:root{
  --navy:#0b1736;
  --navy-2:#12254d;
  --gold:#d8b36a;
  --gold-2:#f2ddb2;
  --white:#ffffff;
  --text:#1c2434;
  --muted:#6c778d;
  --line:#e8ecf4;
  --bg:#f6f8fc;
  --danger:#d9534f;
  --success:#1e8e5a;
  --shadow:0 18px 45px rgba(11,23,54,.10);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Arial,sans-serif;color:var(--text);background:var(--bg)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(1180px,92%);margin:0 auto}
.narrow-container{width:min(760px,92%);margin:0 auto}
.page-section{padding:42px 0 72px}
.section-title{margin:0 0 18px;font-size:1.2rem}
.eyebrow{display:inline-block;margin-bottom:10px;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold)}
h1,h2,h3{line-height:1.15;margin:0 0 12px}
p{line-height:1.65;color:var(--muted)}
.topbar,.admin-topbar{position:sticky;top:0;z-index:30;background:rgba(11,23,54,.92);backdrop-filter:blur(14px)}
.topbar-inner,.admin-topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.brand,.admin-brand{font-weight:800;color:#fff;font-size:1.3rem;letter-spacing:.02em}
.brand span,.admin-brand span{color:var(--gold)}
.nav-links{display:flex;gap:14px;align-items:center}
.nav-links a{color:#e8eefc;padding:10px 12px;border-radius:12px}
.nav-links a:hover{background:rgba(255,255,255,.08)}
.menu-toggle{display:none;border:0;background:transparent;color:#fff;font-size:1.35rem;cursor:pointer}
.hero{padding:58px 0 72px;background:radial-gradient(circle at top right, rgba(216,179,106,.25), transparent 28%),linear-gradient(140deg,var(--navy),#132a59)}
.hero-card,.card,.glass-panel,.stat-card,.course-card,.lesson-row,.auth-card{border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card{padding:46px;color:#fff;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12)}
.hero-card p{color:#dbe4fa}
.hero-compact{padding-top:34px}
.auth-page{min-height:100vh;background:radial-gradient(circle at top left, rgba(216,179,106,.18), transparent 25%),linear-gradient(145deg, var(--navy), #102145)}
.auth-shell{min-height:100vh;display:grid;place-items:center;padding:30px 0}
.auth-card{width:min(1100px,92%);display:grid;grid-template-columns:1.1fr .9fr;overflow:hidden;background:#fff}
.auth-card.single-card{grid-template-columns:1fr;max-width:640px}
.auth-copy{padding:54px;background:linear-gradient(145deg,var(--navy),#17366f);color:#fff}
.auth-copy p,.auth-copy li{color:#d7e0f6}
.auth-form{padding:42px}
.auth-form.full-width{padding:46px}
.feature-list{padding-left:18px;line-height:1.8}
label{display:block;font-size:.95rem;font-weight:600;color:#344258;margin-bottom:15px}
input,textarea,select{width:100%;margin-top:8px;border:1px solid var(--line);border-radius:14px;padding:14px 15px;font:inherit;outline:none;background:#fff}
input:focus,textarea:focus,select:focus{border-color:#9eb3e6;box-shadow:0 0 0 4px rgba(79,115,197,.1)}
button{font:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:13px 18px;font-weight:700;cursor:pointer;transition:.2s transform,.2s box-shadow,.2s background}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--gold),#bf9248);color:#171717}
.btn-outline{background:#fff;border:1px solid #dce4f1;color:var(--navy)}
.btn-dark{background:var(--navy);color:#fff}
.btn-disabled{background:#e7ebf2;color:#8b95a9;cursor:not-allowed}
.btn-sm{padding:8px 12px;border-radius:10px}
.btn-block{width:100%}
.auth-links{display:flex;justify-content:space-between;gap:12px;margin-top:16px;font-size:.92rem}
.auth-links a{color:var(--navy)}
.flash{position:fixed;top:16px;right:16px;padding:14px 16px;border-radius:14px;color:#fff;z-index:60;box-shadow:var(--shadow)}
.flash-success{background:var(--success)}
.flash-error{background:var(--danger)}

/* Login timeout message */
.alert{
  padding:12px 16px;
  border-radius:12px;
  margin-bottom:16px;
  font-size:14px;
  font-weight:600;
}

.alert-warning{
  background:#fff3cd;
  color:#856404;
  border:1px solid #ffeeba;
}


