/* =====================================================================
   VFC LEGACY — Giao diện học (light-luxury, đồng bộ Cẩm Nang Legacy)
   Palette: lead green · legacy gold · dark · cream
   Fonts: Cormorant Garamond (tiêu đề) · Be Vietnam Pro (thân)
   ===================================================================== */

:root {
  /* Bộ nhận diện đồng bộ app Mentor: ivory ấm · olive · antique gold · Lora */
  --lead:        #3a472e;   /* Olive Green — nhấn chính */
  --lead-deep:   #1b3426;   /* Deep rêu */
  --gold:        #c59b27;   /* Antique Gold */
  --gold-soft:   #d8b65a;
  --dark:        #262019;   /* mực ấm */
  --ink:         #3a342b;   /* chữ thân */
  --muted:       #5d544a;   /* taupe ấm */
  --cream:       #f4efe6;   /* Warm Ivory — nền */
  --white:       #fffdf8;   /* trắng ngà */
  --line:        #e4d9c6;   /* viền ivory */

  --font-body:   'Be Vietnam Pro', system-ui, sans-serif;
  --font-serif:  'Lora', Georgia, serif;

  --space-sec:   clamp(3.5rem, 2.5rem + 4vw, 7rem);
  --r:           16px;
  --r-lg:        18px;
  --dur:         420ms;
  --ease:        cubic-bezier(0.16, 1, 0.3, 1);

  /* màu mỗi tầng (đất ấm, hài hoà nền ivory) */
  --t1:#a8432f; --t2:#b9802b; --t3:#2f6b5e; --t4:#3a472e; --t5:#6d4b7a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 100% 0%, rgba(58,71,46,0.06) 0%, transparent 30%),
    radial-gradient(circle at 0% 100%, rgba(197,155,39,0.07) 0%, transparent 30%);
  background-attachment: fixed;
}

h1, h2, h3, h4 { font-family: var(--font-serif); color: var(--dark); margin: 0; font-weight: 700; }

a { color: inherit; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ============================ TOP BAR ============================ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(245,247,246,0.82);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--font-serif); }
.brand .logo { height: 34px; width: auto; flex: none; }
.brand .mark { font-size: 1.3rem; color: var(--lead); letter-spacing: .5px; font-weight: 700; line-height: 1; }
.brand .sub { font-size: .64rem; letter-spacing: 2.5px; text-transform: uppercase; color: var(--gold); font-family: var(--font-body); font-weight: 600; display: block; margin-top: 4px; }
.brand .txt { display: flex; flex-direction: column; justify-content: center; }
.topbar .prog { font-size: .8rem; color: var(--muted); }
.topbar .prog b { color: var(--lead); }

/* ---- đăng nhập / khoá bài ---- */
.topbar .auth { display: inline-flex; align-items: center; gap: 10px; margin-left: 14px; }
.topbar .auth .who { font-size: .82rem; color: var(--muted); }
.topbar .auth .lo { font: inherit; font-size: .8rem; cursor: pointer; border: 1px solid var(--line); background: var(--white); border-radius: 8px; padding: 4px 10px; color: var(--ink); }
.topic.locked { opacity: .62; }
.topic.locked .num { color: var(--muted); }
.topic.locked:hover { transform: none; box-shadow: none; border-left-color: var(--line); }
.topic.locked .go { opacity: 1; }

.login-ov { position: fixed; inset: 0; z-index: 300; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at 30% 20%, rgba(79,127,115,.18), transparent 60%), var(--cream); padding: 20px; }
.login-card { background: var(--white); border: 1px solid var(--line); border-radius: 22px; padding: 36px 32px;
  width: min(420px, 100%); box-shadow: 0 30px 70px rgba(26,31,29,.15); text-align: center; }
.login-brand b { font-family: var(--font-serif); font-size: 2rem; color: var(--lead); letter-spacing: 2px; display: block; }
.login-brand span { font-size: .7rem; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); font-weight: 600; }
.login-card h3 { margin: 22px 0 4px; color: var(--dark); }
.login-sub { color: var(--muted); font-size: .9rem; margin: 0 0 18px; }
.login-in { width: 100%; font: inherit; border: 1.5px solid var(--line); border-radius: 12px; padding: 13px 14px; margin-bottom: 12px; }
.login-in:focus { outline: none; border-color: var(--lead); }
.login-err { color: #c0392b; font-size: .85rem; min-height: 18px; margin-bottom: 4px; }

