/* ============================================================
   Vipvimo LMS - design system
   Layout theo mau AgentBoss, doi navy -> tim dam.
   Doi mau thuong hieu: sua duy nhat khoi :root ben duoi.
   ============================================================ */
:root{
  --purple-900:#2a1259;
  --purple-800:#371a70;
  --purple-700:#4c2494;
  --purple-600:#6d28d9;
  --purple-100:#ede4ff;

  --accent:#f97316;
  --accent-dark:#ea580c;
  --accent-soft:#fbc39a;
  --accent-tint:#fff1e6;

  --cream:#faf6f0;
  --card:#ffffff;
  --line:#e9e2d8;
  --line-soft:#f1ebe2;

  --ink:#161020;
  --ink-2:#3f3550;
  --muted:#8b8296;

  --ok:#15803d;
  --ok-bg:#eafaf0;
  --warn:#b45309;
  --danger:#b91c1c;

  --radius:14px;
  --radius-lg:20px;
  --shadow:0 1px 2px rgba(22,16,32,.04), 0 8px 24px rgba(22,16,32,.05);
  --wrap:1180px;
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--cream);color:var(--ink);
  font-family:var(--font);font-size:11.2px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
button{font-family:inherit}
[hidden]{display:none!important}

/* ---------- Topbar ---------- */
.topbar{background:var(--purple-900);color:#fff;position:sticky;top:0;z-index:50}
.topbar-in{max-width:var(--wrap);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;letter-spacing:-.02em;font-size:13.3px}
.brand-mark{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),#fb923c);color:#fff;font-weight:900;font-size:10.5px;
}
.plan-chip{
  font-size:8px;letter-spacing:.14em;font-weight:800;text-transform:uppercase;
  color:#cdbcf2;padding:4px 0;
}
.topbar-nav{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:9.8px}
.topbar-nav a{color:#e6dcff;text-decoration:none;display:flex;align-items:center;gap:7px;padding:6px 2px;border-radius:8px}
.topbar-nav a:hover{color:#fff}
.topbar-nav a.on{color:#fff;box-shadow:inset 0 -2px 0 var(--accent)}

/* ---------- Page ---------- */
.page{max-width:var(--wrap);margin:0 auto;padding:34px 24px 90px}
.page-narrow{max-width:860px}
.crumb{font-size:9.8px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
.eyebrow{color:var(--muted);font-size:10.5px;margin:0 0 6px}
h1{font-size:clamp(18px,1.9vw,24px);line-height:1.16;letter-spacing:-.02em;margin:0 0 18px;font-weight:800;text-wrap:balance}
h2{font-size:18.2px;letter-spacing:-.02em;margin:0 0 16px;font-weight:800}
h3{font-size:12.6px;margin:0 0 10px;font-weight:700}
.section-head{display:flex;align-items:baseline;gap:14px;margin:38px 0 16px;flex-wrap:wrap}
.section-head h2{color:var(--accent);margin:0;font-size:21px}
.section-head .range{color:var(--muted);font-size:10.5px}
.muted{color:var(--muted)}
.small{font-size:9.1px}

/* ---------- Progress ---------- */
.progress-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:6px}
.bar{height:9px;border-radius:999px;background:#e6ded3;overflow:hidden;margin-bottom:10px}
.bar > i{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .5s ease}
.done-flag{color:var(--accent-dark);font-weight:700;font-size:9.8px}

/* ---------- Card ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow)}
.card + .card{margin-top:20px}
.card-tight{padding:22px}

/* ---------- Badges ---------- */
.badge-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:18px;margin-top:18px}
.badge-item{border:1px solid var(--line);border-radius:var(--radius);padding:22px 14px;text-align:center;background:#fff}
.badge-item.locked{opacity:.62}
.badge-face{
  width:96px;height:96px;margin:0 auto 14px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(160deg,var(--purple-700),var(--purple-900));color:#fff;
  font-weight:900;font-size:9.1px;text-align:center;padding:8px;line-height:1.25;
  box-shadow:inset 0 0 0 3px rgba(255,255,255,.22);
}
.badge-item.locked .badge-face{background:#c9c2bb;color:#f4f1ec;filter:grayscale(1)}
.badge-name{font-weight:700;font-size:10.5px;margin-bottom:3px}
.badge-cond{font-size:9.1px;color:var(--muted)}

