/* =============================================
   DZ-Edu - الموقع التعليمي الجزائري
   تصميم احترافي مستوحى من dzexams.com
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;500;600;700;800;900&family=Tajawal:wght@300;400;500;700;800;900&display=swap');

/* ============ CSS Variables ============ */
:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --secondary: #0f3460;
  --accent: #e94560;
  --accent-gold: #c9a227;
  --accent-gold-light: #f0d060;
  --accent-purple: #7b2ff7;
  --accent-blue: #00b4d8;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-dark: #1a1a2e;
  --bg-dark: #0d0d1a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #232345;
  --bg-input: #2a2a4a;
  --border-color: #2a2a4a;
  --gradient-gold: linear-gradient(135deg, #c9a227 0%, #f0d060 50%, #c9a227 100%);
  --gradient-primary: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --gradient-accent: linear-gradient(135deg, #7b2ff7 0%, #00b4d8 100%);
  --gradient-hero: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 30%, #16213e 60%, #0f3460 100%);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-gold: 0 4px 20px rgba(201,162,39,0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-primary: 'Cairo', 'Tajawal', sans-serif;
}

/* ============ Light Mode ============ */
[data-theme="light"] {
  --primary: #f8f9fa;
  --primary-light: #e9ecef;
  --bg-dark: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f5;
  --bg-input: #e9ecef;
  --text-primary: #1a1a2e;
  --text-secondary: #495057;
  --border-color: #dee2e6;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.15);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* ============ Reset & Base ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font-primary);
  background:var(--bg-dark);
  color:var(--text-primary);
  direction:rtl;
  text-align:right;
  line-height:1.7;
  overflow-x:hidden;
  min-height:100vh;
}
a{text-decoration:none;color:inherit;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:inherit;border:none;outline:none}
input,textarea,select{font-family:inherit;outline:none;border:none}
ul{list-style:none}

/* ============ Scrollbar ============ */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg-dark)}
::-webkit-scrollbar-thumb{background:var(--accent-gold);border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:var(--accent-gold-light)}

/* ============ Utility Classes ============ */
.container{max-width:1300px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{
  font-size:2rem;
  font-weight:800;
  text-align:center;
  margin-bottom:40px;
  position:relative;
}
.section-title::after{
  content:'';
  display:block;
  width:80px;
  height:4px;
  background:var(--gradient-gold);
  margin:12px auto 0;
  border-radius:2px;
}
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 24px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:0.95rem;
  transition:var(--transition);
  cursor:pointer;
}
.btn-gold{
  background:var(--gradient-gold);
  color:#1a1a2e;
  box-shadow:var(--shadow-gold);
}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(201,162,39,0.5)}
.btn-outline{
  background:transparent;
  border:2px solid var(--accent-gold);
  color:var(--accent-gold);
}
.btn-outline:hover{background:var(--accent-gold);color:#1a1a2e}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{opacity:0.9;transform:translateY(-2px)}
.btn-sm{padding:6px 16px;font-size:0.85rem}
.btn-icon{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--bg-input);
  color:var(--text-primary);
  transition:var(--transition);
}
.btn-icon:hover{background:var(--accent-gold);color:#1a1a2e}
.badge{
  display:inline-block;
  padding:4px 12px;
  border-radius:20px;
  font-size:0.75rem;
  font-weight:600;
}
.badge-gold{background:rgba(201,162,39,0.15);color:var(--accent-gold)}
.badge-blue{background:rgba(0,180,216,0.15);color:var(--accent-blue)}
.badge-purple{background:rgba(123,47,247,0.15);color:var(--accent-purple)}

/* ============ Animations ============ */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(30px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes fadeInDown{
  from{opacity:0;transform:translateY(-20px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes fadeIn{
  from{opacity:0}
  to{opacity:1}
}
@keyframes slideInRight{
  from{opacity:0;transform:translateX(30px)}
  to{opacity:1;transform:translateX(0)}
}
@keyframes float{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-10px)}
}
@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:0.7}
}
@keyframes shimmer{
  0%{background-position:-200% 0}
  100%{background-position:200% 0}
}
@keyframes countUp{
  from{opacity:0;transform:scale(0.5)}
  to{opacity:1;transform:scale(1)}
}
@keyframes glow{
  0%,100%{box-shadow:0 0 5px rgba(201,162,39,0.3)}
  50%{box-shadow:0 0 20px rgba(201,162,39,0.6)}
}
.animate-on-scroll{opacity:0;transform:translateY(30px);transition:all 0.6s ease}
.animate-on-scroll.visible{opacity:1;transform:translateY(0)}

