/* ==========================================================
   AVIKA Research Foundation — Stylesheet
   ========================================================== */

:root {
  --color-ink: #16302c;
  --color-primary: #0f4d44;
  --color-primary-dark: #0a332c;
  --color-primary-light: #e6efec;
  --color-accent: #b98a3e;
  --color-accent-light: #f4e9d8;
  --color-bg: #fbfaf7;
  --color-surface: #ffffff;
  --color-border: #e2e0d8;
  --color-text: #2c332f;
  --color-text-muted: #5c655f;
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1100px;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(15, 77, 68, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-primary-dark);
  line-height: 1.25;
  margin: 0 0 0.5em;
}

h1 { font-size: 2.6rem; }
h2 { font-size: 1.9rem; }
h3 { font-size: 1.3rem; }

p { margin: 0 0 1em; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

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

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-primary-dark);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.brand small {
  display: block;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

nav.main-nav {
  display: flex;
  gap: 4px;
}

nav.main-nav a {
  color: var(--color-text);
  font-size: 0.94rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  text-decoration: none;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
}

@media (max-width: 780px) {
  nav.main-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 8px 24px 16px;
  }
  nav.main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-wrap { flex-wrap: wrap; }
}

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

.hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 80px 24px;
}

.hero .container { max-width: var(--max-width); }

.hero h1 { color: #fff; max-width: 700px; }

.hero p.lede {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.88);
  max-width: 600px;
}

.hero .meta {
  margin-top: 10px;
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
}

.button-row {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { background: #a3792f; text-decoration: none; }

.btn-outline {
  border-color: rgba(255,255,255,0.6);
  color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,0.12); text-decoration: none; }

.btn-outline-dark {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-outline-dark:hover { background: var(--color-primary-light); text-decoration: none; }

/* ---------- Page header (non-home) ---------- */

.page-header {
  background: var(--color-primary-light);
  padding: 56px 24px 40px;
  border-bottom: 1px solid var(--color-border);
}
.page-header h1 { margin-bottom: 8px; }
.page-header p { color: var(--color-text-muted); max-width: 650px; margin: 0; }

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

section { padding: 64px 24px; }
section.tight { padding: 40px 24px; }
.section-alt { background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }

.section-intro { max-width: 680px; margin-bottom: 36px; }
.section-intro p { color: var(--color-text-muted); }

/* ---------- Stats ---------- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  color: var(--color-accent);
  font-weight: 700;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

@media (max-width: 780px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Cards / grids ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

.card h3 { margin-bottom: 10px; }
.card p { color: var(--color-text-muted); margin: 0; font-size: 0.95rem; }

@media (max-width: 780px) {
  .card-grid { grid-template-columns: 1fr; }
}

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

.pub-toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.pub-toolbar input, .pub-toolbar select {
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  background: var(--color-surface);
}

.pub-list { display: flex; flex-direction: column; gap: 14px; }

.pub-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: 8px;
  padding: 18px 20px;
}

.pub-year {
  display: inline-block;
  font-family: var(--font-serif);
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.pub-title { font-weight: 600; margin-bottom: 4px; color: var(--color-ink); }
.pub-meta { font-size: 0.88rem; color: var(--color-text-muted); }

.note-box {
  background: var(--color-accent-light);
  border: 1px solid #e7d4ac;
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 0.9rem;
  color: #6b5320;
  margin-top: 20px;
}

/* ---------- Timeline ---------- */

.timeline { display: flex; flex-direction: column; gap: 22px; }

.timeline-item {
  border-left: 3px solid var(--color-primary);
  padding-left: 20px;
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-accent);
}

.timeline-period {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  font-family: var(--font-serif);
}

/* ---------- Director / profile ---------- */

.profile-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 780px) {
  .profile-layout { grid-template-columns: 1fr; }
}

.profile-photo {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-primary-light);
}

/* ---------- Gallery ---------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.gallery-item {
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 780px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

@media (max-width: 780px) {
  .contact-grid { grid-template-columns: 1fr; }
}

.contact-detail {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
}

.contact-detail strong { display: block; color: var(--color-primary-dark); }

form.contact-form { display: flex; flex-direction: column; gap: 14px; }

form.contact-form label { font-size: 0.88rem; font-weight: 600; color: var(--color-primary-dark); }

form.contact-form input,
form.contact-form textarea {
  padding: 11px 13px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  width: 100%;
}

form.contact-form textarea { min-height: 130px; resize: vertical; }

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

footer.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.75);
  padding: 40px 24px;
  font-size: 0.88rem;
}

footer.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

footer.site-footer a { color: #fff; }

/* ---------- Utility ---------- */

.placeholder-note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: 8px;
}

.list-plain { padding-left: 20px; color: var(--color-text-muted); }
.list-plain li { margin-bottom: 8px; }