/* LCARS-inspired academic site — original design language */

:root {
  --bg: #070b14;
  --bg-soft: #0b1220;
  --panel: #0f1828;
  --panel-soft: #132036;
  --border: #1f2d48;
  --ink: #e6eef9;
  --ink-dim: #9bb0c9;
  --ink-mute: #627697;
  --accent: #7dd3fc;         /* cyan primary */
  --accent-2: #fbbf24;       /* amber */
  --accent-3: #c084fc;       /* violet */
  --accent-4: #a3e635;       /* green data */
  --accent-5: #fb7185;       /* rose alerts */
  --glow: 0 0 24px color-mix(in oklch, var(--accent) 45%, transparent);
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --sans: "Inter", system-ui, sans-serif;
  --display: "Orbitron", "JetBrains Mono", monospace;
  --font-scale: 1;

  /* Density — tweakable */
  --pad: 28px;
  --gap: 24px;
  --radius-lg: 28px;
  --radius-xl: 56px;
  --radius-pill: 999px;

  /* Sci-fi intensity — tweakable (0..1) */
  --scifi: 0.6;
  --scan-opacity: calc(var(--scifi) * 0.09);
  --grid-opacity: calc(var(--scifi) * 0.22);
  --glow-strength: calc(var(--scifi) * 1);
}

[data-theme="light"] {
  --bg: #efe9dc;
  --bg-soft: #e5ddc9;
  --panel: #f6f1e4;
  --panel-soft: #ece5d1;
  --border: #cfc3a6;
  --ink: #141a26;
  --ink-dim: #4a5265;
  --ink-mute: #7e8698;
  --accent: #0369a1;
  --accent-2: #c2410c;
  --accent-3: #7e22ce;
  --accent-4: #65a30d;
  --accent-5: #be123c;
  --scan-opacity: calc(var(--scifi) * 0.05);
  --grid-opacity: calc(var(--scifi) * 0.14);
}

[data-density="compact"] {
  --pad: 18px;
  --gap: 14px;
  --radius-lg: 18px;
  --radius-xl: 36px;
}

[data-density="spacious"] {
  --pad: 40px;
  --gap: 36px;
  --radius-lg: 36px;
  --radius-xl: 72px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
body {
  font-family: var(--sans);
  font-size: calc(15px * var(--font-scale, 1));
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Scanlines overlay */
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    color-mix(in oklch, var(--ink) 100%, transparent) 0 1px,
    transparent 1px 3px
  );
  opacity: var(--scan-opacity);
  z-index: 999;
  mix-blend-mode: overlay;
}

::selection { background: var(--accent); color: var(--bg); }

/* Typography */
.mono { font-family: var(--mono); letter-spacing: 0.02em; }
.label {
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.code-chip {
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.15em;
  color: var(--accent);
  padding: 3px 10px;
  border: 1px solid color-mix(in oklch, var(--accent) 40%, transparent);
  border-radius: var(--radius-pill);
  background: color-mix(in oklch, var(--accent) 10%, transparent);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-weight: 700; letter-spacing: 0.02em; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.edu-link:hover { color: var(--accent) !important; }

/* Layout shell */
.shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
}

/* LCARS-style section header: color bar + pill + title */
.sec-head {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  align-items: end;
  gap: 18px;
  padding: 36px 0 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
section#about .sec-head { padding-top: 12px; }
.sec-head .bar {
  height: 42px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--accent), color-mix(in oklch, var(--accent) 40%, transparent));
  box-shadow: 0 0 calc(18px * var(--glow-strength)) color-mix(in oklch, var(--accent) 40%, transparent);
}
.sec-head .bar.amber { background: linear-gradient(90deg, var(--accent-2), color-mix(in oklch, var(--accent-2) 40%, transparent)); box-shadow: 0 0 calc(18px * var(--glow-strength)) color-mix(in oklch, var(--accent-2) 40%, transparent); }
.sec-head .bar.violet { background: linear-gradient(90deg, var(--accent-3), color-mix(in oklch, var(--accent-3) 40%, transparent)); box-shadow: 0 0 calc(18px * var(--glow-strength)) color-mix(in oklch, var(--accent-3) 40%, transparent); }
.sec-head .bar.green { background: linear-gradient(90deg, var(--accent-4), color-mix(in oklch, var(--accent-4) 40%, transparent)); box-shadow: 0 0 calc(18px * var(--glow-strength)) color-mix(in oklch, var(--accent-4) 40%, transparent); }
.sec-head h2 {
  font-family: var(--display);
  font-size: calc(32px * var(--font-scale, 1));
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.sec-head .kicker {
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.28em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}
.sec-head .meta {
  font-family: var(--mono);
  color: var(--ink-mute);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: right;
}

