/* ---------- Theme tokens ---------- */
:root {
  --color-bg: #0b0c0e;
  --color-bg-elevated: #131417;
  --color-border: #24262b;
  --color-text: #ededf0;
  --color-text-muted: #9a9ca3;
  --color-accent: #7dd3c0;
  --color-accent-hover: #98e0d0;
  --color-accent-contrast: #06110e;

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --max-width: 760px;
  --radius: 10px;
}

html[data-theme="light"] {
  --color-bg: #fbfaf8;
  --color-bg-elevated: #ffffff;
  --color-border: #e4e1db;
  --color-text: #1c1d1f;
  --color-text-muted: #63666d;
  --color-accent: #17806e;
  --color-accent-hover: #12665a;
  --color-accent-contrast: #f4fbf9;
}

@media (prefers-color-scheme: light) {
  html:not([data-theme]) {
    --color-bg: #fbfaf8;
    --color-bg-elevated: #ffffff;
    --color-border: #e4e1db;
    --color-text: #1c1d1f;
    --color-text-muted: #63666d;
    --color-accent: #17806e;
    --color-accent-hover: #12665a;
    --color-accent-contrast: #f4fbf9;
  }
}

/* ---------- Reset & base ---------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover { color: var(--color-accent-hover); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 0.4em;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--color-text);
}
.logo:hover { color: var(--color-accent); }

.nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav a:hover { color: var(--color-text); }

.theme-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--color-accent); }
.theme-toggle .icon { width: 1.05rem; height: 1.05rem; }
.theme-toggle .icon-moon { display: none; }
html[data-theme="light"] .theme-toggle .icon-sun { display: none; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ---------- Layout ---------- */
main { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

.section { padding: 3.5rem 0; border-top: 1px solid var(--color-border); }
.section:first-of-type { border-top: none; }

.section-title {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.section-body p { color: var(--color-text-muted); }
.section-body em { color: var(--color-text-muted); }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 2.25rem;
  align-items: center;
}

.avatar {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  border: 1px solid var(--color-border);
  grid-column: 1;
  grid-row: 1 / -1;
}

.avatar-light { display: none; }
html[data-theme="light"] .avatar-dark { display: none; }
html[data-theme="light"] .avatar-light { display: block; }

@media (prefers-color-scheme: light) {
  html:not([data-theme]) .avatar-dark { display: none; }
  html:not([data-theme]) .avatar-light { display: block; }
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.tagline {
  color: var(--color-accent);
  font-weight: 500;
  margin: 0 0 1rem;
}

.hero-lede {
  color: var(--color-text-muted);
  max-width: 46ch;
  margin: 0 0 1.75rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

@media (max-width: 620px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }
  .avatar { grid-row: auto; max-width: 220px; }
  .hero-lede { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.btn-primary:hover { background: var(--color-accent-hover); color: var(--color-accent-contrast); }

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

/* ---------- Timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2rem; }

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
}

.timeline-years {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.timeline-content h3 { font-size: 1.1rem; margin-bottom: 0.15em; }
.timeline-org { color: var(--color-accent); font-size: 0.92rem; margin: 0 0 0.4em; font-weight: 500; }
.timeline-content p:not(.timeline-org) { color: var(--color-text-muted); margin: 0; }

@media (max-width: 560px) {
  .timeline-item { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---------- Education ---------- */
.edu-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1.25rem; }

.edu-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
}

.edu-years { color: var(--color-text-muted); font-size: 0.88rem; font-weight: 500; }

.edu-content h3 { font-size: 1.05rem; margin-bottom: 0.15em; }
.edu-org { color: var(--color-accent); font-size: 0.92rem; margin: 0; font-weight: 500; }
.edu-content p:not(.edu-org) { color: var(--color-text-muted); margin: 0.4rem 0 0; }

@media (max-width: 560px) {
  .edu-item { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---------- Publications ---------- */
.pub-list { display: flex; flex-direction: column; gap: 1.75rem; }

.pub h3 { font-size: 1.08rem; margin-bottom: 0.25em; }
.pub-meta { color: var(--color-text-muted); font-size: 0.88rem; margin: 0 0 0.5em; }
.pub-abstract { color: var(--color-text-muted); margin: 0; }

/* ---------- Music ---------- */
.music-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.music-gallery img {
  border-radius: var(--radius);
  aspect-ratio: 4/3;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

.music-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }

@media (max-width: 560px) {
  .music-gallery { grid-template-columns: 1fr; }
}

/* ---------- Contact ---------- */
.contact-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-weight: 500;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  padding: 2.5rem 1.5rem 3rem;
}