/*
Theme Name:   CNL Learning
Theme URI:    https://cnl-learning.vn
Author:       CNL Team
Author URI:   https://cnl-learning.vn
Description:  Theme chuyên biệt cho nền tảng học tiếng Trung online – CNL Learning. Hỗ trợ đầy đủ flashcard, luyện nghe, tập viết, luyện thi HSK, dashboard học viên và nhiều tính năng học tập hiện đại.
Version:      1.0.0
License:      GPL-2.0-or-later
License URI:  https://www.gnu.org/licenses/gpl-2.0.html
Text Domain:  cnl-learning
Tags:         education, chinese, learning, responsive, dark, e-learning
*/

/* ════════════════════════════════════════════════════════════
   CNL Learning Frontend Theme – Base Variables
   ════════════════════════════════════════════════════════════ */
:root {
  /* Brand colors */
  --primary:       #e53935;
  --primary-dk:    #b71c1c;
  --secondary:     #ff6b9d;
  --accent:        #a29bfe;
  --success:       #00b894;
  --warning:       #fdcb6e;
  --danger:        #e17055;
  --info:          #0984e3;
  --purple:        #6c5ce7;

  /* Dark theme */
  --bg:            #0f0f1a;
  --bg-card:       #1a1a2e;
  --bg-panel:      #16213e;
  --bg-input:      rgba(0,0,0,.35);
  --border:        rgba(255,255,255,.08);
  --border-hover:  rgba(229,57,53,.4);

  --text:          #e8e8f0;
  --text-muted:    #8a8aaa;
  --text-white:    #ffffff;

  --radius-sm:     6px;
  --radius:        12px;
  --radius-lg:     20px;
  --shadow:        0 4px 24px rgba(0,0,0,.4);

  --font-main:     'Be Vietnam Pro', 'Inter', sans-serif;
  --font-zh:       'Noto Sans SC', 'Ma Shan Zheng', serif;

  --transition:    .25s ease;
  --container:     1280px;
  --gap:           24px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  { font-family: var(--font-main); background: var(--bg); color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a     { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--secondary); }
img   { max-width: 100%; height: auto; display: block; }

/* ── Container ─────────────────────────────────────────────── */
.cnl-container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gap); }

/* ── Header / Nav ──────────────────────────────────────────── */
.cnl-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(15,15,26,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--gap);
}
.cnl-header__inner {
  max-width: var(--container); margin: 0 auto;
  display: flex; align-items: center; height: 64px; gap: 32px;
}
.cnl-logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.15rem; color: #fff; }
.cnl-logo__icon { width: 36px; height: 36px; background: var(--primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-family: var(--font-zh); font-size: 1.1rem; color: #fff; }

.cnl-nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.cnl-nav a {
  padding: 6px 14px; border-radius: var(--radius-sm); font-size: .88rem; font-weight: 500;
  color: var(--text-muted); transition: all var(--transition);
}
.cnl-nav a:hover, .cnl-nav a.current { color: #fff; background: rgba(255,255,255,.07); }
.cnl-nav a.current { color: var(--primary); }

.cnl-header__right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

/* Search bar */
.cnl-search-bar {
  display: flex; align-items: center; background: rgba(0,0,0,.3);
  border: 1px solid var(--border); border-radius: 30px; padding: 6px 14px; gap: 8px;
  width: 240px; transition: all var(--transition);
}
.cnl-search-bar:focus-within { border-color: var(--primary); width: 300px; }
.cnl-search-bar input { background: none; border: none; color: var(--text); font-size: .85rem; width: 100%; outline: none; }
.cnl-search-bar i { color: var(--text-muted); font-size: .9rem; }

/* Notification bell */
.cnl-notif-btn { position: relative; background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; padding: 6px; }
.cnl-notif-btn .badge { position: absolute; top: 0; right: 0; width: 16px; height: 16px; background: var(--primary); border-radius: 50%; font-size: .6rem; color: #fff; display: flex; align-items: center; justify-content: center; }

/* Avatar */
.cnl-avatar-btn { display: flex; align-items: center; gap: 8px; cursor: pointer; background: none; border: none; }
.cnl-avatar { width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--primary); object-fit: cover; }

