/* ================================================================
   OPSY Design System — style.css
   "White like marble. Emerald green like an invaluable gem.
    Blue like the ocean and gold like the holy spirit."
   ================================================================ */

/* --- Google Fonts loaded in HTML head --- */

/* === DESIGN TOKENS === */
:root {
  /* Type Scale (fluid) */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 4px Spacing System */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Typography */
  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1280px;
  --content-full: 100%;
}

/* === LIGHT MODE (Focus palette — White / Green / Blue) === */
:root, [data-theme="light"] {
  --color-bg:             #FFFFFF;
  --color-surface:        #F8FAFC;
  --color-surface-2:      #F1F5F9;
  --color-surface-offset: #F8FAFC;
  --color-divider:        rgba(15, 23, 42, 0.08);
  --color-border:         rgba(15, 23, 42, 0.12);

  /* Text — slate scale, harmonises with the cooler whites + blue accent */
  --color-text:           #0F172A;
  --color-text-muted:     #334155;
  --color-text-faint:     #64748B;
  --color-text-inverse:   #FFFFFF;

  /* Emerald Green — Primary */
  --color-primary:        #0D6B4E;
  --color-primary-hover:  #0A5A40;
  --color-primary-active: #084832;
  --color-primary-light:  #E6F3EE;
  --color-primary-highlight: rgba(13, 107, 78, 0.08);

  /* Deep Marine — Secondary accent (editorial, pairs with emerald) */
  --color-secondary:      #1F3A68;
  --color-secondary-hover:#162A4D;
  --color-secondary-light:rgba(31, 58, 104, 0.08);

  /* Gold — Sacred Highlight */
  --color-gold:           #B8960C;
  --color-gold-hover:     #A3840A;
  --color-gold-light:     #FBF5E0;
  --color-gold-faint:     rgba(184, 150, 12, 0.12);

  /* Semantic */
  --color-success:        #437A22;
  --color-warning:        #964219;
  --color-error:          #A12C4D;

  /* Shadows (marble-warm) */
  --shadow-sm: 0 1px 2px rgba(26, 26, 24, 0.05);
  --shadow-md: 0 4px 16px rgba(26, 26, 24, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 26, 24, 0.12);
  --shadow-xl: 0 24px 64px rgba(26, 26, 24, 0.16);
  --shadow-glow-emerald: 0 0 40px rgba(13, 107, 78, 0.15);
  --shadow-glow-gold: 0 0 30px rgba(184, 150, 12, 0.2);
}

/* === DARK MODE === */
[data-theme="dark"] {
  --color-bg:             #0F1410;
  --color-surface:        #161B18;
  --color-surface-2:      #1C221F;
  --color-surface-offset: #192019;
  --color-divider:        rgba(232, 232, 228, 0.06);
  --color-border:         rgba(232, 232, 228, 0.16);

  --color-text:           #E8E8E4;
  --color-text-muted:     #8A8A84;
  --color-text-faint:     #5A5A55;
  --color-text-inverse:   #0F1410;

  --color-primary:        #3ECF7A;
  --color-primary-hover:  #4ADE80;
  --color-primary-active: #2DB866;
  --color-primary-light:  rgba(62, 207, 122, 0.1);
  --color-primary-highlight: rgba(62, 207, 122, 0.08);

  --color-secondary:      #5CADE4;
  --color-secondary-hover:#74BDE9;
  --color-secondary-light:rgba(92, 173, 228, 0.1);

  --color-gold:           #E8B931;
  --color-gold-hover:     #F0C84A;
  --color-gold-light:     rgba(232, 185, 49, 0.1);
  --color-gold-faint:     rgba(232, 185, 49, 0.08);

  --color-success:        #6DAA45;
  --color-warning:        #BB653B;
  --color-error:          #DD6974;

