/* ============================================================
   Marelan English Course — LMS stylesheet
   Modern course-platform look: indigo/violet gradients,
   glassmorphic cards, bold icons, dark mode.
   ============================================================ */

:root {
  --indigo:#4F46E5;
  --violet:#8B5CF6;
  --sky:#0EA5E9;
  --pink:#EC4899;
  --amber:#F59E0B;
  --green:#10B981;
  --red:#EF4444;

  --bg:#F4F3FF;
  --bg-2:#EEF1FF;
  --surface:rgba(255,255,255,.66);
  --surface-solid:#ffffff;
  --surface-2:rgba(255,255,255,.45);
  --ink:#1F1B3A;
  --ink-soft:#3B3560;
  --muted:#635F82;
  --border:rgba(255,255,255,.75);
  --border-soft:rgba(79,70,229,.14);
  --shadow:0 12px 34px rgba(49,40,120,.10);
  --shadow-lg:0 24px 60px rgba(49,40,120,.16);
  --radius:18px;
  --radius-sm:12px;
  --grad:linear-gradient(135deg,#4F46E5 0%,#7C3AED 55%,#0EA5E9 100%);
  --grad-soft:linear-gradient(135deg,rgba(79,70,229,.12),rgba(139,92,246,.12));
  --sidebar-w:268px;
  --blur:blur(20px) saturate(180%);
}

html[data-theme="dark"] {
  --bg:#0D0E1B;
  --bg-2:#141530;
  --surface:rgba(30,31,58,.62);
  --surface-solid:#1A1B33;
  --surface-2:rgba(255,255,255,.045);
  --ink:#EEECFF;
  --ink-soft:#CFCBE8;
  --muted:#A6A2C6;
  --border:rgba(255,255,255,.10);
  --border-soft:rgba(255,255,255,.10);
  --shadow:0 12px 34px rgba(0,0,0,.35);
  --shadow-lg:0 26px 60px rgba(0,0,0,.5);
  --grad-soft:linear-gradient(135deg,rgba(99,102,241,.22),rgba(139,92,246,.18));
}

* { box-sizing:border-box; }
html,body { margin:0; padding:0; }
body {
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
h1,h2,h3,h4 { font-weight:800; letter-spacing:-.02em; margin:0 0 .35em; line-height:1.2; }
h1 { font-size:1.85rem; }
h2 { font-size:1.35rem; }
h3 { font-size:1.1rem; }
h4 { font-size:.95rem; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); }
p { margin:0 0 .9em; }
a { color:var(--indigo); text-decoration:none; }
a:hover { text-decoration:underline; }
img { max-width:100%; }
.ic { flex:0 0 auto; vertical-align:middle; }
.muted { color:var(--muted); }
.small { font-size:.85rem; }
.center { text-align:center; }
.right { text-align:right; }
.nowrap { white-space:nowrap; }
.mt0{margin-top:0}.mt1{margin-top:8px}.mt2{margin-top:16px}.mt3{margin-top:24px}.mt4{margin-top:36px}
.mb0{margin-bottom:0}.mb1{margin-bottom:8px}.mb2{margin-bottom:16px}.mb3{margin-bottom:24px}.mb4{margin-bottom:36px}
.row-gap { display:flex; gap:12px; flex-wrap:wrap; align-items:center; }
.row-between { display:flex; justify-content:space-between; align-items:center; gap:16px; flex-wrap:wrap; }
.stack { display:flex; flex-direction:column; gap:6px; }
.hidden { display:none !important; }
.only-mobile { display:none; }
strong { font-weight:700; }

/* ---------------- background orbs ---------------- */
.bg-orbs { position:fixed; inset:0; overflow:hidden; pointer-events:none; z-index:0; }
.orb { position:absolute; border-radius:50%; filter:blur(70px); opacity:.5; }
.orb.o1 { width:520px;height:520px; background:#A5B4FC; top:-160px; left:-120px; }
.orb.o2 { width:440px;height:440px; background:#F0ABFC; top:12%; right:-140px; opacity:.38; }
.orb.o3 { width:520px;height:520px; background:#7DD3FC; bottom:-180px; left:22%; opacity:.35; }
.orb.o4 { width:360px;height:360px; background:#C4B5FD; top:55%; right:18%; opacity:.3; }
html[data-theme="dark"] .orb { opacity:.24; }

/* ---------------- shell ---------------- */
.main { position:relative; z-index:1; padding:26px 34px 60px; margin-left:var(--sidebar-w); min-height:calc(100vh - 40px); }
.public-main { margin-left:0; padding:34px 26px 60px; max-width:1220px; margin-right:auto; margin-left:auto; }

