/* ============================================================
   Design System: UrduChinese — Modern Green & Clean
   Urdu RTL + Chinese LTR mixed typography
   ============================================================ */
:root {
  color-scheme: light;
  --color-primary: #065f46;
  --color-primary-strong: #047857;
  --color-secondary: #059669;
  --color-accent: #d97706;
  --color-accent-strong: #b45309;
  --color-on-accent: #ffffff;
  --color-on-primary: #ffffff;
  --color-background: #fefdf8;
  --color-foreground: #1c1917;
  --color-card: #ffffff;
  --color-muted: #f0fdf4;
  --color-muted-fg: #57534e;
  --color-border: #d1e7dd;
  --color-ring: #059669;
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px;
  --space-xl: 32px; --space-2xl: 48px; --space-3xl: 64px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 24px rgba(0,0,0,.10);
  --bg: var(--color-background);
  --surface: var(--color-card);
  --surface-soft: var(--color-muted);
  --text: var(--color-foreground);
  --muted: var(--color-muted-fg);
  --border: var(--color-border);
  --primary: var(--color-primary);
  --primary-strong: var(--color-primary-strong);
  --primary-soft: #ecfdf5;
  --accent: var(--color-accent);
  --accent-soft: #fffbeb;
  --radius: 12px; --radius-lg: 16px; --radius-pill: 999px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --color-background: #0a0a0a;
  --color-foreground: #e7e5e4;
  --color-card: #1a1a1a;
  --color-muted: #162018;
  --color-muted-fg: #a8a29e;
  --color-border: #292524;
  --color-primary: #34d399;
  --color-accent: #fbbf24;
  --primary-strong: #6ee7b7;
  --primary-soft: rgba(52,211,153,.08);
  --accent-soft: rgba(251,191,36,.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,.35);
  --shadow-lg: 0 12px 24px rgba(0,0,0,.4);
}

*, *,::before,::after { box-sizing: border-box; }
html { min-width:320px; background:var(--bg); scroll-behavior:smooth; }

body {
  margin:0; min-height:100vh;
  font-family:"Noto Naskh Arabic","Noto Nastaliq Urdu","Outfit","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg); color:var(--text); line-height:1.8;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
h1,h2,h3,h4 { font-family:"Noto Nastaliq Urdu","Noto Naskh Arabic",serif; line-height:1.6; margin:0 0 .5em; }
a { color:var(--primary); text-decoration:none; transition:color .15s; }
a:hover { color:var(--primary-strong); text-decoration:underline; text-decoration-color:var(--border); }
img,svg { max-width:100%; vertical-align:middle; }
button { font-family:inherit; cursor:pointer; }
input,select,textarea { font-family:inherit; font-size:inherit; }

.container { max-width:1200px; margin-inline:auto; padding-inline:20px; }
[dir="rtl"] .container { padding-right:20px; padding-left:20px; }

/* Skip link */
.skip-link{position:fixed;top:-64px;left:16px;z-index:999;padding:8px 16px;background:var(--primary);color:#fff;border-radius:0 0 var(--radius) 0;}
.skip-link:focus{top:16px;}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb, var(--surface) 92%, transparent);backdrop-filter:saturate(1.2) blur(10px);-webkit-backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid var(--border);box-shadow:0 1px 0 var(--border), var(--shadow-sm);}
.header-inner{display:flex;align-items:center;gap:var(--space-lg);padding-block:12px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none!important;color:var(--text)!important;}
.brand-mark{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-primary),#059669);color:#fff;font-size:22px;font-weight:700;border-radius:var(--radius);font-family:"Noto Sans SC","system-ui",sans-serif;}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.brand-name{font-weight:700;font-size:18px;font-family:"Noto Nastaliq Urdu",serif;}
.brand-tagline{font-size:11px;color:var(--muted);font-family:"Outfit",sans-serif;}
.main-nav{display:flex;gap:var(--space-md);margin-inline-start:auto;}
.main-nav a{padding:10px 14px;min-height:44px;display:inline-flex;align-items:center;border-radius:var(--radius-pill);font-size:14px;font-weight:600;color:var(--muted);transition:.2s;border:1px solid transparent;}
.main-nav a:hover,.main-nav a[aria-current="page"]{background:var(--primary-soft);color:var(--primary);}
.header-actions{display:flex;gap:var(--space-sm);}
.icon-btn{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border);border-radius:50%;color:var(--muted);transition:.2s;}
.icon-btn:hover{background:var(--primary-soft);color:var(--primary);border-color:var(--primary);}

/* Search */
.search-bar{position:absolute;top:100%;right:0;left:0;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);padding:16px 0;}
.search-bar input{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:16px;outline:none;transition:border .2s;}
.search-bar input:focus{border-color:var(--primary);}
.search-results{margin-top:12px;max-height:60vh;overflow-y:auto;}
.search-result-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--border);text-decoration:none!important;color:var(--text)!important;transition:.15s;}
.search-result-item:hover{background:var(--primary-soft);}
.search-result-hanzi{font-size:20px;font-weight:700;min-width:48px;font-family:"Noto Sans SC",sans-serif;}
.search-result-pinyin{font-size:13px;color:var(--accent);direction:ltr;}
.search-result-urdu{font-size:14px;margin-inline-start:auto;color:var(--muted);}

