/* ==========================================================================
   DRACULA THEME — Airfoil CFD Wind Tunnel Report (Minimalist)
   Inspired by Digital CV project styling
   ========================================================================== */

:root {
  --background: #282a36;
  --current-line: #44475a;
  --foreground: #f8f8f2;
  --comment: #6272a4;
  --cyan: #8be9fd;
  --green: #50fa7b;
  --orange: #ffb86c;
  --pink: #ff79c6;
  --purple: #bd93f9;
  --red: #ff5555;
  --yellow: #f1fa8c;
  --card-bg: #21222c;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--background);
  color: var(--foreground);
  font-family: 'Meslo LG L', 'JetBrains Mono', monospace;
  line-height: 1.7;
  padding-left: 240px;
  min-height: 100vh;
}

h1 { color: var(--purple); font-size: 2em; margin-top: 0; text-align: center; }
h2 { color: var(--pink); font-size: 1.5em; margin: 2em 0 0.8em; border-bottom: 1px solid var(--current-line); padding-bottom: 0.3em; }
h3 { color: var(--purple); font-size: 1.15em; margin: 1.5em 0 0.5em; }
h4 { color: var(--cyan); font-size: 1em; margin: 1.2em 0 0.4em; }
p { margin-bottom: 1em; font-size: 0.95em; }
a { color: var(--cyan); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--pink); }
code { background: rgba(0,0,0,0.25); padding: 2px 6px; border-radius: 4px; color: var(--yellow); font-size: 0.9em; }
pre code { background: none; padding: 0; }
ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.3rem; font-size: 0.95em; }

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 240px;
  height: 100vh;
  background: var(--card-bg);
  border-right: 1px solid var(--current-line);
  overflow-y: auto;
  padding: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
}
.sidebar-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--current-line);
}
.sidebar-brand a {
  color: var(--purple);
  font-size: 0.82em;
  font-weight: 700;
  text-decoration: none;
  line-height: 1.3;
}
.sidebar-brand a:hover { color: var(--pink); }
.sidebar-nav {
  flex: 1;
  padding: 16px 0 24px;
  overflow-y: auto;
}
.nav-section { margin-bottom: 20px; }
.nav-heading {
  padding: 4px 20px;
  font-size: 0.6em;
  color: var(--comment);
  text-transform: uppercase;
  letter-spacing: 1.8px;
  margin-bottom: 2px;
}
.nav-item {
  display: block;
  padding: 6px 20px 6px 28px;
  font-size: 0.78em;
  color: var(--foreground);
  text-decoration: none;
  transition: all 0.15s;
  border-left: 2px solid transparent;
}
.nav-item:hover {
  color: var(--cyan);
  background: rgba(0,0,0,0.12);
  border-left-color: var(--pink);
}
.nav-item.active {
  color: var(--pink);
  border-left-color: var(--pink);
  background: rgba(0,0,0,0.08);
}
@media (max-width: 720px) {
  body { padding-left: 0; }
  .sidebar { display: none; }
  .sidebar-toggle {
    display: block;
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 200;
    background: var(--card-bg);
    border: 1px solid var(--current-line);
    color: var(--foreground);
    padding: 8px 12px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8em;
  }
  .sidebar.open { display: flex; }
}

/* --- Container --- */
.container { max-width: 1000px; width: 90%; margin: 0 auto; padding: 40px 0; box-sizing: border-box; }

/* --- Hero --- */
.hero { text-align: center; padding: 3rem 0 1rem; }
.hero h1 { margin-bottom: 0.5rem; }
.hero p { max-width: 700px; margin: 0 auto; color: var(--comment); font-size: 0.95em; }

/* --- Divider --- */
.divider { border: 0; border-top: 1px solid var(--current-line); margin: 40px 0; }

/* --- Card grid (methodology) --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 20px 0;
}
.card {
  background: var(--card-bg);
  border-left: 4px solid var(--purple);
  padding: 20px;
}
.card h4 { color: var(--cyan); margin-bottom: 0.5rem; font-size: 1em; }
.card p { font-size: 0.9em; color: var(--foreground); margin-bottom: 0; }
.tag {
  display: inline-block;
  background: var(--current-line);
  padding: 2px 10px;
  margin-bottom: 10px;
  border-radius: 4px;
  font-size: 0.75em;
  color: var(--cyan);
}

/* --- Figure containers (mesh images) --- */
.figure-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 20px 0;
}
@media (min-width: 800px) {
  .figure-row { grid-template-columns: 1fr 1fr; }
  .figure-row .wide { grid-column: span 2; }
}
.figure {
  background: var(--card-bg);
  border: 1px solid var(--current-line);
  border-radius: 6px;
  padding: 10px;
  overflow: hidden;
}
.figure img { width: 100%; height: auto; display: block; border-radius: 4px; }
.figure-caption {
  font-size: 0.75em;
  color: var(--comment);
  text-align: center;
  margin-top: 8px;
}

/* --- Callout box --- */
.callout {
  background: var(--card-bg);
  border-left: 4px solid var(--green);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 0.88em;
}
.callout-tag {
  font-size: 0.7em;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