/* ============================ HERO ============================ */
.hero { text-align: center; padding: clamp(3.5rem, 3rem + 5vw, 7rem) 0 2rem; position: relative; }
.hero .eyebrow {
  font-size: .82rem; text-transform: uppercase; letter-spacing: 4px;
  color: var(--gold); font-weight: 600; margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(3.2rem, 1.5rem + 7vw, 7rem);
  line-height: .95; letter-spacing: 2px; color: var(--lead);
}
.hero .slogan { font-style: italic; color: var(--muted); font-size: clamp(1rem,.9rem+.4vw,1.25rem); margin-top: 14px; }
.hero .quote {
  max-width: 640px; margin: 34px auto 0; font-family: var(--font-serif);
  font-size: clamp(1.2rem, 1rem + .8vw, 1.7rem); font-style: italic; line-height: 1.5; color: var(--dark);
}
.hero .quote span { display:block; margin-top: 12px; font-family: var(--font-body); font-style: normal; font-size: .85rem; letter-spacing: 2px; text-transform: uppercase; color: var(--gold); }
.hero .divider { width: 90px; height: 3px; margin: 30px auto 0; border-radius: 2px; background: linear-gradient(90deg, var(--lead), var(--gold)); }
.hero-cta { display: inline-block; margin-top: 28px; background: var(--lead); color: #fff; font-weight: 600; text-decoration: none; padding: 14px 30px; border-radius: 999px; box-shadow: 0 10px 24px -8px rgba(58,71,46,.5); transition: transform var(--dur) var(--ease), background var(--dur) var(--ease); }
.hero-cta:hover { background: var(--lead-deep); transform: translateY(-2px); }

/* ============================ MANIFESTO ============================ */
.manifesto { padding: var(--space-sec) 0 1rem; }
.manifesto .panel {
  background: linear-gradient(135deg, var(--lead) 0%, var(--lead-deep) 100%);
  color: var(--white); border-radius: var(--r-lg);
  padding: clamp(2rem, 1.5rem + 3vw, 3.5rem);
  box-shadow: 0 24px 50px rgba(79,127,115,.22);
  position: relative; overflow: hidden;
}
.manifesto .panel::before {
  content: '“'; position: absolute; top: -30px; right: 24px;
  font-family: var(--font-serif); font-size: 14rem; color: rgba(255,255,255,.07); line-height: 1;
}
.manifesto h2 { color: var(--gold); font-size: clamp(1.6rem,1.2rem+1.4vw,2.4rem); margin-bottom: 14px; }
.manifesto p { color: rgba(255,255,255,.92); max-width: 720px; margin: 0 0 12px; }
.manifesto .perks { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 14px; margin-top: 26px; }
.manifesto .perk { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14); border-radius: 12px; padding: 16px 18px; }
.manifesto .perk b { color: var(--gold-soft); display:block; margin-bottom: 4px; }
.manifesto .perk span { font-size: .92rem; color: rgba(255,255,255,.85); }

/* ============================ LỘ TRÌNH (5 tầng) ============================ */
.path { padding: var(--space-sec) 0; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head .eyebrow { font-size:.8rem; letter-spacing:4px; text-transform:uppercase; color: var(--gold); font-weight:600; }
.section-head h2 { font-size: clamp(2rem,1.4rem+2vw,3rem); color: var(--lead); margin-top: 8px; }
.section-head p { color: var(--muted); max-width: 560px; margin: 12px auto 0; }

.tang { margin-bottom: 56px; }
.tang-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.tang-badge {
  flex: none; width: 54px; height: 54px; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.5rem;
  background: color-mix(in srgb, var(--tang) 14%, var(--white));
  border: 1.5px solid color-mix(in srgb, var(--tang) 40%, transparent);
}
.tang-head .meta .kicker { font-size: .74rem; letter-spacing: 2px; text-transform: uppercase; color: var(--tang); font-weight: 700; }
.tang-head .meta h3 { font-size: clamp(1.4rem,1.1rem+1vw,2rem); color: var(--dark); line-height: 1.1; }
.tang-head .meta .moice { font-size: .92rem; color: var(--muted); font-style: italic; margin-top: 4px; }
.tang-head .count { margin-left: auto; flex: none; font-size: .82rem; color: var(--muted); white-space: nowrap; }
.tang-head .count b { font-family: var(--font-serif); font-size: 1.6rem; color: var(--tang); }

