/* DevToolbox 공통 스타일 */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #57606a;
  --border: #d8dee4;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --ok: #16a34a;
  --err: #dc2626;
  --code-bg: #eef1f5;
  --diff-add: #d1f4d9;
  --diff-del: #ffd7d5;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
  --bg: #0d1117;
  --card: #161b22;
  --text: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --ok: #3fb950;
  --err: #f85149;
  --code-bg: #1c2129;
  --diff-add: #12351c;
  --diff-del: #3c1618;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.2s, color 0.2s;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 헤더 */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.logo span { color: var(--accent); }

.header-actions { display: flex; align-items: center; gap: 8px; }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text);
}

.theme-toggle:hover { border-color: var(--accent); }

.game-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 6px 10px;
  text-decoration: none;
  white-space: nowrap;
}

.game-link:hover { background: var(--accent); color: #fff; }

/* 도구 네비게이션 */
.tool-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  padding: 6px 0 10px;
}

.tool-nav a {
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}

.tool-nav a:hover { color: var(--accent); border-color: var(--border); }

.tool-nav a.active {
  background: var(--accent);
  color: #fff;
}

/* 메인 */
main.container { padding-top: 28px; padding-bottom: 48px; }

h1 { font-size: 1.6rem; margin: 0 0 8px; }

.page-desc { color: var(--muted); margin: 0 0 16px; }

.privacy-badge {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent);
  border-radius: 8px;
  padding: 6px 12px;
  margin-bottom: 20px;
}

/* 카드/폼 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 6px; }

textarea, input[type="text"], input[type="number"], input[type="datetime-local"], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
}

textarea {
  font-family: "SF Mono", "Consolas", "D2Coding", monospace;
  font-size: 0.88rem;
  min-height: 160px;
  resize: vertical;
}

textarea:focus, input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }

button.btn {
  padding: 9px 18px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}

button.btn:hover { background: var(--accent-hover); }

button.btn.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

button.btn.secondary:hover { border-color: var(--accent); color: var(--accent); }

.result-msg { font-size: 0.9rem; margin: 10px 0; min-height: 1.4em; }
.result-msg.ok { color: var(--ok); }
.result-msg.err { color: var(--err); }

.output-box {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: "SF Mono", "Consolas", "D2Coding", monospace;
  font-size: 0.88rem;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 48px;
  overflow-x: auto;
}

/* 통계 그리드 (글자수 세기 등) */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.stat-item {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}

.stat-item .num { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.stat-item .lbl { font-size: 0.8rem; color: var(--muted); }

/* 홈 도구 목록 */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.15s, border-color 0.15s;
}

.tool-card:hover { transform: translateY(-3px); border-color: var(--accent); }

.tool-card .icon { font-size: 1.8rem; }
.tool-card h2 { font-size: 1.05rem; margin: 10px 0 6px; }
.tool-card p { font-size: 0.85rem; color: var(--muted); margin: 0; }

/* 광고 영역 */
.ad-slot {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin: 28px 0;
  background: var(--card);
}

/* 설명 아티클 */
.tool-article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 28px;
}

.tool-article h2 { font-size: 1.15rem; margin-top: 0; }
.tool-article h2:not(:first-child) { margin-top: 24px; }
.tool-article p { font-size: 0.92rem; color: var(--text); }
.tool-article ul { font-size: 0.92rem; padding-left: 20px; }
.tool-article li { margin-bottom: 6px; }

/* diff 결과 */
.diff-line { display: block; padding: 1px 8px; }
.diff-line.add { background: var(--diff-add); }
.diff-line.del { background: var(--diff-del); }

/* 정규식 하이라이트 */
mark.rx {
  background: color-mix(in srgb, var(--accent) 30%, transparent);
  color: inherit;
  border-radius: 3px;
  padding: 0 1px;
}

/* 2단 레이아웃 */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

@media (max-width: 640px) {
  .two-col { grid-template-columns: 1fr; }
  h1 { font-size: 1.35rem; }
}

/* 색상 미리보기 */
.color-preview {
  width: 100%;
  height: 80px;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin: 12px 0;
}

/* 푸터 */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* 비밀번호 강도 바 */
.strength-track {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
  margin-top: 8px;
}

.strength-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  transition: width 0.2s, background 0.2s;
}

/* 마크다운 미리보기 */
.markdown-preview {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  min-height: 320px;
  overflow-y: auto;
  font-size: 0.92rem;
}

.markdown-preview h1, .markdown-preview h2, .markdown-preview h3 { margin-top: 0.6em; }
.markdown-preview pre { background: var(--code-bg); padding: 10px; border-radius: 6px; overflow-x: auto; }
.markdown-preview code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: "SF Mono", "Consolas", "D2Coding", monospace;
  font-size: 0.85em;
}
.markdown-preview pre code { background: none; padding: 0; }
.markdown-preview blockquote {
  border-left: 3px solid var(--border);
  margin: 0.6em 0;
  padding: 0.2em 12px;
  color: var(--muted);
}
.markdown-preview table { border-collapse: collapse; }
.markdown-preview table th, .markdown-preview table td { border: 1px solid var(--border); padding: 6px 10px; }
.markdown-preview img { max-width: 100%; }

/* 색상 팔레트 스와치 */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.swatch {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--card);
}

.swatch .swatch-color { height: 70px; }

.swatch .swatch-label {
  padding: 8px;
  font-size: 0.78rem;
  text-align: center;
  font-family: "SF Mono", "Consolas", "D2Coding", monospace;
}

.swatch .swatch-label .role {
  color: var(--muted);
  display: block;
  margin-bottom: 2px;
  font-family: inherit;
}

/* FAQ 아코디언 */
.tool-article details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 10px;
  background: var(--code-bg);
}

.tool-article details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
}

.tool-article details summary::-webkit-details-marker { display: none; }

.tool-article details summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  color: var(--accent);
  transition: transform 0.15s;
}

.tool-article details[open] summary::before { transform: rotate(90deg); }

.tool-article details p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* 가이드(블로그형) 목록 */
.guide-list { display: grid; gap: 12px; margin-top: 14px; }
.guide-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--text);
}
.guide-card:hover { border-color: var(--accent); }
.guide-card h3 { margin: 0 0 4px; font-size: 1rem; }
.guide-card p { margin: 0; font-size: 0.85rem; color: var(--muted); }

/* cron 필드 */
.cron-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

table.simple-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.simple-table th, table.simple-table td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

table.simple-table th { background: var(--code-bg); }

/* 이미지 압축기 */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 30px 20px;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
  transition: border-color 0.15s, background 0.15s;
}

.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: var(--code-bg); }

.dropzone input[type="file"] { display: none; }

.image-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}

.image-compare figure { margin: 0; text-align: center; }
.image-compare img {
  max-width: 100%;
  max-height: 260px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--code-bg);
  object-fit: contain;
}
.image-compare figcaption { font-size: 0.82rem; color: var(--muted); margin-top: 6px; }

@media (max-width: 640px) {
  .image-compare { grid-template-columns: 1fr; }
}