: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:#2741c9; /* 만년필 잉크 블루 */
  --accent-soft:#e7ebfb;
  --paper:#fffdf7;
  --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{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: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)}
.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}
input[type=range]{accent-color:var(--accent)}
@media (max-width:640px){ .topbar{padding:14px 16px} }

.mode{display:flex;padding:3px;background:var(--soft);border:1px solid var(--line);border-radius:999px;gap:2px}
.mode-btn{height:32px;padding:0 14px;border:none;background:transparent;border-radius:999px;font-size:13px;color:var(--sub);cursor:pointer;white-space:nowrap}
.mode-btn.is-active{background:var(--accent);color:#fff}

/* ---------- 레이아웃 ---------- */
.sg{width:100%;max-width:920px;margin:0 auto;padding:28px;display:flex;flex-direction:column;gap:20px}
.view{display:flex;flex-direction:column;gap:14px;animation:rise .25s ease}

/* 종이 */
.paper{position:relative;height:300px;border-radius:18px;background:var(--paper);border:1px solid #ebe5d6;
  box-shadow:0 1px 0 #fff inset,0 24px 50px -30px rgba(60,50,20,.35);overflow:hidden;
  background-image:radial-gradient(rgba(120,100,60,.05) 1px,transparent 1.2px);background-size:6px 6px}
#pad{position:absolute;inset:0;width:100%;height:100%;touch-action:none;cursor:crosshair;z-index:2}
.sign-line{position:absolute;left:40px;right:40px;bottom:70px;border-bottom:1.5px solid #cfc7b4;display:flex;justify-content:space-between;align-items:flex-end;padding-bottom:6px;pointer-events:none}
.sign-line .x{font-size:26px;line-height:1;color:#b9b09a;font-weight:300}
.sign-line .mono-label{position:absolute;right:0;top:12px;transform:translateY(100%);color:#b9b09a}
.placeholder{position:absolute;inset:0;margin:0;display:grid;place-items:center;font-size:15px;color:#bdb5a2;pointer-events:none;transition:opacity .3s}
.paper.has-ink .placeholder{opacity:0}

.toolbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:12px 14px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.inks{display:flex;gap:8px;align-items:center}
.ink{position:relative;width:30px;height:30px;border-radius:50%;border:none;background:var(--c);cursor:pointer;padding:0;box-shadow:0 0 0 2px #fff,0 0 0 3px var(--line-2);transition:transform .12s}
.ink:hover{transform:scale(1.08)}
.ink.is-active{box-shadow:0 0 0 2px #fff,0 0 0 4px var(--c, var(--ink))}
.ink--custom{background:conic-gradient(#f43f5e,#f59e0b,#22c55e,#0ea5e9,#8b5cf6,#f43f5e);overflow:hidden;display:block}
.ink--custom input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;border:none;padding:0}
.width-ctl{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);flex:1 1 200px;min-width:0}
.width-ctl input[type=range]{flex:1;min-width:60px}
.width-ctl .tb-num{flex:0 0 auto;width:3.8em;color:var(--ink)}
.ctl-presets{margin-top:0}
.tool-btns{display:flex;gap:6px;margin-left:auto}
.check{display:flex;align-items:center;gap:8px;font-size:13px;cursor:pointer;white-space:nowrap}
.check input{width:16px;height:16px;accent-color:var(--accent)}

/* 이름 */
.name-input{width:100%;height:60px;padding:0 20px;border:1px solid var(--line-2);border-radius:14px;background:var(--panel);font-size:22px;font-weight:500;letter-spacing:-.01em}
.name-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.fonts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.font-card{position:relative;display:flex;flex-direction:column;align-items:stretch;gap:6px;padding:14px 14px 10px;min-height:118px;border:1px solid var(--line);border-radius:14px;background:var(--paper);cursor:pointer;text-align:left;transition:border-color .15s,transform .15s,box-shadow .15s;overflow:hidden}
.font-card:hover{border-color:var(--ink);transform:translateY(-2px)}
.font-card.is-active{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.font-sample{flex:1;display:flex;align-items:center;justify-content:center;font-size:40px;line-height:1.1;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.font-meta{display:flex;justify-content:space-between;gap:6px;font-size:11.5px;color:var(--muted)}
.font-meta b{font-weight:500;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.font-card.is-latin .font-meta span{color:#b45309}
.font-card.is-dim .font-sample{opacity:.35}

