/* ===== EDU PLATFORM — Global Design System ===== */
@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;500;600;700;800;900&display=swap');

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
--dark:#1a1a2e;--dark2:#16213e;--dark3:#0f3460;
--gold:#c9a84c;--gold-light:#d4b96a;--gold-dark:#a88a3a;--gold-darker:#8a6e2a;
--white:#ffffff;--off-white:#f8f7f4;--light:#eae8e3;
--gray1:#6b7280;--gray2:#9ca3af;--gray3:#d1d5db;
--success:#10b981;--danger:#ef4444;--info:#3b82f6;
--text:#1a2e3f;--text-light:#5a7184;--text-muted:#8896a4;
--radius:12px;--radius-lg:20px;--radius-sm:8px;
--shadow:0 4px 20px rgba(0,0,0,.08);--shadow-lg:0 10px 40px rgba(0,0,0,.12);--shadow-xl:0 20px 60px rgba(0,0,0,.18);
--ease-snap:cubic-bezier(.76,0,.24,1);
--transition:all .35s var(--ease-snap);
--font:'Cairo',system-ui,-apple-system,sans-serif;
}
html,body{height:100%}
body{font-family:var(--font);background:var(--off-white);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--gold-dark);text-decoration:none;transition:color .3s var(--ease-snap)}
a:hover{color:var(--gold);text-decoration:none}
button{font-family:inherit;cursor:pointer}
img{max-width:100%;height:auto}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:50px;border:none;font-size:14px;font-weight:700;cursor:pointer;transition:transform .4s var(--ease-snap),box-shadow .4s var(--ease-snap),background .4s var(--ease-snap),color .4s var(--ease-snap),border-color .4s var(--ease-snap);white-space:nowrap}
.btn:hover{transform:scale(1.04) translateY(-2px)}
.btn:active{transform:scale(.97)}
.btn-primary{background:#212135;color:var(--white)}
.btn-primary:hover{background:var(--gold);box-shadow:0 8px 24px rgba(168,138,58,.35)}
.btn-accent{background:var(--danger);color:var(--white)}
.btn-accent:hover{background:#dc2626;box-shadow:0 8px 24px rgba(239,68,68,.3)}
.btn-green{background:var(--success);color:var(--white)}
.btn-green:hover{background:#059669;box-shadow:0 8px 24px rgba(16,185,129,.3)}
.btn-red{background:var(--danger);color:var(--white)}
.btn-red:hover{background:#dc2626}
.btn-outline{background:transparent;border:1.5px solid var(--gray3);color:var(--text)}
.btn-outline:hover{background:var(--dark);color:var(--white);border-color:var(--dark)}
.btn-dark{background:var(--dark);color:var(--white)}
.btn-dark:hover{background:var(--dark2)}
.btn-sm{padding:6px 14px;font-size:12px;border-radius:50px}
.btn-lg{padding:14px 32px;font-size:16px}

/* ===== HEADER ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:14px 32px;transition:var(--transition);background:transparent}
.site-header.scrolled{background:rgba(26,26,46,.97);backdrop-filter:blur(20px) saturate(180%);box-shadow:0 2px 20px rgba(0,0,0,.15);padding:10px 32px}
.site-header.scrolled .hdr-logo{color:var(--white)}.site-header.scrolled .hdr-logo-icon{background:var(--gold-dark);color:var(--white)}.site-header.scrolled .hdr-nav a:not(.btn):not(.hdr-hamburger){color:rgba(255,255,255,.8)}.site-header.scrolled .hdr-nav a:not(.btn):not(.hdr-hamburger):hover{color:var(--white);background:rgba(255,255,255,.1)}
.hdr-inner{max-width:1320px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.hdr-logo{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:900;color:var(--dark);transition:color .3s var(--ease-snap)}
.hdr-logo-icon{width:40px;height:40px;background:var(--dark3);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--gold);transition:var(--transition)}
.hdr-nav{display:flex;align-items:center;gap:8px}
.hdr-nav a{padding:8px 16px;border-radius:var(--radius);font-size:14px;font-weight:600;color:var(--gray1);transition:var(--transition)}
.hdr-nav a:hover{color:var(--dark);background:var(--light)}
.hdr-nav .avatar-circle{width:36px;height:36px;border-radius:50%;background:var(--dark);color:var(--gold);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;cursor:pointer;transition:var(--transition)}
.hdr-nav .avatar-circle:hover{background:var(--dark3);transform:scale(1.1)}

