/* IPE site — shared styles
 * Tailwind CDN과 함께 사용 (utility-first), 본 파일은 Tailwind로 표현 어려운
 * 세부 효과 (gradient, custom animation, scrollbar 등)만 담는다.
 */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #7d8590;
  --text-muted: #6e7681;
  --accent: #2f81f7;
  --accent-hover: #58a6ff;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --code-bg: #1f2428;
}

* { box-sizing: border-box; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Pretendard", "Apple SD Gothic Neo", sans-serif;
  -webkit-font-smoothing: antialiased;
  margin: 0;
  line-height: 1.6;
}

/* hero gradient */
.hero-gradient {
  background:
    radial-gradient(ellipse at top, rgba(47, 129, 247, 0.15), transparent 50%),
    radial-gradient(ellipse at bottom, rgba(63, 185, 80, 0.08), transparent 50%);
}

/* card */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
}
.badge-success { background: rgba(63, 185, 80, 0.15); color: var(--success); border-color: rgba(63, 185, 80, 0.4); }
.badge-warning { background: rgba(210, 153, 34, 0.15); color: var(--warning); border-color: rgba(210, 153, 34, 0.4); }
.badge-danger  { background: rgba(248, 81, 73, 0.15); color: var(--danger); border-color: rgba(248, 81, 73, 0.4); }
.badge-accent  { background: rgba(47, 129, 247, 0.15); color: var(--accent-hover); border-color: rgba(47, 129, 247, 0.4); }

/* code */
code, pre { font-family: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace; }
code {
  background: var(--code-bg);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.875em;
  color: #f0883e;
}
pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border);
}
pre code { background: transparent; padding: 0; color: var(--text-primary); }

/* link */
a { color: var(--accent-hover); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent); text-decoration: underline; }

/* nav */
.nav-link {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
  text-decoration: none;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-tertiary); text-decoration: none; }
.nav-link.active { color: var(--text-primary); background: var(--bg-tertiary); }

/* table */
table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
th, td { border-bottom: 1px solid var(--border); padding: 0.625rem 0.875rem; text-align: left; font-size: 0.9rem; }
th { color: var(--text-secondary); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
tbody tr:hover { background: var(--bg-tertiary); }

/* mermaid-like flow */
.flow-node {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  min-width: 100px;
}
.flow-arrow { color: var(--text-muted); font-size: 1.25rem; }

/* scroll bar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--border); }

/* canvas (chart.js) */
.chart-wrap { position: relative; height: 320px; }
@media (min-width: 768px) { .chart-wrap { height: 400px; } }

/* responsive section */
.section { max-width: 1200px; margin: 0 auto; padding: 4rem 1.5rem; }
.section-sm { padding: 2.5rem 1.5rem; }

/* hover lift */
.lift { transition: transform 0.2s, box-shadow 0.2s; }
.lift:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(0,0,0,0.4); }

/* divider */
.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), transparent);
  margin: 3rem 0;
}

/* tooltip-like cell */
.case-cell {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 6px;
  font-size: 0.75rem; font-weight: 700;
}
.case-pass { background: rgba(63, 185, 80, 0.2); color: var(--success); }
.case-fail { background: rgba(248, 81, 73, 0.15); color: var(--danger); }

/* expandable details */
details { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem 1rem; margin: 0.5rem 0; }
details[open] summary { margin-bottom: 0.5rem; }
summary { cursor: pointer; font-weight: 600; color: var(--text-primary); }
summary:hover { color: var(--accent-hover); }