/* 저장 */
.export{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:16px;padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:18px}
.export-preview{position:relative;display:grid;place-items:center;min-height:190px;border-radius:12px;padding:20px;overflow:hidden}
.export-preview canvas{max-width:100%;max-height:220px;display:block}
.export-tag{position:absolute;left:10px;bottom:8px;background:rgba(255,255,255,.85);padding:2px 6px;border-radius:6px}
.checker{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}
.export-side{display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field-label{font-size:12.5px;color:var(--ink-2)}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:30px;border:none;background:transparent;border-radius:999px;font-family:var(--mono);font-size:12.5px;color:var(--sub);cursor:pointer}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.out-size{margin:0;font-size:12px;color:var(--sub)}
.export-btns{display:grid;grid-template-columns:1fr;gap:8px}
.export-btns .btn{height:42px;font-size:14px}
.btn--accent{background:var(--accent)}
.btn--accent:hover{background:#1e33a6}
.note{margin:0;font-size:12px;line-height:1.6;color:var(--muted)}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:6px;vertical-align:1px}

.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)}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

@media (max-width:760px){
  .export{grid-template-columns:minmax(0,1fr)}
  .fonts{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .sg{padding:16px;gap:16px}
  .actions,.mode{width:100%}
  .mode-btn{flex:1;padding:0 8px}
  .paper{height:240px}
  .sign-line{left:20px;right:20px;bottom:56px}
  .toolbar{gap:12px}
  .tool-btns{margin-left:0;width:100%}
  .tool-btns .btn{flex:1}
  .font-sample{font-size:32px}
  .font-card{min-height:100px;padding:12px 10px 8px}
  .name-input{font-size:19px;height:54px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* 직접 입력칸: 단위(px·%·°)는 흐리게, 숫자는 본문색 */
.tb-num-wrap .tb-num{color:var(--ink)}

/* 다크 모드 (인쇄는 라이트 그대로). 서명 종이·저장 미리보기·내보내는 PNG는 실제 결과 그대로 밝게 둠 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#131418; --surface:#18191e; --panel:#1d1e24; --panel-soft:#222329;
    --ink:#eaebf0; --ink-hover:#ffffff; --ink-2:#c7c8d1; --sub:#9fa0ab; --muted:#898a95;
    --line:#2c2d35; --line-2:#373841; --line-3:#24252c; --hover:#282930; --soft:#24252c; --track:#32333c;
    --accent:#7d93ff; --accent-soft:rgba(125,147,255,.16);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast,:root[data-theme="dark"] .mode-btn.is-active,:root[data-theme="dark"] .tb-presets button[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .btn--solid{background:var(--accent)}
  :root[data-theme="dark"] .btn--solid:hover,:root[data-theme="dark"] .btn--accent:hover{background:#9eafff}
  :root[data-theme="dark"] .paper{border-color:#3a3730;box-shadow:0 24px 50px -30px rgba(0,0,0,.7)}
  :root[data-theme="dark"] .ink{box-shadow:0 0 0 2px var(--panel),0 0 0 3px var(--line-2)}
  :root[data-theme="dark"] .ink.is-active{box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--ink)}
  :root[data-theme="dark"] .font-card{background:var(--panel)}
  :root[data-theme="dark"] .font-card.is-latin .font-meta span{color:#fbbf24}
  :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"] .export-tag{color:#55534d}
}