/* ─────────────────────────────────────────────
   THEME VARIABLES
───────────────────────────────────────────── */
:root {
  /* Dark theme (default) */
  --bg-primary:   #060d27;
  --bg-secondary: #04091e;
  --bg-card:      #0d1a3e;
  --bg-card-hover:#162040;
  --bg-nav:       rgba(6, 13, 39, 0.88);

  --text-primary: #ecf9ff;
  --text-muted:   rgba(236, 249, 255, 0.68);
  --text-dim:     rgba(236, 249, 255, 0.38);

  --border:       rgba(63, 123, 255, 0.18);
  --border-hover: rgba(63, 123, 255, 0.50);

  --accent:       #3f7bff;
  --accent-light: #6bb6ff;
  --accent-cyan:  #8ad6ff;
  --accent-dark:  #0062c1;
  --glow:         rgba(63, 123, 255, 0.28);

  --hero-bg: radial-gradient(ellipse 90% 70% at 50% 38%,
               #0d1a4a 0%, #060d27 58%, #04091e 100%);
  --hero-ring-opacity: 0.16;
  --hero-text: #ecf9ff;

  --nav-divider: rgba(63, 123, 255, 0.15);
  --footer-bg:   #04091e;

  --font-heading: 'Fira Sans', sans-serif;
  --font-body:    'Fira Sans', sans-serif;
  --nav-height:   72px;
  --max-width:    1200px;
  --radius:       8px;
  --transition:   0.22s ease;
}

:root[data-theme="light"] {
  --bg-primary:   #f0f5ff;
  --bg-secondary: #ffffff;
  --bg-card:      #ffffff;
  --bg-card-hover:#eaf0ff;
  --bg-nav:       rgba(248, 250, 255, 0.92);

  --text-primary: #08112e;
  --text-muted:   rgba(8, 17, 46, 0.62);
  --text-dim:     rgba(8, 17, 46, 0.36);

  --border:       rgba(8, 17, 46, 0.10);
  --border-hover: rgba(63, 123, 255, 0.50);

  --glow:         rgba(63, 123, 255, 0.12);

  --hero-bg: radial-gradient(ellipse 90% 70% at 50% 38%,
               #d8e6ff 0%, #eef3ff 55%, #f8faff 100%);
  --hero-ring-opacity: 0.28;
  --hero-text: #08112e;

  --accent-light: #1a66cc;
  --accent-cyan:  #0a72b5;

  --nav-divider: rgba(8, 17, 46, 0.08);
  --footer-bg:   #e8eeff;
}

/* ─────────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

img { max-width: 100%; display: block; }
a { color: var(--accent-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-cyan); }
ul { list-style: none; }

/* ─────────────────────────────────────────────
   LAYOUT
───────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}
.section        { padding: 96px 0; }
.section--dark  { background: var(--bg-secondary); }
.section--card  { background: var(--bg-primary); }
.section--tight { padding: 48px 0; }
.text-center    { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }

/* ─────────────────────────────────────────────
   NAVIGATION
───────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--nav-divider);
  z-index: 1000;
  transition: background 0.3s ease;
}
.nav__inner {
  display: flex; align-items: center; gap: 8px;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto; padding: 0 28px;
}
.nav__logo {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0; text-decoration: none; margin-right: auto;
}
.nav__ring { width: 38px; height: 38px; flex-shrink: 0; }
.nav__ring--light { display: none; }
[data-theme="light"] .nav__ring--dark { display: none; }
[data-theme="light"] .nav__ring--light { display: block; }
.page-header__ring--light { display: none; }
[data-theme="light"] .page-header__ring--dark { display: none; }
[data-theme="light"] .page-header__ring--light { display: block; opacity: 0.15; }
.hero__ring-emblem--light { display: none; }
[data-theme="light"] .hero__ring-emblem--dark { display: none; }
[data-theme="light"] .hero__ring-emblem--light { display: block; }
[data-theme="light"] .hero__title { color: #1a3a70; }
.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 500; /* Fira Sans Medium — matches acronym logo */
  color: var(--text-primary);
  letter-spacing: 0.06em;
}

.nav__links {
  display: flex; align-items: center; gap: 2px;
}
.nav__links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 13px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  text-decoration: none;
}
.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
  background: rgba(63, 123, 255, 0.10);
}

.nav__actions { display: flex; align-items: center; gap: 8px; margin-left: 8px; }

