: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:#e0a800; /* 포스트잇 옐로 */
  --cork:#e9dcc4;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace; --pen:"Nanum Pen Script","IBM Plex Sans KR",cursive;
}
*{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;word-break:keep-all}
button,textarea{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;align-items:center}
.saved{font-size:12px;color:var(--muted);font-family:var(--mono)}
.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;background:#fff}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

.wrap{width:100%;max-width:1280px;margin:0 auto;padding:20px 28px 48px;display:flex;flex-direction:column;gap:14px}

/* ---------- 툴바 ---------- */
.toolbar{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:12px 14px;background:var(--panel);border:1px solid var(--line);border-radius:18px;position:sticky;top:8px;z-index:500}
.tb-group{display:flex;align-items:center;gap:10px}
.tb-group--end{margin-left:auto;gap:8px}
.tb-label{font-size:12px;color:var(--sub);white-space:nowrap}
.swatches{display:flex;gap:6px}
.swatch{width:26px;height:26px;border-radius:7px;border:1px solid rgba(0,0,0,.08);background:var(--c);cursor:pointer;transform:rotate(-4deg);transition:transform .15s,box-shadow .15s}
.swatch:hover{transform:rotate(0) scale(1.08)}
.swatch[aria-checked="true"]{box-shadow:0 0 0 2px #fff,0 0 0 4px var(--ink);transform:rotate(0)}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px}
.seg button{height:30px;padding:0 12px;border:none;border-radius:999px;background:transparent;font-size:12.5px;cursor:pointer;color:var(--ink-2)}
.seg button.is-active{background:#fff;color:var(--ink);font-weight:700;box-shadow:0 1px 3px rgba(0,0,0,.1)}

/* ---------- 보드 ---------- */
.board{position:relative;isolation:isolate;width:100%;min-height:480px;border-radius:22px;overflow:hidden;
  background-color:var(--cork);
  background-image:radial-gradient(rgba(120,90,50,.18) 1px,transparent 1.4px),radial-gradient(rgba(255,255,255,.35) 1px,transparent 1.4px);
  background-size:14px 14px,22px 22px;background-position:0 0,7px 9px;
  box-shadow:inset 0 0 0 10px #c9a97a,inset 0 0 0 11px rgba(0,0,0,.08),inset 0 8px 30px rgba(0,0,0,.08)}
.board-empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;margin:0;padding:24px;text-align:center;font-family:var(--pen);font-size:28px;color:rgba(80,60,30,.55);pointer-events:none}
.board.is-tidy .sticky{transition:left .4s cubic-bezier(.2,.8,.2,1),top .4s cubic-bezier(.2,.8,.2,1),transform .4s}

.sticky{position:absolute;display:flex;flex-direction:column;background:var(--note,#ffe873);border-radius:3px 3px 4px 18px;
  transform:rotate(var(--rot,0deg));box-shadow:0 1px 1px rgba(0,0,0,.08),0 10px 18px -6px rgba(60,40,10,.35);
  transition:box-shadow .15s,transform .15s,width .2s,height .2s}
.sticky::after{content:"";position:absolute;right:0;bottom:0;width:22px;height:22px;background:linear-gradient(135deg,rgba(0,0,0,.08) 50%,transparent 50%);border-radius:0 0 4px 0;pointer-events:none;opacity:.6}
.sticky:focus-within{box-shadow:0 1px 1px rgba(0,0,0,.08),0 16px 28px -8px rgba(60,40,10,.45)}
.sticky.is-drag{transform:rotate(0) scale(1.04);box-shadow:0 24px 40px -10px rgba(60,40,10,.5);transition:none;cursor:grabbing}
.sticky.is-new{animation:stick .4s cubic-bezier(.3,1.5,.5,1)}
@keyframes stick{from{transform:rotate(var(--rot,0deg)) scale(.6) translateY(-20px);opacity:0}}
.sticky-head{display:flex;align-items:center;justify-content:space-between;height:34px;padding:0 4px;background:rgba(0,0,0,.05);border-radius:3px 3px 0 0;flex:none}
.grip{flex:1;height:100%;border:none;background:transparent;cursor:grab;text-align:left;padding:0 6px;color:rgba(0,0,0,.35);font-size:16px;touch-action:none;-webkit-user-select:none;user-select:none}
.grip:active{cursor:grabbing}
.sticky-tools{display:flex;gap:1px;flex:none}
.tool{width:28px;height:28px;border:none;background:transparent;border-radius:6px;cursor:pointer;font-size:13px;color:rgba(0,0,0,.5)}
.tool:hover{background:rgba(255,255,255,.55);color:var(--ink)}
.tool[data-act="color"]{font-size:16px;text-shadow:0 0 1px rgba(0,0,0,.4)}
.tool--del:hover{color:#c0392b}
.sticky-text{flex:1;min-height:0;width:100%;resize:none;border:none;background:transparent;outline:none;padding:6px 12px 14px;font-family:var(--pen);font-size:23px;line-height:1.25;color:#2b2618}
.sticky-text::placeholder{color:rgba(0,0,0,.3)}