  --shadow-sm: 0 1px 2px rgba(0,0,0, 0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0, 0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0, 0.4);
  --shadow-xl: 0 24px 64px rgba(0,0,0, 0.5);
  --shadow-glow-emerald: 0 0 40px rgba(62, 207, 122, 0.15);
  --shadow-glow-gold: 0 0 30px rgba(232, 185, 49, 0.15);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0F1410;
    --color-surface:        #161B18;
    --color-surface-2:      #1C221F;
    --color-surface-offset: #192019;
    --color-divider:        rgba(232, 232, 228, 0.06);
    --color-border:         rgba(232, 232, 228, 0.16);
    --color-text:           #E8E8E4;
    --color-text-muted:     #8A8A84;
    --color-text-faint:     #5A5A55;
    --color-text-inverse:   #0F1410;
    --color-primary:        #3ECF7A;
    --color-primary-hover:  #4ADE80;
    --color-primary-active: #2DB866;
    --color-primary-light:  rgba(62, 207, 122, 0.1);
    --color-primary-highlight: rgba(62, 207, 122, 0.08);
    --color-secondary:      #5CADE4;
    --color-secondary-hover:#74BDE9;
    --color-secondary-light:rgba(92, 173, 228, 0.1);
    --color-gold:           #E8B931;
    --color-gold-hover:     #F0C84A;
    --color-gold-light:     rgba(232, 185, 49, 0.1);
    --color-gold-faint:     rgba(232, 185, 49, 0.08);
    --color-success:        #6DAA45;
    --color-warning:        #BB653B;
    --color-error:          #DD6974;
    --shadow-sm: 0 1px 2px rgba(0,0,0, 0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0,0,0, 0.4);
    --shadow-xl: 0 24px 64px rgba(0,0,0, 0.5);
    --shadow-glow-emerald: 0 0 40px rgba(62, 207, 122, 0.15);
    --shadow-glow-gold: 0 0 30px rgba(232, 185, 49, 0.15);
  }
}

/* ================================================================
   GLOBAL STYLES
   ================================================================ */

body {
  overflow-x: hidden;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
}

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

/* ================================================================
   LAYOUT
   ================================================================ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: 1.75rem;
}

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-32));
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-8), 5vw, var(--space-16));
}

.section-header h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 640px;
  margin-inline: auto;
}

/* Sacred Geometry Section Divider */
.section-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding-block: var(--space-2);
}

.section-divider::before,
.section-divider::after {
  content: '';
  flex: 1;
  max-width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  opacity: 0.4;
}

.section-divider .geo-node {
  width: 12px;
  height: 12px;
  color: var(--color-gold);
  opacity: 0.6;
}

/* ================================================================
   NAVIGATION
   ================================================================ */

.nav {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border, rgba(15, 23, 42, 0.08));
  transition: background 300ms var(--ease-out), box-shadow 300ms var(--ease-out);
}

.nav.scrolled {
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  box-shadow: 0 1px 0 var(--color-divider);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0.85rem 0;
}

.nav-cta {
  padding: 0.55rem 1.1rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 100px;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  flex-shrink: 0;
}

.nav-cta:hover {
  background: var(--color-primary-hover, #0A5A40);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -8px var(--color-primary);
}

.brand,
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: -0.005em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.nav-logo svg {
  width: 40px;
  height: 40px;
}

.nav-logo svg circle {
  stroke-width: 1.25;
}

.brand span,
.nav-logo span {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  position: relative;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 300ms var(--ease-out);
  position: relative;
  padding: var(--space-1) 0;
}

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

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

/* Sliding indicator pill */
.nav-indicator {
  position: absolute;
  bottom: -6px;
  left: 0;
  height: 2.5px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  pointer-events: none;
  transition: left 400ms cubic-bezier(0.16, 1, 0.3, 1),
              width 400ms cubic-bezier(0.16, 1, 0.3, 1),
              opacity 300ms ease;
  opacity: 0;
  will-change: left, width;
}