.nav__join {
  display: inline-flex; align-items: center;
  background: var(--accent);
  color: #ecf9ff !important;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 8px 18px;
  border-radius: 6px;
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.nav__join:hover {
  background: var(--accent-dark);
  color: #ecf9ff !important;
  transform: translateY(-1px);
}

/* Theme toggle */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-muted);
  transition: border-color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--accent-light);
  background: rgba(63, 123, 255, 0.08);
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
.theme-toggle svg { display: block; transform: translateX(-1px); }
[data-theme="light"] .theme-toggle .icon-sun  { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Mobile hamburger */
.nav__toggle {
  display: none;
  background: none; border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer; padding: 6px;
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   BUTTONS
───────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  border: none;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #ecf9ff;
  box-shadow: 0 0 24px var(--glow);
}
.btn--primary:hover {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  color: #ecf9ff;
  transform: translateY(-2px);
  box-shadow: 0 6px 32px var(--glow);
}
.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}
.btn--outline:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
  background: rgba(63, 123, 255, 0.07);
  transform: translateY(-2px);
}
.btn--lg { padding: 16px 36px; font-size: 0.95rem; }

/* ─────────────────────────────────────────────
   SECTION HEADINGS
───────────────────────────────────────────── */
.label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}
.heading {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.08;
}
.lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 640px;
}

/* ─────────────────────────────────────────────
   PAGE HEADER
───────────────────────────────────────────── */
.page-header {
  padding: 160px 0 80px;
  background: var(--hero-bg);
  text-align: center;
  position: relative; overflow: hidden;
}
.page-header__ring {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 500px; opacity: var(--hero-ring-opacity);
  pointer-events: none;
}
.page-header__content { position: relative; z-index: 2; }
.page-header__title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--hero-text);
  line-height: 1.06;
}
.page-header__count {
  color: var(--accent-cyan);
  font-variant-numeric: tabular-nums;
}
.page-header__lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 16px auto 0;
  line-height: 1.7;
}

/* ─────────────────────────────────────────────
   HERO (homepage)
───────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  background: var(--hero-bg);
  padding-top: var(--nav-height);
}

#hero-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero__content {
  position: relative; z-index: 2;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 72px;
  padding: 60px 0;
}

.hero__text {
  flex: 0 0 46%;
  max-width: 560px;
}

.hero__visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__ring-wrap {
  position: relative;
  width: 100%;
  max-width: 580px;
}
.hero__ring-overlay {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
}
.hero__ring-spinner {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  animation: ringRotateCW 120s linear infinite;
  will-change: transform;
}
.hero__ring-emblem {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 95%;
  height: auto;
}

/* Ring animation classes */
.ring-cw {
  animation: ringRotateCW 60s linear infinite;
  transform-origin: 240px 240px;
  will-change: transform;
}
.ring-ccw {
  animation: ringRotateCCW 45s linear infinite;
  transform-origin: 240px 240px;
  will-change: transform;
}
@keyframes ringRotateCW  { to { transform: rotate(360deg);  } }
@keyframes ringRotateCCW { to { transform: rotate(-360deg); } }

/* Sonar pulse — rings expand outward and fade */
@keyframes sonarPulse {
  0%   { transform: scale(0.02); opacity: 0; }
  8%   { opacity: 0.75; }
  100% { transform: scale(1.15); opacity: 0; }
}
.sonar {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  will-change: transform, opacity;
}
.sonar--1 { animation: sonarPulse 6s ease-out infinite; }
.sonar--2 { animation: sonarPulse 6s ease-out 2s infinite; }
.sonar--3 { animation: sonarPulse 6s ease-out 4s infinite; }

/* Ambient glow pulse */
@keyframes glowPulse {
  0%, 100% { opacity: 0.7; }
  50%       { opacity: 1; }
}
.glow-pulse { animation: glowPulse 3s ease-in-out infinite; }

/* Orbiting dot pulse */
@keyframes dotPulse {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 1; }
}
.dot-pulse    { animation: dotPulse 2.5s ease-in-out infinite; }
.dot-pulse--2 { animation: dotPulse 2.5s ease-in-out 0.6s  infinite; }
.dot-pulse--3 { animation: dotPulse 2.5s ease-in-out 1.2s  infinite; }
.dot-pulse--4 { animation: dotPulse 2.5s ease-in-out 1.8s  infinite; }

