/* =========================================================
   Adith Ramamurti — site styles
   Concept: waves are the connective tissue between
   "research physicist" and "musician" — two frequencies,
   one signal.
   ========================================================= */

:root {
  --bg: #0b0e14;
  --bg-elevated: #12161f;
  --bg-elevated-2: #171c27;
  --line: #232838;
  --text: #eae7e1;
  --text-muted: #9aa1ad;
  --text-faint: #626a78;

  --accent-physics: #59e0c9;
  --accent-physics-dim: #59e0c933;
  --accent-music: #e8a765;
  --accent-music-dim: #e8a76533;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --max-width: 1080px;
  --radius: 6px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.eyebrow.physics { color: var(--accent-physics); }
.eyebrow.music { color: var(--accent-music); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

p { color: var(--text-muted); }

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 14, 20, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
}

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

.nav-links {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius);
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  border-color: var(--line);
}

.nav-links a[aria-current="page"] {
  color: var(--accent-physics);
  border-color: var(--accent-physics-dim);
  background: var(--accent-physics-dim);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.hero-inner {
  position: relative;
  padding: 108px 28px 96px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 68px);
  margin: 14px 0 20px;
}

.hero .tagline {
  max-width: 560px;
  font-size: 19px;
  color: var(--text-muted);
  margin-bottom: 36px;
}

.hero .tagline em {
  color: var(--text);
  font-style: normal;
  border-bottom: 1px solid var(--accent-music-dim);
}

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 13px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn.primary {
  background: var(--accent-physics);
  color: #06110f;
  border-color: var(--accent-physics);
}
.btn.primary:hover { filter: brightness(1.08); }

.btn.secondary {
  color: var(--text);
  border-color: var(--line);
}
.btn.secondary:hover {
  border-color: var(--accent-music);
  color: var(--accent-music);
}

/* ---------- Sections ---------- */

section {
  padding: 84px 0;
  border-bottom: 1px solid var(--line);
}

section:last-of-type { border-bottom: none; }

.section-head {
  margin-bottom: 44px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  margin-top: 10px;
}

/* ---------- Card grid (home preview cards) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 32px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card.physics:hover { border-color: var(--accent-physics-dim); }
.card.music:hover { border-color: var(--accent-music-dim); }

.card h3 {
  font-size: 22px;
  margin-bottom: 10px;
}

.card .go {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 20px;
  display: inline-block;
}

.card.physics .go { color: var(--accent-physics); }
.card.music .go { color: var(--accent-music); }

/* ---------- About / bio ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: start;
}

.about-grid img {
  border-radius: 10px;
  border: 1px solid var(--line);
}

/* ---------- Timeline (employment / education) ---------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.timeline li {
  position: relative;
  padding: 0 0 36px 28px;
}

.timeline li:last-child { padding-bottom: 0; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-physics);
  box-shadow: 0 0 0 4px var(--bg);
}

.timeline .role {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  font-family: var(--font-display);
}

.timeline .org { color: var(--text-muted); margin-top: 2px; }

.timeline .dates {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-faint);
  margin-top: 6px;
  letter-spacing: 0.03em;
}

/* ---------- Publications ---------- */

.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pub;
}

.pub-list li {
  counter-increment: pub;
  position: relative;
  padding: 20px 0 20px 44px;
  border-top: 1px solid var(--line);
}

.pub-list li:first-child { border-top: none; }

.pub-list li::before {
  content: counter(pub, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent-physics);
}

.pub-list .pub-title a {
  color: var(--text);
  font-size: 16px;
  border-bottom: 1px solid transparent;
}
.pub-list .pub-title a:hover {
  border-bottom-color: var(--accent-physics);
}

.pub-list .pub-authors {
  color: var(--text-faint);
  font-size: 14.5px;
  margin-top: 4px;
}

.pub-list .pub-venue {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 8px;
}

.pub-list .pub-venue a { color: var(--accent-physics); }
.pub-list .pub-venue span.sep { margin: 0 8px; color: var(--text-faint); }

/* ---------- Music page ---------- */

.album-block {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
}

.album-art {
  border-radius: 8px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.embed-wrap iframe {
  border-radius: 8px;
  border: 1px solid var(--line);
}

.track-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 14px;
}

.track-list li {
  display: flex;
  gap: 14px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
}
.track-list li:first-child { border-top: none; }
.track-list .n { color: var(--accent-music); width: 20px; }

/* ---------- Footer ---------- */

.site-footer {
  padding: 48px 0 64px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.social-links {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
}

.social-links a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.social-links a:hover { color: var(--accent-physics); }

.copyright {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .nav { flex-direction: column; gap: 14px; align-items: flex-start; }
  .card-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .album-block { grid-template-columns: 1fr; }
  .hero-inner { padding: 72px 24px 64px; }
  .footer-row { flex-direction: column; align-items: flex-start; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card { transition: none; }
}