: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:#ff5fa2; /* 미니홈피 핑크 */
  --sky:#8fd3ff; --mint:#7be0c3; --lav:#c9b6ff; --lemon:#fff27a;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace; --cute:"Jua","IBM Plex Sans KR",sans-serif;
}
*{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:100vh;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}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.actions{display:flex;gap:8px}
.btn{height:36px;padding:0 14px;background:var(--panel);border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer}
.btn:hover{background:var(--hover)}
.btn--pink{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:700}
.btn--pink:hover{background:#ff4590}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 방 (Y2K 배경) ---------- */
.room{flex:1;width:100%;padding:28px max(28px,calc((100% - 1080px) / 2)) 56px;display:flex;flex-direction:column;gap:16px;
  background:
    radial-gradient(circle at 8% 14%,rgba(255,255,255,.9) 0 2px,transparent 3px),
    radial-gradient(circle at 92% 8%,rgba(255,255,255,.9) 0 2px,transparent 3px),
    radial-gradient(circle at 70% 40%,rgba(255,255,255,.7) 0 1.5px,transparent 2.5px),
    radial-gradient(circle at 20% 70%,rgba(255,255,255,.7) 0 1.5px,transparent 2.5px),
    linear-gradient(180deg,#e9f6ff 0%,#fbefff 55%,var(--bg) 100%)}

.modes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.mode{display:flex;align-items:center;gap:12px;padding:12px 14px;border:2px solid #fff;border-radius:18px;background:rgba(255,255,255,.65);cursor:pointer;text-align:left;box-shadow:0 2px 0 rgba(28,28,26,.08);transition:transform .15s,background .15s,border-color .15s;min-width:0}
.mode:hover{transform:translateY(-2px)}
.mode.is-active{background:#fff;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,95,162,.15),0 6px 0 rgba(255,95,162,.25)}
.mode-ic{flex:0 0 42px;height:42px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,var(--sky),var(--lav));font-family:var(--cute);font-size:20px;color:#fff;text-shadow:0 1px 0 rgba(0,0,0,.15)}
.mode.is-active .mode-ic{background:linear-gradient(135deg,#ff9cc8,var(--accent))}
.mode-txt{display:flex;flex-direction:column;gap:2px;min-width:0}
.mode-txt b{font-size:15.5px;font-weight:700;letter-spacing:-.01em}
.mode-txt small{font-size:11.5px;color:var(--sub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.opts{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 14px;border-radius:14px;background:rgba(255,255,255,.7);border:1px dashed #f3b6d2;min-height:52px}
.opts-label{font-size:12.5px;color:var(--ink-2);line-height:1.5;word-break:keep-all}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 12px;border-radius:999px;border:1.5px solid var(--line-2);background:#fff;font-size:13px;cursor:pointer}
.chip b{font-weight:700;font-size:14px}
.chip.is-on{border-color:var(--accent);background:#fff0f7;color:#c2185b}
.chip.is-on::before{content:"✓";font-size:11px}
.seg{display:flex;flex-wrap:wrap;background:#fff;border-radius:999px;padding:3px;gap:2px;border:1px solid var(--line)}
.seg-btn{height:30px;padding:0 12px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:12.5px;cursor:pointer;white-space:nowrap}
.seg-btn.is-active{background:var(--accent);color:#fff;font-weight:700}

/* 창 */
.panes{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:12px;align-items:stretch}
.win{display:flex;flex-direction:column;border-radius:16px;background:#fff;border:2px solid #cfe6ff;box-shadow:0 10px 30px -18px rgba(80,120,200,.45);overflow:hidden;min-width:0}
.win--out{border-color:#ffc4de;box-shadow:0 10px 30px -18px rgba(255,95,162,.5)}
.win-bar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:linear-gradient(90deg,#dff0ff,#f0e6ff);border-bottom:1px solid #e3ecf8}
.win--out .win-bar{background:linear-gradient(90deg,#ffe3f0,#fff4c9)}
.dots{display:flex;gap:5px}
.dots i{width:10px;height:10px;border-radius:50%;background:#ff8fb8}
.dots i:nth-child(2){background:#ffd36b}
.dots i:nth-child(3){background:#7be0a7}
.win-title{font-family:var(--cute);font-size:15px}
.win-count{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--muted);white-space:nowrap}
.win-text{display:block;width:100%;min-height:240px;flex:1;padding:16px;border:none;outline:none;resize:vertical;background:transparent;font-family:var(--font);font-size:17px;line-height:1.75;color:var(--ink);white-space:pre-wrap;word-break:break-all;overflow-wrap:anywhere}
.win-out{font-size:18px}
.win-out:empty::before{content:"변환 결과가 여기에 나와요 ✧";color:var(--muted);font-size:15px}
.win-out .chg{background:linear-gradient(transparent 55%,rgba(255,95,162,.3) 55%);color:#c2185b;font-weight:700}
.win-out .keep{color:var(--muted);text-decoration:underline dotted;text-underline-offset:4px}
.win-foot{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line-3)}
.swap{align-self:center;width:44px;height:44px;border-radius:50%;border:2px solid #fff;background:linear-gradient(135deg,var(--mint),var(--sky));color:#fff;font-size:20px;cursor:pointer;box-shadow:0 4px 12px rgba(80,150,200,.35);transform:rotate(90deg);transition:transform .25s}
.swap:hover{transform:rotate(270deg)}