/* Dots that both orbit and pulse — two animations on one element */
.ring-ccw.dot-pulse    { animation: ringRotateCCW 45s linear infinite, dotPulse 2.5s ease-in-out infinite; }
.ring-ccw.dot-pulse--2 { animation: ringRotateCCW 45s linear infinite, dotPulse 2.5s ease-in-out 0.6s infinite; }
.ring-ccw.dot-pulse--3 { animation: ringRotateCCW 45s linear infinite, dotPulse 2.5s ease-in-out 1.2s infinite; }
.ring-ccw.dot-pulse--4 { animation: ringRotateCCW 45s linear infinite, dotPulse 2.5s ease-in-out 1.8s infinite; }

/* Light mode — darken the SVG ring dashes and orbiting dots */
[data-theme="light"] .hero__ring-overlay .ring-ccw {
  stroke: #1a66cc;
}
[data-theme="light"] .hero__ring-overlay .dot-pulse,
[data-theme="light"] .hero__ring-overlay .dot-pulse--2,
[data-theme="light"] .hero__ring-overlay .dot-pulse--3,
[data-theme="light"] .hero__ring-overlay .dot-pulse--4 {
  fill: #1a66cc;
}

@media (max-width: 767px) {
  .hero__visual { display: none; }
  #hero-canvas { display: none; }
  .page-header__ring { display: none !important; }
  .theme-toggle svg { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .ring-cw, .ring-ccw, .hero__ring-spinner, .sonar--1, .sonar--2, .sonar--3, .glow-pulse,
  .dot-pulse, .dot-pulse--2, .dot-pulse--3, .dot-pulse--4,
  .ring-ccw.dot-pulse, .ring-ccw.dot-pulse--2, .ring-ccw.dot-pulse--3, .ring-ccw.dot-pulse--4 { animation: none; }
}

.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  border: 1px solid rgba(138, 214, 255, 0.28);
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 32px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.4vw, 3.3rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--hero-text);
  letter-spacing: 0.01em;
  margin-bottom: 28px;
}

.hero__name {
  background: linear-gradient(130deg, var(--accent-cyan) 0%, var(--accent-light) 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__body {
  font-size: clamp(0.95rem, 1.4vw, 1.08rem);
  color: var(--text-muted);
  margin: 0 0 40px;
  line-height: 1.78;
  max-width: 520px;
}

.hero__ctas {
  display: flex; gap: 14px; flex-wrap: wrap;
}

/* ─────────────────────────────────────────────
   PILLARS (3-up)
───────────────────────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.pillar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: all var(--transition);
}
.pillar:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px var(--glow);
}
.pillar__icon  { font-size: 2.2rem; margin-bottom: 18px; }
.pillar__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.pillar__body  { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }

/* ─────────────────────────────────────────────
   MEMBER TAGS (homepage preview)
───────────────────────────────────────────── */
.member-tags {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 32px;
}
.member-tag {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 20px;
  transition: all var(--transition);
  white-space: nowrap;
}
.member-tag:hover {
  color: var(--accent-cyan);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

/* ─────────────────────────────────────────────
   MEMBERS PAGE
───────────────────────────────────────────── */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin-top: 32px;
}
.member-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: all var(--transition);
}
.member-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--glow);
}
.member-card__name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
}
.member-card__type {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-top: 5px;
}

.category-heading {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
  margin-top: 48px;
  display: flex; align-items: center; gap: 10px;
}
.category-heading:first-of-type { margin-top: 32px; }
.category-heading::before {
  content: '';
  display: inline-block;
  width: 4px; height: 20px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent));
  border-radius: 2px;
}

/* ─────────────────────────────────────────────
   MISSION PAGE
───────────────────────────────────────────── */
.mission-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 36px 40px;
  margin-bottom: 20px;
  transition: border-color var(--transition);
}
.mission-block:hover { border-left-color: var(--accent-cyan); }
.mission-block__eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}
.mission-block__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.mission-block__text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.policy-areas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.policy-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
}
.policy-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--glow);
}
.policy-card__num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--border-hover);
  line-height: 1;
  margin-bottom: 10px;
}
.policy-card__title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.policy-card__body {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: all var(--transition);
}
.cat-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.cat-card__icon  { font-size: 1.8rem; margin-bottom: 12px; }
.cat-card__title { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.cat-card__body  { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ─────────────────────────────────────────────
   EVENTS PAGE
───────────────────────────────────────────── */
.event-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: flex; gap: 28px; align-items: flex-start;
  margin-bottom: 16px;
  transition: all var(--transition);
}
.event-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.event-card--past { opacity: 0.8; }
.event-card--past:hover { opacity: 1; }