.note{margin:0;font-size:12px;color:var(--muted);line-height:1.6}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);display:flex;align-items:center;gap:12px;background:var(--ink);color:#fff;padding:10px 12px 10px 18px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:1000;max-width:calc(100% - 32px)}
.toast.is-show{opacity:1;transform:translate(-50%,0);pointer-events:auto}
.toast button{height:28px;padding:0 12px;border:none;border-radius:999px;background:var(--accent);color:var(--ink);font-weight:700;font-size:12.5px;cursor:pointer}

@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:14px 16px 40px}
  .toolbar{gap:10px 14px;padding:10px 12px;top:4px}
  .tb-group--end{margin-left:0;width:100%}
  .tb-group--end .btn{flex:1;padding:0 8px}
  .swatch{width:24px;height:24px}
  .board{border-radius:16px;box-shadow:inset 0 0 0 6px #c9a97a,inset 0 0 0 7px rgba(0,0,0,.08)}
  .sticky-text{font-size:20px;padding:4px 10px 12px}
  .tool{width:26px}
}
@media (prefers-reduced-motion:reduce){ *{animation:none !important;transition:none !important} }

/* 다크 모드 (인쇄는 라이트 그대로). 코르크판은 어두운 톤으로, 포스트잇 색은 그대로 */
@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:#f2c230;
    --cork:#3a3027;
  }
  :root[data-theme="dark"] .btn{background:transparent}
  :root[data-theme="dark"] .btn:hover{background:var(--hover)}
  :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:#f6d465}
  :root[data-theme="dark"] .swatch{border-color:rgba(255,255,255,.12)}
  :root[data-theme="dark"] .swatch[aria-checked="true"]{box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--ink)}
  :root[data-theme="dark"] .seg button.is-active{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .board{background-image:radial-gradient(rgba(0,0,0,.28) 1px,transparent 1.4px),radial-gradient(rgba(255,255,255,.06) 1px,transparent 1.4px);
    box-shadow:inset 0 0 0 10px #5a4630,inset 0 0 0 11px rgba(0,0,0,.3),inset 0 8px 30px rgba(0,0,0,.35)}
  :root[data-theme="dark"] .board-empty{color:rgba(233,220,196,.55)}
  :root[data-theme="dark"] .sticky{box-shadow:0 1px 1px rgba(0,0,0,.2),0 10px 18px -6px rgba(0,0,0,.6)}
  :root[data-theme="dark"] .sticky:focus-within{box-shadow:0 1px 1px rgba(0,0,0,.2),0 16px 28px -8px rgba(0,0,0,.7)}
  :root[data-theme="dark"] .sticky .tool:hover{color:#1c1c1a}
  :root[data-theme="dark"] .sticky .tool--del:hover{color:#c0392b}
  :root[data-theme="dark"] .toast button{color:#1c1c1a}
}
@media screen and (max-width:640px){
  :root[data-theme="dark"] .board{box-shadow:inset 0 0 0 6px #5a4630,inset 0 0 0 7px rgba(0,0,0,.3)}
}