/* ===== MOBILE HEADER ===== */
.hdr-hamburger{display:none;background:none;border:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer;z-index:1001}
.hdr-hamburger span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
@media(max-width:768px){
.hdr-hamburger{display:flex}
.hdr-nav{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(26,26,46,.98);backdrop-filter:blur(20px);flex-direction:column;justify-content:center;gap:16px;transform:translateX(100%);transition:transform .5s var(--ease-snap);z-index:999}
.hdr-nav.open{transform:translateX(0)}
.hdr-nav a{color:var(--white)!important;font-size:18px;padding:14px 24px;border-radius:var(--radius)}
}

/* ===== AUTH PAGES ===== */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.auth-page-bg{position:absolute;inset:0;background:linear-gradient(135deg,var(--dark) 0%,var(--dark2) 40%,var(--dark3) 100%);z-index:0}
.auth-page-bg::after{content:'';position:absolute;inset:0;background:url('https://images.unsplash.com/photo-1523050854058-8df90110c8f1?w=1400&q=80') center/cover no-repeat;opacity:.12}
.auth-card{position:relative;z-index:2;width:100%;max-width:440px;margin:20px;background:rgba(255,255,255,.06);backdrop-filter:blur(16px) saturate(180%);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);padding:44px 36px;animation:authCardIn .8s var(--ease-snap) both}
@keyframes authCardIn{from{opacity:0;transform:translateY(30px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.auth-card .logo-link{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:900;color:var(--white);justify-content:center;margin-bottom:8px}
.auth-card .logo-link .hdr-logo-icon{width:44px;height:44px;font-size:18px}
.auth-card h2{text-align:center;color:var(--white);font-size:26px;font-weight:800;margin-bottom:6px}
.auth-card .subtitle{text-align:center;color:rgba(255,255,255,.55);font-size:14px;margin-bottom:28px}
.auth-card .form-group{margin-bottom:18px}
.auth-card .form-group label{display:block;margin-bottom:6px;font-size:13px;color:rgba(255,255,255,.6);font-weight:600}
.auth-card .form-group input,.auth-card .form-group select,.auth-card .form-group textarea{width:100%;padding:12px 16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-sm);color:var(--white);font-size:14px;font-family:var(--font);outline:none;transition:border-color .3s var(--ease-snap)}
.auth-card .form-group input::placeholder,.auth-card .form-group textarea::placeholder{color:rgba(255,255,255,.3)}
.auth-card .form-group input:focus,.auth-card .form-group select:focus,.auth-card .form-group textarea:focus{border-color:var(--gold)}
.auth-card .form-group textarea{min-height:80px;resize:vertical}
.auth-card .form-error{background:rgba(239,68,68,.15);border:1px solid rgba(239,68,68,.3);color:#fca5a5;font-size:13px;margin-bottom:14px;text-align:center;border-radius:var(--radius-sm);padding:10px}
.auth-card .form-success{background:rgba(16,185,129,.15);border:1px solid rgba(16,185,129,.3);color:#6ee7b7;font-size:13px;margin-bottom:14px;text-align:center;border-radius:var(--radius-sm);padding:10px}
.auth-card .btn{width:100%;justify-content:center;padding:14px;font-size:16px;margin-top:6px}
.auth-card .switch-link{text-align:center;margin-top:20px;font-size:13px;color:rgba(255,255,255,.45)}
.auth-card .switch-link a{color:var(--gold);font-weight:600}
.auth-card .switch-link a:hover{color:var(--gold-light)}

/* ===== DASHBOARD LAYOUT ===== */
.dashboard{display:flex;min-height:100vh;padding-top:0}
.dash-sidebar{width:260px;background:var(--dark);border-left:1px solid rgba(255,255,255,.06);padding:80px 0 24px;flex-shrink:0;position:fixed;top:0;bottom:0;right:0;overflow-y:auto;z-index:50;transition:transform .5s var(--ease-snap)}
.dash-sidebar::-webkit-scrollbar{width:0}
.dash-sidebar a{display:flex;align-items:center;gap:12px;padding:12px 24px;color:rgba(255,255,255,.5);font-size:14px;font-weight:600;transition:var(--transition);border-right:3px solid transparent}
.dash-sidebar a:hover{background:rgba(255,255,255,.06);color:var(--white);text-decoration:none}
.dash-sidebar a.active{background:rgba(201,168,76,.08);color:var(--gold);border-right-color:var(--gold)}
.dash-sidebar a .icon{width:20px;display:flex;justify-content:center;flex-shrink:0}
.dash-sidebar .sidebar-label{padding:20px 24px 8px;font-size:11px;text-transform:uppercase;letter-spacing:1px;color:rgba(255,255,255,.25);font-weight:700}
.dash-main{flex:1;padding:80px 32px 32px;min-height:100vh;background:var(--off-white);margin-right:240px}
@media(max-width:900px){
.dash-sidebar{transform:translateX(100%)}
.dash-sidebar.open{transform:translateX(0)}
.dash-main{margin-right:0;padding:70px 16px 24px}
.dash-toggle{display:flex!important}
}

