/* ============================================
   NATIONAL SECURITY HACKATHON - DC 2026
   Design System & Shared Styles
   ============================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #161622;
  --bg-card-hover: #1c1c2e;
  --accent: #00d4ff;
  --accent-dim: #00d4ff33;
  --accent-glow: #00d4ff66;
  --accent-secondary: #7b61ff;
  --accent-warn: #ff6b35;
  --text-primary: #e8e8f0;
  --text-secondary: #8a8a9a;
  --text-muted: #55556a;
  --border: #1e1e30;
  --border-accent: #00d4ff22;
  --font-display: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --grid-line: #ffffff06;
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-display);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: #fff;
}

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

/* --- Grid Background --- */
.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Scan line effect */
.scan-line {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
  z-index: 1;
  pointer-events: none;
  animation: scanDown 25s linear infinite;
}

@keyframes scanDown {
  0% { top: -2px; opacity: 0; }
  5% { opacity: 1; }
  95% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-base);
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.95);
  border-bottom-color: var(--accent-dim);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--accent);
  position: relative;
}

.nav-logo .logo-icon::before {
  content: '';
  position: absolute;
  top: -3px;
  right: -3px;
  width: 6px;
  height: 6px;
  background: var(--accent);
}

.nav-logo-img {
  height: 36px;
  width: 36px;
  object-fit: cover;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 0.5rem 1.25rem !important;
  border: 1px solid var(--accent) !important;
  color: var(--accent) !important;
  transition: all var(--transition-fast) !important;
}

.nav-cta:hover {
  background: var(--accent) !important;
  color: var(--bg-primary) !important;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.98);
    padding: 1rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open {
    display: flex;
  }
}

/* --- Section Layout --- */
.section {
  position: relative;
  z-index: 2;
  padding: 3rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem;
  position: relative;
  transition: all var(--transition-base);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: var(--accent-dim);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.card:hover::before {
  opacity: 1;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: #fff;
  color: var(--bg-primary);
  box-shadow: 0 0 30px var(--accent-dim);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Tags --- */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.tag-accent {
  border-color: var(--accent-dim);
  color: var(--accent);
  background: var(--accent-dim);
}

/* --- Stat Counter --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 2;
  padding: 8rem 2rem 4rem;
}

.hero-overline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero-overline::before,
.hero-overline::after {
  content: '';
  width: 40px;
  height: 1px;
  background: var(--accent-dim);
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 550px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 3rem;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.hero-meta-item .icon {
  color: var(--accent);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Animated corners */
.corner-frame {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
}
.corner-frame::before,
.corner-frame::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border: 1px solid var(--accent-dim);
}
.corner-frame::before {
  top: 2rem;
  left: 2rem;
  border-right: none;
  border-bottom: none;
}
.corner-frame::after {
  bottom: 2rem;
  right: 2rem;
  border-left: none;
  border-top: none;
}

/* --- Animated gradient border --- */
.gradient-border {
  position: relative;
}
.gradient-border::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary), var(--accent-warn), var(--accent));
  background-size: 200% 100%;
  animation: gradientShift 4s linear infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 0%; }
  100% { background-position: 200% 0%; }
}

/* --- Scroll reveal animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.4s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.5s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 0.6s; opacity: 1; transform: none; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 0.7s; opacity: 1; transform: none; }

/* --- Particle canvas --- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* --- Glitch text effect --- */
.glitch {
  position: relative;
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.glitch::before {
  animation: glitch1 3s infinite;
  clip-path: inset(20% 0 60% 0);
  color: var(--accent);
  opacity: 0.5;
}
.glitch::after {
  animation: glitch2 3s infinite;
  clip-path: inset(60% 0 10% 0);
  color: var(--accent-secondary);
  opacity: 0.5;
}

@keyframes glitch1 {
  0%, 90%, 100% { transform: none; }
  92% { transform: translate(2px, -1px); }
  94% { transform: translate(-2px, 1px); }
  96% { transform: translate(1px, 2px); }
}

@keyframes glitch2 {
  0%, 90%, 100% { transform: none; }
  91% { transform: translate(-1px, 2px); }
  93% { transform: translate(2px, -2px); }
  95% { transform: translate(-2px, 1px); }
}

/* --- Typing effect --- */
.typing-cursor::after {
  content: '|';
  color: var(--accent);
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* --- Footer --- */
.footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links a:hover {
  color: var(--accent);
}

/* --- Sponsor Grid --- */
.sponsor-tier {
  margin-bottom: 4rem;
}

.sponsor-tier-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.sponsor-grid {
  display: grid;
  gap: 1.5rem;
}

.sponsor-grid.tier-title {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.sponsor-grid.tier-partner {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.sponsor-grid.tier-supporting {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.sponsor-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all var(--transition-base);
  min-height: 160px;
}

.sponsor-card:hover {
  border-color: var(--accent-dim);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 212, 255, 0.05);
}

.sponsor-card .sponsor-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.sponsor-card .sponsor-type {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.sponsor-card.title-sponsor {
  border-color: var(--accent-dim);
  background: linear-gradient(135deg, var(--bg-card), rgba(0, 212, 255, 0.03));
}

.sponsor-card.title-sponsor .sponsor-name {
  font-size: 1.75rem;
  color: var(--accent);
}

/* --- Team Grid --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.team-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height var(--transition-base);
}

.team-card:hover::before {
  height: 100%;
}

.team-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.team-avatar {
  width: 64px;
  height: 64px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  font-weight: 700;
}

.team-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.team-role {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.team-school {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.team-bio {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- Track cards --- */
.tracks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.track-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  transition: all var(--transition-base);
  position: relative;
}

.track-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-3px);
}

.track-number {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.track-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.track-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.track-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* --- Timeline / Schedule --- */
.timeline {
  position: relative;
  padding-left: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -3rem;
  top: 0.5rem;
  width: 9px;
  height: 9px;
  background: var(--accent);
  transform: translateX(-4px);
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- University badges --- */
.university-row {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.uni-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.uni-shield {
  width: 72px;
  height: 72px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-primary);
  background: var(--bg-card);
  transition: border-color var(--transition-base);
}

.uni-badge:hover .uni-shield {
  border-color: var(--accent);
}

.uni-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* --- CTA Banner --- */
.cta-banner {
  position: relative;
  z-index: 2;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(123, 97, 255, 0.05));
  border: 1px solid var(--accent-dim);
  padding: 4rem 2rem;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto 4rem;
}

.cta-banner h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  margin-bottom: 1rem;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Hex pattern accent --- */
.hex-accent {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .section {
    padding: 4rem 1.25rem;
  }

  .hero {
    padding: 6rem 1.25rem 3rem;
  }

  .hero-meta {
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .tracks-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: 1fr;
  }

  .university-row {
    gap: 1.5rem;
  }
}

/* --- Loading animation --- */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-bar {
  width: 120px;
  height: 2px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}

.loader-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 50%;
  height: 100%;
  background: var(--accent);
  animation: loading 1s linear infinite;
}

@keyframes loading {
  0% { left: -50%; }
  100% { left: 100%; }
}

/* --- FAQ --- */
.faq-list {
  max-width: 800px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}

.faq-question {
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-question::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent);
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-top: 1rem;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}