:root{
  --bg:#0f1113;
  --surface:#16191c;
  --surface-2:#1b1f23;
  --line:#262b30;
  --line-strong:#333a40;
  --text:#e8e3da;
  --muted:#8b939b;
  --faint:#5b6269;
  --accent:#e16a70;
  --accent-soft:#3a2428;
  --up:#e16a70;
  --down:#64b89a;
  --gold:#d9b36a;
  --radius:8px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
button{font-family:inherit}

.screen{min-height:100vh;display:flex;flex-direction:column}
.hidden{display:none!important}

/* 按钮 */
.btn{
  border:1px solid var(--line-strong);
  background:var(--surface);
  color:var(--text);
  border-radius:var(--radius);
  padding:10px 18px;
  font-size:14px;
  cursor:pointer;
  transition:border-color .12s ease,background .12s ease,color .12s ease;
}
.btn:hover:not(:disabled){border-color:#4a535b}
.btn:disabled{opacity:.38;cursor:not-allowed}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#1a1112;font-weight:600}
.btn.primary:hover:not(:disabled){background:#ee7b80;border-color:#ee7b80}
.btn.ghost{background:transparent}
.btn.big{font-size:16px;padding:14px 34px}
.btn.small{font-size:12px;padding:6px 12px}

/* 首页 */
#home{align-items:center;justify-content:center;text-align:center;padding:40px 20px}
.home-wrap{max-width:520px;width:100%}
.logo-mark{
  font-size:52px;line-height:1;color:var(--accent);margin-bottom:18px;
  font-family:var(--mono);
}
.game-title{font-size:42px;font-weight:700;letter-spacing:1px;margin:0 0 10px}
.tagline{color:var(--muted);font-size:16px;margin:0 0 34px}
.home-actions{display:flex;gap:12px;justify-content:center;align-items:flex-end;margin-bottom:22px}
.date-field{display:flex;flex-direction:column;align-items:flex-start;gap:6px;color:var(--muted);font-size:12px}
.date-field input{
  background:var(--surface);border:1px solid var(--line-strong);color:var(--text);
  border-radius:var(--radius);padding:9px 12px;font-size:14px;font-family:var(--mono);
}
.hint{color:var(--faint);font-size:12px;margin-top:30px;max-width:420px;margin-left:auto;margin-right:auto}

/* 游戏页 */
#playing{padding:22px 24px 34px;max-width:1280px;margin:0 auto;width:100%}
.game-top{display:flex;align-items:center;gap:22px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.game-top .progress{flex:1;display:flex;flex-direction:column;gap:7px}
.progress-text{color:var(--muted);font-size:13px}
.progress-text b{color:var(--text);font-weight:600}
.progress-track{height:4px;background:var(--surface-2);border-radius:2px;overflow:hidden}
#progress-fill{height:100%;background:var(--accent);width:0;transition:width .2s ease}
.date-chip{color:var(--muted);font-size:13px;white-space:nowrap}
.date-chip b{color:var(--text)}
.question-title{font-size:24px;font-weight:600;margin:24px 0 18px;text-align:center}
.question-title.revealed{color:var(--muted);font-size:18px}

/* 四图面板 */
.board{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.loading{grid-column:1/-1;text-align:center;color:var(--faint);padding:80px 0;font-size:14px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:12px;cursor:pointer;transition:border-color .12s ease,transform .12s ease;
  display:flex;flex-direction:column;gap:8px;
}
.card:hover{border-color:var(--line-strong)}
.card.selected{border-color:var(--accent);background:var(--accent-soft)}
.card.correct{border-color:var(--accent)}
.card.wrong-pick{border-color:var(--line-strong)}
.card-head{display:flex;justify-content:space-between;align-items:baseline;gap:6px}
.card-name{font-weight:600;font-size:14px}
.card-code{color:var(--muted);font-size:11px;font-family:var(--mono)}
.card-letter{
  font-size:11px;font-weight:700;color:var(--faint);border:1px solid var(--line-strong);
  border-radius:4px;padding:1px 7px;font-family:var(--mono);flex-shrink:0;
}
.chart{height:230px;width:100%}
.tooltip{font:11px var(--mono);color:var(--muted);min-height:16px;text-align:left}
.card-badge{display:none;font-size:12px;font-weight:600;text-align:center;padding:6px;border-radius:6px}
.card-badge.show{display:block}
.card-badge.limit{background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent)}
.card-badge.picked{background:var(--surface-2);color:var(--muted);border:1px solid var(--line-strong)}
.card-badge.change-up{color:var(--up)}
.card-badge.change-down{color:var(--down)}
.card-badge.change-flat{color:var(--muted)}
.card .pick-hint{font-size:11px;color:var(--faint);text-align:center;min-height:14px}

/* 动作区 */
.action-row{display:flex;justify-content:center;margin-top:24px}
#action-row{flex-direction:column;align-items:center;gap:14px}
.action-row.spread{justify-content:center;gap:12px}
.action-row .btn{min-width:150px}