/* ---------- Lesson grid ---------- */
.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:16px}
.lesson-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  display:flex;flex-direction:column;min-height:158px;text-decoration:none;color:inherit;
  transition:border-color .15s, transform .15s, box-shadow .15s;
}
.lesson-card:hover{border-color:var(--accent-soft);transform:translateY(-2px);box-shadow:var(--shadow)}
.lesson-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;gap:8px}
.lesson-no{font-size:8.4px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:700}
.lesson-mark{font-size:10.5px;color:var(--accent)}
.lesson-title{font-weight:700;font-size:11.2px;line-height:1.35;margin-bottom:auto}
.lesson-state{font-size:8.4px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-top:14px}
.lesson-card.ready{border-color:var(--accent);border-width:2px;padding:17px}
.lesson-card.ready .lesson-state{color:var(--accent-dark)}
.lesson-card.locked{background:#f5f1ea;color:#9a9187}
.lesson-card.locked:hover{transform:none;border-color:var(--line);box-shadow:none}
.plan-tag{
  font-size:8px;font-weight:800;letter-spacing:.1em;padding:3px 7px;border-radius:6px;
  background:var(--purple-100);color:var(--purple-700);text-transform:uppercase;
}
.plan-tag.vip{background:#fef3c7;color:#92400e}
.plan-tag.svip{background:#fce7f3;color:#9d174d}
.plan-tag.tn{background:#dcfce7;color:#166534}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 30px;border-radius:12px;border:1px solid transparent;
  font-weight:700;font-size:11.2px;cursor:pointer;text-decoration:none;
  transition:background .15s,border-color .15s,opacity .15s;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-primary[disabled],.btn-primary.is-done{background:var(--accent-soft);cursor:default}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent-soft)}
.btn-purple{background:var(--purple-700);color:#fff}
.btn-purple:hover{background:var(--purple-800)}
.btn-sm{padding:9px 16px;font-size:9.8px;border-radius:10px}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:16px}

/* ---------- Lesson player ---------- */
.lesson-body{font-size:13.3px;line-height:1.72;color:var(--ink-2)}
.lesson-body p{margin:0 0 22px}
.lesson-body strong{color:var(--ink)}
.lesson-body ul,.lesson-body ol{margin:0 0 22px;padding-left:24px}
.lesson-body li{margin-bottom:9px}
.audio-wrap{background:var(--purple-900);border-radius:var(--radius);padding:18px 20px;margin-bottom:26px;color:#fff}
.audio-wrap .audio-label{font-size:9.1px;letter-spacing:.12em;text-transform:uppercase;color:#c3b1ec;font-weight:700;margin-bottom:10px}
.audio-wrap audio{width:100%}
.slides{margin-bottom:26px}
.slide-stage{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#f7f3ed}
.slide-stage img{width:100%;object-fit:contain;max-height:520px;margin:0 auto}
.slide-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}
.slide-caption{font-size:9.8px;color:var(--muted)}
.accordion{border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:26px 0}
.accordion summary{cursor:pointer;font-weight:700;font-size:11.9px;list-style:none;display:flex;justify-content:space-between;gap:12px}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{content:"\25be";color:var(--muted)}
.accordion[open] summary::after{content:"\25b4"}
.accordion .acc-body{padding-top:14px;font-size:11.2px;color:var(--ink-2)}
.divider{height:1px;background:var(--line);margin:26px 0}

/* ---------- Quiz ---------- */
.quiz-q{margin-bottom:28px}
.quiz-q h3{font-size:13.3px;line-height:1.45;margin-bottom:14px}
.opt{
  display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;
  border:1px solid var(--line);background:#fff;border-radius:12px;padding:14px 16px;
  margin-bottom:10px;cursor:pointer;font-size:11.2px;transition:border-color .12s,background .12s;
  color:var(--ink);
}
.opt:hover{border-color:var(--accent-soft)}
.opt .key{
  flex:0 0 26px;height:26px;border-radius:7px;background:var(--purple-100);color:var(--purple-700);
  display:grid;place-items:center;font-weight:800;font-size:9.1px;
}
.opt.sel{border-color:var(--accent);background:var(--accent-tint)}
.opt.correct{border-color:var(--ok);background:var(--ok-bg)}
.opt.wrong{border-color:var(--danger);background:#fef2f2}
.opt[disabled]{cursor:default}
.explain{font-size:10.5px;color:var(--ink-2);background:#f7f4ef;border-left:3px solid var(--accent);padding:12px 16px;border-radius:0 10px 10px 0;margin-top:6px}
.score-box{text-align:center;padding:14px 0 4px}
.score-num{font-size:36.4px;font-weight:900;letter-spacing:-.03em;line-height:1}
.score-num.pass{color:var(--ok)}
.score-num.fail{color:var(--danger)}

