/* ============================================
   CRS FinTech Powered by CRS — SF Hacks 2026
   Theming, typography, layout
   ============================================ */

:root {
  /* CRS palette: purple highlights, grey backgrounds */
  --color-bg: #0c1218;
  --color-bg-elevated: #141c24;
  --color-bg-card: #1a232e;
  --color-surface: #222d3a;

  --color-text: #e8ecf0;
  --color-text-muted: #8b9aaa;
  --color-text-strong: #ffffff;

  --color-primary: #7c3aed;
  --color-primary-hover: #8b5cf6;
  --color-primary-muted: rgba(124, 58, 237, 0.15);
  --color-accent: #ea580c;
  --color-accent-muted: rgba(234, 88, 12, 0.12);

  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-strong: rgba(255, 255, 255, 0.12);

  --font-heading: "Syne", system-ui, sans-serif;
  --font-body: "Plus Jakarta Sans", system-ui, sans-serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.3);

  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Prize card gradients */
  --prize-1st-border: linear-gradient(135deg, #ea580c 0%, #f97316 50%, #fb923c 100%);
  --prize-2nd-border: linear-gradient(135deg, #7c3aed 0%, #8b5cf6 50%, #a78bfa 100%);
  --prize-3rd-border: linear-gradient(135deg, #475569 0%, #64748b 50%, #94a3b8 100%);
  --prize-1st-glow: rgba(234, 88, 12, 0.25);
  --prize-2nd-glow: rgba(124, 58, 237, 0.25);
  --prize-3rd-glow: rgba(100, 116, 139, 0.25);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Focus visible for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Visually hidden (for screen readers) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* CRS logo — inline SVG, currentColor for dark background */
.crs-logo {
  display: block;
  height: auto;
  color: var(--color-text-strong);
}

.crs-logo-hero {
  width: min(420px, 85vw);
  max-width: 100%;
  margin: 0 auto;
}

.crs-logo-nav {
  width: 120px;
  height: auto;
}

.crs-logo-footer {
  width: 140px;
  height: auto;
  margin-bottom: var(--space-sm);
}

/* --------------------------------------------
   Layout
   -------------------------------------------- */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-5xl) 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-xl);
  letter-spacing: -0.02em;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3xl);
  max-width: 560px;
}

/* --------------------------------------------
   Hero
   -------------------------------------------- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl) var(--space-lg);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-primary-muted), transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 60%, var(--color-accent-muted), transparent 45%),
    var(--color-bg);
  opacity: 0.95;
}

.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
}

.hero-logo-wrap {
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-subtitle-text {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 var(--space-lg);
  animation: fadeInUp 0.6s ease 0.15s both;
}

.sponsor-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  margin-bottom: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  animation: fadeInUp 0.6s ease forwards;
}

.badge-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.badge-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-strong);
}

.hero-title {
  margin: 0 0 var(--space-md);
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto var(--space-xl);
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.3s both;
}

/* --------------------------------------------
   Buttons & links
   -------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

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

.btn-cta-primary:hover {
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-strong);
  border: none;
}

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

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.link-arrow {
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.link-arrow:hover {
  color: var(--color-primary-hover);
  transform: translateX(2px);
}

/* --------------------------------------------
   Cards
   -------------------------------------------- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-sm);
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* Prize grid & cards */
.prize-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  align-items: stretch;
}

@media (min-width: 768px) {
  .prize-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card-prize {
  position: relative;
  overflow: hidden;
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-sm);
}

.card-prize::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--prize-accent);
  transition: height var(--transition-base), box-shadow var(--transition-base);
}

.card-prize-1st { --prize-accent: var(--prize-1st-border); }
.card-prize-2nd { --prize-accent: var(--prize-2nd-border); }
.card-prize-3rd { --prize-accent: var(--prize-3rd-border); }

.card-prize:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-6px);
  box-shadow: var(--prize-glow);
}

