*{box-sizing:border-box;margin:0;padding:0;}
html,body{min-height:100%;height:auto;background:#F7F5F0;font-family:'DM Sans',sans-serif;}
body{display:flex;justify-content:center;align-items:flex-start;min-height:100vh;overflow-x:hidden;}

.app{
  width:100%;
  max-width:460px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  margin:0 auto;
  background:#F7F5F0;
  position:relative;
}





.screen{display:none;flex-direction:column;min-height:100%;flex:1 0 auto;}
.screen.active{display:flex;}

/* ── TYPOGRAPHY ── */
.hz{font-family:'Noto Sans SC',sans-serif;}
.red{color:#E24B4A;}

/* ── HEADER ── */
.top-bar{padding:48px 28px 0;display:flex;align-items:baseline;gap:7px;}
.logo-hz{font-family:'Noto Sans SC',sans-serif;font-size:22px;font-weight:700;color:#1a1a1a;}
.logo-word{font-size:18px;font-weight:600;color:#1a1a1a;letter-spacing:-.02em;}
.logo-dot{width:6px;height:6px;border-radius:50%;background:#E24B4A;display:inline-block;margin-bottom:3px;}

.screen-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:52px 28px 0;
}
.screen-title{font-size:13px;font-weight:600;color:#7A7268;letter-spacing:.08em;text-transform:uppercase;}
.train-screen-title{min-height:1px;}
#s-train .screen-header{padding:36px 28px 0;}
#s-train .t-step-lbl{display:none;}
#s-train .t-meta{align-items:flex-start;}
#s-train .t-progress-wrap{padding-top:4px !important;}

.back-btn{
  font-size:12px;color:#7A7268;background:none;
  border:.5px solid #E0DDD8;border-radius:20px;
  padding:5px 12px;cursor:pointer;font-family:'DM Sans',sans-serif;
}
.back-btn:hover{background:#EDEAE4;}

/* ── DIVIDER ── */
.divider{height:.5px;background:#E0DDD8;margin:0 28px;}

/* ── HOME ── */
.welcome-block{padding:28px 28px 0;}
.welcome-stroke{border-left:3px solid #E24B4A;padding-left:16px;}
.welcome-label{font-size:10px;font-weight:600;color:#7A7268;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px;}
.welcome-hz{font-family:'Noto Sans SC',sans-serif;font-size:38px;font-weight:700;color:#1a1a1a;line-height:1.2;margin-bottom:8px;}
.welcome-py{font-size:13px;color:#5F584F;font-weight:500;margin-bottom:4px;}
.welcome-en{font-size:11px;color:#6F675D;}
.welcome-tap{font-size:10px;color:#7A7268;letter-spacing:.04em;padding:8px 0 0 47px;display:block;}
.welcome-static{pointer-events:none;user-select:none;cursor:default;opacity:.95;}
.welcome-tap:hover{color:#5F584F;}

.stats-row{display:grid;grid-template-columns:repeat(3,1fr);padding:0 28px;margin:24px 0;}
.stat{text-align:center;}
.stat-n{font-size:26px;font-weight:600;color:#1a1a1a;}
.stat-l{font-size:10px;color:#6F675D;margin-top:2px;}
.stat.mid{border-left:.5px solid #E0DDD8;border-right:.5px solid #E0DDD8;}

.home-btns{padding:0 28px 40px;}
.train-btn{
  background:#E24B4A;border:none;border-radius:16px;
  padding:18px 22px;width:100%;
  display:flex;align-items:center;justify-content:space-between;
  cursor:pointer;margin-bottom:10px;
}
.train-btn:hover{background:#C93E3D;}
.train-btn:active{transform:scale(.99);}
.train-hz{font-family:'Noto Sans SC',sans-serif;font-size:18px;font-weight:700;color:#fff;margin-bottom:3px;}
.train-sub{font-size:11px;color:rgba(255,255,255,.82);}
.train-arrow{color:#fff;font-size:22px;opacity:.85;}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.grid-btn{
  background:#fff;border:.5px solid #E8E4DE;border-radius:14px;
  padding:14px 16px;cursor:pointer;text-align:left;
  font-family:'DM Sans',sans-serif;
}
.grid-btn:hover{background:#F7F5F0;}
.grid-btn:active{transform:scale(.98);}
.grid-hz{font-family:'Noto Sans SC',sans-serif;font-size:20px;font-weight:700;color:#1a1a1a;margin-bottom:3px;}
.grid-lbl{font-size:11px;color:#6C655C;}

