:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#1c1c1a;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:calc(100vh - 48px);display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.home{font-size:13px;color:var(--ink-2);text-decoration:none}
.home:hover{color:var(--ink)}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer}
.btn:hover{background:var(--hover)}
.btn:disabled{opacity:.4;cursor:default}
.btn:disabled:hover{background:transparent}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.text-input{height:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:14px;color:var(--ink)}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 게임 공통 셸 ---------- */
.actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.btn--accent{background:var(--accent);color:#fff;border:none;font-weight:500}
.btn--accent:hover{background:var(--accent);filter:brightness(1.08)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.game{flex:1;display:flex;flex-wrap:wrap;align-items:stretch;min-height:0}
.stage{flex:999 1 420px;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:40px 28px}
.side{flex:1 1 300px;min-width:0;max-width:100%;border-left:1px solid var(--line);background:var(--panel);padding:28px 24px 40px;display:flex;flex-direction:column;gap:28px}
.group{display:flex;flex-direction:column;gap:12px}
.group + .group{border-top:1px solid var(--line-3);padding-top:24px}
.rules{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-2);line-height:1.6;counter-reset:rule}
.rules li{display:flex;gap:10px}
.rules li::before{counter-increment:rule;content:counter(rule,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:var(--accent);padding-top:3px;flex-shrink:0}
.keys{display:flex;flex-direction:column;gap:8px;font-size:12px;color:var(--ink-2)}
.keys div{display:flex;justify-content:space-between;align-items:center;gap:12px}
.kbd{display:inline-block;font-family:var(--mono);font-size:11px;line-height:1.4;padding:1px 6px;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:5px;background:var(--surface);color:var(--ink)}
.best-card{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:16px;border-radius:12px;background:var(--panel-soft)}
.best-val{font-family:var(--mono);font-size:28px;font-weight:500;letter-spacing:-.02em}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:30px;padding:0 10px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:12px;cursor:pointer;white-space:nowrap}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.link-btn{padding:0;background:none;border:none;font-size:12px;color:var(--muted);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
@media (max-width:640px){
  .stage{padding:24px 16px}
  .side{border-left:none;border-top:1px solid var(--line);padding:24px 16px 40px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}

/* ---------- 산성비 타자 (레트로 CRT) ---------- */
:root{--accent:#2ee86f;--crt:#07120c;--phos:#7dffa6;--phos-dim:#2f7a4a;--gold:#ffd23f;--ice:#6be4ff;--danger:#ff4d6d;--coding:"Nanum Gothic Coding",var(--mono)}
.stage{justify-content:flex-start}
.crt{width:min(100%,720px);padding:14px;border-radius:26px;background:#1b1d22;box-shadow:inset 0 2px 0 rgba(255,255,255,.06),0 2px 0 #0d0e11,0 34px 60px -30px rgba(0,0,0,.6);display:flex;flex-direction:column;gap:12px}
.screen{position:relative;height:clamp(340px,58vh,560px);border-radius:16px;overflow:hidden;background:radial-gradient(ellipse at 50% 40%,#0f2418 0%,var(--crt) 70%);font-family:var(--coding);color:var(--phos)}
.screen::before{content:"";position:absolute;inset:0;z-index:5;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(0,0,0,.22) 0 1px,transparent 1px 3px)}
.screen::after{content:"";position:absolute;inset:0;z-index:6;pointer-events:none;border-radius:16px;box-shadow:inset 0 0 80px rgba(0,0,0,.75),inset 0 0 0 1px rgba(125,255,166,.08)}
.app[data-state="running"] .screen{animation:flicker 6s infinite}
.screen.is-hurt{animation:hurt .35s !important}

.hud{position:absolute;left:0;right:0;top:0;z-index:3;display:flex;justify-content:space-between;align-items:center;gap:8px;padding:12px 16px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--phos-dim);border-bottom:1px dashed rgba(125,255,166,.16)}
.hud b{color:var(--phos);font-weight:700;margin-left:4px;text-shadow:0 0 8px rgba(125,255,166,.6);font-variant-numeric:tabular-nums}
.lives{display:flex;gap:4px}
.life{width:12px;height:12px;background:var(--phos);clip-path:polygon(50% 100%,0 40%,0 15%,20% 0,50% 18%,80% 0,100% 15%,100% 40%);box-shadow:0 0 6px var(--phos);transition:opacity .3s,transform .3s}
.life.is-lost{opacity:.15;transform:scale(.7)}