.sidebar {
  position:fixed; top:0; left:0; bottom:0; width:var(--sidebar-w);
  background:var(--surface); backdrop-filter:var(--blur); -webkit-backdrop-filter:var(--blur);
  border-right:1px solid var(--border);
  padding:20px 16px; overflow-y:auto; z-index:40;
  display:flex; flex-direction:column; gap:16px;
}
.brand-link { display:flex; align-items:center; gap:12px; text-decoration:none; color:inherit; }
.brand-text { display:flex; flex-direction:column; line-height:1.2; }
.brand-text strong { font-size:.98rem; }
.brand-text small { color:var(--muted); font-size:.72rem; letter-spacing:.04em; text-transform:uppercase; }
.brand-img { border-radius:12px; object-fit:cover; }
.sidebar-profile {
  display:flex; align-items:center; gap:11px; padding:11px 12px;
  background:var(--grad-soft); border:1px solid var(--border); border-radius:var(--radius-sm);
}
.sp-meta { display:flex; flex-direction:column; line-height:1.25; overflow:hidden; }
.sp-meta strong { font-size:.9rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.sp-meta small { color:var(--muted); font-size:.75rem; }
.avatar {
  width:40px;height:40px;border-radius:50%; flex:0 0 auto;
  background:var(--grad); color:#fff; display:inline-flex; align-items:center; justify-content:center;
  font-weight:700; background-size:cover; background-position:center; font-size:.95rem;
}
.avatar.sm { width:32px;height:32px;font-size:.82rem; }
.avatar.lg { width:84px;height:84px;font-size:2rem; }
.avatar.xl { width:120px;height:120px;font-size:2.6rem; }

.nav { display:flex; flex-direction:column; gap:3px; flex:1; }
.nav-item {
  display:flex; align-items:center; gap:11px; padding:9px 12px; border-radius:11px;
  color:var(--ink-soft); font-size:.9rem; font-weight:500; text-decoration:none; transition:.16s;
}
.nav-item:hover { background:var(--surface-2); text-decoration:none; transform:translateX(2px); }
.nav-item.active { background:var(--grad); color:#fff; box-shadow:0 8px 20px rgba(79,70,229,.32); }
.nav-item.active .ic { color:#fff; }
.nav-item.danger { color:var(--red); }
.sidebar-foot { display:flex; flex-direction:column; gap:3px; border-top:1px solid var(--border-soft); padding-top:10px; }
.sidebar-overlay { display:none; }

/* ---------------- topbar ---------------- */
.topbar {
  display:flex; align-items:center; gap:14px; margin-bottom:26px;
  position:sticky; top:0; z-index:30; padding:12px 0;
}
.topsearch {
  flex:1; max-width:520px; display:flex; align-items:center; gap:10px; padding:10px 15px;
  background:var(--surface); backdrop-filter:var(--blur); -webkit-backdrop-filter:var(--blur);
  border:1px solid var(--border); border-radius:14px; box-shadow:var(--shadow); color:var(--muted);
}
.topsearch input { border:0; background:transparent; outline:0; color:var(--ink); width:100%; font-size:.92rem; font-family:inherit; }
.topbar-right { margin-left:auto; display:flex; align-items:center; gap:9px; }
.icon-btn {
  width:42px;height:42px;border-radius:13px;border:1px solid var(--border);
  background:var(--surface); backdrop-filter:var(--blur); color:var(--ink-soft);
  display:inline-flex; align-items:center; justify-content:center; cursor:pointer; position:relative; transition:.16s;
}
.icon-btn:hover { transform:translateY(-1px); color:var(--indigo); box-shadow:var(--shadow); }
.bell .dot {
  position:absolute; top:-5px; right:-5px; background:var(--red); color:#fff; font-size:.66rem; font-weight:700;
  min-width:19px; height:19px; border-radius:10px; display:flex; align-items:center; justify-content:center; padding:0 4px;
  border:2px solid var(--bg);
}
.ic-moon { display:none; }
html[data-theme="dark"] .ic-sun { display:none; }
html[data-theme="dark"] .ic-moon { display:inline; }
.user-menu { position:relative; }
.user-btn {
  display:flex; align-items:center; gap:9px; padding:5px 13px 5px 5px; border-radius:14px;
  border:1px solid var(--border); background:var(--surface); backdrop-filter:var(--blur);
  cursor:pointer; font-family:inherit; color:var(--ink); font-weight:600; font-size:.88rem;
}
.um-name { max-width:90px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.user-drop {
  position:absolute; right:0; top:calc(100% + 10px); min-width:232px; padding:8px;
  background:var(--surface-solid); border:1px solid var(--border-soft); border-radius:var(--radius-sm);
  box-shadow:var(--shadow-lg); display:none; z-index:60;
}
.user-drop.open { display:block; }
.user-drop a { display:flex; align-items:center; gap:10px; padding:9px 11px; border-radius:9px; color:var(--ink-soft); font-size:.88rem; font-weight:500; }
.user-drop a:hover { background:var(--surface-2); text-decoration:none; }
.user-drop a.danger { color:var(--red); }
.ud-head { padding:8px 11px 12px; border-bottom:1px solid var(--border-soft); margin-bottom:6px; display:flex; flex-direction:column; }
.ud-head small { color:var(--muted); font-size:.78rem; }