/* ============ TOP BAR ============ */
.top-bar{
  background:var(--primary);
  border-bottom:1px solid var(--border-color);
  padding:8px 0;
  font-size:0.85rem;
  color:var(--text-secondary);
}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.top-bar a{color:var(--text-secondary);transition:var(--transition)}
.top-bar a:hover{color:var(--accent-gold)}
.top-bar-links{display:flex;gap:20px;align-items:center}
.top-bar-links a{display:flex;align-items:center;gap:5px}

/* ============ NAVBAR ============ */
.navbar{
  background:rgba(26,26,46,0.95);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  position:sticky;
  top:0;
  z-index:1000;
  border-bottom:1px solid var(--border-color);
  transition:var(--transition);
}
.navbar.scrolled{
  background:rgba(13,13,26,0.98);
  box-shadow:var(--shadow-md);
}
[data-theme="light"] .navbar{
  background:rgba(255,255,255,0.95);
}
[data-theme="light"] .navbar.scrolled{
  background:rgba(255,255,255,0.98);
}
.navbar .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:12px;
  padding-bottom:12px;
}
.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:900}
.logo-icon{
  width:45px;height:45px;
  background:var(--gradient-gold);
  border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;
  font-size:1.3rem;color:#1a1a2e;font-weight:900;
}
.logo-text span{color:var(--accent-gold)}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-link{
  padding:8px 16px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:0.92rem;
  transition:var(--transition);
  position:relative;
  color:var(--text-secondary);
}
.nav-link:hover,.nav-link.active{color:var(--accent-gold);background:rgba(201,162,39,0.1)}
.nav-actions{display:flex;align-items:center;gap:10px}

/* Mega Dropdown */
.dropdown{position:relative}
.dropdown-trigger{cursor:pointer;display:flex;align-items:center;gap:5px}
.dropdown-trigger .arrow{
  font-size:0.7rem;
  transition:var(--transition);
}
.dropdown:hover .arrow{transform:rotate(180deg)}
/* Mega Dropdown Core Styles */
.mega-dropdown{
  position:absolute;
  top:100%;
  right:0;
  width:600px;
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-lg);
  padding:20px;
  visibility:hidden;
  opacity:0;
  transform:translateY(15px);
  transition:var(--transition);
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
  z-index:1000;
  cursor:default;
}
.dropdown:hover .mega-dropdown{
  visibility:visible;
  opacity:1;
  transform:translateY(0);
}
.mega-column-title{
  font-weight:800;
  font-size:1.05rem;
  color:var(--accent-gold);
  margin-bottom:12px;
  padding-bottom:8px;
  border-bottom:1px solid var(--border-color);
  display:flex;
  align-items:center;
  gap:8px;
}
.mega-links{display:flex;flex-direction:column;gap:5px}
.mega-link{
  padding:6px 10px;
  border-radius:var(--radius-sm);
  color:var(--text-secondary);
  font-size:0.9rem;
  transition:var(--transition);
  display:block;
}
.mega-link:hover{
  background:rgba(201,162,39,0.1);
  color:var(--accent-gold);
  padding-right:15px;
}