.card-prize:hover::before {
  height: 5px;
  box-shadow: 0 2px 12px var(--prize-glow-color);
}

.card-prize-1st:hover::before { --prize-glow-color: var(--prize-1st-glow); }
.card-prize-2nd:hover::before { --prize-glow-color: var(--prize-2nd-glow); }
.card-prize-3rd:hover::before { --prize-glow-color: var(--prize-3rd-glow); }

.card-prize-1st:hover { --prize-glow: 0 12px 40px var(--prize-1st-glow), 0 0 0 1px rgba(234, 88, 12, 0.2); }
.card-prize-2nd:hover { --prize-glow: 0 12px 40px var(--prize-2nd-glow), 0 0 0 1px rgba(124, 58, 237, 0.2); }
.card-prize-3rd:hover { --prize-glow: 0 12px 40px var(--prize-3rd-glow), 0 0 0 1px rgba(100, 116, 139, 0.2); }

.card-prize .prize-placement {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.card-prize-1st .prize-placement {
  background: linear-gradient(135deg, rgba(234, 88, 12, 0.2) 0%, rgba(249, 115, 22, 0.15) 100%);
  color: #fb923c;
  border: 1px solid rgba(234, 88, 12, 0.4);
}

.card-prize-2nd .prize-placement {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.2) 0%, rgba(139, 92, 246, 0.15) 100%);
  color: #a78bfa;
  border: 1px solid rgba(124, 58, 237, 0.4);
}

.card-prize-3rd .prize-placement {
  background: linear-gradient(135deg, rgba(71, 85, 105, 0.3) 0%, rgba(100, 116, 139, 0.2) 100%);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.4);
}

.card-prize .prize-amount {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}

.card-prize-1st .prize-amount { color: #fb923c; }
.card-prize-2nd .prize-amount { color: #a78bfa; }
.card-prize-3rd .prize-amount { color: #94a3b8; }

.card-prize h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
}

.card-prize p {
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* Feature card (API section) */
.card-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  padding: var(--space-2xl);
}

.card-feature h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.steps-list {
  margin: 0 0 var(--space-lg);
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.steps-list li {
  margin-bottom: var(--space-sm);
}

.card-feature-visual {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.code-block {
  font-family: ui-monospace, monospace;
  font-size: 0.875rem;
  color: var(--color-primary);
  line-height: 1.8;
}

.code-block code {
  background: none;
  padding: 0;
}

/* --------------------------------------------
   Getting Started — step-by-step & code panel
   -------------------------------------------- */
.api-endpoint-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  margin-bottom: var(--space-3xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
}

.api-endpoint-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.api-endpoint-url {
  font-family: ui-monospace, monospace;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-strong);
  background: var(--color-bg);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
}

.api-endpoint-note {
  width: 100%;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.getting-started-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: var(--space-3xl);
}

.step-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: start;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.step-card + .step-card {
  margin-top: var(--space-xl);
}

.step-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  min-width: 2.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary);
  background: var(--color-primary-muted);
  border-radius: var(--radius-md);
}

.step-content h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-sm);
}

.step-content p {
  margin: 0 0 var(--space-sm);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.step-content p:last-child {
  margin-bottom: 0;
}

.step-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.step-form-input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.step-form-input::placeholder {
  color: var(--color-text-muted);
}

.step-form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.step-form .btn {
  padding: 0.75rem 1.5rem;
  white-space: nowrap;
}

.step-form .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-message {
  width: 100%;
  margin-top: var(--space-sm);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.form-message-success {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message-error {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.step-content .link-arrow {
  font-size: 0.9375rem;
}

.code-panel {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-top: var(--space-2xl);
}

.code-panel-header {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.code-panel-title {
  color: var(--color-text);
}

.code-panel-body {
  margin: 0;
  padding: var(--space-lg);
  font-family: ui-monospace, "SF Mono", Monaco, monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text);
  overflow-x: auto;
}