/* Hero */
/* ========== HERO — World Class (ui-ux-pro-max) ========== */
.hero{
  position:relative;
  padding:clamp(52px,7vw,96px) 0 clamp(44px,6vw,72px);
  background: linear-gradient(180deg, #ecfdf5 0%, #f0fdf4 45%, var(--bg) 100%);
  border-bottom:1px solid var(--border);
  overflow:visible;
}
.hero::before{
  content:""; position:absolute; inset:0;
  background: radial-gradient(ellipse 820px 300px at 50% -40px, rgba(5,150,105,.14), transparent 68%);
  pointer-events:none;
}
.hero-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(340px,460px);
  align-items:center;
  gap:clamp(32px,5vw,72px);
}
.hero-copy{ text-align:start; max-width:760px; }
.hero-badge{
  display:inline-flex; align-items:center; gap:8px;
  background: color-mix(in srgb, #fff 78%, transparent);
  border:1px solid color-mix(in srgb, var(--primary) 22%, var(--border));
  border-radius:999px; padding:8px 14px;
  font-size:.88rem; font-weight:700; color:var(--primary);
  box-shadow:var(--shadow-sm); backdrop-filter:blur(10px);
  margin-bottom:22px; line-height:1;
}
[data-theme="dark"] .hero-badge{ background: color-mix(in srgb, var(--surface) 74%, transparent); }
.hero h1{
  margin:0 0 18px;
  font-family:"Noto Nastaliq Urdu","Noto Naskh Arabic",serif;
  font-size:clamp(2.2rem, 5.2vw, 3.6rem);
  line-height:1.28; font-weight:800; color:var(--text);
}
.hero-accent{
  position:relative; display:inline-block; color:var(--primary);
}
.hero-accent::after{
  content:""; display:block; height:6px; margin-top:6px; border-radius:99px;
  background: linear-gradient(90deg, var(--primary), var(--color-accent));
  opacity:.9;
}
.hero-desc{
  max-width:640px; margin:0 0 28px;
  color:var(--muted); font-size:clamp(1rem,1.4vw,1.14rem); line-height:1.9;
}
.hero-actions{ display:flex; gap:12px; flex-wrap:wrap; margin-bottom:22px; }
.hero-actions .btn{ min-height:52px; padding:0 24px; border-radius:16px; font-weight:800; font-size:15px; transition:transform .2s, box-shadow .2s; }
.hero-actions .btn:hover{ transform:translateY(-1px); }
.hero-search{
  display:flex; gap:8px; max-width:640px; margin:0 0 18px;
}
.hero-search input{
  flex:1; padding:14px 16px; border:2px solid var(--border); border-radius:12px;
  background:var(--surface); color:var(--text); font-size:15px;
}
.hero-search input:focus{ outline:none; border-color:var(--primary); box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent); }
.hero-stats{ display:flex; gap:20px; flex-wrap:wrap; }
.stat{ display:flex; flex-direction:column; align-items:center; min-width:72px; }
.stat strong{ font-size:1.45rem; font-weight:800; color:var(--primary); font-variant-numeric:tabular-nums; font-family:"Outfit",sans-serif; }
.stat span{ font-size:.82rem; color:var(--muted); }
.hero-stage{
  min-height:380px; padding:22px 22px 18px;
  background: linear-gradient(145deg,#fff 0%,#f4fff8 52%,#e8fdf0 100%);
  border:1px solid var(--border); border-radius:30px;
  box-shadow:0 30px 70px rgba(6,95,70,.13);
  display:grid; align-content:center; gap:10px; justify-items:center; text-align:center;
}
[data-theme="dark"] .hero-stage{ background: linear-gradient(145deg,#151e1a,#101812); }
.stage-top{ width:100%; display:flex; justify-content:space-between; align-items:center; color:var(--muted); font-size:.8rem; font-weight:800; letter-spacing:.04em; text-transform:uppercase; }
.stage-top span:first-child{ padding:4px 9px; border-radius:99px; background:var(--primary-soft); color:var(--primary); }
.stage-character{ min-height:160px; display:grid; place-items:center; width:100%; font-family:"Noto Sans SC",sans-serif; font-size:clamp(7rem,10vw,9rem); line-height:1; color:#111827; }
[data-theme="dark"] .stage-character{ color:#f8fafc; }
.stage-pinyin{ font-size:1.4rem; font-weight:800; color:var(--primary); font-family:"Outfit",sans-serif; }
.stage-meaning{ font-size:.95rem; font-weight:700; color:var(--muted); }
.tone-scale{ width:100%; display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin:18px 0 0; padding:0; list-style:none; }
.tone-scale li{ display:grid; gap:7px; justify-items:center; }
.tone-scale i{ width:100%; height:7px; border-radius:99px; background:var(--primary-soft); display:block; }
.tone-scale li:nth-child(1) i{ background:#60a5fa; clip-path:polygon(0 55%,100% 25%,100% 75%,0 75%); }
.tone-scale li:nth-child(2) i{ background:#34d399; clip-path:polygon(0 75%,50% 20%,100% 75%,100% 75%,0 75%); }
.tone-scale li:nth-child(3) i{ background:#f59e0b; clip-path:polygon(0 30%,50% 75%,100% 30%,100% 45%,50% 90%,0 45%); }
.tone-scale li:nth-child(4) i{ background:#f87171; clip-path:polygon(0 25%,100% 75%,100% 75%,0 75%); }
.tone-scale span{ font-family:ui-monospace,monospace; font-size:.78rem; color:var(--muted); }
.stat strong{display:block;font-size:32px;font-weight:700;color:#fbbf24;}
.stat span{font-size:13px;opacity:.85;}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;transition:.2s;text-decoration:none!important;}
.hero .btn-primary{background:#fff;color:#065f46!important;}
.hero .btn-primary:hover{background:#ecfdf5;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.15);}
.hero .btn-outline{background:transparent;color:var(--primary)!important;border:2px solid var(--primary);}
[data-theme="dark"] .hero .btn-outline{color:#fff!important;border-color:rgba(255,255,255,.4);}
.hero .btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1);}
.btn-lg{padding:14px 32px;font-size:16px;}

