/* ---------- Base ---------- */

:root {
  --background: #f7f8fb;
  --surface: #ffffff;
  --surface-alt: #eef2f7;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #dbe2ea;
  --shadow: 0 14px 35px rgba(15, 23, 42, 0.08);
  --radius: 18px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--background);
  line-height: 1.6;
}

a {
  color: var(--primary);
}

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

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

.narrow {
  max-width: 850px;
}

.center {
  text-align: center;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: 1.4rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
}

.nav-menu a:hover {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  font-size: 1.6rem;
  cursor: pointer;
}

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

.hero {
  min-height: 72vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 6rem 0;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 35%),
    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.14), transparent 35%);
}

.hero-content {
  max-width: 820px;
}

.eyebrow,
.section-label {
  margin: 0 0 0.5rem;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.15;
}

h1 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  letter-spacing: -0.045em;
}

h2 {
  margin: 0.3rem 0 1rem;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.03em;
}

.hero-text {
  max-width: 700px;
  margin: 0 auto 2rem;
  font-size: 1.2rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.button {
  display: inline-block;
  padding: 0.82rem 1.2rem;
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease;
}

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

.primary {
  color: white;
  background: var(--primary);
}

.primary:hover {
  background: var(--primary-dark);
}

.secondary {
  color: var(--text);
  background: white;
  border: 1px solid var(--border);
}

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

.section {
  padding: 5.5rem 0;
}

.section.alt {
  background: var(--surface-alt);
}

.info-grid,
.officer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
  margin-top: 2rem;
}

.card,
.officer-card,
.event-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card {
  padding: 1.4rem;
}

.card p,
.officer-card p,
.event-card p {
  color: var(--muted);
}

.event-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.event-card {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1.2rem;
  padding: 1.3rem;
  align-items: center;
}

.event-date {
  text-align: center;
  border-right: 1px solid var(--border);
}

.event-date span {
  display: block;
}

.event-date .month {
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.1em;
}

.event-date .day {
  font-size: 2rem;
  font-weight: 850;
}

.officer-grid {
  grid-template-columns: repeat(4, 1fr);
}

.officer-card {
  padding: 1.5rem;
  text-align: center;
}

.avatar {
  width: 76px;
  height: 76px;
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface-alt);
  color: var(--primary);
  font-size: 1.6rem;
  font-weight: 850;
}

.join-section {
  background:
    linear-gradient(rgba(37, 99, 235, 0.06), rgba(37, 99, 235, 0.06)),
    var(--surface);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}

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

.site-footer {
  padding: 2rem 0;
  color: var(--muted);
  background: #0f172a;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer p {
  margin: 0;
}

/* ---------- Mobile ---------- */

@media (max-width: 800px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    background: white;
    border-bottom: 1px solid var(--border);
  }

  .nav-menu.open {
    display: flex;
  }

  .info-grid,
  .officer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .section {
    padding: 4rem 0;
  }

  .info-grid,
  .officer-grid {
    grid-template-columns: 1fr;
  }

  .event-card {
    grid-template-columns: 64px 1fr;
  }

  .footer-wrap {
    flex-direction: column;
  }
}