.code-panel-body code {
  background: none;
  padding: 0;
}

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

.code-panel-body .code-comment {
  color: #6b7280;
}

/* --------------------------------------------
   About CRS — dark section, stats grid, two-column
   -------------------------------------------- */
.section-about {
  position: relative;
  background: #080c10;
}

.about-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 30% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 70% 80%, rgba(234, 88, 12, 0.06) 0%, transparent 45%);
  pointer-events: none;
}

.section-about .container {
  position: relative;
}

.section-about .section-title {
  color: var(--color-text-strong);
  margin-bottom: var(--space-3xl);
}

.about-hero-intro {
  margin-bottom: var(--space-3xl);
}

.section-about .about-hero-lead {
  font-size: 1.0625rem;
  color: var(--color-text);
  line-height: 1.65;
  margin: 0 0 var(--space-lg);
}

/* Tagline — standout quote block, matches site accent treatment */
.about-tagline-wrap {
  padding: var(--space-lg) var(--space-xl);
  background: rgba(255, 255, 255, 0.04);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 0;
}

.about-tagline {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-strong);
  margin: 0;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.about-tagline-wrap .about-tagline-sub {
  display: block;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* Performance metrics grid — full width */
.about-stats-wrap {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border-top: 3px solid var(--color-primary);
  margin-bottom: var(--space-3xl);
}

.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

@media (min-width: 600px) {
  .about-stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
  }
}

.about-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-base), background var(--transition-base);
}

.about-stat:hover {
  border-color: rgba(124, 58, 237, 0.4);
  background: var(--color-primary-muted);
}

.about-stat-icon {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  color: var(--color-accent);
}

.about-stat-icon svg {
  width: 22px;
  height: 22px;
}

.about-stat-value {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-strong);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.about-stat-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-muted);
  line-height: 1.35;
}

/* Platform description + differentiators (below metrics) */
.about-platform-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.about-platform-desc {
  font-size: 1.0625rem;
  color: var(--color-text);
  line-height: 1.65;
  margin: 0;
}

.about-differentiators {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about-differentiators li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.5;
}

.about-diff-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  background: var(--color-primary-muted);
  color: var(--color-primary);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
}

.about-differentiators strong {
  color: var(--color-text-strong);
}

.about-cta {
  display: inline-flex;
}

.about-products-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-lg);
}

.section-about .about-products-title:first-of-type {
  margin-top: 0;
}

.about-products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.about-product-card {
  padding: var(--space-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.about-product-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.about-product-card h4 {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 var(--space-sm);
}

.about-product-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.55;
}

.about-solutions-wrap {
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.about-solutions-wrap .about-products-title {
  margin-bottom: var(--space-sm);
}

.about-solutions-lead {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg);
  line-height: 1.5;
}

.about-cta-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-lg);
}

.about-cta-wrap .link-arrow {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.about-cta-wrap .link-arrow:hover {
  color: var(--color-primary);
}

/* --------------------------------------------
   Real-World Inspiration — company cards
   -------------------------------------------- */
.inspiration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

@media (min-width: 900px) {
  .inspiration-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .inspiration-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.inspiration-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.inspiration-card:hover {
  border-left-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.inspiration-emoji {
  display: block;
  font-size: 1.75rem;
  line-height: 1;
  margin-bottom: var(--space-md);
}

.inspiration-category {
  display: inline-block;
  align-self: flex-start;
  padding: var(--space-xs) var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: var(--color-primary-muted);
  border-radius: var(--radius-sm);
}

.inspiration-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-xs);
}

.inspiration-name a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.inspiration-name a:hover {
  color: var(--color-primary);
}

.inspiration-tagline {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg);
  line-height: 1.4;
}

.inspiration-block {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.55;
  margin: 0 0 var(--space-md);
}

.inspiration-block:last-child {
  margin-bottom: 0;
}

.inspiration-block strong {
  color: var(--color-text-strong);
}

/* --------------------------------------------
   Project Ideas — expandable cards, two categories
   -------------------------------------------- */
.ideas-note {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-2xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-card);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  max-width: 560px;
}