/* Sections */
.section{padding:56px 0;}
.section-alt{background:var(--surface-soft);}
.section-title{font-size:clamp(22px,3.5vw,30px);margin-bottom:24px;text-align:center;font-family:"Noto Nastaliq Urdu",serif;color:var(--text);}
.section-desc{text-align:center;color:var(--muted);max-width:680px;margin:-16px auto 28px;font-size:15px;line-height:1.9;}
.section-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px;}
.section-header .section-title{margin-bottom:0;text-align:right;}
.see-all{font-size:14px;font-weight:600;white-space:nowrap;}

/* Quick links */
.quick-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;}
.quick-card{display:flex;flex-direction:column;align-items:center;gap:10px;padding:24px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);text-align:center;text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.quick-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary);}
.quick-icon{font-size:32px;}
.quick-name{font-weight:700;font-size:15px;font-family:"Noto Nastaliq Urdu",serif;}
.quick-desc{font-size:12px;color:var(--muted);}

/* Word cards */
.word-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;}
.word-card{display:flex;flex-direction:column;gap:6px;padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.word-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--secondary);}
.word-card-chinese{font-size:26px;font-weight:700;font-family:"Noto Sans SC",sans-serif;direction:ltr;text-align:left;}
.word-card-pinyin{font-size:14px;color:var(--accent);direction:ltr;text-align:left;}
.word-card-urdu{font-size:15px;line-height:1.7;}
.word-card-meta{display:flex;gap:6px;margin-top:auto;padding-top:10px;}

/* Badges */
.badge{display:inline-flex;padding:4px 10px;border-radius:var(--radius-pill);font-size:11px;font-weight:700;letter-spacing:.02em;}
.badge-level{background:var(--primary-soft);color:var(--primary);}
.badge-topic{background:var(--accent-soft);color:var(--accent);}

/* Phrase cards */
.phrase-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;}
.phrase-card{display:flex;flex-direction:column;gap:6px;padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.phrase-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--secondary);}
.phrase-zh{font-size:18px;font-weight:700;font-family:"Noto Sans SC",sans-serif;direction:ltr;text-align:left;}
.phrase-py{font-size:13px;color:var(--accent);direction:ltr;text-align:left;}
.phrase-urdu{font-size:14px;color:var(--muted);}

/* HSK cards */
.hsk-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;}
.hsk-card{display:flex;flex-direction:column;align-items:center;padding:24px 16px;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-lg);text-align:center;text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.hsk-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary);}
.hsk-num{width:56px;height:56px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-size:22px;font-weight:800;border-radius:50%;margin-bottom:12px;font-family:"Outfit",sans-serif;}
.hsk-title{font-weight:700;font-size:15px;}
.hsk-desc{font-size:12px;color:var(--muted);margin-top:6px;}

/* Tool cards */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;}
.tool-card{display:flex;flex-direction:column;gap:10px;padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--accent);}
.tool-icon{font-size:36px;}
.tool-name{font-weight:700;font-size:16px;font-family:"Noto Nastaliq Urdu",serif;}
.tool-desc{font-size:13px;color:var(--muted);}

/* Topic cards */
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;}
.topic-card{display:flex;align-items:flex-start;gap:14px;padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent);}
.topic-icon{font-size:28px;flex-shrink:0;}
.topic-info{flex:1;}
.topic-name{font-weight:700;font-size:15px;font-family:"Noto Nastaliq Urdu",serif;}
.topic-desc{font-size:13px;color:var(--muted);margin-top:4px;}

/* Content pages */
.content-page{padding-top:32px;padding-bottom:64px;min-height:60vh;}
.page-header{margin-bottom:32px;}
.page-header h1{font-size:clamp(24px,4vw,36px);line-height:1.5;margin-bottom:16px;}
.page-desc{font-size:16px;color:var(--muted);line-height:1.9;max-width:720px;}
.breadcrumb{padding:16px 0 0;font-size:13px;color:var(--muted);}
.breadcrumb a{color:var(--primary);font-weight:600;}

.content-section{margin-bottom:40px;}
.content-section h2{font-size:20px;padding-bottom:8px;border-bottom:2px solid var(--border);margin-bottom:16px;font-family:"Noto Nastaliq Urdu",serif;}

.meaning-card,.mnemonic-card,.mistake-card,.usage-card,.compare-card{padding:20px 24px;border-radius:var(--radius);margin-bottom:8px;}
.meaning-card{background:var(--primary-soft);border-inline-start:4px solid var(--primary);}
.mnemonic-card{background:var(--accent-soft);border-inline-start:4px solid var(--accent);}
.mistake-card{background:#fef2f2;border-inline-start:4px solid #dc2626;}
.usage-card{background:var(--surface-soft);border:1px solid var(--border);}
.compare-card{background:var(--surface-soft);border:1px dashed var(--primary);}