/* ── Hero (Home) ───────────────────────────────────────────── */
.cnl-hero {
  background: linear-gradient(135deg, #b71c1c 0%, #e53935 40%, #c62828 100%);
  padding: 72px var(--gap); text-align: center; position: relative; overflow: hidden;
}
.cnl-hero::before {
  content: '汉字中文学习';
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-zh); font-size: 18vw; color: rgba(255,255,255,.04);
  pointer-events: none; letter-spacing: .2em;
}
.cnl-hero__content { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; }
.cnl-hero h1 { font-size: 3rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 16px; }
.cnl-hero h1 span { color: var(--warning); }
.cnl-hero p { font-size: 1.15rem; color: rgba(255,255,255,.85); margin-bottom: 32px; }
.cnl-hero__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cnl-hero__search {
  display: flex; gap: 0; max-width: 520px; margin: 32px auto 0;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  border-radius: 40px; overflow: hidden; backdrop-filter: blur(8px);
}
.cnl-hero__search input { flex: 1; background: none; border: none; padding: 14px 20px; color: #fff; font-size: .95rem; outline: none; }
.cnl-hero__search input::placeholder { color: rgba(255,255,255,.6); }
.cnl-hero__search button { padding: 14px 24px; background: #fff; color: var(--primary); border: none; font-weight: 700; cursor: pointer; font-size: .9rem; transition: background var(--transition); }
.cnl-hero__search button:hover { background: #f5f5f5; }

/* Stats bar */
.cnl-hero__stats { display: flex; justify-content: center; gap: 32px; margin-top: 32px; flex-wrap: wrap; }
.cnl-hero__stat  { color: rgba(255,255,255,.9); text-align: center; }
.cnl-hero__stat strong { display: block; font-size: 1.5rem; font-weight: 800; }
.cnl-hero__stat span   { font-size: .8rem; opacity: .8; }

/* ── Buttons ───────────────────────────────────────────────── */
.btn, .cnl-btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 22px;
  border-radius: 30px; font-weight: 600; font-size: .9rem;
  cursor: pointer; border: none; transition: all var(--transition);
}
.btn-primary, .cnl-btn--primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dk); color:#fff; transform: translateY(-1px); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.5); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.1); color: #fff; }
.btn-ghost  { background: rgba(255,255,255,.07); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: .82rem; }
.btn-icon { width: 38px; height: 38px; padding: 0; border-radius: 50%; justify-content: center; background: rgba(255,255,255,.07); color: var(--text-muted); border: 1px solid var(--border); }
.btn-icon:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ── Cards (frontend) ──────────────────────────────────────── */
.cnl-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; transition: all var(--transition);
}
.cnl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--border-hover); }
.cnl-card__img { position: relative; padding-top: 56.25%; overflow: hidden; }
.cnl-card__img img, .cnl-card__img .cnl-card__thumb { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cnl-card__thumb { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg,#1e1e3f,var(--primary-dk)); font-family: var(--font-zh); font-size: 3rem; color: rgba(255,255,255,.3); }
.cnl-card__body { padding: 16px; }
.cnl-card__title { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 6px; line-height: 1.4; }
.cnl-card__meta  { display: flex; align-items: center; gap: 10px; font-size: .75rem; color: var(--text-muted); flex-wrap: wrap; }
.cnl-card__meta i { margin-right: 3px; }
.cnl-card__footer { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.cnl-card__progress { height: 4px; background: rgba(255,255,255,.08); border-radius: 2px; margin-top: 10px; overflow: hidden; }
.cnl-card__progress-bar { height: 100%; background: linear-gradient(90deg,var(--primary),var(--secondary)); border-radius: 2px; transition: width .4s ease; }

/* ── Section ───────────────────────────────────────────────── */
.cnl-section { padding: 60px 0; }
.cnl-section__header { text-align: center; margin-bottom: 40px; }
.cnl-section__label  { display: inline-block; background: rgba(229,57,53,.15); color: var(--primary); padding: 4px 12px; border-radius: 20px; font-size: .78rem; font-weight: 600; margin-bottom: 10px; }
.cnl-section__title  { font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.cnl-section__sub    { color: var(--text-muted); font-size: 1rem; max-width: 560px; margin: 0 auto; }

/* ── Grid ──────────────────────────────────────────────────── */
.cnl-grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--gap); }
.cnl-grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--gap); }
.cnl-grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--gap); }

