom:.75rem;}
.pp-modal a{color:var(--purple-light);text-decoration:none;}
.pp-modal a:hover{color:var(--cyan-light);}
.pp-link{background:none;border:none;color:var(--text3);font-size:.82rem;cursor:pointer;font-family:var(--font-main);transition:color .2s;padding:0;text-decoration:underline;}
.pp-link:hover{color:var(--purple-light);}


/* PROGRAM STRIP */
.prog-strip-outer{position:relative;display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem;}
.prog-strip-viewport{flex:1;overflow:hidden;min-width:0;}
.prog-strip{display:flex;gap:.6rem;transition:transform .35s cubic-bezier(.4,0,.2,1);flex-wrap:nowrap;width:max-content;}
.prog-btn{background:var(--bg-glass);border:1px solid var(--border);border-radius:50px;padding:.5rem 1.2rem;font-size:.85rem;font-weight:600;cursor:pointer;transition:var(--transition);color:var(--text2);font-family:var(--font-main);white-space:nowrap;flex-shrink:0;}
.prog-btn:hover{border-color:var(--purple);color:var(--purple-light);}
.prog-btn.active{background:linear-gradient(135deg,rgba(139,92,246,0.25),rgba(6,182,212,0.15));border-color:var(--purple);color:var(--purple-light);box-shadow:0 0 20px rgba(139,92,246,0.2);}
/* VIDEO CARD */
.video-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;cursor:pointer;transition:var(--transition);backdrop-filter:blur(12px);text-decoration:none;display:block;position:relative;flex-shrink:0;}
.video-card:hover{border-color:rgba(139,92,246,.5);transform:translateY(-6px);box-shadow:0 20px 60px rgba(0,0,0,.3), 0 0 40px rgba(139,92,246,.15);}
.video-card:hover .project-img-wrap img{transform:scale(1.05);}
.video-card:hover .project-link-icon{opacity:1;}
.video-card .project-link-icon{background:rgba(139,92,246,.2);border:1px solid rgba(139,92,246,.3);color:var(--purple-light);}
.video-img-placeholder{font-size:3rem;opacity:.3;}
.rb-type-video{background:rgba(6,182,212,.12);color:var(--cyan-light);border:1px solid rgba(6,182,212,.2);}
.rb-type-program{background:rgba(16,185,129,.12);color:var(--green);border:1px solid rgba(16,185,129,.2);}
.rb-type-quiz{background:rgba(249,115,22,.12);color:var(--orange);border:1px solid rgba(249,115,22,.2);}

/* ═══ QUIZ SECTION — HOME PAGE ═══ */
.quiz-slider-outer{
  position:relative;
  padding:4px 54px 20px;
}
.quiz-slider-viewport{
  overflow:hidden;
  width:100%;
  padding:8px 4px 4px;
  margin:-8px -4px -4px;
}
.quiz-cards-track{
  display:flex;
  gap:1.25rem;
  transition:transform .4s cubic-bezier(.4,0,.2,1);
  will-change:transform;
}
.quiz-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:1.25rem 1.4rem;
  transition:var(--transition);
  backdrop-filter:blur(12px);
  display:flex;
  align-items:center;
  gap:1rem;
  text-decoration:none;
  position:relative;
  overflow:hidden;
  flex-shrink:0;
}
.quiz-card::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(to bottom,var(--purple),var(--cyan));
  transform:scaleY(0);transition:var(--transition);transform-origin:bottom;
}
.quiz-card:hover::before{transform:scaleY(1);}
.quiz-card:hover{
  border-color:rgba(139,92,246,.45);
  transform:translateY(-3px);
  box-shadow:var(--shadow-purple);
}
.quiz-icon{
  width:48px;height:48px;border-radius:12px;
  background:linear-gradient(135deg,rgba(139,92,246,.15),rgba(6,182,212,.1));
  border:1px solid rgba(139,92,246,.25);
  display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;flex-shrink:0;
  box-shadow:0 0 18px rgba(139,92,246,.18);
  transition:var(--transition);
}
.quiz-card:hover .quiz-icon{box-shadow:0 0 24px rgba(139,92,246,.35);transform:scale(1.06);}
.quiz-body{flex:1;min-width:0;}
.quiz-title{
  font-weight:700;font-size:.92rem;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;line-height:1.4;margin-bottom:.3rem;
}
.quiz-creator{
  font-size:.73rem;color:var(--text3);
  display:flex;align-items:center;gap:.32rem;margin-bottom:.7rem;
}
.quiz-creator i{color:var(--purple-light);font-size:.65rem;}
.quiz-start-btn{
  display:inline-flex;align-items:center;gap:.4rem;
  background:linear-gradient(135deg,var(--purple),var(--cyan));
  color:#fff;border:none;border-radius:50px;
  padding:.35rem .9rem;font-size:.78rem;font-weight:700;
  font-family:var(--font-main);cursor:pointer;
  box-shadow:0 4px 14px rgba(139,92,246,.3);
  transition:var(--transition);text-decoration:none;
  white-space:nowrap;
}
.quiz-start-btn:hover{box-shadow:0 6px 20px rgba(139,92,246,.5);transform:translateY(-1px);}
.quiz-start-btn i{font-size:.72rem;}