.meaning-text{font-size:18px;line-height:2;margin:0;font-family:"Noto Nastaliq Urdu",serif;}
.prose-content p{line-height:2;margin-bottom:16px;}
.prose-content a{font-weight:600;}

/* Word hero */
.word-hero,.phrase-hero,.char-hero{display:flex;flex-direction:column;align-items:center;gap:12px;margin:24px auto;padding:32px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);max-width:480px;box-shadow:var(--shadow-sm);}
.word-hanzi{font-size:72px;font-weight:800;font-family:"Noto Sans SC",sans-serif;line-height:1.2;}
.char-display{font-size:96px;font-weight:800;font-family:"Noto Sans SC",sans-serif;line-height:1.2;}
.phrase-hanzi{font-size:36px;font-weight:700;font-family:"Noto Sans SC",sans-serif;}
.pinyin-row{display:flex;align-items:center;gap:12px;}
.pinyin{font-size:18px;color:var(--accent);font-family:"Outfit",sans-serif;font-weight:500;}
.word-badges{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;}
.btn-audio{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;background:var(--primary-soft);border:none;border-radius:50%;color:var(--primary);transition:.2s;}
.btn-audio:hover{background:var(--primary);color:#fff;transform:scale(1.08);}

/* Examples */
.examples-list{display:flex;flex-direction:column;gap:12px;}
.example-item{display:flex;flex-direction:column;gap:6px;padding:16px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);}
.example-zh{font-size:18px;font-weight:600;font-family:"Noto Sans SC",sans-serif;direction:ltr;text-align:left;}
.example-py{font-size:14px;color:var(--accent);direction:ltr;text-align:left;font-family:"Outfit",sans-serif;}
.example-urdu{font-size:15px;line-height:1.8;}

/* Conversation */
.conversation-box{display:flex;flex-direction:column;gap:16px;}
.conv-line{display:flex;flex-direction:column;gap:4px;padding:16px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);position:relative;}
.conv-line.speaker-a{border-inline-start:4px solid var(--primary);}
.conv-line.speaker-b{border-inline-start:4px solid var(--accent);}
.conv-speaker{font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;}
.conv-zh{font-size:18px;font-weight:600;font-family:"Noto Sans SC",sans-serif;direction:ltr;text-align:left;}
.conv-py{font-size:13px;color:var(--accent);direction:ltr;text-align:left;font-family:"Outfit",sans-serif;}
.conv-urdu{font-size:14px;color:var(--muted);line-height:1.8;}

/* Grammar */
.grammar-structure{padding:16px 24px;background:var(--primary-soft);border-radius:var(--radius);margin:16px 0;}
.grammar-structure code{font-size:20px;font-weight:700;color:var(--primary);font-family:"Outfit",monospace;direction:ltr;display:block;text-align:center;}
.grammar-list{display:flex;flex-direction:column;gap:12px;}
.grammar-item{display:flex;flex-direction:column;gap:6px;padding:16px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none!important;color:var(--text)!important;}
.grammar-item:hover{border-color:var(--primary);}
.grammar-item-title{font-weight:700;font-size:16px;}
.grammar-item-desc{font-size:14px;color:var(--muted);}

/* Related section */
.related-section{margin-top:48px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;}
.related-card{padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.related-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-md);}
.related-card-zh{font-size:18px;font-weight:700;font-family:"Noto Sans SC",sans-serif;direction:ltr;text-align:left;}
.related-card-urdu{font-size:14px;color:var(--muted);margin-top:4px;}

/* Next steps */
.next-steps{margin-top:48px;padding:28px;background:linear-gradient(135deg,var(--primary-soft),var(--accent-soft));border-radius:var(--radius-lg);}
.next-steps h2{margin-bottom:16px;}
.next-links{display:flex;flex-wrap:wrap;gap:12px;}
.next-link{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-pill);font-size:14px;font-weight:600;text-decoration:none!important;color:var(--text)!important;transition:.2s;}
.next-link:hover{border-color:var(--primary);color:var(--primary)!important;transform:translateY(-1px);}

/* Search */
.search-hero{max-width:640px;margin:0 auto;text-align:center;}
.search-input{width:100%;padding:16px 24px;border:2px solid var(--border);border-radius:var(--radius-pill);background:var(--surface);color:var(--text);font-size:17px;outline:none;transition:border .2s;box-shadow:var(--shadow-sm);}
.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft);}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:760px;margin:0 auto;}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.faq-item summary{padding:16px 20px;font-weight:700;cursor:pointer;list-style:none;position:relative;padding-inline-end:40px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";position:absolute;inset-inline-end:16px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--primary);transition:.2s;}
.faq-item details[open] summary::after{content:"−";}
.faq-item p{padding:0 20px 16px;margin:0;color:var(--muted);line-height:1.9;}

/* Footer */
.site-footer{background:#0a1a12;color:#e7e5e4;margin-top:auto;padding-top:48px;}
.footer-inner{display:grid;grid-template-columns:1fr 2fr;gap:40px;padding-bottom:32px;}
.footer-brand{display:flex;flex-direction:column;gap:12px;}
.footer-brand .brand-mark{width:48px;height:48px;font-size:26px;}
.footer-title{font-size:20px;font-weight:700;font-family:"Noto Nastaliq Urdu",serif;}
.footer-desc{font-size:13px;line-height:1.9;opacity:.75;margin:0;}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.footer-col h4{font-size:14px;color:#34d399;margin-bottom:12px;font-family:"Noto Nastaliq Urdu",serif;}
.footer-col a{display:block;padding:4px 0;font-size:13px;color:#a8a29e;text-decoration:none;transition:.15s;}
.footer-col a:hover{color:#34d399;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;}
.footer-bottom-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;font-size:12px;opacity:.65;}