/* Card / panel */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--pad);
}

/* Pill button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-family: var(--mono);
  font-size: calc(12px * var(--font-scale, 1));
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
  box-shadow: 0 0 calc(12px * var(--glow-strength)) color-mix(in oklch, var(--accent) 30%, transparent);
}
.btn-solid {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-solid:hover {
  background: color-mix(in oklch, var(--accent) 85%, white);
  color: var(--bg);
  border-color: var(--accent);
}

/* Tag chip */
.tag {
  font-family: var(--mono);
  font-size: calc(10px * var(--font-scale, 1));
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  color: var(--ink-dim);
  white-space: nowrap;
}
.tag.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }

/* Nav (sticky top) */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px) saturate(160%);
  background: color-mix(in oklch, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: calc(13px * var(--font-scale, 1));
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
}
.nav .brand-mark {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 calc(10px * var(--glow-strength)) var(--accent);
}
.nav-links {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}
.nav-links a {
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  text-decoration: none;
}
.nav-links a:hover { color: var(--accent); background: var(--panel-soft); text-decoration: none; }

/* Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
/* allow grid/flex children to shrink so larger text reflows instead of overflowing */
.grid-2 > *, .grid-3 > *, .grid-4 > * { min-width: 0; }
@media (max-width: 1000px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .sec-head { grid-template-columns: 80px 1fr; }
  .sec-head .meta { display: none; }
  .shell { padding: 0 18px; }
}

/* Tweak panel — controls never scale with the content font-size tweak */
.tweaks-panel, .tweaks-chip { --font-scale: 1; }
.tweaks-chip {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 201;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-pill);
  padding: 9px 16px;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(0,0,0,0.35);
  transition: filter 0.15s ease, transform 0.15s ease;
}
.tweaks-chip:hover { filter: brightness(1.08); transform: translateY(-1px); }
.tweaks-panel {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 320px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  z-index: 200;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: none;
}
.tweaks-panel.open { display: block; }
.tweaks-panel h4 {
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 14px;
}
.tweak-row { margin-bottom: 14px; }
.tweak-row label {
  font-family: var(--mono);
  font-size: calc(10px * var(--font-scale, 1));
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
}
.tweak-row input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}
.tweak-row .seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}
.tweak-row .seg button {
  font-family: var(--mono);
  font-size: calc(10px * var(--font-scale, 1));
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--ink-dim);
  padding: 8px;
  border-radius: var(--radius-pill);
  cursor: pointer;
}
.tweak-row .seg button.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.tweak-row .swatches {
  display: flex;
  gap: 6px;
}
.tweak-row .swatches button {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
}
.tweak-row .swatches button.active { border-color: var(--ink); }

/* Publications */
.pub-row {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.pub-row:last-child { border-bottom: none; }
.pub-year {
  font-family: var(--mono);
  font-size: calc(22px * var(--font-scale, 1));
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
  line-height: 1;
  padding-top: 2px;
}
.pub-title { font-weight: 500; font-size: calc(15px * var(--font-scale, 1)); color: var(--ink); margin-bottom: 3px; line-height: 1.35; }
.pub-authors { font-size: calc(13px * var(--font-scale, 1)); color: var(--ink-dim); margin-bottom: 3px; }
.pub-venue { font-size: calc(12px * var(--font-scale, 1)); color: var(--ink-mute); font-style: italic; margin-bottom: 6px; }
.pub-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.pub-search-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
  align-items: center;
}
.pub-search-bar input {
  flex: 1;
  min-width: 200px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: calc(12px * var(--font-scale, 1));
  letter-spacing: 0.1em;
}
.pub-search-bar input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 20%, transparent); }

/* Hero grid canvas */
.hero-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.hero-grid-svg {
  position: absolute;
  inset: 0;
  opacity: var(--grid-opacity);
  width: 100%; height: 100%;
}

/* Scroll anchor offset */
section[id] { scroll-margin-top: 72px; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 40px 0 60px;
  color: var(--ink-mute);
  font-family: var(--mono);
  font-size: calc(11px * var(--font-scale, 1));
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.footer .shell { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 18px; }