/* ── HSK Path Cards ────────────────────────────────────────── */
.cnl-hsk-path-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.cnl-hsk-path-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 20px; transition: all var(--transition); cursor: pointer;
}
.cnl-hsk-path-card:hover { transform: translateY(-4px); border-color: var(--border-hover); }
.cnl-hsk-path-card__level { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.cnl-hsk-path-card__name  { font-size: .85rem; color: var(--text-muted); margin-bottom: 12px; }
.cnl-hsk-path-card__stats { display: flex; gap: 16px; font-size: .78rem; color: var(--text-muted); margin-bottom: 12px; }
.cnl-hsk-path-card__stats strong { color: #fff; }
.cnl-hsk-path-card__progress { height: 6px; background: rgba(255,255,255,.08); border-radius: 3px; overflow: hidden; }
.cnl-hsk-path-card__progress-bar { height: 100%; background: linear-gradient(90deg,var(--primary),var(--secondary)); border-radius: 3px; }

/* ── Topic Grid ────────────────────────────────────────────── */
.cnl-topic-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 16px; }
.cnl-topic-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; text-align: center; cursor: pointer; transition: all var(--transition);
}
.cnl-topic-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.cnl-topic-card__icon { font-size: 2.5rem; margin-bottom: 8px; }
.cnl-topic-card__name { font-size: .85rem; font-weight: 600; color: #fff; }
.cnl-topic-card__count{ font-size: .72rem; color: var(--text-muted); margin-top: 2px; }

/* ── Vocabulary card ───────────────────────────────────────── */
.cnl-vocab-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(220px,1fr)); gap: 12px; }
.cnl-vocab-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; transition: all var(--transition); position: relative;
}
.cnl-vocab-card:hover { transform: translateY(-2px); border-color: var(--border-hover); }
.cnl-vocab-card__hanzi   { font-family: var(--font-zh); font-size: 2.4rem; font-weight: 700; color: #fff; line-height: 1; }
.cnl-vocab-card__pinyin  { font-size: .8rem; color: var(--accent); font-style: italic; margin: 2px 0 4px; }
.cnl-vocab-card__meaning { font-size: .82rem; color: var(--text-muted); }
.cnl-vocab-card__footer  { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; padding-top: 8px; border-top: 1px solid var(--border); }
.cnl-vocab-card__audio   { color: var(--text-muted); cursor: pointer; font-size: .9rem; }
.cnl-vocab-card__audio:hover { color: var(--primary); }
.cnl-vocab-card__fav     { color: var(--text-muted); cursor: pointer; font-size: .9rem; }
.cnl-vocab-card__fav.active, .cnl-vocab-card__fav:hover { color: #fd79a8; }

/* ── Flashcard ─────────────────────────────────────────────── */
.cnl-flashcard-scene { perspective: 800px; }
.cnl-flashcard-inner {
  position: relative; width: 100%; padding-top: 56.25%; transform-style: preserve-3d;
  transition: transform .6s ease; cursor: pointer;
}
.cnl-flashcard-inner.flipped { transform: rotateY(180deg); }
.cnl-flashcard-front, .cnl-flashcard-back {
  position: absolute; inset: 0; backface-visibility: hidden;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 32px;
}
.cnl-flashcard-back { transform: rotateY(180deg); background: linear-gradient(135deg,#1a1a3e,#2a1a4e); }
.cnl-flashcard-front .hanzi { font-family: var(--font-zh); font-size: 5rem; font-weight: 700; color: #fff; }
.cnl-flashcard-front .tap-hint { font-size: .75rem; color: var(--text-muted); margin-top: 16px; }
.cnl-flashcard-back  .pinyin  { font-size: 1.4rem; color: var(--accent); font-style: italic; margin-bottom: 8px; }
.cnl-flashcard-back  .meaning { font-size: 1.1rem; color: #fff; margin-bottom: 12px; }
.cnl-flashcard-back  .example { font-size: .85rem; color: var(--text-muted); }