/* danh sách chủ đề — hàng editorial, không phải lưới thẻ đồng đều */
.topics { display: grid; gap: 10px; }
.topic {
  display: grid; grid-template-columns: 60px 1fr auto; align-items: center; gap: 16px;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--r);
  border-left: 3px solid color-mix(in srgb, var(--tang) 60%, transparent);
  padding: 16px 20px; cursor: pointer; text-align: left;
  font: inherit; color: inherit; width: 100%;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.topic:hover, .topic:focus-visible {
  transform: translateX(4px);
  box-shadow: -6px 12px 28px rgba(26,31,29,.08);
  border-left-color: var(--tang);
  outline: none;
}
.topic .num { font-family: var(--font-serif); font-size: 1.7rem; color: color-mix(in srgb, var(--tang) 75%, var(--dark)); font-weight: 700; line-height: 1; }
.topic .body .t { font-weight: 600; color: var(--dark); font-size: 1.05rem; line-height: 1.3; }
.topic .body .sit { font-size: .88rem; color: var(--muted); margin-top: 3px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.topic .go { color: var(--tang); font-size: 1.3rem; opacity: .5; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.topic:hover .go { opacity: 1; transform: translateX(3px); }

/* ============================ READER (bài học) ============================ */
.reader-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(26,31,29,.45); backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none; transition: opacity var(--dur) var(--ease);
}
.reader-overlay.open { opacity: 1; pointer-events: auto; }
/* Màn đọc bài kiểu Mentor: toàn trang, cuộn theo thẻ */
.reader {
  position: fixed; inset: 0; z-index: 101; background: var(--cream);
  transform: translateY(100%); transition: transform var(--dur) var(--ease);
  display: flex; flex-direction: column;
}
.reader.open { transform: translateY(0); }

/* thanh trên dính: nút quay lại + tên bài + thanh % chạy theo cuộn */
.reader-bar {
  flex: none; display: flex; align-items: center; gap: 12px;
  padding: 11px 16px; border-bottom: 1px solid var(--line);
  background: rgba(244,239,230,.9); backdrop-filter: blur(10px);
}
.reader-bar .close {
  flex: 0 0 auto; width: 40px; height: 40px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--white); color: var(--dark);
  font-size: 1.3rem; line-height: 1; cursor: pointer; transition: transform var(--dur) var(--ease);
}
.reader-bar .close:active { transform: scale(.92); }
.reader-bar .bar-mid { flex: 1; min-width: 0; }
.reader-bar .bar-t { font-size: .84rem; font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 5px; }
.reader-bar .track { height: 6px; border-radius: 99px; background: var(--line); overflow: hidden; }
.reader-bar .track i { display: block; height: 100%; width: 0; border-radius: 99px; background: linear-gradient(90deg, var(--tang), var(--gold)); transition: width .15s linear; }
.reader-bar .pct { flex: 0 0 auto; font-size: .8rem; font-weight: 700; color: var(--tang); min-width: 36px; text-align: right; }

.reader-body { overflow-y: auto; padding: 22px 16px 130px; max-width: 720px; margin: 0 auto; width: 100%; font-size: 1.06rem; line-height: 1.78; }
.reader-body .num { font-family: var(--font-serif); font-size: 3rem; color: color-mix(in srgb, var(--tang) 70%, var(--dark)); line-height: 1; }
.reader-body h2 { font-size: clamp(1.7rem,1.3rem+1.6vw,2.5rem); color: var(--dark); margin: 6px 0 4px; line-height: 1.18; }
.reader-body .tang-name { font-size: .78rem; letter-spacing: 2px; text-transform: uppercase; color: var(--tang); font-weight: 700; }
.reader-body .block p, .reader-body .lop p, .reader-body .block .label + p { font-size: 1.08rem; line-height: 1.8; }

.block { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: 22px 24px; margin-top: 22px; border-left: 4px solid var(--tang); }
.block.gold { border-left-color: var(--gold); background: rgba(201,162,77,.04); }
.block .label { display: inline-flex; align-items: center; gap: 8px; font-size: .76rem; letter-spacing: 2px; text-transform: uppercase; font-weight: 700; color: var(--tang); margin-bottom: 10px; }
.block.gold .label { color: var(--gold); }
.block p { margin: 0; color: var(--ink); font-size: 1.05rem; }