/* --- Metric cards (individual per-AoA) --- */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 12px 0 20px;
}
.metric-card {
  background: var(--card-bg);
  padding: 14px;
  text-align: center;
  border-top: 3px solid var(--cyan);
}
.metric-card.lift { border-top-color: var(--purple); }
.metric-card.drag { border-top-color: var(--pink); }
.metric-card.ratio { border-top-color: var(--green); }
.metric-label {
  font-size: 0.7em;
  color: var(--comment);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}
.metric-value {
  font-size: 1.4em;
  font-weight: 700;
  font-family: 'Meslo LG L', monospace;
}

/* --- Tables --- */
table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.88em; }
th {
  background: var(--card-bg);
  color: var(--cyan);
  padding: 10px 12px;
  text-align: left;
  border-bottom: 2px solid var(--current-line);
}
td { padding: 8px 12px; border-bottom: 1px solid rgba(255,255,255,0.04); }

/* --- Results summary --- */
.results-table { font-size: 0.85em; }

/* --- Aggregate plots --- */
.aggregate-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 20px 0;
}
@media (min-width: 800px) {
  .aggregate-grid { grid-template-columns: 1fr 1fr; }
  .aggregate-grid .wide { grid-column: 1 / -1; }
}
.aggregate-figure {
  background: var(--card-bg);
  border: 1px solid var(--current-line);
  border-radius: 6px;
  padding: 10px;
  overflow: hidden;
}
.aggregate-figure img { width: 100%; height: auto; display: block; border-radius: 4px; }
.aggregate-label {
  font-size: 0.75em;
  color: var(--cyan);
  text-align: center;
  margin-bottom: 8px;
}

/* --- AoA nav --- */
.aoa-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 20px 0;
}
.aoa-nav a {
  background: var(--card-bg);
  color: var(--comment);
  padding: 6px 16px;
  border-radius: 4px;
  font-size: 0.8em;
  transition: all 0.2s;
}
.aoa-nav a:hover { color: var(--cyan); background: var(--current-line); }

/* --- Per-AoA section (no enclosing box) --- */
.aoa-section { margin-bottom: 30px; }

.metrics-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin: 10px 0 16px;
  font-size: 0.95em;
}
.metrics-row span { color: var(--foreground); }

.vis-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.vis-card {
  background: var(--card-bg);
  border: 1px solid var(--current-line);
  border-radius: 6px;
  overflow: hidden;
}
.vis-card-label {
  font-size: 0.75em;
  color: var(--cyan);
  padding: 8px 12px;
  border-bottom: 1px solid var(--current-line);
}
.vis-card img {
  width: 100%; height: auto; display: block;
}

/* --- Comparison grid (baseline vs optimized side-by-side) --- */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}
.compare-figure {
  background: var(--card-bg);
  border: 1px solid var(--current-line);
  border-radius: 6px;
  overflow: hidden;
}
.compare-figure img { width: 100%; height: auto; display: block; }
.compare-label {
  font-size: 0.75em;
  color: var(--cyan);
  text-align: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--current-line);
}
@media (max-width: 720px) {
  .compare-grid { grid-template-columns: 1fr; }
}

/* --- Gallery grid (5-up velocity/pressure comparison) --- */
.gallery-section { margin: 30px 0; }
.gallery-section h3 { margin-bottom: 8px; }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: 12px 0 24px;
}
.gallery-card {
  background: var(--card-bg);
  border: 1px solid var(--current-line);
  border-radius: 6px;
  overflow: hidden;
}
.gallery-card img { width: 100%; height: auto; display: block; }
.gallery-label {
  font-size: 0.7em;
  color: var(--comment);
  text-align: center;
  padding: 6px 4px;
  border-top: 1px solid var(--current-line);
}
@media (max-width: 900px) {
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- Footer --- */
.site-footer {
  width: 100%;
  text-align: center;
  padding: 24px;
  color: var(--comment);
  border-top: 1px solid var(--current-line);
  margin-top: 20px;
  font-size: 0.8em;
}

/* --- Color helpers --- */
.hl-purple { color: var(--purple); font-weight: 700; }
.hl-pink { color: var(--pink); font-weight: 700; }
.hl-green { color: var(--green); font-weight: 700; }
.hl-cyan { color: var(--cyan); font-weight: 700; }

/* --- Code blocks (used in code.html) --- */
.code-block { margin: 1rem 0; }
.code-block details {
  background: var(--card-bg);
  border: 1px solid var(--current-line);
  border-radius: 6px;
  overflow: hidden;
}
.code-block summary {
  padding: 10px 14px;
  cursor: pointer;
  color: var(--cyan);
  font-size: 0.85em;
  background: rgba(0,0,0,0.15);
  transition: background 0.2s;
}
.code-block summary:hover { background: rgba(0,0,0,0.3); }
.code-block pre {
  margin: 0;
  padding: 14px;
  max-height: 500px;
  overflow: auto;
  background: #1a1b26;
}
.code-block code { background: none; padding: 0; font-size: 0.75em; line-height: 1.4; }

/* --- kbd --- */
kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 0.85em;
  border-radius: 4px;
  background: var(--card-bg);
  border: 1px solid var(--comment);
  color: var(--yellow);
  font-family: inherit;
}

/* --- ParaView walkthrough (specific) --- */
.quick-start-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 20px 0;
}
@media (min-width: 800px) {
  .quick-start-grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* --- Responsive --- */
@media (max-width: 720px) {
  h1 { font-size: 1.5em; }
  h2 { font-size: 1.2em; }
  .container { padding: 20px 0; }
}