/* Writer canvas */
.writer-canvas{width:200px;height:200px;margin:20px auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;}
.writer-canvas svg{max-width:180px;height:180px;}

/* Quiz */
.quiz-box{padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);}
.quiz-question{font-size:18px;font-weight:700;margin-bottom:16px;font-family:"Noto Nastaliq Urdu",serif;}
.quiz-options{display:grid;gap:10px;}
.quiz-option{padding:12px 20px;background:var(--bg);border:2px solid var(--border);border-radius:var(--radius);font-size:15px;text-align:right;cursor:pointer;transition:.15s;}
.quiz-option:hover{border-color:var(--primary);}
.quiz-option.correct{border-color:#059669;background:#ecfdf5;color:#065f46;}
.quiz-option.wrong{border-color:#dc2626;background:#fef2f2;color:#991b1b;}
.quiz-score{font-size:20px;font-weight:800;text-align:center;margin-top:16px;}

/* Study plan */
.study-plan{display:grid;gap:16px;}
.study-step{display:flex;gap:16px;align-items:flex-start;padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);}
.step-num{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;font-weight:800;font-size:14px;border-radius:50%;flex-shrink:0;}
.step-content h3{font-size:15px;margin-bottom:4px;}
.step-content p{font-size:13px;color:var(--muted);margin:0;line-height:1.8;}

/* Key words in conversations */
.key-words-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;}
.key-word{display:flex;flex-direction:column;gap:4px;padding:14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none!important;color:var(--text)!important;}
.key-word-zh{font-size:20px;font-weight:700;font-family:"Noto Sans SC",sans-serif;direction:ltr;text-align:left;}
.key-word-py{font-size:12px;color:var(--accent);direction:ltr;text-align:left;}
.key-word-urdu{font-size:13px;color:var(--muted);}

/* Responsive */
@media (max-width:900px){
  .main-nav{display:none;}
  .header-inner{justify-content:space-between;}
  .footer-inner{grid-template-columns:1fr;}
  .footer-links{grid-template-columns:1fr 1fr;}
}
@media (max-width:600px){
  .hero{padding:40px 0;}
  .hero-stats{gap:20px;}
  .stat strong{font-size:24px;}
  .word-grid,.phrase-grid,.tool-grid{grid-template-columns:1fr;}
  .hsk-cards{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));}
  .quick-grid{grid-template-columns:repeat(2,1fr);}
  .footer-links{grid-template-columns:1fr;}
  .section{padding:36px 0;}
  .word-hero{padding:24px;}
  .word-hanzi{font-size:56px;}
  .char-display{font-size:72px;}
}

@media print{
  .site-header,.site-footer,.ad-slot,.btn-audio,.icon-btn{display:none!important;}
  body{background:#fff;color:#000;}
}

/* Utility */
.text-center{text-align:center;}
.mt-auto{margin-top:auto;}
.hidden{display:none!important;}

/* === Enhanced Animations & Polish === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.word-card, .phrase-card, .tool-card, .quick-card, .hsk-card, .topic-card {
  animation: fadeInUp .4s ease-out both;
}
.word-card:nth-child(2), .phrase-card:nth-child(2) { animation-delay: .05s; }
.word-card:nth-child(3), .phrase-card:nth-child(3) { animation-delay: .1s; }
.word-card:nth-child(4), .phrase-card:nth-child(4) { animation-delay: .15s; }

.hero-badge { animation: pulse 2s ease-in-out infinite; }

.btn-primary {
  position: relative; overflow: hidden;
}
.btn-primary::after {
  content: ""; position: absolute; top: 0; left: -100%;
  width: 200%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  transition: left .5s;
}
.btn-primary:hover::after { left: 100%; }

/* Smooth scroll */
html { scroll-behavior: smooth; }

/* Better focus states */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Accessible helper text */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading skeleton for search results */
.search-results.is-loading::after {
  content: "";
  display: block;
  height: 48px;
  border-radius: var(--radius);
  background: linear-gradient(90deg, var(--surface-soft) 25%, var(--border) 50%, var(--surface-soft) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* Print optimization */
@media print {
  * { animation: none !important; transition: none !important; }
}

/* === HSK Test Styles === */
.test-progress { height: 6px; background: var(--border); border-radius: 3px; margin-bottom: 16px; overflow: hidden; }
.test-progress-bar { height: 100%; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 3px; transition: width .3s; }
.test-counter { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.test-hint { text-align: center; color: var(--muted); margin-bottom: 20px; }
.test-results { text-align: center; padding: 32px 0; }
.test-score-circle {
  width: 120px; height: 120px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; font-size: 28px; font-weight: 800;
  margin: 0 auto 20px;
}
.test-results .btn { display: inline-flex; margin-top: 16px; padding: 12px 32px; background: var(--primary); color: #fff !important; border: none; border-radius: var(--radius); font-weight: 600; cursor: pointer; }