.reader-note {
  margin-top: 26px; padding: 18px 22px; border-radius: var(--r);
  background: rgba(79,127,115,.06); border: 1px dashed rgba(79,127,115,.3);
  font-size: .92rem; color: var(--muted);
}
.reader-note b { color: var(--lead); }

/* ---- bài học đầy đủ: 3 Lớp Chuyển Hoá ---- */
.block.story { border-left-color: var(--gold); background: rgba(201,162,77,.05); }
.block.story p { font-family: var(--font-serif); font-size: 1.12rem; font-style: italic; line-height: 1.6; }
.block .sub { margin-top: 10px; font-size: .94rem; color: var(--muted); }
.block .sub.brain { background: rgba(62,110,145,.07); border-radius: 10px; padding: 10px 12px; color: #3a4a55; }

.lop { border-radius: var(--r); padding: 20px 22px; margin-top: 18px; border: 1px solid var(--line); }
.lop-head { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.08rem; color: var(--dark); margin-bottom: 10px; font-family: var(--font-serif); }
.lop-ic { font-size: 1.25rem; }
.lop p { margin: 0 0 8px; }
.lop .sub { font-size: .92rem; color: var(--muted); margin-top: 8px; }
.lop-soi  { background: rgba(126,90,162,.05); border-left: 4px solid var(--t5); }
.lop-chua { background: rgba(62,110,145,.05); border-left: 4px solid var(--t3); }
.lop-trao { background: rgba(79,127,115,.05); border-left: 4px solid var(--lead); }
.method-name { font-weight: 700; color: var(--lead-deep); }
.lop-chua .method-name { color: var(--t3); }

ul.steps { margin: 6px 0 4px; padding-left: 0; list-style: none; }
ul.steps li { position: relative; padding: 8px 0 8px 26px; border-bottom: 1px dashed var(--line); }
ul.steps li:last-child { border-bottom: none; }
ul.steps li::before { content: "▸"; position: absolute; left: 4px; color: var(--gold); font-weight: 700; }

.thongdiep {
  margin-top: 26px; padding: 24px; border-radius: var(--r-lg); text-align: center;
  background: linear-gradient(135deg, var(--lead), var(--lead-deep)); color: #fff;
  font-family: var(--font-serif); font-size: 1.25rem; font-style: italic; line-height: 1.5;
}
.thongdiep span { display: block; margin-top: 12px; font-family: var(--font-body); font-style: normal; font-size: .78rem; letter-spacing: 2px; text-transform: uppercase; color: var(--gold-soft); }

.block.lib { border-left-color: var(--gold); background: rgba(201,162,77,.04); }
.block.lib .label { color: var(--gold); }
.block.lib ul.steps li { padding-left: 28px; }
.block.lib ul.steps li::before { content: "•"; }

/* huy hiệu "bài đầy đủ" trên hàng chủ đề */
.topic .badge-full {
  display: inline-block; margin-left: 8px; font-size: .64rem; font-weight: 700; letter-spacing: .5px;
  text-transform: uppercase; color: var(--gold); border: 1px solid color-mix(in srgb, var(--gold) 50%, transparent);
  border-radius: 999px; padding: 1px 8px; vertical-align: middle;
}

.done-btn { display: block; width: 100%; margin-top: 28px; font: inherit; font-weight: 700; cursor: pointer;
  border: 1.5px solid var(--lead); background: var(--white); color: var(--lead); border-radius: 14px; padding: 15px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease); }
.done-btn:hover { background: var(--lead); color: #fff; }
.done-btn.is-done { background: var(--lead); color: #fff; border-color: var(--lead); }

.reader-nav { display: flex; gap: 12px; margin-top: 14px; position: sticky; bottom: 10px; background: rgba(244,239,230,.92); backdrop-filter: blur(8px); padding: 8px; border-radius: 16px; border: 1px solid var(--line); }
.topic.is-done .go { color: #2e8b57; }
.topic.is-done .num::after { content: " ✓"; color: #2e8b57; font-size: .9rem; }
.reader-nav button {
  flex: 1; font: inherit; cursor: pointer; padding: 14px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--white); color: var(--dark);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.reader-nav button:hover:not(:disabled) { background: var(--lead); color: var(--white); transform: translateY(-2px); }
.reader-nav button:disabled { opacity: .4; cursor: default; }