/* ===== DASHBOARD STAT CARDS ===== */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-bottom:32px}
.stat-card{background:var(--white);border:1px solid var(--light);border-radius:var(--radius);padding:24px;transition:transform .4s var(--ease-snap),box-shadow .4s var(--ease-snap)}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.stat-card .label{font-size:13px;color:var(--text-muted);margin-bottom:6px;font-weight:600}
.stat-card .value{font-size:32px;font-weight:800;color:var(--dark)}
.stat-card .change{font-size:12px;margin-top:4px}
.stat-card .change.up{color:var(--success)}
.stat-card .change.down{color:var(--danger)}

/* ===== TABLES ===== */
.table-wrap{background:var(--white);border:1px solid var(--light);border-radius:var(--radius);overflow:hidden;margin-bottom:24px;transition:box-shadow .4s var(--ease-snap)}
.table-wrap:hover{box-shadow:var(--shadow)}
.table-wrap h3,.table-wrap .tw-header{padding:18px 24px;border-bottom:1px solid var(--light);font-size:16px;font-weight:700;color:var(--dark)}
table{width:100%;border-collapse:collapse}
th,td{padding:14px 20px;text-align:right;border-bottom:1px solid var(--light);font-size:13px}
th{background:var(--off-white);color:var(--text-muted);font-weight:700;font-size:12px;text-transform:uppercase;letter-spacing:.5px}
tr:last-child td{border-bottom:none}
tr:hover td{background:rgba(201,168,76,.03)}
.badge{padding:4px 12px;border-radius:50px;font-size:11px;font-weight:700;display:inline-block}
.badge-green{background:rgba(16,185,129,.1);color:var(--success)}
.badge-gold{background:rgba(201,168,76,.12);color:var(--gold-dark)}
.badge-red{background:rgba(239,68,68,.1);color:var(--danger)}
.badge-blue{background:rgba(59,130,246,.1);color:var(--info)}

/* ===== MODALS ===== */
.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(26,26,46,.6);backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;z-index:2000;animation:modalOverlayIn .3s var(--ease-snap)}
.modal-overlay.active{display:flex}
@keyframes modalOverlayIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--white);border:1px solid var(--light);border-radius:var(--radius-lg);padding:32px;width:90%;max-width:520px;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-xl);animation:modalIn .4s var(--ease-snap) both}
@keyframes modalIn{from{opacity:0;transform:translateY(20px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.modal h3{margin-bottom:20px;font-size:20px;font-weight:800;color:var(--dark)}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px}

/* ===== FORMS ===== */
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:6px;font-size:13px;color:var(--text-muted);font-weight:600}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 16px;background:var(--off-white);border:1.5px solid var(--light);border-radius:var(--radius-sm);color:var(--text);font-size:14px;font-family:var(--font);outline:none;transition:border-color .3s var(--ease-snap),box-shadow .3s var(--ease-snap)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,168,76,.15)}
.form-group textarea{min-height:80px;resize:vertical}
.form-error{color:var(--danger);font-size:13px;margin-bottom:12px;text-align:center}
.form-success{color:var(--success);font-size:13px;margin-bottom:12px;text-align:center}

/* ===== CHANNEL GRID (public) ===== */
.container{max-width:1320px;margin:0 auto;padding:24px}
.section-title{font-size:20px;font-weight:800;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--light);color:var(--dark);display:flex;align-items:center;gap:10px}
.channel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-bottom:40px}
.channel-card{background:var(--white);border-radius:var(--radius);overflow:hidden;border:1px solid var(--light);transition:transform .4s var(--ease-snap),box-shadow .4s var(--ease-snap);cursor:pointer}
.channel-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.channel-cover{width:100%;height:150px;background:linear-gradient(135deg,var(--dark),var(--dark3));object-fit:cover}
.channel-info{padding:18px}
.channel-info h3{font-size:16px;font-weight:700;margin-bottom:4px;color:var(--dark)}
.channel-info p{font-size:13px;color:var(--text-muted);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.channel-meta{display:flex;gap:14px;font-size:12px;color:var(--text-muted)}

/* ===== CATEGORIES BAR ===== */
.categories-bar{display:flex;gap:8px;overflow-x:auto;padding:16px 0;margin-bottom:20px;scrollbar-width:none}
.categories-bar::-webkit-scrollbar{display:none}
.cat-chip{padding:8px 18px;background:var(--white);border:1.5px solid var(--light);border-radius:50px;white-space:nowrap;cursor:pointer;font-size:13px;font-weight:600;color:var(--text-light);transition:var(--transition)}
.cat-chip:hover,.cat-chip.active{background:var(--dark);border-color:var(--dark);color:var(--white)}