/* === HSK Mock Timer — World-class (ui-ux-pro-max: accessibility + performance) === */
.hsk-mock-intro{padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:16px}
.hsk-mock-intro p{margin:6px 0}
.hsk-timer-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;box-shadow:var(--shadow-sm);flex-wrap:wrap}
.hsk-timer-bar[hidden]{display:none !important}
.hsk-timer-left{display:flex;align-items:center;gap:10px;font-weight:700}
.hsk-timer-icon{width:32px;height:32px;display:grid;place-items:center;background:var(--color-muted);border-radius:8px;color:var(--color-primary)}
.hsk-timer-label{font-size:14px;color:var(--muted)}
.hsk-timer-display{font-family:"Outfit",ui-monospace,monospace;font-size:1.4rem;font-weight:800;letter-spacing:.04em;background:var(--bg);padding:6px 12px;border-radius:10px;border:1px solid var(--border);min-width:92px;text-align:center;direction:ltr}
.hsk-timer-bar.is-warning .hsk-timer-display{background:#fff7ed;border-color:#fed7aa;color:#c2410c}
.hsk-timer-bar.is-urgent .hsk-timer-display{background:#dc2626;color:#fff;border-color:#991b1b;animation:hskPulse 1s infinite}
@keyframes hskPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.03)}}
@media(prefers-reduced-motion:reduce){.hsk-timer-bar.is-urgent .hsk-timer-display{animation:none}}
.hsk-timer-right{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.hsk-timer-count{font-size:13px;color:var(--muted);font-weight:600;min-width:90px;text-align:center}
.hsk-timer-progress{width:120px;height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.hsk-timer-progress-bar{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:3px;transition:width .3s,width .5s linear}
.hsk-timer-bar.is-warning .hsk-timer-progress-bar{background:linear-gradient(90deg,#f59e0b,#ea580c)}
.hsk-timer-bar.is-urgent .hsk-timer-progress-bar{background:#dc2626}
.hsk-test-start{text-align:center;padding:32px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:16px}
.hsk-test-start[hidden]{display:none !important}
.hsk-start-icon{font-size:40px;margin-bottom:8px}
.hsk-test-start h3{font-size:20px;font-weight:800;margin:8px 0}
.hsk-start-meta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;list-style:none;padding:0;margin:12px 0 18px;color:var(--muted)}
.hsk-start-meta li{background:var(--color-muted);padding:6px 12px;border-radius:999px;font-size:13px;color:var(--text)}
.hsk-start-meta strong{color:var(--color-primary)}
.hsk-start-btn{min-height:48px;min-width:44px;padding:0 24px;font-size:16px}
@media(max-width:640px){.hsk-timer-bar{flex-direction:column;align-items:stretch}.hsk-timer-right{justify-content:space-between;width:100%}.hsk-timer-progress{flex:1}}


/* === World-class UI Polish === */

/* Improved card hover with subtle lift + shadow */
.word-card, .phrase-card, .tool-card {
  position: relative;
  overflow: hidden;
}
.word-card::before, .phrase-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: transform .3s ease;
}
.word-card:hover::before, .phrase-card:hover::before {
  transform: scaleX(1);
}

/* Better typography for Chinese display */
.word-hanzi, .char-display {
  text-shadow: 0 2px 8px rgba(6,95,70,.1);
}

/* Smooth section transitions */
.section { scroll-margin-top: 80px; }

/* Enhanced search results */
.search-result-item {
  border-radius: var(--radius);
  margin-bottom: 4px;
  border: 1px solid transparent;
}
.search-result-item:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

/* Better mobile nav */
@media (max-width:900px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%; right: 0; left: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 16px;
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }
  .main-nav.open { display: flex; }
}

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* Selection color */
::selection { background: var(--primary-soft); color: var(--primary-strong); }

/* Focus improvements */
.btn:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 3px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

.nav-toggle-btn { display: none; }
@media (max-width:900px) {
  .nav-toggle-btn { display: flex; }
}

.search-results mark {
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 0 2px;
  border-radius: 3px;
}


/* Unified search results */
.search-result-item {
  display: grid;
  grid-template-columns: minmax(110px, auto) minmax(0, 1fr);
  gap: 10px 16px;
  align-items: center;
  min-height: 56px;
  padding: 12px 14px;
}
.result-main {
  display: flex;
  align-items: baseline;
  gap: 10px;
  direction: ltr;
}
.result-main .search-result-hanzi {
  min-width: 0;
  overflow-wrap: anywhere;
}
.search-result-urdu {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  text-align: right;
}
.result-type {
  align-self: flex-start;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
}
.search-result-pinyin,
.search-result-urdu {
  overflow-wrap: anywhere;
}
.search-empty {
  margin: 0;
  padding: 16px;
  color: var(--muted);
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

@media (max-width: 620px) {
  .search-result-item {
    grid-template-columns: 1fr;
    align-items: start;
    text-align: right;
  }
  .result-main {
    flex-wrap: wrap;
  }
  .result-type {
    order: -1;
  }
}

.quiz-option:disabled {
  cursor: not-allowed;
  opacity: .82;
}
.quiz-review {
  margin: 24px auto 8px;
  max-width: 520px;
  padding: 16px;
  text-align: right;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.quiz-review h3 { font-size: 16px; }
.quiz-review p { margin: 6px 0; color: var(--muted); }

.topic-card[hidden] { display: none !important; }

.filter-toolbar {
  display: grid;
  gap: 20px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.search-field,
.select-field {
  display: grid;
  gap: 8px;
}
.search-field label,
.select-field label,
.filter-group legend {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}
.search-field input,
.select-field select {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  background: var(--bg);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius);
}
.search-field input:focus,
.select-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.filter-group {
  margin: 0;
  padding: 0;
  border: 0;
}
.filter-group legend {
  padding: 0;
  margin-bottom: 8px;
  line-height: 1.4;
}
#conversation-category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.filter-chip {
  min-height: 44px;
  padding: 10px 16px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: border-color .15s, background-color .15s, color .15s;
}
.filter-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.filter-chip[aria-pressed="true"] {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.result-count {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}
.topic-card .topic-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.empty-state {
  padding: 40px 28px;
  text-align: center;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}
.empty-state strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}
.empty-state .btn {
  margin-top: 16px;
}