/* Mobile Menu */
.mobile-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  cursor:pointer;
  padding:5px;
}
.mobile-toggle span{
  width:28px;height:3px;
  background:var(--text-primary);
  border-radius:3px;
  transition:var(--transition);
}
.mobile-menu{
  display:none;
  position:fixed;
  top:0;right:0;
  width:300px;height:100vh;
  background:var(--bg-card);
  z-index:2000;
  padding:20px;
  overflow-y:auto;
  transform:translateX(100%);
  transition:var(--transition);
  box-shadow:var(--shadow-lg);
}
.mobile-menu.active{transform:translateX(0)}
.mobile-overlay{
  display:none;
  position:fixed;
  top:0;left:0;right:0;bottom:0;
  background:rgba(0,0,0,0.5);
  z-index:1999;
}
.mobile-overlay.active{display:block}
.mobile-menu-header{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:20px;padding-bottom:15px;
  border-bottom:1px solid var(--border-color);
}
.mobile-close{
  font-size:1.5rem;cursor:pointer;
  background:var(--bg-input);
  width:36px;height:36px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
}
.mobile-nav-link{
  display:block;padding:12px 16px;
  border-radius:var(--radius-sm);
  font-weight:600;font-size:0.95rem;
  color:var(--text-secondary);
  transition:var(--transition);
  margin-bottom:4px;
}
.mobile-nav-link:hover{background:rgba(201,162,39,0.1);color:var(--accent-gold)}
.mobile-dropdown-title{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 16px;cursor:pointer;
  font-weight:700;color:var(--accent-gold);
  border-radius:var(--radius-sm);
}
.mobile-dropdown-title:hover{background:rgba(201,162,39,0.1)}
.mobile-dropdown-content{
  display:none;padding:0 10px;
}
.mobile-dropdown-content.active{display:block}
.mobile-sub-title{
  font-weight:700;font-size:0.9rem;
  color:var(--accent-gold);
  padding:8px 10px;
  margin-top:8px;
}
.mobile-sub-link{
  display:block;padding:8px 20px;
  font-size:0.88rem;color:var(--text-secondary);
  transition:var(--transition);
  border-radius:var(--radius-sm);
}
.mobile-sub-link:hover{background:rgba(201,162,39,0.1);color:var(--accent-gold)}

/* ============ HERO SECTION ============ */
.hero{
  position:relative;
  min-height:450px;
  display:flex;align-items:center;
  overflow:hidden;
  background:var(--gradient-hero);
}
.hero-bg{
  position:absolute;
  top:0;left:0;right:0;bottom:0;
  background-image:url('assets/gold-bg.jpg');
  background-size:cover;
  background-position:center;
  opacity:0.15;
}
.hero-overlay{
  position:absolute;
  top:0;left:0;right:0;bottom:0;
  background:linear-gradient(135deg,rgba(13,13,26,0.92) 0%,rgba(26,26,46,0.85) 50%,rgba(15,52,96,0.8) 100%);
}
.hero-content{
  position:relative;z-index:2;
  text-align:center;
  max-width:800px;
  margin:0 auto;
  padding:60px 20px;
  animation:fadeInUp 0.8s ease;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(201,162,39,0.15);
  border:1px solid rgba(201,162,39,0.3);
  padding:8px 20px;
  border-radius:30px;
  font-size:0.88rem;
  color:var(--accent-gold);
  margin-bottom:20px;
  font-weight:600;
}
.hero h1{
  font-size:2.8rem;
  font-weight:900;
  line-height:1.3;
  margin-bottom:15px;
  background:var(--gradient-gold);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero p{
  font-size:1.15rem;
  color:var(--text-secondary);
  margin-bottom:30px;
  line-height:1.8;
}
.hero-search{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:8px;
  display:flex;
  align-items:center;
  max-width:600px;
  margin:0 auto;
  box-shadow:var(--shadow-md);
  transition:var(--transition);
}
.hero-search:focus-within{
  border-color:var(--accent-gold);
  box-shadow:0 0 0 3px rgba(201,162,39,0.2);
}
.hero-search input{
  flex:1;
  padding:12px 16px;
  background:transparent;
  color:var(--text-primary);
  font-size:1rem;
  border:none;
}
.hero-search input::placeholder{color:var(--text-secondary)}
.hero-search button{
  padding:12px 28px;
  background:var(--gradient-gold);
  color:#1a1a2e;
  border-radius:var(--radius-md);
  font-weight:700;
  font-size:0.95rem;
  transition:var(--transition);
  display:flex;align-items:center;gap:8px;
}
.hero-search button:hover{transform:scale(1.02);box-shadow:var(--shadow-gold)}
.hero-stats{
  display:flex;
  justify-content:center;
  gap:40px;
  margin-top:35px;
  flex-wrap:wrap;
}
.hero-stat{text-align:center}
.hero-stat .number{
  font-size:2rem;
  font-weight:900;
  color:var(--accent-gold);
  display:block;
}
.hero-stat .label{font-size:0.88rem;color:var(--text-secondary)}