.page-header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:24px}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:26px}
.stats-grid.four{grid-template-columns:repeat(4,1fr)}
.stat-card{padding:24px;background:#fff}
.stat-card span{display:block;color:var(--muted);margin-bottom:12px}
.stat-card strong{font-size:2rem;color:var(--navy)}
.content-grid{display:grid;gap:22px}
.content-grid.two-col{grid-template-columns:1.4fr .9fr}
.card,.glass-panel{padding:28px;background:#fff}
.glass-panel{background:linear-gradient(180deg,rgba(255,255,255,.92),rgba(248,250,255,.92));border:1px solid rgba(17,35,72,.06)}
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.course-card{overflow:hidden;background:#fff}
.course-thumb{height:180px;background:#123 center/cover no-repeat}
.course-card-body{padding:20px}
.pill{display:inline-block;background:#f2f5fb;color:#36425a;border-radius:999px;padding:8px 12px;font-size:.8rem;font-weight:700}
.progress-row{display:flex;align-items:center;gap:12px;margin:15px 0}
.progress{height:10px;flex:1;background:#edf2fb;border-radius:999px;overflow:hidden}
.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--gold),#b8863c);border-radius:999px}
.activity-list,.resource-list{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.activity-list li,.resource-list li{padding:14px 0;border-bottom:1px solid var(--line)}
.activity-list li:last-child,.resource-list li:last-child{border-bottom:0}
.activity-list strong{display:block;margin-bottom:6px}
.activity-list span,.muted-text{color:var(--muted)}
.activity-list small{color:#8a94a9}
.empty-state{text-align:center;padding:40px 24px;background:#fff;border:1px dashed #d9e2f2;border-radius:20px}
.course-hero{display:grid;grid-template-columns:1.3fr .7fr;gap:22px;margin-bottom:24px}
.stat-stack strong{font-size:2rem;color:var(--navy);margin:10px 0}
.lesson-list{display:grid;gap:16px}
.lesson-row{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:22px;background:#fff}
.lesson-row.locked{opacity:.8}
.lesson-meta{display:flex;align-items:center;gap:14px}
.status{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;font-size:.85rem;font-weight:700;text-transform:capitalize}
.status-not_started{background:#eef3ff;color:#4964a5}
.status-viewed{background:#fff4db;color:#9c6b13}
.status-completed{background:#e4f6ed;color:#18764d}
.lesson-layout{display:grid;grid-template-columns:320px 1fr;gap:22px}
.lesson-sidebar{position:sticky;top:94px;height:fit-content}
.stack-actions{display:grid;gap:10px;margin-top:20px}
.editor-content{font-size:1rem;line-height:1.8;color:#273247;padding:8px 0 18px}
.media-panel{margin:24px 0;padding-top:22px;border-top:1px solid var(--line)}
.video-wrapper{position:relative;padding-top:56.25%;overflow:hidden;border-radius:18px;background:#0f1626}
.video-wrapper iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.success-box{padding:16px 18px;background:#e8f7ef;border-radius:16px;color:#155838;font-weight:700}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.form-grid .full-span{grid-column:1/-1}
.checkbox-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.checkbox-label{display:flex;align-items:center;gap:10px;font-weight:600}
.checkbox-label input{width:auto;margin:0}
.toolbar{display:flex;gap:12px;margin-bottom:18px}
.toolbar input{max-width:320px}
.table-card{overflow:auto}
.table{width:100%;border-collapse:collapse;min-width:720px}
.table th,.table td{padding:16px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.table th{font-size:.85rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.table-actions{display:flex;gap:12px}
.admin-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.admin-sidebar{background:linear-gradient(180deg,var(--navy),#102145);padding:22px 16px;position:sticky;top:0;height:100vh}
.admin-sidebar nav{display:grid;gap:8px;margin-top:22px}
.admin-sidebar a{color:#edf2ff;padding:12px 14px;border-radius:14px}
.admin-sidebar a:hover{background:rgba(255,255,255,.08)}
.admin-content{padding:24px}
.action-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media (max-width: 1024px){
  .content-grid.two-col,.course-hero,.lesson-layout,.auth-card,.admin-shell{grid-template-columns:1fr}
  .stats-grid.four,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid{grid-template-columns:1fr}
  .admin-sidebar{position:fixed;left:-280px;top:0;height:100vh;width:260px;z-index:40;transition:left .25s}
  .admin-sidebar.open{left:0}
  .admin-topbar{padding:16px 4%}
  .admin-content{padding:22px 4%}
  .menu-toggle{display:inline-block}
}
@media (max-width: 720px){
  .nav-links{display:none;position:absolute;top:68px;right:4%;flex-direction:column;background:var(--navy);padding:12px;border-radius:16px;width:min(260px,92vw)}
  .nav-links.open{display:flex}
  .stats-grid,.stats-grid.four,.form-grid,.checkbox-grid,.action-grid{grid-template-columns:1fr}
  .page-header,.lesson-row,.toolbar{flex-direction:column;align-items:flex-start}
  .auth-form,.auth-copy,.card,.glass-panel,.hero-card{padding:24px}
}