/* QUIZ ADMIN */
.quiz-admin-item{
  display:flex;align-items:center;gap:.75rem;padding:.85rem 1rem;
  border-radius:var(--radius-sm);border:1px solid var(--border);
  margin-bottom:.5rem;background:var(--bg-glass);transition:var(--transition);
}
.quiz-admin-item:hover{border-color:rgba(139,92,246,.3);}
.quiz-admin-icon{
  width:40px;height:40px;border-radius:10px;
  background:linear-gradient(135deg,rgba(139,92,246,.15),rgba(6,182,212,.1));
  border:1px solid rgba(139,92,246,.2);
  display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;flex-shrink:0;
}
.quiz-admin-info{flex:1;min-width:0;}
.quiz-admin-title{font-weight:600;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.quiz-admin-meta{font-size:.74rem;color:var(--text3);margin-top:.1rem;}
.quiz-edit-row{
  background:rgba(139,92,246,.05);
  border:1px solid rgba(139,92,246,.22);
  border-radius:var(--radius-sm);
  padding:1rem;margin-bottom:.75rem;display:none;
}
.quiz-edit-row.open{display:block;animation:fadeIn .2s ease;}

@media(max-width:768px){
  /* MOBILE QUIZ SLIDER */
  .quiz-slider-outer{padding:4px 44px 12px;}
}

/* ═══════════════════════════════════════════════════════════════
   REMINDER OVERLAY  ← NEW
   Full-screen glassmorphism announcement overlay.
   Triggered by script.js after loading, shown once per day
   (localStorage gating) if an active reminder exists.
════════════════════════════════════════════════════════════════ */

/* ── Backdrop ─────────────────────────────────────────────── */
.reminder-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(5, 7, 20, 0.82);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  animation: reminderFadeIn .45s cubic-bezier(.4,0,.2,1) forwards;
}
@keyframes reminderFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Close button (top-right fixed) ──────────────────────── */
/* Reminder title */
.reminder-title-wrap{
  padding:.7rem 1.4rem .1rem;
  text-align:center;
}
.reminder-title-text{
  font-size:1.15rem;
  font-weight:700;
  color:var(--text1, #e2e8f0);
  letter-spacing:.01em;
  line-height:1.3;
}

.reminder-close {
  position: fixed;
  top: 1.1rem;
  right: 1.1rem;
  z-index: 10001;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  color: #e2e8f0;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s, border-color .2s, transform .2s;
  backdrop-filter: blur(8px);
}
.reminder-close:hover {
  background: rgba(236,72,153,.25);
  border-color: rgba(236,72,153,.5);
  transform: scale(1.1);
}

/* ── Content card ─────────────────────────────────────────── */
.reminder-card {
  background: rgba(13, 17, 38, 0.72);
  border: 1px solid rgba(139,92,246,.35);
  border-radius: 20px;
  overflow: hidden;
  max-width: 740px;
  width: 100%;
  box-shadow:
    0 0 0 1px rgba(139,92,246,.12),
    0 32px 80px rgba(0,0,0,.6),
    0 0 60px rgba(139,92,246,.12);
  animation: reminderZoomIn .45s cubic-bezier(.4,0,.2,1) forwards;
  position: relative;
  z-index: 10000;
}
@keyframes reminderZoomIn {
  from { opacity: 0; transform: scale(.96) translateY(12px); }
  to   { opacity: 1; transform: scale(1)  translateY(0); }
}

/* ── Banner image ─────────────────────────────────────────── */
.reminder-img-wrap {
  width: 100%;
  /* Desktop ratio 16:9 */
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: rgba(139,92,246,.06);
  display: flex;
  align-items: center;
  justify-content: center;
}
.reminder-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── Countdown timer ──────────────────────────────────────── */
.reminder-timer-wrap {
  padding: .9rem 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
  background: rgba(5,7,20,.4);
  border-top: 1px solid rgba(139,92,246,.18);
}
.reminder-timer {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.rt-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .1rem;
  min-width: 52px;
}
.rt-num {
  font-family: 'Space Mono', monospace;
  font-size: 1.65rem;
  font-weight: 700;
  color: #e2e8f0;
  line-height: 1;
  transition: color .3s;
}
.rt-label {
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #475569;
}
.rt-sep {
  font-family: 'Space Mono', monospace;
  font-size: 1.4rem;
  color: rgba(139,92,246,.5);
  line-height: 1;
  margin-bottom: .8rem;
}
/* Urgent state (≤ 1 day remaining) — nums turn red */
.reminder-timer.urgent .rt-num {
  color: #f87171;
  text-shadow: 0 0 14px rgba(248,113,113,.45);
}
.reminder-timer-label {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: #475569;
}

/* ── Mobile — switch to 4:5 ratio ─────────────────────────── */
@media (max-width: 600px) {
  .reminder-card {
    max-width: 360px;
    border-radius: 16px;
  }
  .reminder-img-wrap {
    /* Mobile ratio 4:5 */
    aspect-ratio: 4 / 5;
  }
  .rt-num  { font-size: 1.25rem; }
  .rt-block { min-width: 40px; }
  .rt-sep  { font-size: 1.1rem; }
  .reminder-timer-wrap { padding: .75rem 1rem .85rem; }
}

