:root {
  --navy: #154071;
  --blue: #11a9e0;
  --blue-light: #e8f6fc;
  --gray-dark: #2c2c2c;
  --gray: #5a5a5a;
  --gray-light: #f4f6f8;
  --white: #ffffff;
  --max-width: 1140px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--gray-dark);
  line-height: 1.6;
  background: var(--white);
}

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

h1, h2, h3, h4 {
  color: var(--navy);
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  text-align: center;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

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

a:hover {
  text-decoration: underline;
}

.section-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2.5rem;
  color: var(--gray);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--white);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}

.brand-logo {
  height: 40px;
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  color: var(--navy);
  font-weight: 600;
  font-size: 0.95rem;
}

.main-nav a:hover {
  color: var(--blue);
  text-decoration: none;
}

.btn-nav {
  background: var(--blue);
  color: var(--white) !important;
  padding: 8px 18px;
  border-radius: 6px;
}

.btn-nav:hover {
  background: var(--navy);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 3px;
  background: var(--navy);
  border-radius: 2px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, #1d5a96 100%);
  color: var(--white);
  text-align: center;
  padding: 80px 24px 90px;
}

.hero-logo-panel {
  display: inline-block;
  background: var(--white);
  border-radius: 16px;
  padding: 28px 36px;
  margin: 0 auto 28px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.22);
}

.hero-logo {
  max-width: 420px;
  width: 100%;
  margin: 0 auto;
  display: block;
}

.hero-tagline {
  font-size: 1.3rem;
  max-width: 640px;
  margin: 0 auto 32px;
  color: #e9f3fb;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: background 0.2s, color 0.2s;
}

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

.btn-primary:hover {
  background: var(--white);
  color: var(--navy);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

.btn-secondary:hover {
  background: var(--white);
  color: var(--navy);
  text-decoration: none;
}

.btn-disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Sections */
.section {
  padding: 80px 24px;
}

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

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 2rem;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--gray);
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.stat {
  background: var(--blue-light);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue);
}

.stat-label {
  display: block;
  color: var(--navy);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Platform */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.platform-card {
  background: var(--white);
  border-radius: 10px;
  padding: 28px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  border-top: 4px solid var(--blue);
}

.platform-card p {
  color: var(--gray);
  font-size: 0.95rem;
}

/* Events */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 760px;
  margin: 0 auto;
}

.event-card {
  display: flex;
  gap: 24px;
  background: var(--white);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  align-items: center;
}

.event-date {
  background: var(--navy);
  color: var(--white);
  border-radius: 8px;
  padding: 12px 18px;
  text-align: center;
  min-width: 80px;
}

.event-month {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.event-day {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
}

.event-details p {
  color: var(--gray);
  font-size: 0.9rem;
  margin-top: 2px;
}

/* Get Involved / Form placeholder */
.form-placeholder {
  max-width: 700px;
  margin: 0 auto;
  background: var(--white);
  border: 2px dashed var(--blue);
  border-radius: 10px;
  padding: 36px;
  text-align: center;
}

.form-placeholder pre {
  background: var(--gray-light);
  border-radius: 6px;
  padding: 14px;
  text-align: left;
  overflow-x: auto;
  font-size: 0.82rem;
  margin: 16px 0;
  color: var(--gray-dark);
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: #cfe0f0;
  padding: 56px 24px 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.footer-logo {
  height: 32px;
  margin-bottom: 10px;
  filter: brightness(0) invert(1);
}

.site-footer h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.site-footer a {
  color: #cfe0f0;
}

.site-footer p {
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.footer-bottom {
  text-align: center;
  padding: 18px 0;
  font-size: 0.82rem;
  color: #9fb6cd;
}

/* Responsive */
@media (max-width: 880px) {
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    gap: 16px;
    box-shadow: 0 8px 12px rgba(0,0,0,0.08);
    display: none;
  }
  .main-nav.open {
    display: flex;
  }
  .btn-nav {
    width: 100%;
    text-align: center;
  }
  .platform-grid {
    grid-template-columns: 1fr;
  }
  h2 {
    font-size: 1.6rem;
  }
  .hero {
    padding: 56px 20px 64px;
  }
  .hero-logo-panel {
    padding: 18px 22px;
  }
  .hero-tagline {
    font-size: 1.1rem;
  }
  .event-card {
    flex-direction: column;
    text-align: center;
  }
}