/* 코바늘 패턴 도구 — 사이트 공통 스타일 (도구 페이지와 같은 색) */
:root{
  --paper:#F3EFE4; --paper-2:#EAE3D2; --card:#FBF8F1;
  --ink:#24261F; --ink-soft:#4E5045; --ink-faint:#7A7B6E;
  --teal:#1F5C52; --teal-dark:#164941; --mustard:#DFA53C; --berry:#9C3848;
  --line:rgba(36,38,31,0.14); --line-strong:rgba(36,38,31,0.24);
  --shadow:0 1px 2px rgba(36,38,31,0.05), 0 6px 18px rgba(36,38,31,0.06);
  --sans:'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif;
  --mono:ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#181915; --paper-2:#26271F; --card:#1F201B;
    --ink:#ECE8DC; --ink-soft:#BEBAAD; --ink-faint:#8E8B80;
    --teal:#62B5A4; --teal-dark:#4E9C8C; --mustard:#E5B04D; --berry:#E58593;
    --line:rgba(236,232,220,0.12); --line-strong:rgba(236,232,220,0.24);
    --shadow:0 1px 2px rgba(0,0,0,0.3), 0 6px 18px rgba(0,0,0,0.25);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#181915; --paper-2:#26271F; --card:#1F201B;
  --ink:#ECE8DC; --ink-soft:#BEBAAD; --ink-faint:#8E8B80;
  --teal:#62B5A4; --teal-dark:#4E9C8C; --mustard:#E5B04D; --berry:#E58593;
  --line:rgba(236,232,220,0.12); --line-strong:rgba(236,232,220,0.24);
  --shadow:0 1px 2px rgba(0,0,0,0.3), 0 6px 18px rgba(0,0,0,0.25);
  color-scheme:dark;
}
*{ box-sizing:border-box; }
html,body{ margin:0; }
body{ background:var(--paper); color:var(--ink); font-family:var(--sans); line-height:1.65;
      -webkit-font-smoothing:antialiased; }
a{ color:var(--teal); }
img{ max-width:100%; height:auto; }
.wrap{ max-width:1080px; margin:0 auto; padding:0 20px; }
.narrow{ max-width:760px; }

/* 머리말 */
.site-head{ position:sticky; top:0; z-index:10; background:var(--card); border-bottom:1px solid var(--line);
            padding-top:env(safe-area-inset-top,0px); }
.head-row{ display:flex; align-items:center; gap:20px; height:58px; }
.logo{ display:flex; align-items:center; gap:9px; color:var(--ink); text-decoration:none; font-weight:800; font-size:16.5px; white-space:nowrap; }
.logo-mark{ width:30px; height:30px; border-radius:8px; background:var(--teal); color:var(--paper);
            display:inline-flex; align-items:center; justify-content:center; flex-shrink:0; }
.logo-mark svg{ width:18px; height:18px; }
.logo-mark.sm{ width:22px; height:22px; border-radius:6px; margin-right:8px; vertical-align:-5px; }
.logo-mark.sm svg{ width:13px; height:13px; }
.logo-text{ display:flex; align-items:baseline; gap:7px; }
.logo-text small{ font-size:11.5px; font-weight:600; color:var(--ink-faint); letter-spacing:0.02em; }
@media (max-width: 380px){ .logo-text small{ display:none; } }
.nav{ display:flex; gap:4px; margin-left:auto; }
.nav a, .nav-drop a{ color:var(--ink-soft); text-decoration:none; font-weight:600; font-size:14.5px; padding:8px 12px; border-radius:9px; white-space:nowrap; }
.nav a:hover, .nav-drop a:hover{ background:var(--paper-2); color:var(--ink); }
.nav a[aria-current="page"], .nav-drop a[aria-current="page"]{ color:var(--teal); background:var(--paper-2); }
.nav-mobile{ display:none; margin-left:auto; position:relative; }
.nav-mobile summary{ list-style:none; width:40px; height:40px; border-radius:10px; display:flex; align-items:center; justify-content:center; cursor:pointer; color:var(--ink); }
.nav-mobile summary::-webkit-details-marker{ display:none; }
.nav-mobile summary svg{ width:22px; height:22px; }
.nav-mobile[open] summary{ background:var(--paper-2); }
.nav-drop{ position:absolute; right:0; top:46px; background:var(--card); border:1px solid var(--line); border-radius:12px;
           box-shadow:var(--shadow); padding:6px; display:flex; flex-direction:column; min-width:180px; }
@media (max-width: 760px){ .nav{ display:none; } .nav-mobile{ display:block; } }

/* 본문 공통 */
.site-main{ padding:36px 0 64px; min-height:60vh; }
h1{ font-size:clamp(26px, 4vw, 36px); line-height:1.25; letter-spacing:-0.02em; margin:0 0 12px; }
h2{ font-size:22px; letter-spacing:-0.01em; margin:44px 0 12px; line-height:1.35; }
h3{ font-size:17px; margin:28px 0 8px; }
.lead{ font-size:17px; color:var(--ink-soft); margin:0 0 24px; }
.muted{ color:var(--ink-faint); font-size:14px; }
.btn{ display:inline-flex; align-items:center; gap:8px; height:46px; padding:0 20px; border-radius:12px;
      background:var(--teal); color:var(--paper); text-decoration:none; font-weight:700; font-size:15px; border:none; cursor:pointer; }
.btn:hover{ background:var(--teal-dark); }
.btn.ghost{ background:var(--card); color:var(--ink); border:1px solid var(--line-strong); }
.btn.ghost:hover{ background:var(--paper-2); }
.btn-row{ display:flex; gap:10px; flex-wrap:wrap; }
.card{ background:var(--card); border:1px solid var(--line); border-radius:16px; box-shadow:var(--shadow); }

