/* LabBahasa — Design System (mandiri, tanpa dependensi eksternal) */
:root{
  --blue:#2563eb; --blue-d:#1d4ed8; --violet:#7c3aed; --ink:#0f172a; --muted:#64748b;
  --bg:#f1f5f9; --card:#ffffff; --line:#e2e8f0; --ok:#16a34a; --warn:#d97706; --bad:#dc2626;
  --radius:14px; --shadow:0 6px 24px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .4em;line-height:1.25}
img{max-width:100%}

/* Layout */
.app{display:flex;min-height:100vh}
.sidebar{width:248px;background:linear-gradient(180deg,#0f172a,#1e293b);color:#cbd5e1;flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{padding:20px 20px 14px;color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;gap:8px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand small{display:block;font-weight:400;font-size:11px;opacity:.7}
.nav{padding:12px 10px;display:flex;flex-direction:column;gap:2px}
.nav a{color:#cbd5e1;padding:10px 14px;border-radius:9px;display:flex;align-items:center;gap:10px;font-size:14px}
.nav a:hover{background:rgba(255,255,255,.07);text-decoration:none;color:#fff}
.nav a.active{background:var(--blue);color:#fff}
.nav .sec{font-size:11px;text-transform:uppercase;letter-spacing:.6px;opacity:.5;padding:14px 14px 4px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{background:var(--card);border-bottom:1px solid var(--line);padding:12px 24px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20}
.topbar .who{font-size:13px;color:var(--muted)}
.content{padding:24px;max-width:1200px;width:100%;margin:0 auto}
.menu-btn{display:none;background:none;border:0;font-size:24px;cursor:pointer}

/* Cards & grid */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:18px}
.card h2,.card h3{margin-top:0}
.grid{display:grid;gap:16px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.stat .n{font-size:30px;font-weight:800;color:var(--blue)}
.stat .l{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:9px;border:1px solid transparent;background:var(--blue);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:.15s}
.btn:hover{background:var(--blue-d);text-decoration:none;color:#fff}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{background:#f8fafc}
.btn.violet{background:var(--violet)}.btn.violet:hover{background:#6d28d9}
.btn.sm{padding:5px 11px;font-size:12.5px}
.btn.danger{background:var(--bad)}.btn.danger:hover{background:#b91c1c}
.btn.ok{background:var(--ok)}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}

/* Forms */
label{display:block;font-weight:600;font-size:13.5px;margin:12px 0 4px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14.5px;font-family:inherit;background:#fff}
input:focus,select:focus,textarea:focus{outline:2px solid #bfdbfe;border-color:var(--blue)}
textarea{min-height:90px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.help{font-size:12px;color:var(--muted);margin-top:3px}

/* Table */
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);background:#f8fafc}
tr:hover td{background:#f8fafc}

/* Badges */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:11.5px;font-weight:700}
.badge.blue{background:#dbeafe;color:#1e40af}.badge.violet{background:#ede9fe;color:#6d28d9}
.badge.green{background:#dcfce7;color:#166534}.badge.gray{background:#f1f5f9;color:#475569}
.badge.amber{background:#fef3c7;color:#92400e}

/* Alerts */
.alert{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-size:14px}
.alert.success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}
.alert.danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.alert.info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}
.alert.warning{background:#fffbeb;color:#92400e;border:1px solid #fde68a}

/* Speak button & vocab */
.speak{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:var(--blue);color:#fff;border:0;cursor:pointer;font-size:17px;flex-shrink:0;transition:.15s}
.speak:hover{background:var(--blue-d);transform:scale(1.07)}
.speak.playing{background:var(--violet);animation:pulse 1s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(124,58,237,.5)}50%{box-shadow:0 0 0 8px rgba(124,58,237,0)}}
.vocab-item{display:flex;align-items:center;gap:14px;padding:14px;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:#fff}
.vocab-item .term{font-size:20px;font-weight:700}
.vocab-item .phon{color:var(--violet);font-size:13px}
.vocab-item .tr{color:var(--muted);font-size:14px}
.vocab-item .ex{font-size:13px;color:#475569;margin-top:3px}
.rtl{direction:rtl;text-align:right}
.term-xl{font-size:26px}

/* Lesson hero */
.hero{background:linear-gradient(135deg,var(--blue),var(--violet));color:#fff;border-radius:var(--radius);padding:26px;margin-bottom:20px}
.hero h1{color:#fff;margin:0}.hero .crumb{opacity:.85;font-size:13px;margin-bottom:6px}

/* Lang cards */
.lang-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.18s;text-align:center;color:var(--ink)}
.lang-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(15,23,42,.14);text-decoration:none}
.lang-card .flag{font-size:46px}
.lang-card .native{font-size:22px;font-weight:800;margin:6px 0 2px}
.lang-card .name{color:var(--muted);font-size:14px}

/* Progress bar */
.pbar{height:10px;background:#e2e8f0;border-radius:999px;overflow:hidden}
.pbar > span{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--violet))}

/* Accordion */
.acc{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:12px;background:#fff}
.acc summary{padding:14px 18px;font-weight:700;cursor:pointer;background:#f8fafc;list-style:none;display:flex;justify-content:space-between;align-items:center}
.acc summary::-webkit-details-marker{display:none}
.acc .inner{padding:8px 18px 16px}
.lesson-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:9px}
.lesson-link:hover{background:#eff6ff;text-decoration:none}
.lesson-link.done{color:var(--ok)}

.flex{display:flex;align-items:center;gap:12px}
.between{justify-content:space-between}
.muted{color:var(--muted)}
.mt{margin-top:16px}.mb{margin-bottom:16px}
.center{text-align:center}
.pill-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.pill-tabs a{padding:8px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:14px;font-weight:600}
.pill-tabs a.active{background:var(--blue);color:#fff;border-color:var(--blue)}

@media(max-width:860px){
 .sidebar{position:fixed;left:-260px;z-index:50;transition:.25s;box-shadow:0 0 40px rgba(0,0,0,.4)}
 .sidebar.open{left:0}
 .menu-btn{display:block}
 .grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}
 .form-row{grid-template-columns:1fr}
 .backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:40}
 .backdrop.show{display:block}
}
@media(max-width:560px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}}