/* ============================================
   PIMS CRG — shared stylesheet
   Google Sites–style layout: colored banner header,
   horizontal tab nav, rounded Material-style cards.
   ============================================ */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #202124;
  --color-text-muted: #5f6368;
  --color-border: #e0e0e0;
  --color-primary: #1a73e8;
  --color-primary-dark: #174ea6;
  --color-banner: #1a56b8;
  --color-banner-dark: #123c82;
  --max-width: 980px;
  --radius: 10px;
  --font-sans: "Google Sans", "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

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

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;
}

h1, h2, h3 {
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* ---------- Tab navigation ---------- */

.site-tabs {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-tabs .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-left {
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 14px 0;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 4px 0;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.main-nav a {
  display: inline-block;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 16px 14px;
  border-bottom: 3px solid transparent;
}
.main-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}
.main-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.brand-inline {
  flex-shrink: 0;
  color: var(--color-text);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand-inline:hover {
  color: var(--color-primary);
  text-decoration: none;
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    width: 100%;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav a { padding: 12px 4px; border-bottom: 1px solid var(--color-border); border-left: 3px solid transparent; }
  .main-nav a.active { border-bottom-color: var(--color-border); border-left-color: var(--color-primary); }
  .site-tabs .container { flex-wrap: wrap; }
  .nav-left { width: 100%; }
  .brand-inline { order: -1; padding: 14px 0; }
}

/* ---------- Hero banner (welcome page) ---------- */

.hero-banner {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: flex-end;
  background:
    linear-gradient(0deg, rgba(10, 20, 45, 0.65), rgba(10, 20, 45, 0.15)),
    url("../images/banner-geometry.svg") center / cover no-repeat;
  border-bottom: 1px solid var(--color-border);
}
.hero-banner .container { padding-top: 48px; padding-bottom: 32px; }
.hero-banner .hero-eyebrow {
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  opacity: 0.9;
}
.hero-banner h1 {
  color: #fff;
  font-size: 2.4rem;
  margin: 0;
  max-width: 760px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

/* ---------- Intro / description block ---------- */

.intro-block { padding: 44px 0; }
.intro-block p {
  color: var(--color-text);
  font-size: 1.08rem;
  margin: 0;
}

/* ---------- News ---------- */

.news-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}
.news-item:last-child { border-bottom: none; }
.news-date {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 4px;
}
.news-title { margin: 0 0 4px; font-size: 1.05rem; font-weight: 700; }
.news-item p.muted { margin: 0; }

/* ---------- Page hero (inner pages) ---------- */

.page-hero {
  padding: 44px 0 34px;
  background:
    linear-gradient(0deg, rgba(10, 20, 45, 0.72), rgba(10, 20, 45, 0.35)),
    url("../images/banner-geometry.svg") center / cover no-repeat;
  border-bottom: 1px solid var(--color-border);
}
.page-hero .hero-eyebrow {
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  opacity: 0.9;
}
.page-hero h1 {
  color: #fff;
  font-size: 2rem;
  margin: 0 0 10px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}
.page-hero p { color: rgba(255, 255, 255, 0.85); max-width: 640px; margin: 0; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 11px 24px;
  border-radius: 24px;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 1px 3px rgba(26, 115, 232, 0.4);
}
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-outline {
  background: #fff;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-outline:hover { background: var(--color-bg-alt); }

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

main { padding-bottom: 20px; }

section { padding: 56px 0; }
section.alt { background: var(--color-bg-alt); }

.section-heading { margin-bottom: 32px; max-width: 680px; }
.section-heading h2 { font-size: 1.6rem; margin: 0 0 10px; }
.section-heading p { color: var(--color-text-muted); margin: 0; }
.section-heading p + p { margin-top: 20px; }
.section-heading.wide { max-width: none; }

/* ---------- Plain text blocks ---------- */

.block-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.block p {
  margin: 0;
  color: var(--color-text);
}

/* ---------- Grid / Cards ---------- */

.grid {
  display: grid;
  gap: 20px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 720px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}
.card .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background: #e8f0fe;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.card h3 { margin: 0 0 8px; font-size: 1.08rem; }
.card p { margin: 0; color: var(--color-text-muted); font-size: 0.94rem; }

/* ---------- People ---------- */

.institution-group { margin-bottom: 44px; }
.institution-group:last-child { margin-bottom: 0; }
.institution-group h3 {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin: 0 0 18px;
}

.person-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}
.person-photo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.65rem;
  text-align: center;
  overflow: hidden;
}
.person-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.person-name { font-weight: 700; margin: 0; font-size: 1.02rem; }
.person-role { color: var(--color-text-muted); font-size: 0.9rem; margin: 3px 0 6px; }
.person-bio { color: var(--color-text-muted); font-size: 0.9rem; margin: 0; }

.group-photo {
  width: 100%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  aspect-ratio: 16 / 7;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.group-photo-caption {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-style: italic;
  margin: 0 0 28px;
}

/* ---------- TBA placeholder ---------- */

.tba {
  text-align: center;
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: 60px 0;
  margin: 0;
}

/* ---------- Events / Seminars ---------- */

.event-item {
  display: flex;
  gap: 20px;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
  margin-bottom: 16px;
}
.event-item:last-child { margin-bottom: 0; }

.event-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 72px;
  background: var(--color-bg-alt);
  border-radius: 8px;
  padding: 10px 0;
}
.event-date .day { font-size: 1.4rem; font-weight: 700; line-height: 1; }
.event-date .month { font-size: 0.8rem; color: var(--color-text-muted); text-transform: uppercase; }
.event-date .year { font-size: 0.75rem; color: var(--color-text-muted); }

.event-title { margin: 0 0 4px; font-size: 1.08rem; font-weight: 700; }
.event-meta { color: var(--color-text-muted); font-size: 0.9rem; margin: 0 0 6px; }
.event-status {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-primary);
  background: #e8f0fe;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.event-status.past { color: var(--color-text-muted); background: var(--color-bg-alt); }

.seminar-item {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
  margin-bottom: 16px;
}
.seminar-item:last-child { margin-bottom: 0; }

.pub-links a {
  font-size: 0.88rem;
  margin-right: 16px;
  font-weight: 500;
}

.abstract-toggle { margin-top: 10px; }
.abstract-toggle summary {
  cursor: pointer;
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.9rem;
  list-style: none;
}
.abstract-toggle summary::-webkit-details-marker { display: none; }
.abstract-toggle summary::before {
  content: "▸ ";
  font-size: 0.75em;
}
.abstract-toggle[open] summary::before { content: "▾ "; }
.abstract-toggle p { margin: 10px 0 0; }

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

.contact-block {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-row { display: flex; gap: 12px; flex-wrap: wrap; }
.contact-label { font-weight: 700; min-width: 140px; flex-shrink: 0; }
.contact-value { color: var(--color-text-muted); }

form.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}
.form-row label {
  display: block;
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 6px;
}
.form-row input,
.form-row textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}
.form-row textarea { resize: vertical; min-height: 110px; }

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

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.site-footer a { color: var(--color-text-muted); }

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

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