.ideas-category {
  margin-bottom: var(--space-3xl);
}

.ideas-category:last-child {
  margin-bottom: 0;
}

.ideas-category-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.ideas-category-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
  max-width: 560px;
}

.ideas-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.idea-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.idea-card:hover {
  border-color: var(--color-border-strong);
}

.idea-card[open] {
  box-shadow: var(--shadow-sm);
}

.idea-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
  cursor: pointer;
  list-style: none;
}

.idea-summary::-webkit-details-marker {
  display: none;
}

.idea-summary::after {
  content: "+";
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.idea-card[open] .idea-summary::after {
  content: "−";
}

.idea-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-strong);
}

.idea-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.idea-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-primary-muted);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.idea-detail {
  padding: 0 var(--space-xl) var(--space-xl);
}

.idea-detail p {
  margin: 0 0 var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.idea-detail p:last-child {
  margin-bottom: 0;
}

/* Anomaly category — visually distinct */
.ideas-category-anomaly {
  padding: var(--space-2xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-accent);
}

.ideas-category-anomaly .ideas-category-title {
  color: var(--color-text-strong);
}

.ideas-category-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent-muted);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
}

.idea-card-anomaly {
  border-color: rgba(234, 88, 12, 0.2);
}

.idea-card-anomaly:hover,
.idea-card-anomaly[open] {
  border-color: rgba(234, 88, 12, 0.4);
}

.idea-card-anomaly .idea-tag {
  background: var(--color-accent-muted);
  color: var(--color-accent);
}

/* Judging criteria */
/* Judging — eligibility note */
.judging-eligibility {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-3xl);
  background: var(--color-primary-muted);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: var(--radius-md);
}

.judging-eligibility-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-bg-card);
  border-radius: 50%;
}

.judging-eligibility p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.judging-eligibility strong {
  color: var(--color-primary);
}

/* Judging — criterion cards with icons and weights */
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.criterion-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.criterion-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.criterion-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.criterion-icon svg {
  width: 28px;
  height: 28px;
}

.criterion-card h3 {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-sm);
}

.criterion-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* --------------------------------------------
   Section backgrounds (subtle variety)
   -------------------------------------------- */
.section-prizes,
.section-ideas,
.section-judging {
  background: var(--color-bg-elevated);
}

.section-api .container .card-feature {
  background: var(--color-bg-card);
}

/* --------------------------------------------
   Sticky nav
   -------------------------------------------- */
.nav-sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) var(--space-lg);
  background: rgba(12, 18, 24, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transform: translateY(-100%);
  transition: transform var(--transition-base);
}

.nav-sticky.is-visible {
  transform: translateY(0);
}

.nav-sticky-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.nav-back-top {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-primary);
  background: var(--color-primary-muted);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.nav-back-top:hover {
  background: var(--color-primary);
  color: var(--color-text-strong);
  transform: translateY(-2px);
}

/* --------------------------------------------
   Section reveal (scroll-triggered fade-in)
   -------------------------------------------- */
.section-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.section-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* No reduced motion: keep animations for those who prefer them */
@media (prefers-reduced-motion: reduce) {
  .section-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .section-reveal.is-visible { opacity: 1; }
}

/* --------------------------------------------
   CTA section (before footer)
   -------------------------------------------- */
.section-cta {
  position: relative;
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-bg-elevated) 0%, var(--color-bg) 100%);
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 50%, var(--color-primary-muted) 0%, transparent 60%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.cta-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-text-strong);
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}

.cta-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
  line-height: 1.6;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.btn-cta-primary {
  padding: var(--space-md) var(--space-2xl);
  font-size: 1rem;
}

.cta-secondary {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
}

.cta-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.cta-link:hover {
  color: var(--color-primary-hover);
}

