/* =========================================
   K. Jayatilake Digital Archive — styles.css
   Clean, museum/library aesthetic
   ========================================= */

/* ----- CSS Reset (light) ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html:focus-within {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
}
button {
  font: inherit;
}

/* ----- Theme tokens ----- */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f6f4ef;
  --text: #121212;
  --muted: #4b4b4b;
  --muted-2: #6a6a6a;
  --line: rgba(0, 0, 0, 0.10);

  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-soft: 0 6px 18px rgba(0, 0, 0, 0.06);

  --radius: 16px;
  --radius-sm: 12px;

  --container: 1100px;

  --font: ui-serif, Georgia, "Times New Roman", Times, serif;
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  --h1: clamp(2rem, 2.2vw + 1.25rem, 3.2rem);
  --h2: clamp(1.5rem, 1vw + 1.1rem, 2.2rem);
  --h3: 1.1rem;

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.25rem;
  --space-5: 1.75rem;
  --space-6: 2.25rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --focus: 2px solid rgba(0, 0, 0, 0.55);
}

/* ----- Base ----- */
body {
  background: radial-gradient(1200px 600px at 10% 0%, rgba(0, 0, 0, 0.04), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(0, 0, 0, 0.03), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin-inline: auto;
}

.section {
  padding: var(--space-8) 0;
}

.section-header {
  max-width: 70ch;
  margin-bottom: var(--space-6);
}
.section-header h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--h2);
  letter-spacing: -0.02em;
}
.section-header p {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 1rem;
}

/* ----- Accessibility ----- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  box-shadow: var(--shadow-soft);
  z-index: 9999;
}
.skip-link:focus {
  left: 12px;
  outline: var(--focus);
}

/* ----- Header / Nav ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 247, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0.9rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  min-width: 220px;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}
.brand-title {
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-subtitle {
  font-family: var(--font-sans);
  color: var(--muted-2);
  font-size: 0.9rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 0.55rem 0.8rem;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}
.nav-toggle:focus {
  outline: var(--focus);
  outline-offset: 2px;
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
}
.nav-list a {
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: rgba(0, 0, 0, 0.80);
  padding: 0.4rem 0.55rem;
  border-radius: 10px;
}
.nav-list a:hover {
  background: rgba(0, 0, 0, 0.05);
}
.nav-list a:focus {
  outline: var(--focus);
  outline-offset: 2px;
}

/* ----- Hero ----- */
.hero {
  padding-top: calc(var(--space-8) - 1rem);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-7);
  align-items: start;
}
.badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.78);
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--line);
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  margin: 0 0 var(--space-3);
}

.hero h1 {
  margin: 0 0 var(--space-3);
  font-size: var(--h1);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.lead {
  margin: 0 0 var(--space-4);
  font-family: var(--font-sans);
  color: var(--muted);
  font-size: 1.05rem;
}

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0 0 var(--space-5);
}
.chip {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
}

.cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.8rem 1.05rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
  will-change: transform;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}
.btn:focus {
  outline: var(--focus);
  outline-offset: 2px;
}
.btn.primary {
  background: #111;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.10);
}
.btn.primary:hover {
  background: #000;
}
.btn.secondary {
  background: var(--surface);
  color: var(--text);
}

.hero-figure {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}
.hero-figure figcaption {
  font-family: var(--font-sans);
  color: var(--muted-2);
  font-size: 0.92rem;
  padding: var(--space-3);
  border-top: 1px solid var(--line);
}

/* ----- About grid ----- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-6);
  align-items: start;
}
.about-media {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.about-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ----- Cards ----- */
.cards {
  display: grid;
  gap: var(--space-3);
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.05);
}
.card h3 {
  margin: 0 0 0.35rem;
  font-size: var(--h3);
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--muted);
}

/* ----- Biography grid ----- */
.bio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.dl {
  margin: 0;
}
.dl div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}
.dl div:last-child {
  border-bottom: none;
}
dt {
  font-family: var(--font-sans);
  color: var(--muted-2);
  font-weight: 600;
  font-size: 0.95rem;
}
dd {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
}

/* ----- Timeline ----- */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.timeline-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: var(--space-4);
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-soft);
}

.timeline-year {
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: 0.02em;
  font-size: 0.95rem;
  color: rgba(0, 0, 0, 0.75);
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.7rem;
  width: fit-content;
}

.timeline-content h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}
.timeline-content p {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--muted);
}

.note {
  margin-top: var(--space-4);
  font-family: var(--font-sans);
  color: var(--muted-2);
  font-size: 0.95rem;
}

/* ----- Works (filters + grid) ----- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0 0 var(--space-4);
}
.filter {
  border: 1px solid var(--line);
  background: var(--surface);
  color: rgba(0, 0, 0, 0.80);
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.92rem;
}
.filter:hover {
  background: rgba(0, 0, 0, 0.05);
}
.filter:focus {
  outline: var(--focus);
  outline-offset: 2px;
}
.filter.active {
  background: #111;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.10);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

/* If your app.js renders cards into #worksGrid, this styles them */
.grid .card {
  display: grid;
  gap: 0.6rem;
}
.grid .card .meta {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  font-family: var(--font-sans);
  color: var(--muted-2);
  font-size: 0.9rem;
}
.grid .card .small {
  font-family: var(--font-sans);
  color: var(--muted);
  font-size: 0.98rem;
}

/* ----- Research ----- */
.research-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-5);
  align-items: start;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-content: start;
}
.tag {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
}

/* ----- Gallery ----- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}
.gallery-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  margin: 0;
}
.gallery-item img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.gallery-item figcaption {
  padding: 0.8rem 1rem;
  font-family: var(--font-sans);
  color: var(--muted-2);
  font-size: 0.92rem;
  border-top: 1px solid var(--line);
}

/* ----- Contact ----- */
.contact-card .dl div {
  grid-template-columns: 90px 1fr;
}

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.60);
}
.footer-inner {
  padding: var(--space-6) 0 var(--space-4);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-6);
  align-items: start;
}
.footer-title {
  font-family: var(--font);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}
.footer-text {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--muted);
}
.footer-nav {
  display: grid;
  gap: 0.5rem;
  justify-content: end;
}
.footer-nav a {
  font-family: var(--font-sans);
  color: rgba(0, 0, 0, 0.75);
  text-decoration: none;
  width: fit-content;
  padding: 0.3rem 0.4rem;
  border-radius: 10px;
}
.footer-nav a:hover {
  background: rgba(0, 0, 0, 0.05);
}
.footer-bottom {
  grid-column: 1 / -1;
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}
.footer-bottom small {
  font-family: var(--font-sans);
  color: var(--muted-2);
}

/* ----- Responsive ----- */
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .bio-grid {
    grid-template-columns: 1fr;
  }
  .research-grid {
    grid-template-columns: 1fr;
  }
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    justify-content: start;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Mobile menu: JS can toggle a class on #navMenu like .open */
  .nav-list {
    position: absolute;
    right: 1rem;
    top: 72px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.75rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
  }
  .nav-list.open {
    display: flex;
  }
  .nav-list a {
    padding: 0.65rem 0.75rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }
}

/* ----- Reduced motion ----- */
@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }
  .btn {
    transition: none;
  }
  .btn:hover {
    transform: none;
  }
}