/* ============ CATEGORIES SECTION ============ */
.categories{padding:50px 0}
.categories-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.category-card{
  position:relative;
  border-radius:var(--radius-md);
  overflow:hidden;
  cursor:pointer;
  transition:var(--transition);
  border:1px solid var(--border-color);
  background:var(--bg-card);
}
.category-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.category-card-img{
  height:180px;
  overflow:hidden;
  position:relative;
}
.category-card-img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:var(--transition);
}
.category-card:hover .category-card-img img{transform:scale(1.08)}
.category-card-label{
  position:absolute;
  top:0;left:0;right:0;
  padding:10px;
  text-align:center;
  font-weight:800;
  font-size:1rem;
  color:#fff;
  text-shadow:0 2px 4px rgba(0,0,0,0.5);
}
.category-card-label.st{background:linear-gradient(180deg,rgba(0,180,216,0.9),transparent)}
.category-card-label.eco{background:linear-gradient(180deg,rgba(123,47,247,0.9),transparent)}
.category-card-label.hum{background:linear-gradient(180deg,rgba(233,69,96,0.9),transparent)}
.category-card-label.med{background:linear-gradient(180deg,rgba(201,162,39,0.9),transparent)}
.category-subs{padding:12px 16px}
.category-subs a{
  display:block;
  padding:8px 12px;
  border-radius:var(--radius-sm);
  font-size:0.9rem;
  color:var(--text-secondary);
  transition:var(--transition);
  border-bottom:1px solid var(--border-color);
}
.category-subs a:last-child{border-bottom:none}
.category-subs a:hover{
  background:rgba(201,162,39,0.1);
  color:var(--accent-gold);
  padding-right:18px;
}

/* ============ STATS BAR ============ */
.stats-bar{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:30px;
  display:flex;
  justify-content:space-around;
  align-items:center;
  margin:40px auto;
  max-width:900px;
  box-shadow:var(--shadow-md);
  flex-wrap:wrap;
  gap:20px;
}
.stat-item{text-align:center}
.stat-item .stat-icon{
  font-size:2rem;
  margin-bottom:8px;
}
.stat-item .stat-number{
  font-size:1.8rem;
  font-weight:900;
  color:var(--accent-gold);
  display:block;
}
.stat-item .stat-label{font-size:0.88rem;color:var(--text-secondary)}