@media (min-width: 760px) {
  .filter-toolbar {
    grid-template-columns: minmax(240px, 1fr) minmax(0, 1fr);
    align-items: start;
  }
  .select-field {
    max-width: 260px;
  }
}

.tool-icon svg {
  width: 36px;
  height: 36px;
}

.learning-status-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--primary);
  border-radius: var(--radius);
}
#word-progress-status {
  margin: 0 0 6px;
  font-weight: 700;
}
.progress-warning {
  margin: 0;
  color: #991b1b;
  font-size: 14px;
}

.progress-dashboard {
  min-height: 320px;
}
.progress-loading,
.storage-warning {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.storage-warning {
  color: #991b1b;
  font-weight: 700;
}
.progress-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.progress-stat {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.progress-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.progress-stat strong {
  display: block;
  color: var(--primary);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.2;
  font-family: "Outfit", sans-serif;
  font-variant-numeric: tabular-nums;
}
.progress-stat small {
  display: block;
  margin-top: 5px;
  color: var(--muted);
}
.hsk-progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.hsk-progress-item {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.hsk-progress-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.progress-track {
  height: 10px;
  overflow: hidden;
  background: var(--surface-soft);
  border-radius: 999px;
}
.progress-track span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: inherit;
}
.progress-controls {
  display: flex;
  align-items: end;
  gap: 14px;
  flex-wrap: wrap;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.progress-controls .select-field {
  min-width: 170px;
}
.btn-outline-dark,
.danger-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
}
.btn-outline-dark {
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--bg);
}
.btn-outline-dark:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.danger-button {
  color: #991b1b;
  border: 1px solid #fecaca;
  background: #fef2f2;
}
.danger-button:hover {
  background: #fee2e2;
}
.file-field {
  display: grid;
  gap: 8px;
  min-height: 68px;
  padding: 10px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}
.file-field span {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}
.file-field input {
  max-width: 280px;
}
.learned-word-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 12px;
}
.learned-word-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.learned-word-main a {
  font-weight: 700;
  overflow-wrap: anywhere;
}
.learned-word-main small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}
.remove-learned {
  min-height: 36px;
  padding: 7px 12px;
  color: #991b1b;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-pill);
  cursor: pointer;
}
.remove-learned:hover {
  background: #fee2e2;
}
.quiz-result-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}
.quiz-result-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.quiz-result-list strong {
  min-width: 62px;
  color: var(--primary);
  font-size: 20px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.quiz-result-list small {
  color: var(--muted);
}

@media (max-width: 640px) {
  .learning-status-card,
  .learned-word-card {
    flex-direction: column;
    align-items: stretch;
  }
  .progress-controls {
    align-items: stretch;
  }
  .progress-controls > * {
    width: 100%;
  }
  .file-field input {
    max-width: none;
  }
  .quiz-result-list li {
    grid-template-columns: 1fr;
    text-align: right;
  }
}

/* ========== ADS — Smart Slots (Adsterra friendly, CLS safe) ========== */
.ad-slot{ position:relative; min-height:90px; border:1px dashed color-mix(in srgb, var(--border) 88%, var(--muted)); border-radius:12px; background: color-mix(in srgb, var(--surface-soft) 78%, transparent); display:flex; align-items:center; justify-content:center; margin:24px 0; overflow:hidden; content-visibility:auto; contain-intrinsic-size: 728px 90px; }
.ad-slot:empty{ display:none; }
.ad-label{ position:absolute; top:6px; inset-inline-start:8px; font-size:.68rem; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); background:var(--surface); border:1px solid var(--border); border-radius:999px; padding:2px 7px; font-weight:700; }
.ad-slot.ad-sidebar{ min-height:250px; }
.ad-slot.ad-leaderboard{ min-height:110px; }
.ad-slot.ad-inarticle{ min-height:180px; }
.ad-slot.ad-infeed{ min-height:160px; }
.ad-slot.ad-inline{ min-height:90px; }
.ad-slot.ad-unfilled{ display:none !important; }
.ad-slot.ad-active .ad-label{ display:none; }
.ad-slot.ad-filled{ display:flex; min-height:90px; margin:14px 0; border:0; background:none; }
.ad-slot.ad-filled .ad-label{ display:none; }
.ad-slot:not(.ad-active){ display:none !important; }

/* ========== Category & Quick Grids ========== */
.category-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:16px; }
.category-card{ display:flex; align-items:flex-start; gap:14px; padding:20px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg); text-decoration:none!important; color:var(--text)!important; transition:transform .2s, box-shadow .2s, border-color .2s; }
.category-card:hover{ transform:translateY(-2px); box-shadow:var(--shadow-md); border-color:var(--primary); }
.category-card-icon{ width:44px; height:44px; display:grid; place-items:center; background:var(--primary-soft); color:var(--primary); border-radius:12px; flex-shrink:0; }
.category-card-name{ font-weight:800; font-size:15px; }
.category-card-desc{ font-size:13px; color:var(--muted); margin-top:4px; line-height:1.6; }