/* ── LEARN ── */
.cat-scroll{display:flex;gap:7px;padding:16px 28px 0;overflow-x:auto;scrollbar-width:none;}
.cat-scroll::-webkit-scrollbar{display:none;}
.cat-pill{
  background:#fff;border:.5px solid #E8E4DE;border-radius:20px;
  padding:5px 13px;font-size:11px;font-weight:600;color:#5F584F;
  white-space:nowrap;cursor:pointer;font-family:'DM Sans',sans-serif;
  letter-spacing:.03em;flex-shrink:0;
}
.cat-pill.active{background:#1a1a1a;color:#fff;border-color:#1a1a1a;}

.word-nav{display:flex;gap:6px;padding:12px 28px 0;overflow-x:auto;scrollbar-width:none;flex-wrap:nowrap;}
.word-nav::-webkit-scrollbar{display:none;}
.word-pill{
  background:#fff;border:.5px solid #E8E4DE;border-radius:8px;
  padding:4px 10px;font-family:'Noto Sans SC',sans-serif;font-size:14px;
  cursor:pointer;white-space:nowrap;flex-shrink:0;color:#1a1a1a;
}
.word-pill.active{background:#1a1a1a;color:#fff;border-color:#1a1a1a;}

.word-hero{padding:24px 28px 16px;text-align:center;}
.word-emoji{font-size:52px;margin-bottom:10px;display:block;}
.word-big{font-family:'Noto Sans SC',sans-serif;font-size:58px;font-weight:700;color:#1a1a1a;line-height:1;}
.word-py{font-size:17px;color:#5F584F;margin-top:7px;letter-spacing:.04em;}
.word-meanings{display:flex;justify-content:center;gap:10px;margin-top:10px;flex-wrap:wrap;}
.word-pill2{background:#fff;border:.5px solid #E8E4DE;border-radius:20px;padding:4px 13px;font-size:12px;color:#1a1a1a;}

.sents{padding:0 28px;}
.sent-card{
  border:.5px solid #E8E4DE;border-radius:13px;
  padding:12px 14px;margin-bottom:8px;cursor:pointer;
  background:#fff;
}
.sent-card:hover{background:#F7F5F0;}
.sent-zh{font-family:'Noto Sans SC',sans-serif;font-size:17px;font-weight:500;color:#1a1a1a;}
.sent-py{font-size:11px;color:#676057;margin-top:3px;}
.sent-en{font-size:11px;color:#676057;margin-top:2px;display:none;}
.sent-card.revealed .sent-en{display:block;}
.sent-mbar{height:2px;background:#EDEAE4;border-radius:2px;margin-top:8px;overflow:hidden;}
.sent-mfill{height:100%;background:#1D9E75;border-radius:2px;}
.sent-mlbl{font-size:9px;color:#726A60;margin-top:3px;}

.learn-nav-row{display:flex;gap:8px;padding:16px 28px 32px;}
.nav-btn{flex:1;background:#fff;border:.5px solid #E8E4DE;border-radius:12px;padding:11px 8px;font-family:'DM Sans',sans-serif;font-size:12px;font-weight:600;color:#5F584F;cursor:pointer;letter-spacing:.03em;}
.nav-btn:hover{background:#EDEAE4;}
.nav-btn.cta{background:#E24B4A;color:#fff;border-color:#E24B4A;}
.nav-btn.cta:hover{background:#C93E3D;}