.nav-indicator.visible {
  opacity: 1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle,
[data-theme-toggle] {
  display: none !important;
}

/* Mobile menu */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-interactive);
}
.mobile-menu-btn:hover { background: rgba(0, 0, 0, 0.04); }
.mobile-menu-btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* On mobile, swap the Open Chat CTA for the hamburger trigger */
@media (max-width: 767px) {
  .nav-cta { display: none; }
}

/* When the mobile drawer is open, hide the underlying nav so only the X close shows */
body.menu-open .nav { visibility: hidden; }

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
}

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

.mobile-nav a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

.mobile-nav-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

/* ================================================================
   BUTTONS
   ================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.btn:active {
  transform: translateY(0);
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-glow-emerald);
  transform: translateY(-1px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  transform: translateY(-1px);
}

.btn-gold {
  background: transparent;
  color: var(--color-gold);
  border: 1.5px solid var(--color-gold);
}

.btn-gold:hover {
  background: var(--color-gold-faint);
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-1px);
  color: var(--color-gold);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

/* ================================================================
   HERO SECTION
   ================================================================ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--space-20);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-geo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(700px, 90vw);
  height: min(700px, 90vw);
  opacity: 0.04;
  animation: geo-rotate 120s linear infinite;
}

[data-theme="dark"] .hero-geo {
  opacity: 0.06;
}

@keyframes geo-rotate {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  padding-inline: var(--space-6);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.hero-badge .pulse-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero h1 .accent {
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  margin-bottom: var(--space-12);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  justify-content: center;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums lining-nums;
}

.hero-stat strong {
  color: var(--color-text);
  font-weight: 700;
}

.hero-stat .stat-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-gold);
  opacity: 0.6;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  animation: scroll-hint 2s ease-in-out infinite;
}

@keyframes scroll-hint {
  0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.8; transform: translateX(-50%) translateY(6px); }
}

/* ================================================================
   THREE PILLARS
   ================================================================ */

.pillars-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.pillar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--color-primary);
  opacity: 0.6;
}

.pillar-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xl);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.pillar-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.pillar-card p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-inline: auto;
}

/* ================================================================
   MARKETPLACE CARDS
   ================================================================ */

.marketplace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .marketplace-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.dataset-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}

.dataset-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
}

.dataset-card.featured {
  border-color: var(--color-gold);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-gold-light) 100%);
  position: relative;
}

.dataset-card.featured::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), color-mix(in srgb, var(--color-gold) 40%, transparent));
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.card-header h3 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-open {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-request {
  background: var(--color-secondary-light);
  color: var(--color-secondary);
}

.badge-licensed {
  background: var(--color-gold-light);
  color: var(--color-gold);
}

.badge-featured {
  background: var(--color-gold-faint);
  color: var(--color-gold);
  border: 1px solid color-mix(in srgb, var(--color-gold) 20%, transparent);
}

.card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.card-meta .tag {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  background: var(--color-surface-2);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.card-stat {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}

.card-stat strong {
  color: var(--color-text-muted);
}

.card-action {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  background: none;
  border: none;
  transition: color var(--transition-interactive);
}

.card-action:hover {
  color: var(--color-primary-hover);
}

/* ================================================================
   CONTRIBUTOR SECTION
   ================================================================ */

.contributor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: 800px;
  margin-inline: auto;
}

@media (min-width: 640px) {
  .contributor-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contributor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  text-align: center;
}

.contributor-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  margin: 0 auto var(--space-3);
}

.contributor-card h4 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.contributor-card p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.trust-indicators {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-8);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}

.trust-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ================================================================
   DASHBOARD PREVIEW
   ================================================================ */

.dashboard-preview {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  overflow: hidden;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .kpi-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.kpi-card {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
}

.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
}

.kpi-delta {
  font-size: var(--text-xs);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-top: var(--space-1);
}

.kpi-delta.up { color: var(--color-success); }
.kpi-delta.down { color: var(--color-error); }

