*{box-sizing:border-box;-webkit-text-size-adjust:100%;}
:root{--ink:#1f2430;--muted:#5b6472;--line:#e7eaf0;--soft:#f5f6fa;
  --accent:#0f766e;--accent2:#0d7d6b;--accent3:#3949ab;--hi:#0f766e;--band:#eef7f5;--band2:#eef7f4;}
body{font-family:-apple-system,"Segoe UI","Helvetica Neue",Arial,sans-serif;color:var(--ink);
  margin:0;background:#eef0f4;font-size:16px;line-height:1.5;}
a{color:var(--accent);text-decoration:none;}
.sc{font-family:"Noto Sans Devanagari","Noto Sans HK","Noto Sans Arabic","Noto Sans Thai",
  "Noto Sans JP","Noto Sans KR","PingFang HK","Hiragino Sans",sans-serif;color:var(--hi);}
.wrap{max-width:600px;margin:0 auto;background:#fff;min-height:100vh;
  padding:0 0 calc(30px + env(safe-area-inset-bottom));}
.pad{padding:0 18px;}

/* top bar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;
  border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);z-index:10;}
.topbar .brand{font-weight:800;letter-spacing:-.3px;color:var(--ink);font-size:16px;}
.topbar .brand span{color:var(--accent);}
.topbar a.coffee{font-size:13px;font-weight:700;background:var(--accent);color:#fff;
  padding:7px 12px;border-radius:20px;}

/* hero (landing) */
.hero{padding:30px 18px 8px;}
.kick{display:inline-block;background:var(--band);color:var(--accent);border:1px solid #cfe8e2;
  border-radius:20px;padding:4px 12px;font-size:12px;font-weight:700;letter-spacing:.3px;}
h1{font-size:32px;line-height:1.12;margin:12px 0 8px;letter-spacing:-.6px;}
.hero p.lead{color:var(--muted);font-size:16px;margin:0 0 16px;}
.cta{display:inline-block;background:var(--accent);color:#fff;font-weight:700;padding:12px 20px;
  border-radius:12px;font-size:16px;margin:4px 6px 4px 0;}
.cta.ghost{background:#fff;color:var(--accent);border:1.5px solid var(--accent);}

/* how it works */
.steps{display:grid;grid-template-columns:1fr;gap:10px;margin:10px 0;}
.step{border:1px solid var(--line);border-radius:14px;padding:13px 15px;background:#fff;}
.step .num{display:inline-flex;width:24px;height:24px;background:var(--accent);color:#fff;
  border-radius:50%;align-items:center;justify-content:center;font-weight:700;font-size:13px;margin-right:8px;}
.step b{font-size:15px;}
.step p{margin:6px 0 0;color:var(--muted);font-size:14px;}

/* language grid */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0;}
.lang{border:1px solid var(--line);border-radius:16px;padding:15px;background:#fff;display:block;
  transition:transform .1s ease,box-shadow .1s ease;}
.lang:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(20,30,50,.08);}
.lang .flag{font-size:30px;}
.lang .nm{font-weight:800;font-size:18px;margin-top:6px;color:var(--ink);}
.lang .nat{font-size:15px;margin-top:1px;}
.lang .meta{color:var(--muted);font-size:12px;margin-top:8px;}
.lang.soon{opacity:.55;pointer-events:none;}
.lang.soon .tag{font-size:10px;background:var(--soft);border:1px solid var(--line);
  border-radius:20px;padding:2px 8px;color:var(--muted);}

/* section shells (lesson) */
h2{font-size:19px;margin:28px 0 4px;color:var(--accent);display:flex;align-items:center;gap:10px;}
h2 .n{flex:0 0 auto;font-size:14px;background:var(--accent);color:#fff;border-radius:50%;
  min-width:26px;height:26px;padding:0 7px;display:flex;align-items:center;justify-content:center;font-weight:700;}
.hr{height:2px;background:var(--accent);border-radius:2px;margin:0 0 10px;opacity:.9;}
h3{font-size:14px;margin:16px 0 4px;color:var(--accent3);text-transform:uppercase;letter-spacing:.4px;}
.note{font-size:14px;color:var(--muted);font-style:italic;margin:6px 0 10px;}
.lede{background:var(--band);border:1px solid #cfe8e2;border-radius:14px;padding:15px 16px;margin:14px 0 4px;}
.lede p{margin:8px 0;}.lede p:first-child{margin-top:0;}.lede p:last-child{margin-bottom:0;}.lede b{color:var(--accent);}