.field{position:absolute;left:0;right:0;top:40px;bottom:30px;z-index:2}
.word{position:absolute;left:0;top:0;transform:var(--t);padding:2px 6px;font-size:clamp(16px,2.6vw,20px);font-weight:700;white-space:nowrap;color:var(--phos);text-shadow:0 0 6px rgba(125,255,166,.75),0 0 18px rgba(46,232,111,.35);will-change:transform}
.word::before{content:"";position:absolute;left:50%;bottom:100%;width:1px;height:26px;background:linear-gradient(transparent,rgba(125,255,166,.45))}
.word.is-gold{color:var(--gold);text-shadow:0 0 8px rgba(255,210,63,.85)}
.word.is-gold::before{background:linear-gradient(transparent,rgba(255,210,63,.6))}
.word.is-ice{color:var(--ice);text-shadow:0 0 8px rgba(107,228,255,.85)}
.word.is-ice::before{background:linear-gradient(transparent,rgba(107,228,255,.6))}
.word.is-target{background:rgba(125,255,166,.12);border-radius:4px}
.word.is-hit{animation:hit .35s ease-out forwards}
.word.is-splash{color:var(--danger);text-shadow:0 0 10px var(--danger);animation:splash .45s ease-out forwards}
.screen.is-frozen .word{color:var(--ice);text-shadow:0 0 8px rgba(107,228,255,.8)}
.screen.is-frozen::before{background:repeating-linear-gradient(0deg,rgba(0,0,0,.22) 0 1px,transparent 1px 3px),linear-gradient(rgba(107,228,255,.08),rgba(107,228,255,.08))}
.float{position:absolute;z-index:3;font-family:var(--mono);font-size:13px;font-weight:700;color:var(--phos);pointer-events:none;animation:floatUp .8s ease-out forwards}
.float.is-gold{color:var(--gold)}

.ground{position:absolute;left:0;right:0;bottom:0;height:30px;z-index:3;background:linear-gradient(rgba(46,232,111,.0),rgba(46,232,111,.18));border-top:2px solid rgba(46,232,111,.55)}
.ground i{position:absolute;inset:6px 0 0;background:repeating-linear-gradient(90deg,rgba(46,232,111,.35) 0 6px,transparent 6px 14px);opacity:.6;animation:acid 1.6s linear infinite}

.banner{position:absolute;left:0;right:0;top:42%;z-index:4;text-align:center;font-family:var(--mono);font-size:28px;font-weight:800;letter-spacing:.2em;color:var(--phos);text-shadow:0 0 12px var(--phos);opacity:0;pointer-events:none}
.banner.is-on{animation:banner 1.3s ease-out}

.overlay{position:absolute;inset:0;z-index:4;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;text-align:center;background:rgba(4,10,7,.72)}
.app[data-state="running"] .overlay{display:none}
.ov-title{font-family:var(--mono);font-size:clamp(30px,8vw,52px);font-weight:800;letter-spacing:.12em;color:var(--phos);text-shadow:0 0 14px rgba(125,255,166,.8),0 0 40px rgba(46,232,111,.4)}
.app[data-state="ready"] .ov-title,.app[data-state="paused"] .ov-title{animation:blink 1.2s steps(2) infinite}
.app[data-state="over"] .ov-title{color:var(--danger);text-shadow:0 0 14px rgba(255,77,109,.8)}
.ov-sub{margin:0;max-width:340px;word-break:keep-all;font-size:14px;line-height:1.6;color:#b9f5cb}
.ov-btn{margin-top:6px;height:44px;padding:0 26px;border:1px solid var(--phos);border-radius:999px;background:transparent;color:var(--phos);font-family:var(--coding);font-size:15px;font-weight:700;cursor:pointer;box-shadow:0 0 14px rgba(125,255,166,.35),inset 0 0 14px rgba(125,255,166,.15)}
.ov-btn:hover{background:var(--phos);color:var(--crt)}
.ov-hint{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--phos-dim)}
.app[data-state="paused"] .field{filter:blur(6px);opacity:.4}