/* step label — big and readable, not tiny uppercase */
.t-step-lbl{
  font-size:13px;font-weight:700;color:#1a1a1a;
  letter-spacing:.02em;
}
.t-counter{font-size:11px;font-weight:600;color:#756D63;}
.t-word-ct{font-size:11px;font-weight:700;color:#E24B4A;}
.t-meta{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;padding-top:8px;}
.t-progbar{height:3px;background:#E8E4DE;border-radius:2px;overflow:hidden;margin-bottom:0;}
.t-phase-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:8px 0 14px;}
.t-phase-l{font-size:11px;color:#6F685F;}
.t-phase-r{font-size:11px;color:#8D867D;}
.t-hero-label{font-size:11px;font-weight:700;color:#E24B4A;letter-spacing:.16em;text-transform:uppercase;text-align:center;margin:18px 0 8px;}
.t-compact-hz{font-family:'Noto Sans SC',sans-serif;font-size:64px;font-weight:700;color:#1a1a1a;line-height:1;text-align:center;margin:0 0 12px;}
.t-question{font-size:13px;font-weight:700;color:#6F685F;letter-spacing:.05em;text-transform:uppercase;margin-bottom:10px;}
.t-q-main{font-size:16px;color:#4C4741;line-height:1.45;margin-bottom:10px;}
.t-q-main strong{color:#1a1a1a;}
.t-helper-line{font-size:12px;color:#7F786F;margin-bottom:14px;}

.t-progfill{height:100%;background:#E24B4A;border-radius:2px;transition:width .35s;}

/* word strip — always shows which word is active */
.t-word-strip{
  display:flex;gap:6px;padding:10px 0 0;overflow-x:auto;scrollbar-width:none;
}
.t-word-strip::-webkit-scrollbar{display:none;}
.t-word-pill{
  font-family:'Noto Sans SC',sans-serif;
  font-size:13px;font-weight:700;
  padding:4px 10px;border-radius:20px;
  border:.5px solid #E8E4DE;
  background:#fff;color:#7A7268;
  white-space:nowrap;flex-shrink:0;
  transition:all .2s;
}
.t-word-pill.active{
  background:#1a1a1a;color:#fff;border-color:#1a1a1a;
}
.t-word-pill.done{
  background:#E1F5EE;color:#085041;border-color:#9FE1CB;
}

.t-zone{padding:16px 28px 0;}
.t-card{background:#F7F5F0;border:.5px solid #E8E4DE;border-radius:16px;padding:18px 16px;margin-bottom:12px;}
.t-main-hz{font-family:'Noto Sans SC',sans-serif;font-size:64px;font-weight:700;color:#1a1a1a;line-height:1.05;margin-bottom:10px;text-align:center;}
.t-main-py{font-size:18px;color:#E24B4A;font-weight:600;text-align:center;margin-bottom:6px;}
.t-main-en{font-size:15px;color:#4C4741;text-align:center;font-weight:600;}
.t-sentence-card{background:#FFF8F5;border:.5px solid #F0DDD7;border-radius:14px;padding:14px 14px;margin-bottom:12px;}
.t-helper{font-size:11px;font-weight:600;color:#6F685F;margin-bottom:8px;letter-spacing:.03em;text-transform:none;}
.t-minor{font-size:11px;color:#7F786F;margin-top:6px;}

.word-tag{display:inline-flex;align-items:center;gap:6px;background:#FFF0EE;border:.5px solid #F5D0CC;border-radius:8px;padding:4px 10px;margin-bottom:6px;}
.word-tag-hz{font-family:'Noto Sans SC',sans-serif;font-size:15px;font-weight:700;color:#C93E3D;}
.word-tag-py{font-size:10px;color:#A76761;}
.rep-dots{display:flex;gap:5px;align-items:center;margin-bottom:10px;min-height:7px;}
.dot{width:7px;height:7px;border-radius:50%;background:#E8E4DE;display:block;flex:0 0 7px;}
.dot.done{background:#E24B4A;}
.dot.now{background:#F5B8B5;}
.mbar-wrap{height:2px;background:#EDEAE4;border-radius:2px;margin-bottom:4px;overflow:hidden;}
.mbar-fill{height:100%;background:#1D9E75;border-radius:2px;transition:width .4s;}
.mbar-lbl{font-size:9px;color:#8D867D;margin-bottom:12px;}

/* t-prompt: clear action label */
.t-prompt{font-size:11px;font-weight:600;color:#6F685F;letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px;}