/* ---------------- public nav ---------------- */
.pub-nav {
  position:sticky; top:0; z-index:35; padding:12px 26px;
  background:var(--surface); backdrop-filter:var(--blur); -webkit-backdrop-filter:var(--blur);
  border-bottom:1px solid var(--border);
}
.pub-inner { display:flex; align-items:center; gap:22px; max-width:1220px; margin:0 auto; }
.pub-links { display:flex; gap:6px; margin-left:12px; }
.pub-links a { padding:8px 14px; border-radius:10px; color:var(--ink-soft); font-weight:600; font-size:.9rem; }
.pub-links a:hover { background:var(--surface-2); text-decoration:none; }
.pub-links a.active { background:var(--grad-soft); color:var(--indigo); }
.pub-actions { margin-left:auto; display:flex; align-items:center; gap:9px; }

/* ---------------- cards ---------------- */
.card {
  background:var(--surface); backdrop-filter:var(--blur); -webkit-backdrop-filter:var(--blur);
  border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow);
  padding:22px; margin-bottom:22px;
}
.card.tight { padding:16px; }
.card.flat { box-shadow:none; }
.card-head { display:flex; align-items:center; justify-content:space-between; gap:14px; margin-bottom:16px; flex-wrap:wrap; }
.card-head h2, .card-head h3 { margin:0; }
.card-desc { color:var(--muted); font-size:.9rem; }

.grid { display:grid; gap:20px; }
.grid.cols-2 { grid-template-columns:repeat(auto-fit,minmax(320px,1fr)); }
.grid.cols-3 { grid-template-columns:repeat(auto-fit,minmax(270px,1fr)); }
.grid.cols-4 { grid-template-columns:repeat(auto-fit,minmax(215px,1fr)); }
.grid.cols-5 { grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); }
.split { display:grid; grid-template-columns:1.65fr 1fr; gap:22px; align-items:start; }
.split-even { display:grid; grid-template-columns:1fr 1fr; gap:22px; align-items:start; }
@media (max-width:1000px){ .split,.split-even { grid-template-columns:1fr; } }

/* stat tiles */
.stat {
  background:var(--surface); backdrop-filter:var(--blur); border:1px solid var(--border);
  border-radius:var(--radius); padding:18px 20px; box-shadow:var(--shadow); display:flex; gap:14px; align-items:center;
}
.stat .stat-ic {
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;color:#fff;flex:0 0 auto;
}
.stat .stat-ic.g1 { background:linear-gradient(135deg,#4F46E5,#818CF8); }
.stat .stat-ic.g2 { background:linear-gradient(135deg,#8B5CF6,#C4B5FD); }
.stat .stat-ic.g3 { background:linear-gradient(135deg,#0EA5E9,#67E8F9); }
.stat .stat-ic.g4 { background:linear-gradient(135deg,#F59E0B,#FCD34D); }
.stat .stat-ic.g5 { background:linear-gradient(135deg,#10B981,#6EE7B7); }
.stat .stat-ic.g6 { background:linear-gradient(135deg,#EC4899,#F9A8D4); }
.stat .stat-num { font-size:1.6rem; font-weight:800; line-height:1.1; }
.stat .stat-lab { color:var(--muted); font-size:.83rem; }

/* course card */
.course-card {
  background:var(--surface); backdrop-filter:var(--blur); border:1px solid var(--border);
  border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); display:flex; flex-direction:column; transition:.2s;
}
.course-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.course-thumb { height:150px; background:var(--grad); position:relative; display:flex; align-items:center; justify-content:center; color:#fff; }
.course-thumb.t2 { background:linear-gradient(135deg,#0EA5E9,#6366F1); }
.course-thumb.t3 { background:linear-gradient(135deg,#F59E0B,#EC4899); }
.course-thumb.t4 { background:linear-gradient(135deg,#10B981,#0EA5E9); }
.course-thumb img { width:100%;height:100%;object-fit:cover; }
.course-thumb .th-ic { opacity:.9; }
.course-body { padding:18px; display:flex; flex-direction:column; gap:9px; flex:1; }
.course-body h3 { margin:0; font-size:1.02rem; }
.course-meta { display:flex; gap:12px; flex-wrap:wrap; color:var(--muted); font-size:.8rem; align-items:center; }
.course-foot { margin-top:auto; display:flex; align-items:center; justify-content:space-between; gap:12px; padding-top:6px; }
.price { font-weight:800; color:var(--indigo); }