.cnl-flashcard-actions { display: flex; gap: 12px; margin-top: 20px; justify-content: center; }
.cnl-fc-btn-wrong { background: rgba(225,112,85,.15); color: var(--danger); border: 1px solid rgba(225,112,85,.3); border-radius: 30px; padding: 10px 28px; cursor: pointer; font-weight: 600; transition: all var(--transition); }
.cnl-fc-btn-wrong:hover { background: var(--danger); color: #fff; }
.cnl-fc-btn-right { background: rgba(0,184,148,.15); color: var(--success); border: 1px solid rgba(0,184,148,.3); border-radius: 30px; padding: 10px 28px; cursor: pointer; font-weight: 600; transition: all var(--transition); }
.cnl-fc-btn-right:hover { background: var(--success); color: #fff; }

/* ── Dialogue / Chat ───────────────────────────────────────── */
.cnl-dialogue-list { display: flex; flex-direction: column; gap: 20px; }
.cnl-dialogue-line { display: flex; gap: 12px; }
.cnl-dialogue-line--b { flex-direction: row-reverse; }
.cnl-dialogue-avatar { width: 44px; height: 44px; border-radius: 50%; border: 2px solid var(--border); object-fit: cover; flex-shrink: 0; }
.cnl-dialogue-bubble {
  max-width: 65%; background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 16px 16px 16px 0; padding: 12px 16px;
}
.cnl-dialogue-line--b .cnl-dialogue-bubble {
  background: rgba(229,57,53,.12); border-radius: 16px 16px 0 16px; border-color: rgba(229,57,53,.2);
}
.cnl-dialogue-bubble .zh   { font-family: var(--font-zh); font-size: 1.05rem; color: #fff; margin-bottom: 4px; }
.cnl-dialogue-bubble .py   { font-size: .78rem; color: var(--accent); font-style: italic; }
.cnl-dialogue-bubble .vi   { font-size: .78rem; color: var(--text-muted); }
.cnl-dialogue-bubble__audio { display: inline-flex; align-items: center; gap: 4px; margin-top: 6px; font-size: .75rem; color: var(--text-muted); cursor: pointer; }
.cnl-dialogue-bubble__audio:hover { color: var(--primary); }

/* ── Listening ─────────────────────────────────────────────── */
.cnl-audio-player {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px;
}
.cnl-audio-player__wave { height: 60px; background: rgba(0,0,0,.2); border-radius: 8px; margin-bottom: 12px; position: relative; overflow: hidden; cursor: pointer; }
.cnl-audio-player__controls { display: flex; align-items: center; gap: 12px; }
.cnl-audio-player__time { font-size: .78rem; color: var(--text-muted); }
.cnl-audio-player__speed { font-size: .75rem; background: rgba(255,255,255,.07); border: 1px solid var(--border); border-radius: 4px; padding: 3px 8px; cursor: pointer; color: var(--text-muted); }
.cnl-transcript { margin-top: 20px; }
.cnl-transcript__line { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: .88rem; }
.cnl-transcript__line .zh { color: #fff; font-family: var(--font-zh); }
.cnl-transcript__line .vi { color: var(--text-muted); }

/* ── Writing canvas ────────────────────────────────────────── */
.cnl-writing-canvas {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
}
.cnl-writing-canvas canvas { display: block; touch-action: none; background: #0a0a1a; }
.cnl-writing-controls { display: flex; gap: 10px; padding: 12px; border-top: 1px solid var(--border); align-items: center; }

/* ── Quiz ──────────────────────────────────────────────────── */
.cnl-quiz-container { max-width: 680px; margin: 0 auto; }
.cnl-quiz-header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.cnl-quiz-progress { flex: 1; height: 6px; background: rgba(255,255,255,.08); border-radius: 3px; }
.cnl-quiz-progress-bar { height: 100%; background: linear-gradient(90deg,var(--primary),var(--secondary)); border-radius: 3px; transition: width .4s ease; }
.cnl-quiz-timer { font-size: .85rem; color: var(--text-muted); }