.event-date {
  text-align: center; flex-shrink: 0;
  background: rgba(63, 123, 255, 0.10);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  min-width: 68px;
}
.event-date__month {
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--accent-cyan);
}
.event-date__day {
  font-family: var(--font-heading);
  font-size: 2rem; font-weight: 800;
  color: var(--text-primary); line-height: 1.1;
}
.event-date__year {
  font-size: 0.72rem; color: var(--text-dim); margin-top: 2px;
}
.event-body { flex: 1; }
.event-tag {
  display: inline-block;
  font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  padding: 3px 10px; border-radius: 12px;
  margin-bottom: 8px;
}
.event-tag--past     { background: rgba(138,214,255,0.12); color: var(--accent-cyan); }
.event-tag--upcoming { background: rgba(63,123,255,0.15);  color: var(--accent-light); }
.event-card__title  { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.event-card__meta   { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 10px; }
.event-card__body   { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }
.event-card__topics {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px;
}
.topic-chip {
  font-size: 0.72rem; font-weight: 600;
  padding: 3px 10px; border-radius: 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────
   CONTACT PAGE
───────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
.contact-row {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 14px;
}
.contact-row__icon { font-size: 1rem; color: var(--accent-cyan); flex-shrink: 0; margin-top: 2px; }
.contact-row__text { font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }
.contact-row__text strong { color: var(--text-primary); display: block; margin-bottom: 1px; }

/* ─────────────────────────────────────────────
   JOIN BANNER
───────────────────────────────────────────── */
.join-banner {
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 96px 0;
  position: relative; overflow: hidden;
}
.join-banner::before {
  content: '';
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse at 50% 100%, var(--glow) 0%, transparent 70%);
  pointer-events: none;
}
.join-banner__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.join-banner__lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* ─────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────── */
.footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  transition: background 0.3s ease;
}
.footer__inner {
  display: flex; gap: 56px;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer__brand { flex: 0 1 280px; }
.footer__brand-logo {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px; text-decoration: none;
}
.footer__brand-ring { width: 36px; height: 36px; }
.footer__brand-ring--light { display: none; }
[data-theme="light"] .footer__brand-ring--dark { display: none; }
[data-theme="light"] .footer__brand-ring--light { display: block; }
.footer__brand-name {
  font-family: var(--font-heading);
  font-size: 1.3rem; font-weight: 500; /* Fira Sans Medium */
  color: var(--text-primary); letter-spacing: 0.06em;
}
.footer__brand p { font-size: 0.84rem; color: var(--text-dim); line-height: 1.65; }
.footer__nav-group { flex: 0 0 auto; }
.footer__nav-group h4 {
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 14px;
}
.footer__nav-group ul { display: flex; flex-direction: column; gap: 8px; }
.footer__nav-group a {
  font-size: 0.87rem; color: var(--text-muted); text-decoration: none;
  transition: color var(--transition);
}
.footer__nav-group a:hover { color: var(--accent-cyan); }
.footer__bottom {
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer__copy,
.footer__privacy { font-size: 0.78rem; color: var(--text-dim); }
.footer__privacy { text-decoration: none; }
.footer__privacy:hover { color: var(--text-muted); }
.footer__doi {
  font-size: 0.75rem; color: var(--text-dim);
  text-align: right;
}

/* ─────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────── */
@media (max-width: 960px) {
  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height); left: 0; right: 0;
    background: var(--bg-nav);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 20px 20px;
    gap: 4px;
    z-index: 999;
  }
  .nav__links.open { display: flex; }
  .nav__links.open a { padding: 10px 14px; font-size: 0.95rem; }
  .nav__join { display: none; }
  .nav__toggle { display: block; }

  .pillars { grid-template-columns: 1fr; gap: 16px; }
  .policy-areas { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero__content { flex-direction: column; gap: 48px; text-align: center; }
  .hero__text { flex: none; max-width: 100%; }
  .hero__body { max-width: 100%; }
  .hero__ctas { justify-content: center; }
  .hero__visual { max-width: 320px; }
  .hero__title { font-size: clamp(2rem, 6vw, 3.2rem); }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .page-header { padding: 120px 0 56px; }
  .hero__ctas { flex-direction: column; align-items: center; justify-content: center; }
  .hero__ctas .btn { width: 100%; max-width: 280px; justify-content: center; }
  .hero__visual { max-width: 240px; }
  .event-card { flex-direction: column; gap: 16px; }
  .mission-block { padding: 24px 22px; }
  .footer__inner { flex-direction: column; gap: 28px; }
  .footer__bottom { flex-direction: column; text-align: center; }
}