: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:#d97706; /* 앰버 */
  --accent-soft:#fdf0dc;
  --code-bg:#1b1a17; --code-ink:#e9e4d8; --code-line:#2e2c27;
  --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,input,select,textarea{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.mono{font-family:var(--mono)}
.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;flex-wrap:wrap}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.btn--tiny{height:28px;padding:0 11px;font-size:12px}
.btn--accent{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:500}
.btn--accent:hover{background:#b86304}
.text-input{height:36px;width:100%;padding:0 10px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font-size:13px;color:var(--ink)}
.text-input:focus{outline:none;border-color:var(--accent)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

.so{width:100%;max-width:1240px;margin:0 auto;padding:24px 28px 40px;display:flex;flex-direction:column;gap:16px}

/* ---------- 옵션 ---------- */
.opts{display:flex;flex-wrap:wrap;gap:6px}
.opt{display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 12px 0 10px;border:1px solid var(--line-2);border-radius:999px;background:var(--panel);font-size:12.5px;cursor:pointer;transition:background .15s,border-color .15s;user-select:none}
.opt:hover{border-color:var(--ink)}
.opt input[type=checkbox]{width:15px;height:15px;margin:0;accent-color:var(--accent)}
.opt small{color:var(--muted);font-size:11px;margin-left:2px}
.opt:has(input:checked){background:var(--accent-soft);border-color:#f1c98e}
.opt--warn:has(input:checked){background:#fff4e5;border-color:#f59e0b}
.opt select{height:24px;border:1px solid var(--line-2);border-radius:6px;background:#fff;font-family:var(--mono);font-size:12px;padding:0 2px}

/* ---------- 에디터 ---------- */
.editors{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.ed{display:flex;flex-direction:column;background:var(--code-bg);border-radius:16px;overflow:hidden;min-width:0}
.ed-head{display:flex;align-items:center;gap:8px;padding:10px 12px 10px 16px;border-bottom:1px solid var(--code-line)}
.ed-title{font-size:13px;font-weight:500;color:#f4efe2;margin-right:auto}
.ed-size{font-size:12px;color:#b4ab95}
.ed .btn{border-color:#45413a;color:#e9e4d8}
.ed .btn:hover{background:#2e2c27}
.ed .btn--accent{border-color:var(--accent);color:#fff}
.ed .btn--accent:hover{background:#b86304}
.ed--out .ed-size{color:#f8b44a}
.code{display:block;width:100%;height:300px;margin:0;padding:14px 16px;border:none;resize:vertical;background:transparent;color:var(--code-ink);font-family:var(--mono);font-variant-ligatures:none;font-size:12px;line-height:1.65;white-space:pre-wrap;word-break:break-all;overflow:auto}
.code:focus{outline:none;box-shadow:inset 0 0 0 2px rgba(217,119,6,.5)}
.code::placeholder{color:#7d776a}

/* ---------- 통계 ---------- */
.stats{display:grid;grid-template-columns:auto 180px minmax(0,1fr);align-items:center;gap:22px;padding:18px 22px;background:var(--panel);border:1px solid var(--line);border-radius:16px}
.saved{display:flex;flex-direction:column;gap:2px}
.saved b{font-family:var(--mono);font-size:44px;font-weight:700;letter-spacing:-.04em;line-height:1;color:var(--accent);transition:color .2s}
.saved b.is-zero{color:var(--muted)}
.meter{display:flex;flex-direction:column;gap:6px}
.meter i{display:block;height:10px;border-radius:999px;background:var(--ink-2);width:100%;transition:width .5s cubic-bezier(.2,.8,.2,1)}
.meter i + i{background:var(--accent)}
.stat-text{display:flex;flex-direction:column;gap:4px;min-width:0}
.stat-text p{margin:0}
.bytes{font-size:15px;font-weight:500}
.log{font-size:12.5px;color:var(--sub);line-height:1.6}
.diff{font-size:12.5px;line-height:1.5}
.diff.is-ok{color:#15803d}
.diff.is-warn{color:#b45309}
.diff.is-err{color:#b91c1c}

/* ---------- 미리보기 ---------- */
.previews,.css-sec{display:flex;flex-direction:column;gap:12px;padding:18px;background:var(--panel);border:1px solid var(--line);border-radius:16px}
.pv-head,.css-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.sec-title{margin:0;font-size:15px;font-weight:700}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{height:30px;padding:0 12px;border:none;background:transparent;border-radius:999px;font-size:12.5px;color:var(--sub);cursor:pointer;white-space:nowrap}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12);font-weight:500}
.pv-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.pv{margin:0;display:flex;flex-direction:column;gap:6px}
.pv-box{height:220px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line);padding:20px;overflow:hidden}
.pv-box img{width:100%;height:100%;object-fit:contain}
.pv-box img:not([src]){visibility:hidden}
.pv figcaption{font-size:12px;color:var(--sub);text-align:center}
.pv-grid[data-bg=checker] .pv-box{background-color:#fff;background-image:linear-gradient(45deg,#efeee9 25%,transparent 25%),linear-gradient(-45deg,#efeee9 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#efeee9 75%),linear-gradient(-45deg,transparent 75%,#efeee9 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0}
.pv-grid[data-bg=light] .pv-box{background:#fff}
.pv-grid[data-bg=dark] .pv-box{background:#1c1c1a;border-color:#1c1c1a}