.chip {
  display:inline-flex; align-items:center; gap:6px; padding:4px 11px; border-radius:999px;
  font-size:.76rem; font-weight:600; background:var(--surface-2); border:1px solid var(--border-soft); color:var(--ink-soft);
}
.chip.solid { background:var(--grad); color:#fff; border-color:transparent; }
.badge { display:inline-block; padding:3px 10px; border-radius:999px; font-size:.75rem; font-weight:700; }
.badge-success { background:rgba(16,185,129,.16); color:#0d9668; }
.badge-info { background:rgba(14,165,233,.16); color:#0369a1; }
.badge-warning { background:rgba(245,158,11,.18); color:#b45309; }
.badge-danger { background:rgba(239,68,68,.16); color:#b91c1c; }
.badge-muted { background:var(--surface-2); color:var(--muted); }
html[data-theme="dark"] .badge-success { color:#6EE7B7; }
html[data-theme="dark"] .badge-info { color:#7DD3FC; }
html[data-theme="dark"] .badge-warning { color:#FCD34D; }
html[data-theme="dark"] .badge-danger { color:#FCA5A5; }

/* ---------------- buttons ---------------- */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:10px 18px; border-radius:12px; border:1px solid transparent; cursor:pointer;
  font-family:inherit; font-size:.9rem; font-weight:600; text-decoration:none; transition:.16s; line-height:1.2;
}
.btn:hover { text-decoration:none; transform:translateY(-1px); }
.btn-primary { background:var(--grad); color:#fff; box-shadow:0 10px 24px rgba(79,70,229,.30); }
.btn-primary:hover { box-shadow:0 14px 30px rgba(79,70,229,.4); }
.btn-ghost { background:var(--surface); border-color:var(--border); color:var(--ink-soft); }
.btn-ghost:hover { border-color:var(--indigo); color:var(--indigo); }
.btn-outline { background:transparent; border-color:var(--indigo); color:var(--indigo); }
.btn-danger { background:rgba(239,68,68,.12); color:#b91c1c; border-color:rgba(239,68,68,.3); }
.btn-success { background:rgba(16,185,129,.14); color:#0d9668; border-color:rgba(16,185,129,.3); }
.btn-sm { padding:7px 12px; font-size:.82rem; border-radius:10px; }
.btn-lg { padding:13px 26px; font-size:1rem; }
.btn-block { width:100%; }
.btn[disabled] { opacity:.55; cursor:not-allowed; transform:none; }
.btn-icon { padding:8px; width:36px; height:36px; }

/* ---------------- forms ---------------- */
label { display:block; font-weight:600; font-size:.86rem; margin-bottom:6px; color:var(--ink-soft); }
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],input[type=time],input[type=datetime-local],input[type=url],input[type=search],select,textarea {
  width:100%; padding:11px 14px; border-radius:12px; border:1px solid var(--border-soft);
  background:var(--surface-solid); color:var(--ink); font-family:inherit; font-size:.92rem; outline:none; transition:.16s;
}
html[data-theme="dark"] input,html[data-theme="dark"] select,html[data-theme="dark"] textarea { background:rgba(255,255,255,.05); }
input:focus,select:focus,textarea:focus { border-color:var(--indigo); box-shadow:0 0 0 4px rgba(79,70,229,.14); }
textarea { min-height:96px; resize:vertical; }
.form-group { margin-bottom:16px; }
.form-grid { display:grid; gap:16px; grid-template-columns:1fr 1fr; }
.form-grid.three { grid-template-columns:repeat(3,1fr); }
@media (max-width:820px){ .form-grid,.form-grid.three { grid-template-columns:1fr; } }
.form-hint { color:var(--muted); font-size:.79rem; margin-top:5px; }
.check { display:flex; align-items:center; gap:9px; font-weight:500; font-size:.9rem; color:var(--ink-soft); }
.check input { width:auto; }
.radio-row { display:flex; gap:16px; flex-wrap:wrap; }
.inline-form { display:flex; gap:10px; flex-wrap:wrap; align-items:flex-end; }
.inline-form .form-group { margin-bottom:0; }

