/* 「AI와 대화하는 기술」 실습실 — 공통 스타일 */

:root {
  --primary: #143C60;
  --primary-light: #2563eb;
  --bg: #fafafa;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --text-soft: #6b7280;
  --bad: #dc2626;
  --good: #059669;
  --code-bg: #f5f5f5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-header h1 { margin: 0; font-size: 16px; font-weight: 600; color: var(--primary); }
.site-header h1 .sub { color: var(--text-soft); font-weight: 400; margin-left: 8px; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.container.narrow { max-width: 760px; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 { margin-top: 0; font-size: 18px; color: var(--primary); }
.card h3 { font-size: 15px; color: #374151; margin-bottom: 8px; }

/* 키 관리 */
.key-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.key-bar select, .key-bar input, .key-bar button {
  font-size: 13px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
}
.key-bar input { flex: 1; min-width: 200px; }
.key-bar button {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  cursor: pointer;
}
.key-bar button:hover { opacity: 0.9; }
.key-bar button.ghost { background: white; color: var(--text); border-color: var(--border); }
.key-status { font-size: 12px; color: var(--text-soft); margin-left: auto; }
.key-status.ok { color: var(--good); }
.key-status.demo { color: #d97706; }

/* 시나리오 탭 */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  overflow-x: auto;
}
.tab {
  padding: 10px 14px;
  font-size: 14px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  color: var(--text-soft);
  font-family: inherit;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab:hover { color: var(--text); }

/* 좌우 분할 */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 800px) {
  .split { grid-template-columns: 1fr; }
}

.pane {
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  display: flex;
  flex-direction: column;
}
.pane.bad { border-top: 3px solid var(--bad); }
.pane.good { border-top: 3px solid var(--good); }

.pane h4 {
  margin: 0 0 8px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.pane.bad h4::before { content: "✗"; color: var(--bad); font-weight: 700; }
.pane.good h4::before { content: "✓"; color: var(--good); font-weight: 700; }

.prompt-box {
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px;
  font-family: 'D2Coding', ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  margin-bottom: 10px;
  max-height: 280px;
  overflow-y: auto;
}

.run-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}
.run-btn:hover { opacity: 0.9; }
.run-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.run-btn.outline { background: white; color: var(--primary); border: 1px solid var(--primary); }

.output {
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px;
  margin-top: 10px;
  font-size: 13.5px;
  white-space: pre-wrap;
  flex: 1;
  min-height: 80px;
}
.output.empty { color: var(--text-soft); font-style: italic; }
.output.loading::after {
  content: "...";
  animation: dots 1s steps(3, end) infinite;
}
@keyframes dots {
  0%, 20% { content: "."; }
  40% { content: ".."; }
  60%, 100% { content: "..."; }
}

.note {
  font-size: 12.5px;
  color: var(--text-soft);
  margin-top: 8px;
  padding: 8px;
  background: #fffbeb;
  border-left: 3px solid #f59e0b;
}

.diff-summary {
  background: #f0f9ff;
  border-left: 3px solid #2563eb;
  padding: 10px 14px;
  margin-top: 16px;
  font-size: 13.5px;
}
.diff-summary strong { color: var(--primary); }

.scenario-desc {
  background: #fafafa;
  border-left: 3px solid var(--primary);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 13.5px;
}

/* 챕터 카드 (랜딩) */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.chapter-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  display: block;
  color: inherit;
  transition: all 0.15s;
}
.chapter-card:hover { border-color: var(--primary); transform: translateY(-2px); text-decoration: none; }
.chapter-card.disabled { opacity: 0.5; pointer-events: none; }
.chapter-card .badge {
  display: inline-block;
  font-size: 11px;
  background: #e0f2fe;
  color: #0369a1;
  padding: 2px 8px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.chapter-card .badge.coming { background: #f3f4f6; color: var(--text-soft); }
.chapter-card h3 { margin: 0 0 4px; font-size: 16px; color: var(--primary); }
.chapter-card p { margin: 0; font-size: 13.5px; color: var(--text-soft); }

footer.site-footer {
  margin-top: 60px;
  padding: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-soft);
  border-top: 1px solid var(--border);
}