/* 反馈条 */
.feedback{
  margin:0 auto;max-width:640px;text-align:center;padding:14px 18px;
  border-radius:var(--radius);font-size:15px;
}
.feedback.ok{background:var(--surface-2);border:1px solid var(--gold);color:var(--gold)}
.feedback.miss{background:var(--surface-2);border:1px solid var(--line-strong);color:var(--muted)}
.feedback b{font-weight:600}

/* 结算 */
#settlement{justify-content:center;padding:50px 20px}
.settle-wrap{max-width:760px;width:100%;margin:0 auto}
.settle-wrap .game-title{text-align:center}
.settle-date{text-align:center;color:var(--muted);font-size:14px;margin:-2px 0 26px}
.score-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:30px}
.score-box{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;display:flex;flex-direction:column;gap:6px;align-items:center;text-align:center;
}
.score-box.wide{grid-column:1/-1}
.score-label{color:var(--muted);font-size:12px}
.score-value{font-size:30px;font-weight:700;font-family:var(--mono)}
.score-value.up{color:var(--up)}
.score-value.down{color:var(--down)}
.score-note{color:var(--faint);font-size:11px}

/* 逐题复盘 */
.review{display:flex;flex-direction:column;gap:8px;margin-bottom:28px}
.review-row{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:11px 14px;display:flex;align-items:center;gap:12px;font-size:13px;
}
.review-row .qno{color:var(--faint);font-family:var(--mono);width:52px;flex-shrink:0}
.review-row .mark{font-weight:700;width:20px}
.review-row .mark.ok{color:var(--gold)}
.review-row .mark.miss{color:var(--faint)}
.review-row .body{flex:1;min-width:0}
.review-row .line{color:var(--text)}
.review-row .line small{color:var(--muted)}
.review-row .delta{font-family:var(--mono);text-align:right;white-space:nowrap}

/* Toast */
#toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);
  background:var(--surface-2);border:1px solid var(--line-strong);color:var(--text);
  padding:10px 18px;border-radius:var(--radius);font-size:13px;display:none;z-index:50;
}

@media(max-width:960px){
  .board{grid-template-columns:repeat(2,minmax(0,1fr))}
  .game-top{flex-wrap:wrap;gap:12px}
  .date-chip{order:3;width:100%}
}
@media(max-width:520px){
  .board{grid-template-columns:1fr}
  .home-actions{flex-direction:column;align-items:stretch}
  .date-field{align-items:center}
  .action-row.spread{flex-wrap:wrap}
}

/* Publishing shell: retain the original game's charts, palette and screens. */
html{color-scheme:dark;scroll-padding-top:70px}
body{padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
.screen{min-height:calc(100svh - 110px)}
.game-nav{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:calc(10px + env(safe-area-inset-top)) 20px 10px;border-bottom:1px solid var(--line);font-size:12px}
.game-nav>div{display:flex;gap:12px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.game-nav a,.game-footer a{color:var(--muted);text-decoration:none}
.game-nav>a{white-space:nowrap}
.game-nav button,.import-label{font:inherit;color:var(--muted);background:none;border:0;padding:8px 0;cursor:pointer;min-height:44px;display:inline-flex;align-items:center}
.game-nav button:hover,.game-nav a:hover,.import-label:hover{color:var(--text)}
.game-footer{padding:20px 16px calc(20px + env(safe-area-inset-bottom));text-align:center;font-size:11px;color:var(--faint)}
.btn{min-height:44px;touch-action:manipulation}
.card{min-width:0}.card:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.tooltip{overflow-wrap:anywhere}.date-field input{min-height:44px;max-width:100%}
#toast{max-width:calc(100% - 28px);width:max-content;bottom:calc(20px + env(safe-area-inset-bottom))}
dialog{max-width:calc(100vw - 36px);width:400px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface);color:var(--text);padding:24px;line-height:1.8}
dialog::backdrop{background:#000a}
@media(max-width:520px){
  #playing{padding:18px 14px calc(24px + env(safe-area-inset-bottom))}
  .game-nav{padding-left:14px;padding-right:14px}.game-nav>div{gap:10px}
  .game-title{font-size:34px}.game-top{gap:10px}.chart{height:240px}
  .game-top .progress{min-width:130px}.review-row{padding:10px;gap:6px;font-size:12px}
  .review-row .qno{width:44px}.review-row .delta{font-size:11px}
  #settlement{padding:30px 14px}.score-box{padding:16px}.score-value{font-size:27px}
  #action-row{position:sticky;bottom:0;background:var(--bg);padding:12px 0 calc(12px + env(safe-area-inset-bottom));margin-top:12px;z-index:2}
  .action-row.spread .btn{min-width:135px;flex:1}.game-footer{overflow-wrap:anywhere}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}