/* 치트시트 */
.cheat{margin-top:8px;padding:20px;border-radius:18px;background:rgba(255,255,255,.8);border:1px solid var(--line)}
.cheat-head{display:flex;align-items:baseline;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.cheat-head h2{margin:0;font-family:var(--cute);font-size:20px;font-weight:400}
.cheat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.cheat-card{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 10px;border-radius:14px;background:#fff;border:1.5px solid #ffe0ee;cursor:pointer;transition:transform .15s}
.cheat-card:hover{transform:translateY(-2px);border-color:var(--accent)}
.cheat-pair{font-size:19px;font-weight:700;letter-spacing:-.01em;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:2px 8px}
.cheat-pair span{white-space:nowrap}
.cheat-pair i{font-style:normal;font-size:14px;color:var(--accent)}
.cheat-ex{font-size:12px;color:var(--sub);text-align:center}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);padding:10px 18px;border-radius:999px;background:var(--ink);color:#fff;font-size:13px;z-index:100;box-shadow:0 10px 30px rgba(0,0,0,.2);animation:toast .25s ease-out;max-width:calc(100% - 32px);text-align:center}
@keyframes toast{from{opacity:0;transform:translate(-50%,8px)}}

@media (max-width:860px){
  .modes{grid-template-columns:repeat(2,minmax(0,1fr))}
  .panes{grid-template-columns:minmax(0,1fr)}
  .swap{transform:none;justify-self:center}
  .swap:hover{transform:rotate(180deg)}
}
@media (max-width:640px){
  .room{padding:18px 16px 40px;gap:12px}
  .modes{gap:8px}
  .mode{padding:10px;gap:8px;border-radius:14px}
  .mode-ic{flex-basis:34px;height:34px;border-radius:11px;font-size:16px}
  .mode-txt b{font-size:14px}
  .mode-txt small{font-size:10.5px}
  .win-text{min-height:150px;font-size:16px;padding:14px}
  .cheat{padding:16px}
  .cheat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cheat-pair{font-size:17px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 밤의 미니홈피 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141320; --surface:#191826; --panel:#1f1d2d; --panel-soft:#252335;
    --ink:#eeebf5; --ink-hover:#ffffff; --ink-2:#cbc6d8; --sub:#a39fb2; --muted:#8e8a9d;
    --line:#2f2c40; --line-2:#3a374d; --line-3:#29273a; --hover:#2b2940; --soft:#27253a; --track:#35324a;
  }
  :root[data-theme="dark"] .btn--pink{background:#e8478c;border-color:#e8478c}
  :root[data-theme="dark"] .btn--pink:hover{background:#f0559a}
  :root[data-theme="dark"] .room{background:
    radial-gradient(circle at 8% 14%,rgba(255,255,255,.55) 0 2px,transparent 3px),
    radial-gradient(circle at 92% 8%,rgba(255,255,255,.55) 0 2px,transparent 3px),
    radial-gradient(circle at 70% 40%,rgba(255,255,255,.4) 0 1.5px,transparent 2.5px),
    radial-gradient(circle at 20% 70%,rgba(255,255,255,.4) 0 1.5px,transparent 2.5px),
    linear-gradient(180deg,#1a1d36 0%,#24183a 55%,var(--bg) 100%)}
  :root[data-theme="dark"] .mode{border-color:rgba(255,255,255,.08);background:rgba(31,29,45,.75);box-shadow:0 2px 0 rgba(0,0,0,.25)}
  :root[data-theme="dark"] .mode.is-active{background:var(--panel);border-color:var(--accent)}
  :root[data-theme="dark"] .opts{background:rgba(31,29,45,.75);border-color:rgba(255,95,162,.4)}
  :root[data-theme="dark"] .chip{background:var(--panel)}
  :root[data-theme="dark"] .chip.is-on{background:rgba(255,95,162,.16);color:#ff8fbf}
  :root[data-theme="dark"] .seg{background:var(--panel)}
  :root[data-theme="dark"] .seg-btn.is-active{background:#e8478c}
  :root[data-theme="dark"] .win{background:var(--panel);border-color:#2f4a6e;box-shadow:0 10px 30px -18px rgba(0,0,0,.7)}
  :root[data-theme="dark"] .win--out{border-color:#6e2f4f}
  :root[data-theme="dark"] .win-bar{background:linear-gradient(90deg,#1f2d47,#2b2445);border-bottom-color:var(--line)}
  :root[data-theme="dark"] .win--out .win-bar{background:linear-gradient(90deg,#45213a,#3d3424)}
  :root[data-theme="dark"] .win-out .chg{background:linear-gradient(transparent 55%,rgba(255,95,162,.35) 55%);color:#ff9cc8}
  :root[data-theme="dark"] .swap{border-color:var(--panel)}
  :root[data-theme="dark"] .cheat{background:rgba(31,29,45,.85)}
  :root[data-theme="dark"] .cheat-card{background:var(--panel-soft);border-color:#4a2a40}
  :root[data-theme="dark"] .cheat-card:hover{border-color:var(--accent)}
  :root[data-theme="dark"] .toast{color:var(--bg)}
}