.prompt{display:flex;align-items:center;gap:10px;padding:6px 6px 6px 16px;border-radius:999px;background:#0b0d10;box-shadow:inset 0 0 0 1px #2a2d34}
.prompt:focus-within{box-shadow:inset 0 0 0 1px var(--accent),0 0 0 3px rgba(46,232,111,.2)}
.prompt-label{font-family:var(--mono);font-weight:800;color:var(--accent)}
.prompt-input{flex:1;min-width:0;height:40px;border:none;background:transparent;color:#eafff0;font-family:var(--coding);font-size:18px;font-weight:700;outline:none;caret-color:var(--accent)}
.prompt-input::placeholder{color:#4c5b52;font-weight:400;font-size:15px}
.prompt-input.is-miss{animation:miss .3s;color:var(--danger)}
.prompt-btn{height:40px;padding:0 18px;border:none;border-radius:999px;background:var(--accent);color:#04140a;font-weight:700;font-size:14px;cursor:pointer}
.prompt-btn:hover{filter:brightness(1.1)}

.best-label{font-size:13px;color:var(--ink-2)}
.best-card{align-items:center}
.side-note{margin:0;font-size:12px;color:var(--muted);line-height:1.6}
.side-note:empty{display:none}
.legend{display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-2)}
.legend div{display:flex;align-items:center;gap:10px}
.chip{display:inline-flex;align-items:center;justify-content:center;min-width:48px;height:26px;padding:0 10px;border-radius:999px;font-family:var(--coding);font-size:13px;font-weight:700;background:var(--crt)}
.chip--gold{color:var(--gold)}
.chip--ice{color:var(--ice)}

@keyframes hit{0%{transform:var(--t) scale(1);opacity:1}100%{transform:var(--t) scale(1.6);opacity:0;filter:blur(2px)}}
@keyframes splash{0%{transform:var(--t) scaleY(1);opacity:1}100%{transform:var(--t) translateY(10px) scaleX(1.8) scaleY(.2);opacity:0}}
@keyframes floatUp{from{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-30px)}}
@keyframes banner{0%{opacity:0;transform:scale(.8)}20%{opacity:1;transform:scale(1)}80%{opacity:1}100%{opacity:0}}
@keyframes blink{0%{opacity:1}100%{opacity:.35}}
@keyframes flicker{0%,96%,100%{opacity:1}97%{opacity:.93}98%{opacity:1}99%{opacity:.96}}
@keyframes hurt{0%,100%{transform:translate(0)}20%{transform:translate(-6px,2px);box-shadow:inset 0 0 0 3px var(--danger)}40%{transform:translate(5px,-2px)}60%{transform:translate(-3px,1px)}}
@keyframes miss{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
@keyframes acid{from{background-position:0 0}to{background-position:28px 0}}
@media (max-width:640px){
  .crt{padding:10px;border-radius:20px}
  .screen{height:clamp(300px,52vh,460px);border-radius:12px}
  .hud{padding:10px 12px;font-size:10px;letter-spacing:.08em}
  .prompt-btn{padding:0 14px}
  .prompt-input{font-size:16px}
}

/* 다크 모드 (인쇄는 라이트 그대로) — CRT 화면은 원래 어두워서 테두리만 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141318; --surface:#1a1920; --panel:#1f1e26; --panel-soft:#24232c;
    --ink:#ecebf0; --ink-hover:#ffffff; --ink-2:#c9c7d1; --sub:#a09eab; --muted:#8a8895;
    --line:#2e2d36; --line-2:#393843; --line-3:#26252d; --hover:#2a2932; --soft:#26252d; --track:#34333d;
    --accent-soft:rgba(46,232,111,.16);
  }
  :root[data-theme="dark"] .btn--solid,
  :root[data-theme="dark"] .btn--accent{color:var(--bg)}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--track);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .crt{box-shadow:inset 0 2px 0 rgba(255,255,255,.06),0 0 0 1px #2c2f36,0 2px 0 #0d0e11,0 34px 60px -30px rgba(0,0,0,.8)}
  :root[data-theme="dark"] .chip{box-shadow:inset 0 0 0 1px #1e3a29}
}