/* 홈 */
.hero{ display:grid; grid-template-columns:1.1fr 1fr; gap:36px; align-items:center; padding:12px 0 8px; }
.hero h1{ font-size:clamp(30px, 5vw, 46px); }
.hero-art{ border-radius:18px; overflow:hidden; background:var(--paper-2); }
.hero-art img{ display:block; width:100%; image-rendering:pixelated; }
@media (max-width: 820px){ .hero{ grid-template-columns:1fr; } }
.tool-cards{ display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:16px; }
@media (max-width: 700px){ .tool-cards{ grid-template-columns:1fr; } }
.tool-card{ display:flex; flex-direction:column; gap:8px; padding:22px; text-decoration:none; color:var(--ink); transition:transform 120ms ease; }
.tool-card:hover{ transform:translateY(-2px); }
.tool-card .ic{ width:42px; height:42px; border-radius:11px; background:var(--paper-2); color:var(--teal); display:flex; align-items:center; justify-content:center; }
.tool-card .ic svg{ width:24px; height:24px; }
.tool-card h3{ margin:6px 0 0; font-size:19px; }
.tool-card p{ margin:0; color:var(--ink-soft); font-size:14.5px; }
.tool-card .go{ margin-top:auto; padding-top:6px; color:var(--teal); font-weight:700; font-size:14px; }
.feature-list{ display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:14px; padding:0; margin:0; list-style:none; }
@media (max-width: 760px){ .feature-list{ grid-template-columns:1fr; } }
.feature-list li{ padding:16px 18px; }
.feature-list b{ display:block; margin-bottom:4px; }
.feature-list span{ color:var(--ink-soft); font-size:14px; }
.faq details{ padding:14px 18px; margin-bottom:10px; }
.faq summary{ cursor:pointer; font-weight:700; }
.faq p{ margin:10px 0 2px; color:var(--ink-soft); }

/* 예시 도안 */
.ex-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(250px, 1fr)); gap:18px; }
.ex-card{ overflow:hidden; display:flex; flex-direction:column; }
.ex-card .thumb{ background:var(--paper-2); aspect-ratio:4 / 3; display:flex; align-items:center; justify-content:center; padding:14px; }
.ex-card .thumb{ overflow:hidden; }
.ex-card .thumb img{ width:100%; height:100%; object-fit:contain; image-rendering:pixelated; border-radius:4px; }
.ex-body{ padding:14px 16px 16px; display:flex; flex-direction:column; gap:6px; flex:1; }
.ex-body h3{ margin:0; font-size:16.5px; }
.ex-body p{ margin:0; color:var(--ink-soft); font-size:14px; }
.ex-meta{ font-family:var(--mono); font-size:12.5px; color:var(--ink-faint); }
.ex-body .btn{ margin-top:auto; height:40px; font-size:14px; align-self:flex-start; }

/* 가이드 */
.guide-list{ display:grid; gap:14px; }
.guide-item{ display:block; padding:20px 22px; text-decoration:none; color:var(--ink); }
.guide-item h3{ margin:0 0 4px; font-size:18px; }
.guide-item p{ margin:0; color:var(--ink-soft); font-size:14.5px; }
.article h2{ margin-top:40px; }
.article table{ width:100%; border-collapse:collapse; margin:14px 0 20px; font-size:14.5px; background:var(--card); border-radius:12px; overflow:hidden; }
.article th, .article td{ padding:10px 12px; border-bottom:1px solid var(--line); text-align:left; }
.article th{ background:var(--paper-2); font-weight:700; }
.article .formula{ font-family:var(--mono); background:var(--card); border:1px solid var(--line); border-radius:10px; padding:12px 14px; margin:10px 0; }
.article .todo{ background:rgba(223,165,60,0.14); border-left:4px solid var(--mustard); padding:10px 14px; border-radius:8px; color:var(--ink-soft); font-size:14px; }
.article .cta{ margin-top:36px; padding:20px 22px; }
.crumb{ font-size:13.5px; color:var(--ink-faint); margin-bottom:10px; }
.crumb a{ color:var(--ink-faint); }

/* 코수 세기 */
.counter-wrap{ max-width:520px; margin:0 auto; }

/* 꼬리말 */
.site-foot{ border-top:1px solid var(--line); background:var(--card); padding:26px 0 calc(env(safe-area-inset-bottom,0px) + 26px); }
.foot-row{ display:flex; flex-wrap:wrap; gap:14px 28px; align-items:center; justify-content:space-between; }
.foot-brand{ font-weight:800; display:flex; align-items:center; flex-wrap:wrap; }
.foot-tag{ font-weight:500; color:var(--ink-faint); font-size:13.5px; margin-left:10px; }
.foot-links{ display:flex; gap:18px; flex-wrap:wrap; }
.foot-links a{ color:var(--ink-soft); text-decoration:none; font-size:14px; }
.foot-links a:hover{ color:var(--ink); text-decoration:underline; }
.foot-copy{ margin-top:12px; font-size:12.5px; color:var(--ink-faint); }