/* ============================ FOOTER ============================ */
.foot { text-align: center; padding: var(--space-sec) 0 4rem; border-top: 1px solid var(--line); margin-top: 2rem; }
.foot .vision { max-width: 680px; margin: 0 auto 28px; }
.foot .vision h3 { font-size: clamp(1.5rem,1.2rem+1.2vw,2.1rem); color: var(--lead); margin-bottom: 12px; }
.foot .vision p { color: var(--ink); }
.foot .sign-img { height: 64px; width: auto; margin: 0 auto 6px; display: block; opacity: .92; }
.foot .author { font-family: var(--font-serif); }
.foot .author .name { font-size: 1.4rem; color: var(--lead); font-weight: 700; }
.foot .author .role { font-family: var(--font-body); font-size: .85rem; color: var(--muted); max-width: 460px; margin: 6px auto 0; }
.foot .org { margin-top: 22px; font-size: .78rem; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); font-weight: 600; }

/* ============================ HỆ HỌC TẬP (Nhớ·Hiểu·Áp dụng) ============================ */
.learn { margin-top: 30px; padding: 24px; border-radius: var(--r-lg); background: rgba(26,31,29,.025); border: 1px solid var(--line); }
.learn-title { font-family: var(--font-serif); font-weight: 700; font-size: 1.25rem; color: var(--dark); margin-bottom: 16px; }
.learn-btn {
  font: inherit; font-weight: 600; cursor: pointer; border: none; border-radius: 12px;
  padding: 13px 18px; background: var(--lead); color: #fff; width: 100%;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.learn-btn:hover { background: var(--lead-deep); transform: translateY(-2px); }

/* Quiz */
.quiz { margin-top: 18px; }
.quiz-head { font-weight: 700; color: var(--lead); margin-bottom: 12px; }
.quiz-score { color: var(--gold); font-family: var(--font-serif); font-size: 1.1rem; }
.q { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; margin-bottom: 12px; }
.q-text { font-weight: 600; color: var(--dark); margin-bottom: 12px; line-height: 1.45; }
.opt {
  display: block; width: 100%; text-align: left; font: inherit; cursor: pointer;
  background: var(--cream); border: 1.5px solid var(--line); border-radius: 10px;
  padding: 11px 14px; margin-bottom: 8px; color: var(--ink);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.opt:hover:not(:disabled) { border-color: var(--lead); }
.opt:disabled { cursor: default; }
.opt.ok { border-color: #2e8b57; background: rgba(46,139,87,.12); font-weight: 600; }
.opt.bad { border-color: #c0392b; background: rgba(192,57,43,.10); }
.q-explain { display: none; margin-top: 8px; font-size: .92rem; color: var(--muted); background: rgba(79,127,115,.06); border-radius: 8px; padding: 10px 12px; }
.q.correct .q-text::before { content: "✓ "; color: #2e8b57; }
.q.wrong .q-text::before { content: "✗ "; color: #c0392b; }

/* Thước đo tự chấm */
.rate { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); }
.rate-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; font-size: .95rem; flex-wrap: wrap; }
.dots .dot { border: none; background: none; cursor: pointer; font-size: 1.2rem; color: var(--line); padding: 0 2px; }
.dots .dot.on { color: var(--gold); }
.counter { display: inline-flex; align-items: center; gap: 8px; }
.counter button { width: 28px; height: 28px; border-radius: 8px; border: 1px solid var(--line); background: var(--white); cursor: pointer; font-size: 1.1rem; line-height: 1; }
.counter .cval { font-family: var(--font-serif); font-size: 1.2rem; color: var(--lead); min-width: 18px; text-align: center; }