/* ============ FILES SECTION ============ */
.files-section{padding:50px 0}
.files-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:30px;
  flex-wrap:wrap;
  gap:15px;
}
.files-header h2{font-size:1.8rem;font-weight:800}
.files-tabs{display:flex;gap:8px;flex-wrap:wrap}
.file-tab{
  padding:8px 20px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:0.88rem;
  background:var(--bg-input);
  color:var(--text-secondary);
  cursor:pointer;
  transition:var(--transition);
}
.file-tab.active,.file-tab:hover{
  background:var(--gradient-gold);
  color:#1a1a2e;
}
.files-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:20px;
}
.file-card{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-md);
  padding:20px;
  transition:var(--transition);
  position:relative;
  overflow:hidden;
}
.file-card::before{
  content:'';
  position:absolute;
  top:0;right:0;
  width:4px;height:100%;
  background:var(--gradient-gold);
  opacity:0;
  transition:var(--transition);
}
.file-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-md);
  border-color:rgba(201,162,39,0.3);
}
.file-card:hover::before{opacity:1}
.file-card-header{display:flex;align-items:flex-start;gap:15px;margin-bottom:15px}
.file-icon{
  width:50px;height:60px;
  background:linear-gradient(135deg,#e74c3c,#c0392b);
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:900;font-size:0.75rem;
  flex-shrink:0;
  position:relative;
}
.file-icon::after{
  content:'';
  position:absolute;
  top:0;left:0;
  width:0;height:0;
  border-style:solid;
  border-width:0 12px 12px 0;
  border-color:transparent var(--bg-card) transparent transparent;
}
.file-info h3{font-size:1rem;font-weight:700;margin-bottom:4px;line-height:1.4}
.file-info .file-spec{
  display:flex;align-items:center;gap:8px;
  font-size:0.82rem;color:var(--text-secondary);
  flex-wrap:wrap;
}
.file-card-meta{
  display:flex;justify-content:space-between;
  align-items:center;
  padding:12px 0;
  border-top:1px solid var(--border-color);
  border-bottom:1px solid var(--border-color);
  margin-bottom:15px;
  flex-wrap:wrap;
  gap:8px;
}
.file-downloads{
  display:flex;align-items:center;gap:5px;
  font-size:0.85rem;color:var(--text-secondary);
}
.file-rating{display:flex;align-items:center;gap:3px}
.file-rating .star{
  color:#ccc;
  cursor:pointer;
  font-size:1.1rem;
  transition:var(--transition);
}
.file-rating .star.active,.file-rating .star:hover{color:#f0d060}
.file-card-actions{display:flex;gap:10px}
.file-card-actions .btn{flex:1;justify-content:center;font-size:0.88rem;padding:8px 12px}

/* ============ SPECIALIZATION PAGE ============ */
.spec-page{padding:40px 0}
.spec-page-header{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:30px;
  margin-bottom:30px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:15px;
}
.spec-page-header h1{font-size:1.8rem;font-weight:900}
.spec-page-header p{color:var(--text-secondary);font-size:0.95rem}
.spec-filters{display:flex;gap:10px;flex-wrap:wrap}
.spec-filter{
  padding:8px 16px;
  border-radius:var(--radius-sm);
  font-weight:600;font-size:0.88rem;
  background:var(--bg-input);
  color:var(--text-secondary);
  cursor:pointer;
  transition:var(--transition);
}
.spec-filter.active,.spec-filter:hover{
  background:var(--accent-gold);color:#1a1a2e;
}

/* ============ PDF VIEWER ============ */
.pdf-viewer-page{padding:30px 0}
.pdf-viewer-container{
  display:grid;
  grid-template-columns:1fr 350px;
  gap:25px;
}
.pdf-main{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-md);
  overflow:hidden;
}
.pdf-toolbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:12px 20px;
  background:var(--primary);
  border-bottom:1px solid var(--border-color);
  flex-wrap:wrap;
  gap:10px;
}
.pdf-toolbar-group{display:flex;align-items:center;gap:8px}
.pdf-toolbar button{
  background:var(--bg-input);
  color:var(--text-primary);
  padding:6px 12px;
  border-radius:var(--radius-sm);
  font-size:0.88rem;
  transition:var(--transition);
}
.pdf-toolbar button:hover{background:var(--accent-gold);color:#1a1a2e}
.pdf-frame{
  width:100%;
  height:75vh;
  border:none;
  background:#fff;
}
.pdf-sidebar{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.pdf-info-card{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-md);
  padding:20px;
}
.pdf-info-card h3{
  font-size:1.1rem;font-weight:700;
  margin-bottom:15px;
  padding-bottom:10px;
  border-bottom:2px solid rgba(201,162,39,0.2);
}
.pdf-info-item{
  display:flex;justify-content:space-between;
  padding:8px 0;
  border-bottom:1px solid var(--border-color);
  font-size:0.9rem;
}
.pdf-info-item:last-child{border-bottom:none}
.pdf-info-item .label{color:var(--text-secondary)}
.pdf-info-item .value{font-weight:600}
.related-files .related-file{
  display:flex;align-items:center;gap:10px;
  padding:10px;margin-bottom:8px;
  border-radius:var(--radius-sm);
  background:var(--bg-input);
  cursor:pointer;
  transition:var(--transition);
}
.related-files .related-file:hover{
  background:rgba(201,162,39,0.15);
}
.related-file .rf-icon{
  width:35px;height:42px;
  background:linear-gradient(135deg,#e74c3c,#c0392b);
  border-radius:5px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:0.65rem;font-weight:900;
  flex-shrink:0;
}
.related-file .rf-info{flex:1}
.related-file .rf-info h4{font-size:0.88rem;font-weight:600}
.related-file .rf-info span{font-size:0.78rem;color:var(--text-secondary)}

