: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:#1d7a55; /* 커팅 매트 그린 */
  --accent-soft:#e3f3ea;
  --mat:#1f4a3a; --mat-2:#2a5b48; --mat-line:rgba(255,255,255,.08); --mat-line-2:rgba(255,255,255,.16);
  --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)}
.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--small{height:30px;font-size:12px;align-self:flex-start}
.text-input{height:40px;padding:0 10px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font-family:var(--mono);font-size:14px;width:100%;min-width:0}
.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]{width:100%;accent-color:var(--accent)}
@media (max-width:640px){ .topbar{padding:14px 16px} }

.cr{flex:1;width:100%;max-width:1280px;margin:0 auto;padding:24px 28px 32px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start}
.mat-col{display:flex;flex-direction:column;gap:12px;min-width:0}
.ratios{display:flex;gap:6px;overflow-x:auto;padding:2px 2px 6px;scrollbar-width:thin}
.ratio{flex:0 0 auto;display:flex;align-items:center;gap:7px;height:36px;padding:0 12px;border:1px solid var(--line-2);border-radius:999px;background:var(--panel);font-size:12.5px;cursor:pointer;white-space:nowrap}
.ratio:hover{border-color:var(--ink-2)}
.ratio i{display:inline-block;height:13px;border:1.6px solid currentColor;border-radius:2px}
.ratio small{font-family:var(--mono);font-size:10.5px;color:var(--muted)}
.ratio[aria-checked="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.ratio[aria-checked="true"] small{color:rgba(255,255,255,.75)}

/* 커팅 매트: 1cm 격자 + 5cm 굵은 선 */
.mat{position:relative;display:flex;justify-content:center;align-items:center;padding:16px;border-radius:14px;min-height:300px;
  background:
    linear-gradient(var(--mat-line-2) 1px,transparent 1px) -1px -1px/100px 100px,
    linear-gradient(90deg,var(--mat-line-2) 1px,transparent 1px) -1px -1px/100px 100px,
    linear-gradient(var(--mat-line) 1px,transparent 1px) -1px -1px/20px 20px,
    linear-gradient(90deg,var(--mat-line) 1px,transparent 1px) -1px -1px/20px 20px,
    var(--mat);
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.2)}
.mat canvas{display:block;max-width:100%;touch-action:none;cursor:crosshair}
.mat-size{position:absolute;right:12px;bottom:8px;color:#cfe8dc;background:rgba(0,0,0,.25);padding:2px 8px;border-radius:999px}
.turn{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:10px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.tool{display:flex;align-items:center;gap:6px;height:38px;padding:0 12px;border:1px solid var(--line-2);border-radius:10px;background:var(--panel);font-size:12.5px;cursor:pointer}
.tool span{font-size:16px;line-height:1}
.tool:hover{border-color:var(--ink-2)}
.tool[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.tool--ghost{border-style:dashed}
.angle{flex:1;min-width:170px;display:flex;flex-direction:column;gap:2px;padding:0 6px}
.angle-label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12px;color:var(--ink-2)}
.angle .tb-presets{margin-top:4px;gap:4px}
.angle .tb-presets button{min-width:34px;padding:0 7px}

.panel{display:flex;flex-direction:column;gap:12px;min-width:0;position:sticky;top:16px}
.card{display:flex;flex-direction:column;gap:12px;padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:16px}
.card-title{margin:0;font-size:14px;font-weight:700}
.card-title small{font-family:var(--mono);font-weight:400;color:var(--muted);font-size:11px}
.grid4{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mini{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--ink-2);min-width:0}
.field{display:flex;flex-direction:column;gap:6px}
.field-label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2)}
.field .tb-presets{margin-top:2px}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px;border:1px solid var(--line)}
.seg-btn{flex:1;height:30px;border:none;background:transparent;border-radius:999px;font-size:11.5px;color:var(--sub);cursor:pointer;white-space:nowrap;padding:0 4px}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.card--save{background:var(--panel-soft)}
.result{display:flex;justify-content:space-between;align-items:baseline;padding:10px 12px;border-radius:10px;background:var(--mat);color:#fff}
.result .mono-label{color:#a9cdbd}
.result b{font-family:var(--mono);font-size:18px;font-weight:500}
.btn--save{height:46px;font-size:14px;background:var(--accent)}
.btn--save:hover{background:#155e41}
.note{margin:0;font-size:12px;line-height:1.6;color:var(--muted)}
.keys{margin:0;font-size:11.5px;color:var(--muted);padding:0 4px}
.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)}

@media (max-width:900px){
  .cr{grid-template-columns:minmax(0,1fr)}
  .panel{position:static}
  .grid4{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:640px){
  .cr{padding:16px;gap:16px}
  .actions{width:100%}
  .actions .btn{flex:1}
  .mat{padding:8px 4px;min-height:220px}
  .turn{gap:6px}
  .tool{flex:1;justify-content:center;padding:0 6px}
  .angle{flex-basis:100%;order:5;padding:4px 2px 0}
  .tool--ghost{order:6;flex-basis:100%}
  .grid4{grid-template-columns:1fr 1fr}
  .keys{display:none}
}
@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) — 커팅 매트는 원래 어두운 초록 그대로, 사진은 원래 색 그대로 */
@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:#4cc495; --accent-soft:rgba(76,196,149,.14);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast,
  :root[data-theme="dark"] .ratio[aria-checked="true"],
  :root[data-theme="dark"] .tb-presets button[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .ratio[aria-checked="true"] small{color:rgba(20,19,24,.7)}
  :root[data-theme="dark"] .btn--save{background:var(--accent)}
  :root[data-theme="dark"] .btn--save:hover{background:#3db585}
  :root[data-theme="dark"] .mat{box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
}