/* ---------- Forms ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:9.8px;font-weight:700;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:11px;
  font-size:11.2px;font-family:inherit;background:#fff;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--purple-600);outline-offset:1px;border-color:transparent}
.msg{padding:12px 16px;border-radius:11px;font-size:10.5px;margin-bottom:16px}
.msg.err{background:#fef2f2;color:var(--danger)}
.msg.ok{background:var(--ok-bg);color:var(--ok)}

/* ---------- Table ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;font-size:9.8px;min-width:760px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line-soft);white-space:nowrap}
th{background:#faf7f2;font-weight:700;font-size:8.4px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fcfaf7}
.pill{display:inline-block;font-size:8px;font-weight:800;padding:3px 9px;border-radius:999px;letter-spacing:.06em}
.pill.basic{background:#f1efec;color:#6b6459}
.pill.pro{background:var(--purple-100);color:var(--purple-700)}
.pill.vip{background:#fef3c7;color:#92400e}
.pill.svip{background:#fce7f3;color:#9d174d}
.pill.truyennghe{background:#dcfce7;color:#166534}

/* ---------- Stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(185px,1fr));gap:16px;margin-bottom:26px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.stat .k{font-size:8.4px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:8px}
.stat .v{font-size:21px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.stat .sub{font-size:9.1px;color:var(--muted);margin-top:4px}

/* ---------- Landing ---------- */
.hero{background:var(--purple-900);color:#fff;padding:52px 24px 58px}
.hero-in{max-width:var(--wrap);margin:0 auto}
.hero h1{color:#fff;max-width:none;text-wrap:pretty}
.hero p.lead{font-size:12.6px;color:#cdbcf2;max-width:34em;margin:0 0 24px;line-height:1.65}

/* Hero hai cot: noi dung ben trai, o dang nhap/dang ky ben phai */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.hero-card{background:var(--card);color:var(--ink);max-width:none;margin:0}
.hero-card h2{font-size:15px}
@media (max-width:700px){
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .hero{padding:36px 16px 40px}
}
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.price{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;display:flex;flex-direction:column}
.price.hot{border:2px solid var(--accent)}
.price .tier{font-size:9.1px;letter-spacing:.14em;text-transform:uppercase;font-weight:800;color:var(--purple-700);margin-bottom:10px}
.price .amt{font-size:22.4px;font-weight:900;letter-spacing:-.03em;margin-bottom:4px}
.price .per{font-size:9.8px;color:var(--muted);margin-bottom:18px}
.price ul{list-style:none;padding:0;margin:0 0 22px;font-size:10.5px;color:var(--ink-2)}
.price li{padding-left:22px;position:relative;margin-bottom:9px}
.price li::before{content:"\2713";position:absolute;left:0;color:var(--accent);font-weight:800}
.price .btn{margin-top:auto}

/* ---------- Misc ---------- */
.lock-note{background:var(--purple-900);color:#fff;border-radius:var(--radius-lg);padding:30px;text-align:center}
.lock-note h2{color:#fff}
.lock-note p{color:#cdbcf2;max-width:560px;margin:0 auto 20px}
.center{text-align:center}
.spinner{width:26px;height:26px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);
  background:var(--purple-900);color:#fff;padding:13px 24px;border-radius:12px;
  font-size:10.5px;font-weight:600;z-index:200;box-shadow:0 10px 30px rgba(0,0,0,.25);
}
.copy-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.copy-row input{flex:1;min-width:240px}

@media (max-width:720px){
  /* iOS tu phong to trang khi o nhap co chu < 16px - giu 16px tren mobile */
  .field input,.field select,.field textarea,.copy-row input{font-size:16px}
  .page{padding:24px 16px 70px}
  .card{padding:22px}
  .topbar-in{padding:12px 16px;gap:12px}
  .topbar-nav{gap:14px;font-size:9.1px}
  .plan-chip{display:none}
  .lesson-body{font-size:11.9px}
  h1{font-size:21px}
  .section-head h2{font-size:16.8px}
  .hero{padding:48px 16px 56px}
}