/* ---------------- tables ---------------- */
.table-wrap { overflow-x:auto; border-radius:var(--radius-sm); }
table.data { width:100%; border-collapse:collapse; font-size:.88rem; }
table.data th {
  text-align:left; padding:12px 14px; font-size:.76rem; text-transform:uppercase; letter-spacing:.06em;
  color:var(--muted); border-bottom:1px solid var(--border-soft); white-space:nowrap;
}
table.data td { padding:12px 14px; border-bottom:1px solid var(--border-soft); vertical-align:middle; }
table.data tr:last-child td { border-bottom:0; }
table.data tbody tr:hover { background:var(--surface-2); }
table.data td.actions { white-space:nowrap; display:flex; gap:6px; }
.tbl-student { display:flex; align-items:center; gap:10px; }

/* ---------------- progress ---------------- */
.progress { height:9px; border-radius:999px; background:var(--surface-2); overflow:hidden; border:1px solid var(--border-soft); }
.progress > span { display:block; height:100%; background:var(--grad); border-radius:999px; transition:width .4s; }
.progress.thin { height:6px; }
.progress-lab { display:flex; justify-content:space-between; font-size:.78rem; color:var(--muted); margin-bottom:6px; }

.ring { --p:0; width:112px; height:112px; border-radius:50%; display:grid; place-items:center; position:relative;
  background:conic-gradient(var(--indigo) calc(var(--p) * 1%), rgba(120,120,170,.18) 0); }
.ring::after { content:''; position:absolute; inset:10px; border-radius:50%; background:var(--surface-solid); }
.ring b { position:relative; z-index:1; font-size:1.4rem; }

/* ---------------- flash, empty, misc ---------------- */
.flash-wrap { display:flex; flex-direction:column; gap:10px; margin-bottom:20px; }
.flash {
  display:flex; align-items:center; gap:11px; padding:13px 17px; border-radius:14px; font-size:.9rem; font-weight:500;
  background:var(--surface); border:1px solid var(--border); box-shadow:var(--shadow);
}
.flash-success { border-left:4px solid var(--green); color:#0d9668; }
.flash-warning { border-left:4px solid var(--amber); color:#b45309; }
.flash-danger { border-left:4px solid var(--red); color:#b91c1c; }
.flash-info { border-left:4px solid var(--sky); color:#0369a1; }
.empty { text-align:center; padding:44px 20px; color:var(--muted); display:flex; flex-direction:column; align-items:center; gap:12px; }
.page-head { display:flex; justify-content:space-between; align-items:flex-end; gap:18px; margin-bottom:24px; flex-wrap:wrap; }
.page-head h1 { margin:0; }
.page-head p { margin:4px 0 0; }
.page-actions { display:flex; gap:10px; flex-wrap:wrap; }
.pager { display:flex; align-items:center; gap:14px; margin-top:18px; flex-wrap:wrap; }
.pager-info { color:var(--muted); font-size:.84rem; }
.denied-card { max-width:520px; margin:60px auto; text-align:center; }
.denied-ic { width:76px;height:76px;border-radius:24px; background:var(--grad-soft); color:var(--indigo); display:grid; place-items:center; margin:0 auto 16px; }

/* hero */
.hero { position:relative; overflow:hidden; border-radius:26px; padding:46px 44px; margin-bottom:34px; color:#fff; background:var(--grad); box-shadow:var(--shadow-lg); }
.hero::after { content:''; position:absolute; width:420px;height:420px; border-radius:50%; background:rgba(255,255,255,.13); top:-160px; right:-90px; }
.hero h1 { font-size:2.5rem; color:#fff; max-width:720px; }
.hero p { font-size:1.05rem; opacity:.94; max-width:640px; }
.hero .hero-actions { display:flex; gap:12px; flex-wrap:wrap; margin-top:22px; position:relative; z-index:2; }
.hero .btn-ghost { background:rgba(255,255,255,.2); border-color:rgba(255,255,255,.35); color:#fff; }
.hero .btn-light { background:#fff; color:var(--indigo); }
.hero-stats { display:flex; gap:34px; margin-top:30px; flex-wrap:wrap; position:relative; z-index:2; }
.hero-stats div b { display:block; font-size:1.6rem; }
.hero-stats div span { opacity:.85; font-size:.85rem; }
.section-title { display:flex; justify-content:space-between; align-items:flex-end; gap:16px; margin:38px 0 20px; }
.section-title h2 { margin:0; }

/* banner strip */
.banner-strip { display:flex; gap:20px; overflow-x:auto; padding-bottom:6px; }
.banner-item { min-width:320px; flex:1; }