.list{border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:8px 0;}
.entry{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:11px 14px;border-bottom:1px solid var(--line);}
.entry:last-child{border-bottom:none;}.entry:nth-child(even){background:#fcfcfd;}
.entry .l{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;min-width:0;}
.entry .rom{font-weight:700;font-size:16px;}.entry .sc{font-size:20px;white-space:nowrap;}
.entry .r{color:var(--muted);text-align:right;font-size:14px;flex:0 0 auto;max-width:46%;}
.list.stack .entry{flex-direction:column;align-items:flex-start;gap:3px;}
.list.stack .entry .r{max-width:100%;text-align:left;}.list.stack .entry .r .sc{font-size:18px;}

.tone{display:flex;align-items:center;gap:12px;padding:11px 14px;border-bottom:1px solid var(--line);}
.tone:last-child{border-bottom:none;}
.tone .tn{flex:0 0 30px;height:30px;background:var(--accent);color:#fff;border-radius:8px;
  font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;}
.tone .mid{flex:1;min-width:0;}.tone .mid .nm{font-weight:700;}
.tone .eg{flex:0 0 auto;text-align:right;font-size:14px;color:var(--muted);}.tone .eg .sc{font-size:20px;}
.contour{font-family:monospace;color:var(--accent2);font-weight:700;letter-spacing:-1px;}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0;}
.chip{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:8px 11px;font-size:15px;}
.chip b{color:var(--accent);}.chip .sc{font-size:19px;}.chip .k{font-weight:800;color:var(--accent);margin-right:4px;}

.rule{display:flex;gap:11px;align-items:flex-start;border:1px solid var(--line);border-radius:14px;padding:12px 13px;margin:9px 0;background:#fff;}
.rule .b{flex:0 0 26px;height:26px;background:var(--accent2);color:#fff;border-radius:8px;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px;}
.rule .t{flex:1;min-width:0;}
.ex{background:var(--soft);border-left:3px solid var(--accent2);padding:7px 11px;margin-top:7px;border-radius:0 8px 8px 0;font-size:15px;}.ex .sc{font-size:19px;}

.tpl{border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin:9px 0;background:#fff;}
.tpl .head{font-weight:700;color:var(--accent3);font-size:16px;}.tpl .head .sc{color:var(--accent3);font-size:20px;}
.tpl .mean{margin:5px 0 3px;}.tpl .fill{color:var(--muted);font-size:13.5px;}

.card{border:1px solid var(--line);border-radius:14px;padding:14px 15px;background:#fff;margin:10px 0;}
.card.g{background:var(--band2);border-color:#d5ebe4;}.card.g h3{color:var(--accent2);}.card h3{margin-top:0;}

ol.practice{padding-left:22px;margin:8px 0;}ol.practice li{margin:14px 0;}
.blank{display:block;border-bottom:2px solid #c4cad4;height:26px;margin-top:6px;border-radius:2px;}
.answers{background:var(--soft);border-radius:12px;padding:13px 15px;font-size:14px;color:var(--muted);margin-top:10px;}
.answers b{color:var(--ink);}.answers .sc{font-size:16px;}

.plan{border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:10px 0;}
.plan .ph{background:var(--accent3);color:#fff;padding:10px 14px;font-weight:700;font-size:16px;}
.plan .pb{padding:6px 16px 12px;}.plan ul{margin:8px 0;padding-left:20px;}.plan li{margin:7px 0;}

/* conversion blocks */
.promo{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-radius:16px;
  padding:18px;margin:18px 0;}
.promo h3{color:#fff;margin:0 0 6px;text-transform:none;letter-spacing:0;font-size:18px;}
.promo p{margin:0 0 12px;opacity:.95;font-size:14px;}
.promo a.btn{display:inline-block;background:#fff;color:var(--accent);font-weight:800;padding:11px 18px;border-radius:11px;}
.email{border:1px solid var(--line);border-radius:16px;padding:16px;background:#fff;margin:16px 0;}
.email b{font-size:16px;}.email p{margin:4px 0 10px;color:var(--muted);font-size:14px;}
.email form{display:flex;gap:8px;flex-wrap:wrap;}
.email input{flex:1;min-width:180px;padding:11px 12px;border:1px solid var(--line);border-radius:11px;font-size:15px;}
.email button{background:var(--accent);color:#fff;border:none;font-weight:700;padding:11px 16px;border-radius:11px;font-size:15px;cursor:pointer;}

.foot{border-top:1px solid var(--line);margin-top:24px;padding:16px 18px;color:#9aa2b1;font-size:12px;text-align:center;}
.foot a{color:#7b8494;}
.backlink{display:inline-block;margin:14px 0 0;font-size:14px;font-weight:600;}