/* ===== VIDEO GRID ===== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-bottom:40px}
.video-card{background:var(--white);border-radius:var(--radius);overflow:hidden;border:1px solid var(--light);transition:transform .4s var(--ease-snap),box-shadow .4s var(--ease-snap);cursor:pointer}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.video-thumb{width:100%;aspect-ratio:16/9;background:var(--dark);position:relative;overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease-snap)}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.video-thumb .duration{position:absolute;bottom:8px;right:8px;background:rgba(26,26,46,.85);padding:3px 8px;border-radius:4px;font-size:12px;color:var(--white);font-weight:600}
.video-info{padding:14px 18px}
.video-info h4{font-size:14px;font-weight:700;margin-bottom:4px;color:var(--dark);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-info .meta{font-size:12px;color:var(--text-muted)}

/* ===== CHANNEL PAGE ===== */
.ch-page-header{position:relative}
.ch-page-header .cover{width:100%;height:220px;background:linear-gradient(135deg,var(--dark),var(--dark3));object-fit:cover;border-radius:var(--radius);overflow:hidden}
.ch-page-header .info{display:flex;align-items:center;gap:20px;padding:24px 0;flex-wrap:wrap}
.ch-page-header .info .ch-avatar{width:80px;height:80px;border-radius:50%;background:var(--dark);color:var(--gold);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:800;flex-shrink:0;border:3px solid var(--white);box-shadow:var(--shadow)}
.ch-page-header .info .details h1{font-size:26px;font-weight:800;color:var(--dark);margin-bottom:4px}
.ch-page-header .info .details p{color:var(--text-muted);font-size:14px}
.ch-tabs{display:flex;gap:0;border-bottom:2px solid var(--light);margin-bottom:24px}
.ch-tabs .tab{padding:14px 28px;cursor:pointer;font-size:14px;font-weight:700;color:var(--text-muted);border-bottom:2px solid transparent;margin-bottom:-2px;transition:var(--transition)}
.ch-tabs .tab:hover{color:var(--dark)}
.ch-tabs .tab.active{color:var(--gold-dark);border-bottom-color:var(--gold-dark)}

/* ===== PACKAGES ===== */
.packages-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.pkg-card{background:var(--white);border:2px solid var(--light);border-radius:var(--radius-lg);padding:28px;text-align:center;position:relative;transition:transform .4s var(--ease-snap),box-shadow .4s var(--ease-snap),border-color .4s var(--ease-snap)}
.pkg-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.pkg-card.featured{border-color:var(--gold)}
.pkg-card.featured::before{content:'الأكثر طلباً';position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--gold-dark),var(--gold));color:var(--white);padding:4px 20px;border-radius:50px;font-size:12px;font-weight:700}
.pkg-card .name{font-size:22px;font-weight:800;color:var(--dark);margin-bottom:4px}
.pkg-card .price{font-size:36px;font-weight:900;margin:16px 0;color:var(--dark)}
.pkg-card .price small{font-size:14px;font-weight:400;color:var(--text-muted)}
.pkg-card .features{list-style:none;text-align:right;margin:20px 0}
.pkg-card .features li{padding:8px 0;font-size:13px;color:var(--text-light);border-bottom:1px solid var(--light)}
.pkg-card .features li:last-child{border-bottom:none}
.pkg-card .features li::before{content:'\2713 ';color:var(--success);font-weight:700;margin-left:6px}

/* ===== AVATAR ===== */
.avatar{width:36px;height:36px;border-radius:50%;background:var(--dark);color:var(--gold);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;overflow:hidden;flex-shrink:0}
.avatar img{width:100%;height:100%;object-fit:cover}
.avatar-lg{width:80px;height:80px;font-size:32px}

/* ===== PAGE HEADER TITLE BAR ===== */
.page-title-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.page-title-bar h2{font-size:22px;font-weight:800;color:var(--dark)}
.dash-toggle{display:none;background:none;border:1.5px solid var(--light);border-radius:var(--radius-sm);padding:8px 12px;color:var(--text);font-size:14px;cursor:pointer;align-items:center;gap:6px}

/* ===== EMPTY STATE ===== */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}
.empty-state svg{margin-bottom:16px;opacity:.3}
.empty-state p{font-size:15px}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--gray3);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--gray2)}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
.channel-grid,.video-grid{grid-template-columns:1fr}
.stat-grid{grid-template-columns:1fr 1fr}
.packages-grid{grid-template-columns:1fr}
.auth-card{padding:32px 24px;margin:12px}
.ch-page-header .info{flex-direction:column;text-align:center}
.ch-page-header .info .details{text-align:center}
}
@media(max-width:480px){
.stat-grid{grid-template-columns:1fr}
}