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

/* --------------------------------------------
   Footer (expanded)
   -------------------------------------------- */
.footer {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand-block {
  max-width: 280px;
}

.footer-brand {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  margin-bottom: var(--space-md);
  transition: opacity var(--transition-fast);
}

.footer-brand:hover {
  opacity: 0.9;
}

.footer-brand .crs-logo {
  color: var(--color-text-strong);
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-strong);
}

.footer-brand-track {
  font-size: 0.8125rem;
  color: var(--color-primary);
  font-weight: 600;
}

.footer-tagline {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

.footer-block {
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}

.footer-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
  line-height: 1.5;
}

.footer-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary-hover);
}

.footer-social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-social-link {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-social-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------
   Back to top (fixed button)
   -------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 99;
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), background var(--transition-fast), color var(--transition-fast);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
  color: var(--color-text-strong);
  transform: translateY(-2px);
}

/* --------------------------------------------
   Animations
   -------------------------------------------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger card animations on scroll (optional, enhanced via JS) */
.card,
.inspiration-card,
.criterion-card {
  animation: fadeInUp 0.5s ease backwards;
}

.prize-grid .card:nth-child(1) { animation-delay: 0.05s; }
.prize-grid .card:nth-child(2) { animation-delay: 0.1s; }
.prize-grid .card:nth-child(3) { animation-delay: 0.15s; }
.inspiration-card:nth-child(1) { animation-delay: 0.05s; }
.inspiration-card:nth-child(2) { animation-delay: 0.1s; }
.inspiration-card:nth-child(3) { animation-delay: 0.15s; }
.inspiration-card:nth-child(4) { animation-delay: 0.2s; }
.inspiration-card:nth-child(5) { animation-delay: 0.25s; }
.inspiration-card:nth-child(6) { animation-delay: 0.3s; }
.card-grid .card:nth-child(1) { animation-delay: 0.05s; }
.card-grid .card:nth-child(2) { animation-delay: 0.1s; }
.card-grid .card:nth-child(3) { animation-delay: 0.15s; }
.card-grid .card:nth-child(4) { animation-delay: 0.2s; }

.criterion-card:nth-child(1) { animation-delay: 0.05s; }
.criterion-card:nth-child(2) { animation-delay: 0.1s; }
.criterion-card:nth-child(3) { animation-delay: 0.15s; }
.criterion-card:nth-child(4) { animation-delay: 0.2s; }
.criterion-card:nth-child(5) { animation-delay: 0.25s; }

/* --------------------------------------------
   Responsive
   -------------------------------------------- */
@media (max-width: 768px) {
  .section {
    padding: var(--space-4xl) 0;
  }

  .api-endpoint-panel {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-md) var(--space-lg);
  }

  .api-endpoint-url {
    font-size: 0.875rem;
    word-break: break-all;
  }

  .step-card {
    grid-template-columns: 1fr;
    padding: var(--space-lg);
  }

  .step-number {
    width: 2.25rem;
    height: 2.25rem;
    min-width: 2.25rem;
    font-size: 0.9375rem;
  }

  .step-form {
    flex-direction: column;
    align-items: stretch;
  }

  .step-form .btn {
    width: 100%;
    max-width: none;
  }

  .code-panel-body {
    padding: var(--space-md);
    font-size: 0.75rem;
  }

  .about-products {
    grid-template-columns: 1fr;
  }

  .inspiration-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .idea-summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .ideas-category-anomaly {
    padding: var(--space-lg);
  }

  .prize-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .card-feature {
    grid-template-columns: 1fr;
    padding: var(--space-lg);
  }

  .card-feature-visual {
    order: -1;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .footer-brand-block {
    max-width: none;
  }

  .nav-links {
    display: none;
  }

  .nav-sticky-inner {
    justify-content: space-between;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand-block {
    margin: 0 auto;
  }

  .footer-brand {
    align-items: center;
  }

  .back-to-top {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  :root {
    --space-4xl: 4rem;
  }

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

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