/* ========== Buttons — World Class ========== */
.btn{ display:inline-flex; align-items:center; justify-content:center; min-height:44px; padding:0 22px; border-radius:999px; font-weight:700; border:1px solid transparent; cursor:pointer; text-decoration:none; transition:all .16s; }
.btn:hover{ text-decoration:none; transform:translateY(-1px); }
.btn-primary{ background:var(--primary); color:#fff; box-shadow:0 6px 18px rgba(6,95,70,.22); }
.btn-primary:hover{ background:var(--primary-strong); color:#fff; box-shadow:0 10px 24px rgba(6,95,70,.28); }
.btn-outline{ background:var(--surface); color:var(--text); border-color:var(--border); }
.btn-outline:hover{ border-color:var(--primary); color:var(--primary); }
.btn-lg{ min-height:52px; padding:0 26px; border-radius:16px; font-weight:800; }
.btn-small{ min-height:36px; padding:0 14px; font-size:13px; border-radius:999px; }
.btn-ghost{ background:transparent; border-color:var(--border); }

/* ========== Quick Grid ========== */
.quick-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:14px; }
.quick-card{ display:flex; align-items:center; gap:12px; padding:16px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); text-decoration:none!important; color:var(--text)!important; transition:.2s; }
.quick-card:hover{ border-color:var(--primary); transform:translateY(-2px); box-shadow:var(--shadow-sm); }
.quick-icon{ width:40px; height:40px; display:grid; place-items:center; background:var(--primary-soft); color:var(--primary); border-radius:10px; font-size:18px; flex-shrink:0; }

/* ========== Word Page — Premium ========== */
.word-page{ max-width:860px; margin:0 auto; }
.word-main-card{ display:grid; gap:16px; padding:28px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg); box-shadow:var(--shadow-sm); }
.word-chinese-wrap{ display:flex; align-items:center; gap:12px; justify-content:center; }
.word-chinese{ font-family:"Noto Sans SC",sans-serif; font-size:clamp(3rem, 10vw, 4.5rem); font-weight:800; line-height:1; }
.word-pinyin{ font-family:"Outfit",sans-serif; font-size:1.2rem; font-weight:600; color:var(--primary); letter-spacing:.02em; }
.word-arabic{ font-size:1.1rem; color:var(--muted); line-height:1.8; text-align:center; }
.word-meta{ display:flex; gap:8px; justify-content:center; flex-wrap:wrap; }
.word-actions{ display:flex; gap:8px; justify-content:center; flex-wrap:wrap; margin-top:8px; }
.hsk-badge{ background:#065f46; color:#fff; }
.pos-badge{ background:#fef3c7; color:#92400e; }
.topic-badge{ background:#ecfdf5; color:#065f46; }
.char-breakdown{ padding:20px; background:var(--surface-soft); border-radius:var(--radius); }
.chars-grid{ display:flex; gap:10px; flex-wrap:wrap; justify-content:center; margin-top:12px; }
.char-mini{ width:64px; height:64px; display:grid; place-items:center; background:var(--surface); border:1px solid var(--border); border-radius:12px; font-family:"Noto Sans SC",sans-serif; font-size:28px; text-decoration:none!important; color:var(--text)!important; transition:.15s; }
.char-mini:hover{ border-color:var(--primary); transform:translateY(-2px); }

/* ========== A11y & Motion ========== */
:focus-visible{ outline:2px solid var(--primary); outline-offset:2px; }
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
  .word-card:hover, .phrase-card:hover, .tool-card:hover, .category-card:hover, .quick-card:hover{ transform:none; }
}

/* ========== Responsive — Mobile First ========== */
@media (max-width: 960px){
  .hero-shell{ grid-template-columns:1fr; }
  .hero-stage{ max-width:520px; margin-inline:auto; order:-1; min-height:360px; }
  .hero-copy{ max-width:720px; }
}
@media (max-width: 720px){
  .container{ padding-inline:16px; }
  .hero{ padding:36px 0 32px; }
  .hero h1{ font-size:clamp(1.9rem, 8vw, 2.6rem); }
  .hero-search{ flex-direction:column; }
  .hero-search .btn{ width:100%; }
  .stage-character{ min-height:135px; font-size:6rem; }
  .tone-scale{ gap:6px; }
  .word-main-card{ padding:20px; }
}
/* Performance: content-visibility for long grids */
.word-grid, .phrase-grid, .topic-grid, .grammar-list, .character-grid {
  content-visibility: auto;
  contain-intrinsic-size: 1px 600px;
}
/* Accessibility: respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* New Tools Polish */
.flashcard { padding:32px; text-align:center; background:var(--surface); border:2px solid var(--border); border-radius:var(--radius-lg); min-height:200px; display:grid; place-items:center; }
.flashcard-zh { font-size:56px; font-weight:800; font-family:"Noto Sans SC",sans-serif; line-height:1; }
.flashcard-py { font-size:18px; color:var(--accent); margin-top:8px; }
.flashcard-ur { font-size:16px; color:var(--muted); margin-top:4px; }
#flashcard-app .btn { margin-top:16px; }
#sentence-parts { display:flex; flex-wrap:wrap; gap:8px; }
#sentence-parts button { min-height:44px; }
#sentence-result { margin-top:16px; padding:16px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); text-align:center; }
#cn-num-result { margin-top:16px; }

/* Conversation grid on homepage */
.conversation-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
@media (max-width: 600px) { .conversation-grid { grid-template-columns: 1fr; } }