/* lesson list */
.lesson-item {
  display:flex; align-items:center; gap:13px; padding:13px 15px; border-radius:14px;
  background:var(--surface-2); border:1px solid var(--border-soft); text-decoration:none; color:inherit; transition:.16s;
}
.lesson-item:hover { border-color:var(--indigo); text-decoration:none; transform:translateX(3px); }
.lesson-item.done { border-left:4px solid var(--green); }
.lesson-item.active { background:var(--grad-soft); border-color:var(--indigo); }
.lesson-ic { width:38px;height:38px;border-radius:11px; display:grid; place-items:center; color:#fff; background:var(--grad); flex:0 0 auto; }
.lesson-ic.video{background:linear-gradient(135deg,#EC4899,#F472B6)}
.lesson-ic.pdf{background:linear-gradient(135deg,#EF4444,#FB923C)}
.lesson-ic.audio{background:linear-gradient(135deg,#8B5CF6,#6366F1)}
.lesson-ic.teks{background:linear-gradient(135deg,#0EA5E9,#38BDF8)}
.lesson-meta { display:flex; flex-direction:column; }
.lesson-meta strong { font-size:.92rem; }
.lesson-meta small { color:var(--muted); font-size:.78rem; }

.module-block { border:1px solid var(--border-soft); border-radius:var(--radius-sm); padding:16px; margin-bottom:16px; background:var(--surface-2); }
.module-block > header { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:12px; flex-wrap:wrap; }
.module-block h3 { margin:0; font-size:1rem; }
.lesson-stack { display:flex; flex-direction:column; gap:9px; }

.media-frame { position:relative; border-radius:var(--radius); overflow:hidden; background:#0b0b18; margin-bottom:20px; }
.media-frame iframe, .media-frame video { width:100%; aspect-ratio:16/9; border:0; display:block; }
.media-frame audio { width:100%; padding:22px; }
.reading { font-size:1.02rem; line-height:1.8; }
.reading h2,.reading h3 { margin-top:1.4em; }

/* quiz */
.quiz-head { position:sticky; top:0; z-index:20; }
.timer {
  display:inline-flex; align-items:center; gap:9px; padding:9px 16px; border-radius:13px; font-weight:800;
  background:var(--grad-soft); border:1px solid var(--border); font-variant-numeric:tabular-nums;
}
.timer.warn { background:rgba(245,158,11,.18); color:#b45309; }
.timer.danger { background:rgba(239,68,68,.16); color:#b91c1c; animation:pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity:.6; } }
.q-block { border:1px solid var(--border-soft); border-radius:var(--radius-sm); padding:18px; margin-bottom:16px; background:var(--surface); }
.q-num { display:inline-flex; align-items:center; gap:8px; font-weight:700; font-size:.82rem; color:var(--indigo); margin-bottom:10px; }
.q-text { font-weight:600; font-size:1.02rem; margin-bottom:14px; }
.opt {
  display:flex; align-items:center; gap:12px; padding:12px 15px; border-radius:12px; border:1px solid var(--border-soft);
  background:var(--surface-solid); cursor:pointer; margin-bottom:9px; transition:.14s; font-size:.93rem;
}
.opt:hover { border-color:var(--indigo); background:var(--surface-2); }
.opt input { width:auto; margin:0; }
.opt.sel { border-color:var(--indigo); background:var(--grad-soft); }
.opt.correct { border-color:var(--green); background:rgba(16,185,129,.1); }
.opt.wrong { border-color:var(--red); background:rgba(239,68,68,.09); }
.qnav { display:flex; flex-wrap:wrap; gap:8px; }
.qnav a, .qnav button {
  width:38px;height:38px;border-radius:11px; border:1px solid var(--border-soft); background:var(--surface-solid);
  display:grid; place-items:center; font-weight:700; font-size:.85rem; color:var(--ink-soft); cursor:pointer; text-decoration:none;
}
.qnav .answered { background:var(--grad); color:#fff; border-color:transparent; }
.qnav .current { outline:2px solid var(--indigo); outline-offset:1px; }
.autosave-note { font-size:.78rem; color:var(--muted); display:flex; align-items:center; gap:6px; }
.saved-yes { color:var(--green); }
.essay-box textarea { min-height:150px; }