.t-sent{font-family:'Noto Sans SC',sans-serif;font-size:30px;font-weight:700;color:#1a1a1a;line-height:1.25;margin-bottom:6px;}
.t-py{font-size:13px;color:#7F786F;margin-bottom:3px;}
.t-en{font-size:11px;color:#7F786F;margin-bottom:12px;}

/* input — always prominent */
.blank-in{
  width:100%;background:#F7F5F0;border:.5px solid #B8B1A7;border-radius:13px;
  padding:14px 16px;font-family:'Noto Sans SC',sans-serif;font-size:22px;
  color:#1a1a1a;outline:none;margin-bottom:6px;
  display:block;
}
.blank-in:focus{border-color:#5F584F;}

/* input guidance — always shown under input */
.input-hint{
  font-size:11px;color:#7F786F;margin-bottom:10px;padding:0 2px;
}
.input-hint strong{color:#5F584F;font-weight:600;}

.opts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:10px;}
.opt{
  background:#F7F5F0;border:.5px solid #D8D2CA;border-radius:13px;
  padding:14px 10px;font-family:'Noto Sans SC',sans-serif;font-size:18px;
  cursor:pointer;color:#1a1a1a;text-align:center;
}
.opt:hover{background:#F7F5F0;}
.opt.correct{background:#E1F5EE;border-color:#1D9E75;color:#085041;}
.opt.wrong{background:#FFF0EE;border-color:#E24B4A;color:#C93E3D;}

.speak-assist{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.speak-assist-btn{
  display:inline-flex;align-items:center;gap:6px;
  background:#fff;color:#5F584F;border:.5px solid #E0DDD8;border-radius:10px;
  padding:9px 14px;font-family:'DM Sans',sans-serif;font-size:11px;font-weight:600;
  letter-spacing:.04em;cursor:pointer;white-space:nowrap;flex-shrink:0;
}
.speak-assist-btn:hover{background:#F7F5F0;}
.speak-assist-btn.on{background:#FFF0EE;border-color:#F5D0CC;color:#C93E3D;}
.speak-assist-btn.no-support{opacity:.4;cursor:not-allowed;pointer-events:none;}
.speak-no-support-msg{font-size:11px;color:#6F675D;line-height:1.4;}
.heard{font-size:11px;color:#645D54;margin-top:4px;min-height:16px;font-style:italic;}

/* feedback */
.fb{border-radius:13px;padding:12px 14px;margin-bottom:10px;display:none;}
.fb.correct{background:#E1F5EE;}
.fb.close{background:#FFF8EE;}
.fb.wrong{background:#FFF0EE;}
.fb-lbl{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px;}
.fb.correct .fb-lbl{color:#085041;}
.fb.close .fb-lbl{color:#7A4F0A;}
.fb.wrong .fb-lbl{color:#C93E3D;}
.fb-row{display:flex;gap:8px;align-items:baseline;font-size:12px;margin-bottom:3px;}
.fb-row-lbl{width:60px;font-size:10px;color:#7F786F;flex-shrink:0;}
.fb-row-val{font-family:'Noto Sans SC',sans-serif;font-size:16px;font-weight:700;line-height:1.3;}
.fb.correct .fb-row-val{color:#085041;}
.fb.close .fb-row-val{color:#7A4F0A;}
.fb.wrong .fb-row-val{color:#1a1a1a;}
.diff-wrap{font-family:'Noto Sans SC',sans-serif;font-size:16px;font-weight:700;line-height:1.4;}
.diff-ok{color:#1a1a1a;}
.diff-bad{background:#E24B4A;color:#fff;border-radius:3px;padding:0 2px;}

/* sticky bottom — always visible, never hidden */
.t-sticky-bottom{
  position:sticky;bottom:0;
  background:#F7F5F0;
  padding:10px 28px 28px;
  border-top:.5px solid #E8E4DE;
}
/* NEXT BUTTON: always visible — only enabled/disabled, never display:none */
.next-btn{
  width:100%;background:#1a1a1a;border:none;border-radius:13px;
  padding:15px;font-family:'DM Sans',sans-serif;font-size:14px;font-weight:600;
  color:#fff;cursor:pointer;
  display:block !important;  /* always visible */
  transition:opacity .15s;
}
.next-btn:hover:not(:disabled){opacity:.85;}
.next-btn:active:not(:disabled){transform:scale(.99);}
.next-btn:disabled{
  opacity:.28;
  cursor:not-allowed;
  transform:none;
}
.skip-hint{font-size:11px;color:#7F786F;text-align:center;margin-top:8px;min-height:16px;}