/* ============ SEARCH PAGE ============ */
.search-page{padding:40px 0}
.search-box{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:30px;
  margin-bottom:30px;
}
.search-input-wrap{
  display:flex;gap:10px;margin-bottom:20px;
}
.search-input-wrap input{
  flex:1;
  padding:14px 20px;
  background:var(--bg-input);
  color:var(--text-primary);
  border-radius:var(--radius-md);
  font-size:1rem;
}
.search-filters{display:flex;gap:10px;flex-wrap:wrap}
.search-filters select{
  padding:10px 16px;
  background:var(--bg-input);
  color:var(--text-primary);
  border-radius:var(--radius-sm);
  font-size:0.9rem;
  cursor:pointer;
}
.search-results-info{
  padding:15px 0;
  color:var(--text-secondary);
  font-size:0.95rem;
}

/* ============ ADMIN ============ */
.admin-page{display:flex;min-height:100vh}
.admin-sidebar{
  width:280px;
  background:var(--bg-card);
  border-left:1px solid var(--border-color);
  padding:20px 0;
  position:fixed;
  right:0;top:0;bottom:0;
  overflow-y:auto;
  z-index:500;
}
.admin-sidebar-header{
  padding:20px;
  text-align:center;
  border-bottom:1px solid var(--border-color);
  margin-bottom:15px;
}
.admin-sidebar-header h2{font-size:1.2rem;font-weight:800;color:var(--accent-gold)}
.admin-sidebar-header p{font-size:0.82rem;color:var(--text-secondary)}
.admin-nav-item{
  display:flex;align-items:center;gap:12px;
  padding:12px 20px;
  color:var(--text-secondary);
  font-weight:600;
  font-size:0.92rem;
  transition:var(--transition);
  cursor:pointer;
  margin:2px 10px;
  border-radius:var(--radius-sm);
}
.admin-nav-item:hover,.admin-nav-item.active{
  background:rgba(201,162,39,0.1);
  color:var(--accent-gold);
}
.admin-nav-item .nav-icon{font-size:1.2rem;width:24px;text-align:center}
.admin-content{
  flex:1;
  margin-right:280px;
  padding:30px;
  background:var(--bg-dark);
}
.admin-header{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:30px;flex-wrap:wrap;gap:15px;
}
.admin-header h1{font-size:1.6rem;font-weight:800}
.admin-stats{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:20px;
  margin-bottom:30px;
}
.admin-stat-card{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-md);
  padding:20px;
  display:flex;align-items:center;gap:15px;
  transition:var(--transition);
}
.admin-stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.admin-stat-icon{
  width:50px;height:50px;
  border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;
}
.admin-stat-icon.files{background:rgba(0,180,216,0.15);color:var(--accent-blue)}
.admin-stat-icon.downloads{background:rgba(201,162,39,0.15);color:var(--accent-gold)}
.admin-stat-icon.specs{background:rgba(123,47,247,0.15);color:var(--accent-purple)}
.admin-stat-icon.views{background:rgba(233,69,96,0.15);color:var(--accent)}
.admin-stat-info .stat-number{font-size:1.5rem;font-weight:900;display:block}
.admin-stat-info .stat-label{font-size:0.85rem;color:var(--text-secondary)}
.admin-card{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-md);
  margin-bottom:25px;
}
.admin-card-header{
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 20px;
  border-bottom:1px solid var(--border-color);
  flex-wrap:wrap;gap:10px;
}
.admin-card-header h2{font-size:1.15rem;font-weight:700}
.admin-card-body{padding:20px}
.admin-table{width:100%;border-collapse:collapse}
.admin-table th,.admin-table td{
  padding:12px 16px;
  text-align:right;
  border-bottom:1px solid var(--border-color);
  font-size:0.9rem;
}
.admin-table th{
  font-weight:700;
  color:var(--text-secondary);
  background:rgba(201,162,39,0.05);
}
.admin-table tr:hover{background:rgba(201,162,39,0.05)}
.admin-table .actions{display:flex;gap:6px}
.admin-table .actions button{
  padding:5px 10px;
  border-radius:5px;
  font-size:0.8rem;
  font-weight:600;
  transition:var(--transition);
}
.admin-table .actions .edit-btn{
  background:rgba(0,180,216,0.15);color:var(--accent-blue);
}
.admin-table .actions .edit-btn:hover{background:var(--accent-blue);color:#fff}
.admin-table .actions .delete-btn{
  background:rgba(233,69,96,0.15);color:var(--accent);
}
.admin-table .actions .delete-btn:hover{background:var(--accent);color:#fff}