/* forum / comments */
.topic { display:flex; gap:14px; padding:16px; border-radius:var(--radius-sm); border:1px solid var(--border-soft); background:var(--surface-2); margin-bottom:12px; }
.topic-main { flex:1; }
.topic h3 { margin:0 0 5px; font-size:1rem; }
.post { display:flex; gap:13px; padding:15px 0; border-bottom:1px solid var(--border-soft); }
.post:last-child { border-bottom:0; }
.post-body { flex:1; }
.post-meta { display:flex; gap:10px; align-items:center; font-size:.79rem; color:var(--muted); margin-bottom:5px; flex-wrap:wrap; }
.reply-box { display:flex; gap:12px; margin-top:18px; align-items:flex-start; }

/* calendar */
.cal-grid { display:grid; grid-template-columns:repeat(7,1fr); gap:8px; }
.cal-head { text-align:center; font-size:.76rem; font-weight:700; color:var(--muted); text-transform:uppercase; letter-spacing:.06em; padding-bottom:6px; }
.cal-day { min-height:96px; border-radius:12px; border:1px solid var(--border-soft); background:var(--surface-2); padding:8px; font-size:.78rem; }
.cal-day.empty-day { opacity:.35; }
.cal-day.today { border-color:var(--indigo); box-shadow:0 0 0 3px rgba(79,70,229,.13); }
.cal-date { font-weight:700; margin-bottom:5px; }
.cal-ev { background:var(--grad); color:#fff; border-radius:7px; padding:3px 7px; font-size:.72rem; margin-bottom:4px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.cal-ev.t-tugas { background:linear-gradient(135deg,#EC4899,#F472B6); }
.cal-ev.t-belajar { background:linear-gradient(135deg,#0EA5E9,#38BDF8); }
.cal-ev.t-ujian { background:linear-gradient(135deg,#F59E0B,#FBBF24); }

/* certificate */
.cert {
  background:#fffdf7; color:#241a08; border:10px double #8b6b2e; border-radius:14px; padding:46px 44px; text-align:center; position:relative;
}
.cert-inner { border:2px solid #c9a349; border-radius:8px; padding:34px 26px; }
.cert h2 { font-family:'Cormorant Garamond',Georgia,serif; font-size:2.3rem; letter-spacing:.06em; text-transform:uppercase; color:#6b4f14; margin:6px 0 14px; }
.cert .cert-name { font-family:'Cormorant Garamond',Georgia,serif; font-size:2.1rem; border-bottom:2px solid #c9a349; display:inline-block; padding:0 26px 6px; margin:12px 0 16px; }
.cert .cert-course { font-size:1.15rem; font-weight:700; }
.cert .cert-num { font-family:monospace; letter-spacing:.1em; color:#6b4f14; margin-top:20px; }
.cert-foot { display:flex; justify-content:space-between; align-items:flex-end; margin-top:36px; gap:20px; text-align:left; }
.cert-foot .sig { border-top:1.6px solid #6b4f14; padding-top:7px; font-size:.86rem; min-width:210px; text-align:center; }
.cert-seal { width:104px;height:104px; border-radius:50%; border:3px solid #8b6b2e; display:grid; place-items:center; color:#8b6b2e; font-weight:700; font-size:.72rem; text-align:center; padding:8px; }
@media print {
  .sidebar,.topbar,.site-foot,.pub-nav,.no-print,.bg-orbs { display:none !important; }
  .main { margin:0; padding:0; }
  .cert { box-shadow:none; border-radius:0; }
  body { background:#fff; }
}

/* tabs */
.tabs { display:flex; gap:6px; border-bottom:1px solid var(--border-soft); margin-bottom:20px; flex-wrap:wrap; }
.tab { padding:10px 16px; border-radius:11px 11px 0 0; font-weight:600; font-size:.88rem; color:var(--muted); cursor:pointer; border:1px solid transparent; border-bottom:0; background:transparent; font-family:inherit; }
.tab.active { background:var(--surface); color:var(--indigo); border-color:var(--border-soft); }
.tab-panel { display:none; }
.tab-panel.active { display:block; }

/* modal */
.modal-back { position:fixed; inset:0; background:rgba(20,16,50,.5); backdrop-filter:blur(4px); display:none; z-index:80; padding:24px; overflow-y:auto; }
.modal-back.open { display:flex; align-items:flex-start; justify-content:center; }
.modal { background:var(--surface-solid); border-radius:var(--radius); border:1px solid var(--border-soft); box-shadow:var(--shadow-lg); padding:24px; width:100%; max-width:640px; margin:auto; }
.modal-head { display:flex; justify-content:space-between; align-items:center; gap:14px; margin-bottom:18px; }
.modal-head h3 { margin:0; }