.charts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .charts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.chart-container {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
}

.chart-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.chart-wrapper {
  position: relative;
  width: 100%;
  height: 220px;
}

/* ================================================================
   INSIGHTS / LITERATURE
   ================================================================ */

/* Chat Preview */
.chat-preview {
  max-width: 700px;
  margin-inline: auto;
}

.chat-preview-window {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-height: 280px;
}

.chat-preview-msg {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.chat-preview-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-primary-light);
}

.chat-preview-avatar svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

.chat-preview-bubble {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.6;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-divider);
}

.chat-preview-starters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-left: 44px;
}

.chat-preview-starter {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition-interactive);
}

.chat-preview-starter:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.chat-preview-input {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.chat-preview-input:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}

.chat-preview-input input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  outline: none;
}

.chat-preview-input input::placeholder {
  color: var(--color-text-faint);
}

.chat-preview-send {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-interactive);
}

.chat-preview-send:hover {
  transform: scale(1.05);
}

.chat-preview-send svg {
  width: 16px;
  height: 16px;
}

.chat-preview-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.chat-preview-footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

@media (max-width: 640px) {
  .chat-preview-starters {
    padding-left: 0;
  }
}

/* ================================================================
   TRUST & PRIVACY
   ================================================================ */

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

.privacy-card {
  text-align: center;
  padding: var(--space-6);
}

.privacy-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  color: var(--color-primary);
}

.privacy-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.privacy-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-inline: auto;
  max-width: 320px;
}

/* ================================================================
   RESEARCHERS
   ================================================================ */

.researcher-form {
  max-width: 560px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  margin-top: var(--space-2);
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-6);
  color: var(--color-primary);
}

.form-success.show {
  display: block;
}

.form-success h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.form-success p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ================================================================
   CTA SECTION
   ================================================================ */

.cta-section {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-surface) 50%, var(--color-gold-light) 100%);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .cta-section {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-2) 50%, var(--color-surface) 100%);
}

.cta-geo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  opacity: 0.03;
}

[data-theme="dark"] .cta-geo {
  opacity: 0.04;
}

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

.cta-content h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.cta-content p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  max-width: 560px;
  margin-inline: auto;
}

.cta-content .newsletter-form {
  max-width: 460px;
  margin-inline: auto;
}

.cta-content .newsletter-success {
  margin-top: var(--space-4);
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* ================================================================
   JOIN FORM
   ================================================================ */

.join-form-wrapper {
  max-width: 600px;
  margin-inline: auto;
}

.join-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.join-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
  padding: var(--space-8);
}

.join-success.show {
  display: flex;
}

.join-success h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

.join-success p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ================================================================
   FOOTER
   ================================================================ */

.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .footer-inner {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
  }
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  text-decoration: none;
  color: var(--color-text);
}

.footer-logo svg {
  width: 32px;
  height: 32px;
}

.footer-logo span {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.footer-initiative {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-initiative a {
  color: var(--color-gold);
  text-decoration: none;
}

.footer-initiative a:hover {
  color: var(--color-gold-hover);
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.footer-bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-bottom a {
  color: var(--color-text-faint);
  text-decoration: none;
  font-size: var(--text-xs);
}

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

/* ================================================================
   SCROLL REVEAL ANIMATIONS
   ================================================================ */

.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* JS-based scroll reveal animation */
.js-reveal {
  opacity: 1; /* visible by default — JS adds animation class */
  transition: opacity 0.6s var(--ease-out);
}

.js-reveal.will-animate {
  opacity: 0;
}

.js-reveal.revealed {
  opacity: 1;
}

/* ================================================================
   DATA BOUNTY SECTION
   ================================================================ */

.bounty-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 800px;
  margin: var(--space-8) auto 0;
}

@media (min-width: 640px) {
  .bounty-features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.bounty-feature {
  text-align: center;
}