/* Admin Login */
.admin-login-page{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  background:var(--gradient-hero);
}
.admin-login-card{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:40px;
  width:100%;max-width:420px;
  box-shadow:var(--shadow-lg);
}
.admin-login-card h2{
  font-size:1.6rem;font-weight:800;
  text-align:center;margin-bottom:8px;
}
.admin-login-card p{
  text-align:center;color:var(--text-secondary);
  margin-bottom:25px;font-size:0.92rem;
}
.form-group{margin-bottom:18px}
.form-group label{
  display:block;margin-bottom:6px;
  font-weight:600;font-size:0.92rem;
}
.form-group input,.form-group select,.form-group textarea{
  width:100%;
  padding:12px 16px;
  background:var(--bg-input);
  color:var(--text-primary);
  border-radius:var(--radius-sm);
  font-size:0.95rem;
  transition:var(--transition);
  border:1px solid var(--border-color);
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  border-color:var(--accent-gold);
  box-shadow:0 0 0 3px rgba(201,162,39,0.15);
}
.form-group textarea{resize:vertical;min-height:100px}
.form-error{color:var(--accent);font-size:0.82rem;margin-top:4px}
.form-row{display:flex;gap:15px}
.form-row .form-group{flex:1}

/* ============ MODAL ============ */
.modal-overlay{
  position:fixed;top:0;left:0;right:0;bottom:0;
  background:rgba(0,0,0,0.6);
  display:none;align-items:center;justify-content:center;
  z-index:3000;
  backdrop-filter:blur(5px);
}
.modal-overlay.active{display:flex}
.modal{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:30px;
  width:95%;max-width:550px;
  max-height:90vh;overflow-y:auto;
  animation:fadeInUp 0.3s ease;
}
.modal-header{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:20px;padding-bottom:15px;
  border-bottom:1px solid var(--border-color);
}
.modal-header h2{font-size:1.2rem;font-weight:800}
.modal-close{
  width:36px;height:36px;
  border-radius:50%;
  background:var(--bg-input);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:1.2rem;
  transition:var(--transition);
}
.modal-close:hover{background:var(--accent);color:#fff}

/* ============ FOOTER ============ */
.footer{
  background:var(--primary);
  border-top:1px solid var(--border-color);
  padding:50px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:30px;
  padding-bottom:40px;
}
.footer-about{max-width:340px}
.footer-about .logo{margin-bottom:15px}
.footer-about p{color:var(--text-secondary);font-size:0.9rem;line-height:1.8}
.footer h4{
  font-size:1rem;font-weight:700;
  margin-bottom:15px;
  color:var(--accent-gold);
}
.footer ul li{margin-bottom:8px}
.footer ul li a{
  color:var(--text-secondary);
  font-size:0.9rem;
  transition:var(--transition);
}
.footer ul li a:hover{color:var(--accent-gold);padding-right:5px}
.footer-bottom{
  border-top:1px solid var(--border-color);
  padding:20px 0;
  text-align:center;
  color:var(--text-secondary);
  font-size:0.85rem;
}
.footer-social{display:flex;gap:10px;margin-top:15px}
.footer-social a{
  width:38px;height:38px;
  border-radius:50%;
  background:var(--bg-input);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-secondary);
  transition:var(--transition);
  font-size:1.1rem;
}
.footer-social a:hover{background:var(--accent-gold);color:#1a1a2e}