/* banner / announcement */
.notice { display:flex; gap:13px; padding:15px; border-radius:var(--radius-sm); background:var(--grad-soft); border:1px solid var(--border-soft); margin-bottom:12px; }
.notice-ic { width:36px;height:36px;border-radius:11px;background:var(--grad);color:#fff;display:grid;place-items:center;flex:0 0 auto; }
.notice h4 { margin:0 0 3px; text-transform:none; letter-spacing:0; font-size:.94rem; color:var(--ink); }
.notice p { margin:0; font-size:.87rem; color:var(--ink-soft); }

/* footer */
.site-foot { position:relative; z-index:1; margin-top:56px; border-top:1px solid var(--border); background:var(--surface); backdrop-filter:var(--blur); padding:38px 34px 20px; }
.foot-inner { max-width:1220px; margin:0 auto; display:grid; grid-template-columns:1.2fr 2fr; gap:34px; }
.foot-brand { display:flex; gap:14px; align-items:flex-start; }
.foot-brand p { color:var(--muted); font-size:.88rem; margin:4px 0 0; }
.foot-cols { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.foot-cols div { display:flex; flex-direction:column; gap:7px; }
.foot-cols h4 { margin:0 0 5px; }
.foot-cols a, .foot-cols span { color:var(--muted); font-size:.86rem; }
.foot-bottom { max-width:1220px; margin:26px auto 0; padding-top:16px; border-top:1px solid var(--border-soft); display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap; color:var(--muted); font-size:.8rem; }
body.has-sidebar .site-foot { margin-left:var(--sidebar-w); }

/* auth pages */
.auth-wrap { max-width:460px; margin:44px auto; }
.auth-card { padding:32px; }
.auth-card h1 { font-size:1.6rem; }
.auth-logo { display:flex; flex-direction:column; align-items:center; gap:10px; margin-bottom:22px; text-align:center; }
.auth-foot { text-align:center; margin-top:18px; font-size:.88rem; color:var(--muted); }
.dark-box { background:var(--grad-soft); border:1px dashed var(--border-soft); border-radius:var(--radius-sm); padding:14px; font-size:.84rem; }

/* misc lists */
.kv { display:grid; grid-template-columns:auto 1fr; gap:9px 18px; font-size:.9rem; }
.kv dt { color:var(--muted); }
.kv dd { margin:0; font-weight:600; }
.toolbar { display:flex; gap:10px; flex-wrap:wrap; align-items:flex-end; margin-bottom:18px; }
.toolbar .form-group { margin:0; }
.divider { height:1px; background:var(--border-soft); margin:20px 0; }
.drag-list { display:flex; flex-direction:column; gap:8px; }
.hl { background:linear-gradient(transparent 62%, rgba(139,92,246,.32) 0); }
.leader-row { display:flex; align-items:center; gap:14px; padding:12px 15px; border-radius:14px; border:1px solid var(--border-soft); background:var(--surface-2); margin-bottom:10px; }
.leader-rank { width:34px;height:34px;border-radius:11px; display:grid; place-items:center; font-weight:800; background:var(--grad-soft); color:var(--indigo); }
.leader-row.top1 { border-color:#F59E0B; background:rgba(245,158,11,.1); }
.leader-row.top1 .leader-rank { background:linear-gradient(135deg,#F59E0B,#FCD34D); color:#fff; }
.leader-row.top2 .leader-rank { background:linear-gradient(135deg,#94A3B8,#CBD5E1); color:#fff; }
.leader-row.top3 .leader-rank { background:linear-gradient(135deg,#B45309,#D97706); color:#fff; }
.scroll-y { max-height:420px; overflow-y:auto; padding-right:4px; }

/* tabs of question builder */
.q-row { display:grid; grid-template-columns:28px 1fr auto; gap:9px; align-items:center; margin-bottom:8px; }
.q-row .opt-key { font-weight:700; color:var(--muted); }

@media (max-width:980px) {
  :root { --sidebar-w:0px; }
  .only-mobile { display:inline-flex; }
  .sidebar { transform:translateX(-105%); transition:transform .25s; width:280px; box-shadow:var(--shadow-lg); }
  .sidebar.open { transform:translateX(0); }
  .sidebar-overlay { display:none; position:fixed; inset:0; background:rgba(20,16,50,.45); z-index:39; }
  .sidebar-overlay.open { display:block; }
  .main { margin-left:0; padding:18px 16px 50px; }
  body.has-sidebar .site-foot { margin-left:0; }
  .foot-inner { grid-template-columns:1fr; }
  .foot-cols { grid-template-columns:1fr 1fr; }
  .hero { padding:30px 24px; }
  .hero h1 { font-size:1.75rem; }
  .pub-links, .um-name { display:none; }
  body.is-public .pub-inner { flex-wrap:wrap; }
  .cal-day { min-height:74px; }
}