/* ============================================================
   붕어빵 스킨 시스템 — 서비스마다 이 :root 토큰만 바꾼다.
   구조/컴포넌트 스타일은 아래 공통부이며 원칙적으로 수정하지 않는다.
   ============================================================ */
:root {
  --accent: #7c3aed;
  --accent-strong: #5d2bb1;
  --bg: #f8fafc;
  --surface: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --radius: 14px;
  --maxw: 720px;
  --font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont,
          'Apple SD Gothic Neo', 'Segoe UI', 'Malgun Gothic', sans-serif;
}
[data-theme="dark"] {
  --bg: #0b1220;
  --surface: #131c2e;
  --ink: #e2e8f0;
  --muted: #94a3b8;
  --line: #253349;
}
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --bg: #0b1220;
    --surface: #131c2e;
    --ink: #e2e8f0;
    --muted: #94a3b8;
    --line: #253349;
  }
}

/* ---------- 공통부 (수정 금지 영역) ---------- */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex; justify-content: space-between; align-items: center;
  max-width: var(--maxw); margin: 0 auto; padding: 16px 20px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--ink); letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.header-actions button {
  background: none; border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink); font-size: 16px; width: 36px; height: 36px;
  cursor: pointer; margin-left: 6px;
}
.header-actions button:hover { border-color: var(--accent); }

main { max-width: var(--maxw); margin: 0 auto; padding: 8px 20px 64px; }

.hero { text-align: center; padding: 28px 0 8px; }
.hero h1 { font-size: clamp(26px, 5vw, 36px); letter-spacing: -0.03em; line-height: 1.25; margin: 0 0 12px; }
.hero .lede { color: var(--muted); font-size: 17px; margin: 0 auto; max-width: 54ch; }

.tool-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin: 28px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.placeholder-note { color: var(--muted); text-align: center; }

/* 도구 공통 위젯 */
.tool-card label { display: block; font-weight: 600; font-size: 14px; margin: 14px 0 6px; }
.tool-card input[type="text"], .tool-card input[type="number"],
.tool-card select, .tool-card textarea {
  width: 100%; padding: 12px 14px; font-size: 16px; font-family: inherit;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--ink);
}
.tool-card input:focus, .tool-card select:focus, .tool-card textarea:focus {
  outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent;
}
.btn {
  display: inline-block; padding: 12px 22px; font-size: 16px; font-weight: 700;
  font-family: inherit; border: none; border-radius: 10px; cursor: pointer;
  background: var(--accent); color: #fff; margin-top: 18px;
}
.btn:hover { background: var(--accent-strong); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.result {
  margin-top: 20px; padding: 18px; border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line));
  font-size: 17px;
}
.result strong { font-size: 22px; color: var(--accent-strong); }
[data-theme="dark"] .result strong,
[data-theme="auto"] .result strong { color: var(--accent); }

.ad-slot { margin: 24px 0; min-height: 0; text-align: center; }

.faq h2 { font-size: 20px; margin: 40px 0 12px; letter-spacing: -0.01em; }
.faq details {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 16px; margin-bottom: 8px;
}
.faq summary { font-weight: 600; cursor: pointer; }
.faq p { color: var(--muted); margin: 8px 0 4px; }

.site-footer {
  border-top: 1px solid var(--line);
  text-align: center; color: var(--muted); font-size: 13.5px;
  padding: 20px; margin-top: 40px;
}

@media (max-width: 480px) {
  .tool-card { padding: 20px 16px; }
}