/* ============ STATIC PAGES ============ */
.static-page{padding:50px 0}
.static-page-content{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:40px;
  max-width:900px;
  margin:0 auto;
}
.static-page-content h1{
  font-size:2rem;font-weight:900;
  margin-bottom:20px;
  color:var(--accent-gold);
}
.static-page-content h2{
  font-size:1.3rem;font-weight:700;
  margin:25px 0 10px;
}
.static-page-content p{
  color:var(--text-secondary);
  line-height:2;
  margin-bottom:15px;
}
.contact-form{max-width:600px}

/* ============ DARK MODE TOGGLE ============ */
.theme-toggle{
  width:42px;height:42px;
  border-radius:50%;
  background:var(--bg-input);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:1.2rem;
  transition:var(--transition);
  border:1px solid var(--border-color);
}
.theme-toggle:hover{background:var(--accent-gold);color:#1a1a2e}

/* ============ NOTIFICATION ============ */
.notification{
  position:fixed;
  bottom:20px;left:20px;
  background:var(--bg-card);
  border:1px solid var(--accent-gold);
  border-radius:var(--radius-md);
  padding:15px 20px;
  box-shadow:var(--shadow-lg);
  z-index:5000;
  transform:translateY(100px);
  opacity:0;
  transition:var(--transition);
  max-width:350px;
  display:flex;align-items:center;gap:10px;
}
.notification.show{transform:translateY(0);opacity:1}
.notification.success{border-color:#27ae60}
.notification.error{border-color:var(--accent)}

/* ============ PAGINATION ============ */
.pagination{
  display:flex;
  justify-content:center;
  gap:6px;
  margin-top:30px;
}
.pagination button{
  width:38px;height:38px;
  border-radius:var(--radius-sm);
  background:var(--bg-card);
  border:1px solid var(--border-color);
  color:var(--text-secondary);
  font-weight:600;
  transition:var(--transition);
}
.pagination button.active,.pagination button:hover{
  background:var(--accent-gold);
  color:#1a1a2e;
  border-color:var(--accent-gold);
}

/* ============ BACK TO TOP ============ */
.back-to-top{
  position:fixed;
  bottom:20px;right:20px;
  width:45px;height:45px;
  border-radius:50%;
  background:var(--gradient-gold);
  color:#1a1a2e;
  display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;
  cursor:pointer;
  opacity:0;visibility:hidden;
  transition:var(--transition);
  box-shadow:var(--shadow-gold);
  z-index:900;
}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px)}

/* ============ RESPONSIVE ============ */
@media(max-width:1024px){
  .categories-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .pdf-viewer-container{grid-template-columns:1fr}
  .admin-sidebar{width:220px}
  .admin-content{margin-right:220px}
  .mega-dropdown{width:500px;grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links{display:none}
  .mobile-toggle{display:flex}
  .mobile-menu{display:block}
  .categories-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:1.8rem}
  .hero p{font-size:1rem}
  .hero-stats{gap:20px}
  .hero-stat .number{font-size:1.5rem}
  .files-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .stats-bar{flex-direction:column;gap:15px}
  .admin-sidebar{
    width:100%;position:relative;
    border-left:none;border-bottom:1px solid var(--border-color);
  }
  .admin-page{flex-direction:column}
  .admin-content{margin-right:0}
  .admin-stats{grid-template-columns:1fr 1fr}
  .mega-dropdown{display:none}
  .form-row{flex-direction:column}
  .search-input-wrap{flex-direction:column}
  .section-title{font-size:1.5rem}
  .admin-table{font-size:0.8rem}
  .admin-table th,.admin-table td{padding:8px 10px}
}
@media(max-width:480px){
  .categories-grid{grid-template-columns:1fr}
  .hero h1{font-size:1.5rem}
  .admin-stats{grid-template-columns:1fr}
  .hero-search{flex-direction:column}
  .hero-search button{width:100%}
  .file-card-actions{flex-direction:column}
}