/* ---------- CSS ---------- */
.css-body{display:grid;grid-template-columns:300px minmax(0,1fr);gap:16px}
.css-ctrl{display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--ink-2)}
.field .seg-btn{flex:1}
.color-row{display:flex;align-items:center;gap:10px}
input[type=color]{width:36px;height:36px;padding:0;border:1px solid var(--line-2);border-radius:9px;background:none;cursor:pointer}
input[type=color]::-webkit-color-swatch-wrapper{padding:3px}
input[type=color]::-webkit-color-swatch{border:none;border-radius:6px}
.check{display:flex;align-items:center;gap:6px;font-size:12.5px;cursor:pointer}
.check input{accent-color:var(--accent)}
.css-demo{position:relative;display:flex;align-items:center;justify-content:center;gap:24px;min-height:120px;padding:18px 18px 30px;border-radius:12px;background:var(--panel-soft);border:1px dashed var(--line-2);color:var(--accent)}
.demo-el{display:inline-block;flex:0 0 auto}
.demo-cap{position:absolute;bottom:8px;left:0;right:0;text-align:center;font-size:11px;color:var(--muted)}
.css-code{display:flex;flex-direction:column;background:var(--code-bg);border-radius:14px;overflow:hidden;min-width:0}
.css-code-head{display:flex;justify-content:space-between;align-items:center;padding:8px 10px 8px 16px;border-bottom:1px solid var(--code-line)}
.css-code-head .mono-label{color:#b4ab95}
.code--pre{height:auto;min-height:220px;max-height:340px;resize:none}
.code--pre .p{color:#f8b44a}
.code--pre .s{color:#9ad1a5}
.note{margin:0;font-size:12px;line-height:1.6;color:var(--muted)}
.privacy{margin:0;font-size:12.5px;color:var(--sub);display:flex;align-items:center;gap:8px}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);flex:0 0 auto}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:100;max-width:calc(100vw - 32px);text-align:center}
.toast.is-show{opacity:1;transform:translate(-50%,0)}
.is-drop .ed:first-child{box-shadow:0 0 0 3px var(--accent)}

@media (max-width:900px){
  .editors,.css-body{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:auto minmax(0,1fr)}
  .meter{display:none}
}
@media (max-width:640px){
  .so{padding:16px 16px 32px}
  .actions{width:100%}
  .actions .btn{flex:1}
  .code{height:220px}
  .stats{grid-template-columns:minmax(0,1fr);gap:10px;padding:16px}
  .saved{flex-direction:row;align-items:baseline;gap:10px}
  .saved b{font-size:36px}
  .pv-grid{gap:8px}
  .pv-box{height:150px;padding:12px}
  .previews,.css-sec{padding:14px}
  .opt{height:32px;font-size:12px}
  .opt small{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* 다크 모드 (인쇄는 라이트 그대로). 미리보기 배경(체커/밝게/어둡게)은 사용자가 고른 그대로 둠 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141311; --surface:#191816; --panel:#1e1d1a; --panel-soft:#23221f;
    --ink:#ecebe6; --ink-hover:#ffffff; --ink-2:#c9c6be; --sub:#a29f96; --muted:#8c8980;
    --line:#2f2d29; --line-2:#3a3833; --line-3:#272622; --hover:#2a2925; --soft:#272622; --track:#35332e;
    --accent:#f5a524; --accent-soft:rgba(245,165,36,.14);
    --code-bg:#11100e;
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast{color:var(--bg)}
  :root[data-theme="dark"] .btn--solid{background:var(--accent)}
  :root[data-theme="dark"] .btn--solid:hover{background:#f8bb55}
  :root[data-theme="dark"] .btn--accent,:root[data-theme="dark"] .ed .btn--accent{color:var(--bg)}
  :root[data-theme="dark"] .btn--accent:hover,:root[data-theme="dark"] .ed .btn--accent:hover{background:#f8bb55}
  :root[data-theme="dark"] .opt:has(input:checked){border-color:rgba(245,165,36,.45)}
  :root[data-theme="dark"] .opt--warn:has(input:checked){background:rgba(245,158,11,.16);border-color:#f59e0b}
  :root[data-theme="dark"] .opt select{background:var(--surface);color:var(--ink)}
  :root[data-theme="dark"] .ed,:root[data-theme="dark"] .css-code{border:1px solid var(--line-2)}
  :root[data-theme="dark"] .code:focus{box-shadow:inset 0 0 0 2px rgba(245,165,36,.5)}
  :root[data-theme="dark"] .diff.is-ok{color:#4ade80}
  :root[data-theme="dark"] .diff.is-warn{color:#fbbf24}
  :root[data-theme="dark"] .diff.is-err{color:#f87171}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .pv-grid[data-bg=dark] .pv-box{border-color:var(--line-2)}
}