.cnl-quiz-question { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; margin-bottom: 16px; }
.cnl-quiz-question h3 { font-size: 1.2rem; color: #fff; margin-bottom: 20px; }
.cnl-quiz-options    { display: flex; flex-direction: column; gap: 10px; }
.cnl-quiz-option {
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 16px; cursor: pointer;
  transition: all var(--transition); font-size: .9rem; color: var(--text);
  display: flex; align-items: center; gap: 10px;
}
.cnl-quiz-option:hover   { border-color: var(--primary); background: rgba(229,57,53,.05); }
.cnl-quiz-option.selected{ border-color: var(--primary); background: rgba(229,57,53,.1); color: #fff; }
.cnl-quiz-option.correct { border-color: var(--success); background: rgba(0,184,148,.1); color: var(--success); }
.cnl-quiz-option.wrong   { border-color: var(--danger);  background: rgba(225,112,85,.1);  color: var(--danger);  }
.cnl-quiz-option__letter { width: 28px; height: 28px; border-radius: 50%; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .82rem; flex-shrink: 0; }

/* ── Dashboard học viên ────────────────────────────────────── */
.cnl-dashboard { display: grid; grid-template-columns: 280px 1fr; gap: var(--gap); }
.cnl-sidebar { display: flex; flex-direction: column; gap: 16px; }
.cnl-user-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
  text-align: center;
}
.cnl-user-card__avatar { width: 80px; height: 80px; border-radius: 50%; border: 3px solid var(--primary); object-fit: cover; margin: 0 auto 12px; }
.cnl-user-card__name   { font-size: 1rem; font-weight: 700; color: #fff; }
.cnl-user-card__level  { font-size: .78rem; color: var(--text-muted); margin-top: 2px; }
.cnl-user-card__stats  { display: flex; justify-content: space-around; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.cnl-user-card__stat   { text-align: center; }
.cnl-user-card__stat strong { display: block; font-size: 1.1rem; color: #fff; font-weight: 700; }
.cnl-user-card__stat small  { font-size: .7rem; color: var(--text-muted); }

.cnl-streak-card {
  background: linear-gradient(135deg,rgba(229,57,53,.15),rgba(255,107,157,.08));
  border: 1px solid rgba(229,57,53,.3); border-radius: var(--radius); padding: 16px;
  display: flex; align-items: center; gap: 12px;
}
.cnl-streak-card__icon { font-size: 2rem; }
.cnl-streak-card__val  { font-size: 1.5rem; font-weight: 800; color: var(--warning); }
.cnl-streak-card__label{ font-size: .75rem; color: var(--text-muted); }

/* Skill progress list */
.cnl-skill-list { display: flex; flex-direction: column; gap: 12px; }
.cnl-skill-item label { display: flex; justify-content: space-between; font-size: .8rem; color: var(--text-muted); margin-bottom: 4px; }
.cnl-skill-item label span { color: #fff; font-weight: 600; }
.cnl-skill-bar { height: 6px; background: rgba(255,255,255,.08); border-radius: 3px; }
.cnl-skill-bar__fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg,var(--primary),var(--secondary)); }

/* Calendar heatmap */
.cnl-calendar { display: grid; grid-template-columns: repeat(7,1fr); gap: 4px; }
.cnl-cal-day  { aspect-ratio: 1; border-radius: 3px; background: rgba(255,255,255,.06); }
.cnl-cal-day--active { background: var(--success); }
.cnl-cal-day--today  { border: 2px solid var(--primary); }

/* Badges grid */
.cnl-badges-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.cnl-badge-item  { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px; text-align: center; }
.cnl-badge-item.locked { opacity: .4; }
.cnl-badge-item__icon  { font-size: 2rem; margin-bottom: 4px; }
.cnl-badge-item__name  { font-size: .7rem; color: var(--text-muted); }

/* ── Leaderboard ───────────────────────────────────────────── */
.cnl-leaderboard { display: flex; flex-direction: column; gap: 8px; }
.cnl-leader-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.cnl-leader-item:hover { border-color: var(--border-hover); }
.cnl-leader-item__rank { width: 24px; font-size: .85rem; font-weight: 700; color: var(--text-muted); text-align: center; }
.cnl-leader-item--1 .cnl-leader-item__rank { color: var(--warning); font-size: 1.1rem; }
.cnl-leader-item--2 .cnl-leader-item__rank { color: #aaa; font-size: 1rem; }
.cnl-leader-item--3 .cnl-leader-item__rank { color: #cd7f32; font-size: 1rem; }
.cnl-leader-item__avatar { width: 36px; height: 36px; border-radius: 50%; }
.cnl-leader-item__name   { flex: 1; font-size: .88rem; color: #fff; font-weight: 600; }
.cnl-leader-item__xp     { font-size: .78rem; color: var(--accent); }