.bounty-feature svg {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-3);
  color: var(--color-secondary);
}

.bounty-feature h4 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.bounty-feature p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-inline: auto;
}

/* ================================================================
   UTILITY CLASSES
   ================================================================ */

.text-center { text-align: center; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

/* ================================================================
   RESPONSIVE ADJUSTMENTS
   ================================================================ */

@media (max-width: 767px) {
  .hero h1 {
    font-size: var(--text-2xl);
  }

  .hero-stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-3) var(--space-4);
  }

  .hero-stat {
    font-size: var(--text-xs);
  }

  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-header h2 {
    font-size: var(--text-xl);
  }
}

@media (max-width: 479px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-lg {
    width: 100%;
  }
}

/* ================================================================
   NEWSLETTER / MAILING LIST
   ================================================================ */

.container--narrow {
  width: 100%;
  max-width: var(--content-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.newsletter-section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
  background: var(--color-bg);
  border-top: 1px solid var(--color-divider);
}

.newsletter-inner {
  text-align: center;
}

.newsletter-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.newsletter-inner h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.newsletter-inner p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 420px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.newsletter-form {
  max-width: 420px;
  margin-inline: auto;
}

.newsletter-field {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.newsletter-field input[type="email"] {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.newsletter-field input[type="email"]::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.newsletter-field input[type="email"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}

/* dark mode focus handled by design tokens */

.newsletter-field .btn {
  flex-shrink: 0;
  white-space: nowrap;
}

.newsletter-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  opacity: 0.7;
  margin-bottom: 0;
}

.newsletter-success {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-size: var(--text-base);
  font-weight: 500;
  padding: var(--space-4);
  animation: fadeInUp 0.4s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 479px) {
  .newsletter-field {
    flex-direction: column;
  }

  .newsletter-field .btn {
    width: 100%;
  }
}

/* ================================================================
   LIVE ACTIVITY FEED
   ================================================================ */

.activity-feed {
  margin-top: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.activity-feed-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.live-indicator .pulse-dot {
  width: 8px;
  height: 8px;
  background: #22C55E;
  border-radius: 50%;
  animation: pulse-live 2s infinite;
}

@keyframes pulse-live {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}

.activity-feed-list {
  padding: var(--space-3) var(--space-6);
  max-height: 240px;
  overflow-y: auto;
}

.activity-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
  animation: slideInFeed 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.activity-item:last-child {
  border-bottom: none;
}

@keyframes slideInFeed {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.activity-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.activity-text {
  flex: 1;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.activity-text strong {
  color: var(--color-text);
  font-weight: 500;
}

.activity-time {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  flex-shrink: 0;
  white-space: nowrap;
}

.activity-placeholder {
  text-align: center;
  padding: var(--space-6);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

/* KPI value animation on live update */
.kpi-value.updating {
  animation: kpiPop 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes kpiPop {
  0% { transform: scale(1); }
  30% { transform: scale(1.15); color: var(--color-primary); }
  100% { transform: scale(1); }
}

/* ================================================================
   DEMOGRAPHICS ROW
   ================================================================ */

.demographics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.demo-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
}

.demo-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.demo-bar-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 6px 0;
}

.demo-bar-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  width: 80px;
  text-align: right;
  flex-shrink: 0;
}

.demo-bar-track {
  flex: 1;
  height: 18px;
  background: var(--color-surface-2);
  border-radius: 9px;
  overflow: hidden;
}

.demo-bar-fill {
  height: 100%;
  border-radius: 9px;
  background: var(--color-primary);
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  min-width: 4px;
}

.demo-bar-fill.gender {
  background: var(--color-ocean, #1B4D6E);
}

.demo-bar-value {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  width: 24px;
  flex-shrink: 0;
}

.demo-empty {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  text-align: center;
  padding: var(--space-4);
}

@media (max-width: 768px) {
  .demographics-row {
    grid-template-columns: 1fr;
  }
}