/* ── DONE ── */
.done-wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 28px;}
.done-big{font-family:'Noto Sans SC',sans-serif;font-size:52px;font-weight:700;color:#1a1a1a;margin-bottom:8px;}
.done-msg-box{border-left:3px solid #E24B4A;padding-left:14px;margin:20px 0 28px;}
.done-phrase-hz{font-family:'Noto Sans SC',sans-serif;font-size:24px;font-weight:700;color:#1a1a1a;margin-bottom:4px;}
.done-phrase-py{font-size:12px;color:#5F584F;margin-bottom:2px;}
.done-phrase-en{font-size:10px;color:#6F675D;}
.done-stats{display:flex;gap:32px;margin-bottom:32px;}
.ds{text-align:center;}
.ds-n{font-size:28px;font-weight:600;color:#1a1a1a;}
.ds-l{font-size:10px;color:#7A7268;margin-top:2px;}
.done-weak{margin-bottom:24px;text-align:center;}
.weak-lbl{font-size:10px;font-weight:600;color:#6F675D;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px;}
.weak-pill{display:inline-block;margin:0 4px 5px;background:#FFF0EE;border:.5px solid #F5D0CC;border-radius:8px;padding:5px 12px;font-family:'Noto Sans SC',sans-serif;font-size:16px;font-weight:700;color:#C93E3D;}
.strong-msg{font-size:13px;color:#1D9E75;font-weight:600;}

/* ── REVIEW ── */
.rev-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;padding:16px 28px 32px;}
.rev-card{background:#fff;border:.5px solid #E8E4DE;border-radius:13px;padding:14px;cursor:pointer;}
.rev-card:hover{background:#F7F5F0;}
.rev-card.weak{border-color:#F5D0CC;}
.rev-hz{font-family:'Noto Sans SC',sans-serif;font-size:28px;font-weight:700;color:#1a1a1a;}
.rev-py{font-size:10px;color:#6F675D;margin-top:2px;}
.rev-en{font-size:11px;color:#1a1a1a;margin-top:3px;font-weight:500;}
.rev-bar{height:3px;background:#EDEAE4;border-radius:2px;margin-top:8px;overflow:hidden;}
.rev-fill{height:100%;border-radius:2px;}
.rev-meta{font-size:9px;color:#726A60;margin-top:3px;}

/* ── PROGRESS ── */
.prog-body{padding:20px 28px 40px;}
.prog-section{margin-bottom:24px;}
.prog-section-lbl{font-size:10px;font-weight:600;color:#6F675D;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px;}
.activity-bars{display:flex;gap:5px;align-items:flex-end;height:60px;}
.abar{flex:1;border-radius:4px 4px 0 0;background:#E8E4DE;min-height:4px;}
.abar.filled{background:#1a1a1a;}
.abar.today{background:#E24B4A;}
.abar-labels{display:flex;gap:5px;margin-top:5px;}
.abar-lbl{flex:1;text-align:center;font-size:9px;color:#726A60;}
.skill-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.skill-name{width:75px;font-size:11px;color:#645D54;}
.skill-track{flex:1;height:5px;background:#EDEAE4;border-radius:3px;overflow:hidden;}
.skill-bar{height:100%;border-radius:3px;}
.skill-pct{width:30px;text-align:right;font-size:10px;font-weight:600;color:#1a1a1a;}
.mastery-big{font-size:28px;font-weight:600;color:#1a1a1a;}
.mastery-sub{font-size:12px;color:#6F675D;}
.mastery-track{height:5px;background:#EDEAE4;border-radius:3px;overflow:hidden;margin-top:8px;}
.mastery-fill{height:100%;background:#1D9E75;border-radius:3px;}


/* ── TABLET / DESKTOP ALPHA PASS ── */