/* ── Pinyin table ──────────────────────────────────────────── */
.cnl-pinyin-table { border-collapse: collapse; width: 100%; font-size: .82rem; }
.cnl-pinyin-table th, .cnl-pinyin-table td { border: 1px solid var(--border); padding: 8px 12px; text-align: center; }
.cnl-pinyin-table th { background: rgba(0,0,0,.2); color: var(--text-muted); font-size: .72rem; text-transform: uppercase; }
.cnl-pinyin-cell { cursor: pointer; transition: all var(--transition); border-radius: 4px; }
.cnl-pinyin-cell:hover { background: rgba(229,57,53,.15); color: var(--primary); }
.cnl-pinyin-cell .tone { font-size: .9em; display: block; color: #fff; font-family: var(--font-zh); }
.cnl-pinyin-cell .tone-mark { font-size: .7em; color: var(--accent); }

/* ── Footer ────────────────────────────────────────────────── */
.cnl-footer {
  background: #0a0a15; border-top: 1px solid var(--border);
  padding: 48px var(--gap) 24px; margin-top: 60px;
}
.cnl-footer__grid { display: grid; grid-template-columns: 1.5fr repeat(3,1fr); gap: var(--gap); margin-bottom: 36px; max-width: var(--container); margin-left: auto; margin-right: auto; }
.cnl-footer__brand .logo { font-size: 1.1rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.cnl-footer__brand p { font-size: .82rem; color: var(--text-muted); line-height: 1.6; }
.cnl-footer__col h4 { font-size: .85rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cnl-footer__col a  { display: block; font-size: .82rem; color: var(--text-muted); padding: 3px 0; transition: color var(--transition); }
.cnl-footer__col a:hover { color: var(--primary); }
.cnl-footer__bottom {
  max-width: var(--container); margin: 0 auto; padding-top: 20px;
  border-top: 1px solid var(--border); display: flex; align-items: center;
  justify-content: space-between; font-size: .78rem; color: var(--text-muted); flex-wrap: wrap; gap: 10px;
}

/* ── Util ──────────────────────────────────────────────────── */
.sr-only { position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); }
.text-center { text-align: center; }
.text-muted   { color: var(--text-muted); }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: 16px; }

/* ── Badges (frontend) ─────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; border-radius: 20px; font-size: .72rem; font-weight: 600; }
.badge-success { background: rgba(0,184,148,.15); color: var(--success); }
.badge-info    { background: rgba(9,132,227,.15);  color: var(--info); }
.badge-warning { background: rgba(253,203,110,.15); color: #b7922a; }
.badge-danger  { background: rgba(225,112,85,.15);  color: var(--danger); }
.badge-hsk1    { background: rgba(0,184,148,.15);  color: #00b894; }
.badge-hsk2    { background: rgba(9,132,227,.15);  color: #0984e3; }
.badge-hsk3    { background: rgba(253,203,110,.15); color: #b7922a; }
.badge-hsk4    { background: rgba(108,92,231,.15); color: var(--purple); }
.badge-hsk5    { background: rgba(225,112,85,.15); color: var(--danger); }
.badge-hsk6    { background: rgba(229,57,53,.15);  color: var(--primary); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .cnl-grid-4   { grid-template-columns: repeat(2,1fr); }
  .cnl-hsk-path-grid { grid-template-columns: repeat(2,1fr); }
  .cnl-topic-grid { grid-template-columns: repeat(3,1fr); }
  .cnl-dashboard { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .cnl-hero h1 { font-size: 2rem; }
  .cnl-grid-3, .cnl-grid-2 { grid-template-columns: 1fr; }
  .cnl-topic-grid { grid-template-columns: repeat(2,1fr); }
  .cnl-hsk-path-grid { grid-template-columns: 1fr; }
  .cnl-footer__grid { grid-template-columns: 1fr 1fr; }
  .cnl-nav { display: none; }
}
@media (max-width: 480px) {
  .cnl-hero { padding: 48px 16px; }
  .cnl-topic-grid { grid-template-columns: repeat(2,1fr); }
  .cnl-footer__grid { grid-template-columns: 1fr; }
  .cnl-badges-grid { grid-template-columns: repeat(3,1fr); }
}