/* Modal chung */
.lmodal-ov { position: fixed; inset: 0; z-index: 200; background: rgba(26,31,29,.5); backdrop-filter: blur(3px); }
.lmodal {
  position: fixed; z-index: 201; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: min(620px, 92vw); max-height: 88vh; overflow-y: auto;
  background: var(--cream); border-radius: var(--r-lg); padding: 28px 30px;
  box-shadow: 0 30px 80px rgba(0,0,0,.3);
}
.lmodal-x { position: absolute; top: 12px; right: 16px; border: none; background: none; font-size: 1.6rem; cursor: pointer; color: var(--muted); }
.lmodal h3 { color: var(--lead); font-size: 1.4rem; margin-bottom: 8px; padding-right: 24px; }
.ap-lead { color: var(--muted); font-size: .95rem; }
.ap-sec-h { font-weight: 700; color: var(--lead); margin: 16px 0 8px; font-size: 1rem; }
.ap-ex { display: flex; flex-direction: column; gap: 6px; }
.ap-ex-row { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--white); }
.ap-ex-q { display: block; width: 100%; text-align: left; font: inherit; font-weight: 600; color: var(--dark); cursor: pointer; background: none; border: none; padding: 12px 14px; }
.ap-ex-q:hover { background: rgba(79,127,115,.05); }
.ap-ex-a { display: none; padding: 0 14px 14px; font-size: .94rem; color: var(--ink); border-top: 1px dashed var(--line); padding-top: 10px; }
.ap-ex-row.open .ap-ex-a { display: block; }
.ap-ex-row.open .ap-ex-q { color: var(--lead); }
.ap-proto-wrap { margin: 10px 0; }
.ap-proto-wrap summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
.ap-check { margin: 14px 0; background: rgba(201,162,77,.06); border: 1px solid rgba(201,162,77,.25); border-radius: 12px; padding: 14px 16px; }
.ap-check-h { font-weight: 700; color: var(--gold); margin-bottom: 8px; font-size: .92rem; }
.ap-ck { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 7px; font-size: .92rem; cursor: pointer; }
.ap-ck input { margin-top: 3px; }
.ap-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.chip { font: inherit; font-size: .88rem; cursor: pointer; border: 1px solid var(--line); background: var(--white); border-radius: 999px; padding: 7px 14px; transition: all var(--dur) var(--ease); }
.chip:hover { border-color: var(--lead); background: rgba(79,127,115,.06); }
.ap-input { width: 100%; min-height: 70px; font: inherit; border: 1.5px solid var(--line); border-radius: 12px; padding: 12px; resize: vertical; }
.ap-proto { margin: 16px 0; }
.ap-step { background: var(--white); border-left: 4px solid var(--lead); border-radius: 10px; padding: 14px 16px; margin-bottom: 10px; font-size: .95rem; }
.ap-step ul { margin: 8px 0 0; padding-left: 20px; }
.ap-step li { margin-bottom: 6px; }
.ap-saved { margin-top: 14px; }
.ap-saved-h { font-weight: 700; color: var(--lead); margin-bottom: 6px; }
.ap-saved-i { font-size: .9rem; color: var(--ink); margin-bottom: 4px; }
.ap-saved-i i { color: var(--muted); }

/* Ôn nhanh trong modal */
.rv-prog { font-size: .82rem; letter-spacing: 1px; text-transform: uppercase; color: var(--gold); font-weight: 700; margin-bottom: 10px; }
.rv-opts { margin: 4px 0; }

/* Trang chủ: ôn nhanh + hồ sơ */
#learn-home { margin-bottom: 40px; }
.home-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 22px 24px; margin-bottom: 16px; }
.home-card.review { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-left: 4px solid var(--gold); background: rgba(201,162,77,.05); }
.home-card.review .hc-l b { display: block; font-size: 1.1rem; color: var(--dark); margin-bottom: 2px; }
.home-card.review .hc-l span { font-size: .9rem; color: var(--muted); }
.home-card.review .learn-btn { width: auto; background: var(--gold); color: var(--dark); }
.home-card.review .learn-btn:hover { background: var(--gold-soft); }
.hc-h { font-family: var(--font-serif); font-weight: 700; font-size: 1.2rem; color: var(--lead); margin-bottom: 16px; }
.hc-stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.stat { text-align: center; background: var(--cream); border-radius: 12px; padding: 14px 8px; }
.st-ic { font-size: 1.2rem; }
.st-v { font-family: var(--font-serif); font-size: 1.5rem; font-weight: 700; color: var(--lead); line-height: 1.1; margin-top: 2px; }
.st-l { font-size: .72rem; color: var(--muted); margin-top: 2px; }
.hc-circles { margin-top: 14px; text-align: center; font-size: .85rem; color: var(--muted); }
.hc-circles b { color: var(--lead); }
@media (max-width: 600px) { .hc-stats { grid-template-columns: repeat(3, 1fr); } }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 640px) {
  .topic { grid-template-columns: 46px 1fr auto; gap: 12px; padding: 14px 16px; }
  .topic .num { font-size: 1.4rem; }
  .topic .body .sit { -webkit-line-clamp: 2; }
  .reader-body { padding: 26px 22px 50px; }
  .topbar .prog { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}