/* ── Reminder admin list item ─────────────────────────────── */
.reminder-admin-item {
  display: flex;
  align-items: flex-start;
  gap: .85rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: .6rem;
  background: var(--bg-glass);
  transition: border-color .2s;
  flex-wrap: wrap;
}
.reminder-admin-item:hover { border-color: rgba(139,92,246,.3); }
.reminder-admin-thumb {
  width: 80px;
  height: 45px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(139,92,246,.08);
  border: 1px solid rgba(139,92,246,.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: rgba(139,92,246,.4);
}
.reminder-admin-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.reminder-admin-info { flex: 1; min-width: 160px; }
.reminder-admin-status {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  border-radius: 50px;
  padding: .15rem .55rem;
  font-family: var(--font-mono);
  margin-bottom: .3rem;
}
.reminder-status-active   { background: rgba(16,185,129,.15); color: #10b981; border: 1px solid rgba(16,185,129,.3); }
.reminder-status-scheduled { background: rgba(6,182,212,.12);  color: #06b6d4; border: 1px solid rgba(6,182,212,.25); }
.reminder-status-ended    { background: rgba(71,85,105,.15);   color: #64748b; border: 1px solid rgba(71,85,105,.25); }
.reminder-status-pending  { background: rgba(249,115,22,.12);  color: #f97316; border: 1px solid rgba(249,115,22,.25); }
.reminder-admin-dates {
  font-size: .75rem;
  color: var(--text3);
  line-height: 1.6;
}
.reminder-admin-actions {
  display: flex;
  gap: .4rem;
  align-items: center;
  flex-shrink: 0;
  margin-left: auto;
}

input[type="datetime-local"] {
  -webkit-appearance: none;
}

/* ═══════════════════════════════════════════════
   SKELETON LOADING
   Paste this at the end of style.css
═══════════════════════════════════════════════ */

/* Shimmer animation keyframe */
@keyframes skeletonShimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

/* Pulse class — add to every skeleton element */
.skeleton-pulse {
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.10) 50%,
    rgba(255,255,255,0.04) 75%
  );
  background-size: 800px 100%;
  animation: skeletonShimmer 1.4s infinite linear;
  border-radius: 8px;
}

/* Skeleton card — matches real card dimensions */
.skeleton-card {
  pointer-events: none;
  cursor: default;
}

/* Skeleton image placeholder */
.skeleton-img {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 10px;
  margin-bottom: 10px;
  min-height: 140px;
}

/* Skeleton text line placeholders */
.skeleton-line {
  display: block;
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.10) 50%,
    rgba(255,255,255,0.04) 75%
  );
  background-size: 800px 100%;
  animation: skeletonShimmer 1.4s infinite linear;
}

/* Smooth fade-in when real image loads */
.fade-in {
  animation: fadeInImg 0.4s ease;
}

@keyframes fadeInImg {
  from { opacity: 0; transform: scale(0.98); }
  to   { opacity: 1; transform: scale(1); }
}

/* ═══════════════════════════════════════════════
   IMAGE TOGGLE TABS (file upload / URL switch)
═══════════════════════════════════════════════ */
.img-toggle-tabs {
  display: flex;
  gap: .4rem;
  margin-bottom: .5rem;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .25rem;
  width: fit-content;
}
.img-toggle-tab {
  background: none;
  border: none;
  border-radius: 7px;
  padding: .35rem .85rem;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text3);
  font-family: var(--font-main);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: .35rem;
}
.img-toggle-tab:hover {
  color: var(--text2);
  background: rgba(139,92,246,.08);
}
.img-toggle-tab.active {
  background: linear-gradient(135deg, rgba(139,92,246,.25), rgba(6,182,212,.15));
  color: var(--purple-light);
  box-shadow: 0 0 12px rgba(139,92,246,.15);
}
.img-toggle-tab i {
  font-size: .72rem;
}

/* ═══════════════════════════════════════════════
   IMAGE PREVIEW CROSS BUTTON
═══════════════════════════════════════════════ */
.img-preview-clear {
  position: absolute;
  top: .5rem;
  right: .5rem;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(5,7,20,.75);
  border: 1px solid rgba(236,72,153,.4);
  color: var(--pink);
  font-size: .72rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  backdrop-filter: blur(6px);
  z-index: 10;
  line-height: 1;
}
.img-preview-clear:hover {
  background: rgba(236,72,153,.3);
  border-color: var(--pink);
  transform: scale(1.1);
}

/* ── URL Preview Card ───────────────────────────────────────── */
.url-preview-card {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-top: .5rem;
  padding: .55rem .75rem;
  background: rgba(6,182,212,.06);
  border: 1px solid rgba(6,182,212,.2);
  border-radius: var(--radius-sm);
  font-size: .82rem;
  color: var(--cyan-light);
  word-break: break-all;
}
.url-preview-card i {
  flex-shrink: 0;
  opacity: .7;
  font-size: .85rem;
}
.url-preview-card span {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text2);
}