/**
 * Quantum Field Inc. — Main Stylesheet
 * Ultra-premium, institutional design for regulated financial services
 * 
 * Structure:
 * 1. CSS Custom Properties (Design Tokens)
 * 2. Reset & Base Styles
 * 3. Typography
 * 4. Layout Components
 * 5. Header & Navigation
 * 6. Sections
 * 7. Cards & Components
 * 8. Forms
 * 9. Footer
 * 10. Utilities
 * 11. Animations
 * 12. Dark Theme
 */

/* ===========================================
   1. CSS CUSTOM PROPERTIES
   =========================================== */
:root {
  /* Safe Areas */
  --sat: env(safe-area-inset-top);
  --sab: env(safe-area-inset-bottom);
  --sal: env(safe-area-inset-left);
  --sar: env(safe-area-inset-right);
  --app-height: 100dvh;

  /* Layout */
  --header-h: 72px;
  --maxw: 1200px;
  --contentw: 680px;
  --base: 16px;
  --lh: 1.65;

  /* Spacing Scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;

  /* Tap Targets */
  --tap: 44px;

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 50;
  --z-header: 100;
  --z-modal: 200;
  --z-toast: 300;

  /* Colors — Light Theme (Default) */
  --white: #FFFFFF;
  --bg-primary: #FAFBFC;
  --bg-secondary: #F4F6F8;
  --bg-tertiary: #EDF0F4;
  --bg-card: #FFFFFF;
  --bg-card-alt: #F8F9FB;
  --bg-input: #FFFFFF;

  /* Text Colors */
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-tertiary: #64748B;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;

  /* Border Colors */
  --border-primary: #E2E8F0;
  --border-secondary: #F1F5F9;
  --border-input: #CBD5E1;
  --border-input-focus: #94A3B8;
  --border-accent: rgba(15, 23, 42, 0.08);

  /* Accent — Deep Navy */
  --accent-primary: #1E3A5F;
  --accent-secondary: #2D4A6F;
  --accent-light: #3D5A7F;
  --accent-subtle: rgba(30, 58, 95, 0.06);
  --accent-border: rgba(30, 58, 95, 0.12);

  /* Secondary Accent — Warm */
  --warm: #8B7355;
  --warm-light: #A08B70;
  --warm-subtle: rgba(139, 115, 85, 0.08);

  /* Status Colors */
  --success: #059669;
  --success-subtle: rgba(5, 150, 105, 0.08);
  --error: #DC2626;
  --error-subtle: rgba(220, 38, 38, 0.08);
  --warning: #D97706;
  --warning-subtle: rgba(217, 119, 6, 0.08);

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02);
  --shadow-card-hover: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);

  /* Transitions */
  --transition-fast: 0.1s ease;
  --transition-base: 0.15s ease;
  --transition-slow: 0.25s ease;
}

/* ===========================================
   2. RESET & BASE STYLES
   =========================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--base);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 40px);
  background: var(--bg-primary);
  color: var(--text-primary);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

body {
  min-height: var(--app-height);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px;
  line-height: var(--lh);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: var(--accent-subtle);
  color: var(--accent-primary);
}

/* ===========================================
   3. TYPOGRAPHY
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 { font-size: clamp(36px, 6vw, 56px); line-height: 1.1; }
h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; }
h3 { font-size: clamp(20px, 3vw, 24px); }
h4 { font-size: 18px; }
h5 { font-size: 16px; }
h6 { font-size: 14px; }

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

/* ===========================================
   4. LAYOUT COMPONENTS
   =========================================== */
.skip {
  position: absolute;
  left: var(--space-md);
  top: -100px;
  z-index: 9999;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: 600;
  font-size: 13px;
  transition: top var(--transition-base);
}

.skip:focus {
  top: var(--space-md);
}

main {
  padding-top: calc(var(--header-h) + var(--sat));
}

.section {
  padding: clamp(64px, 10vw, 120px) clamp(24px, 5vw, 64px);
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
}

/* ===========================================
   5. HEADER & NAVIGATION
   =========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: calc(var(--header-h) + var(--sat));
  padding: calc(var(--space-md) + var(--sat)) clamp(24px, 5vw, 64px) var(--space-md);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-lg);
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-primary);
}

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

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  display: grid;
  place-items: center;
}

.logo-mark svg {
  width: 18px;
  height: 18px;
  color: var(--text-inverse);
}

.logo-text {
  font-family: 'IBM Plex Serif', serif;
  font-weight: 600;
  font-size: 17px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

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

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-xs);
  margin-right: var(--space-lg);
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  padding: var(--space-sm) 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-base), background var(--transition-base);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--accent-subtle);
}

/* Buttons */
.btn {
  height: 40px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-primary);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  background: var(--bg-secondary);
  border-color: var(--text-muted);
}

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

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--text-inverse);
}

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

.btn-lg {
  height: 48px;
  padding: 0 24px;
  font-size: 15px;
}

.menu-btn {
  display: flex;
  padding: 0;
  width: 40px;
}

@media (min-width: 1024px) {
  .menu-btn {
    display: none;
  }
}

/* Mobile Navigation */
.mobile-nav {
  position: fixed;
  top: calc(var(--header-h) + var(--sat));
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: calc(var(--z-header) - 1);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  transform: translateY(-110%);
  opacity: 0;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}

body[data-menu="open"] .mobile-nav {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav .nav-link {
  display: block;
  padding: 14px var(--space-md);
  font-size: 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-secondary);
}

/* ===========================================
   6. SECTIONS
   =========================================== */

/* Hero */
.hero {
  min-height: calc(90vh - var(--header-h) - var(--sat));
  display: flex;
  align-items: center;
  background: var(--bg-primary);
}

.hero-content {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-lg);
}

.hero-eyebrow .indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero-lead {
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
}

.hero-standard {
  padding: var(--space-lg) 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  max-width: 520px;
  box-shadow: var(--shadow-sm);
}

.hero-standard p {
  font-size: 15px;
  line-height: 1.6;
}

/* Section Headers */
.section-header {
  margin-bottom: var(--space-2xl);
}

.section-header.center {
  text-align: center;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.section-title {
  margin-bottom: var(--space-md);
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.6;
}

.section-header.center .section-desc {
  margin: 0 auto;
}

/* Metrics Bar */
.metrics {
  background: var(--bg-card);
  border-top: 1px solid var(--border-primary);
  border-bottom: 1px solid var(--border-primary);
}

.metrics-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric {
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  border-right: 1px solid var(--border-primary);
}

.metric:last-child {
  border-right: none;
}

@media (max-width: 768px) {
  .metric:nth-child(2) {
    border-right: none;
  }
  .metric:nth-child(3),
  .metric:nth-child(4) {
    border-top: 1px solid var(--border-primary);
  }
}

.metric-value {
  font-family: 'IBM Plex Serif', serif;
  font-size: 32px;
  font-weight: 600;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.metric-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Background Variations */
.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }

/* ===========================================
   7. CARDS & COMPONENTS
   =========================================== */

/* Capabilities Grid */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 900px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
}

.capability {
  background: var(--bg-card);
  padding: 40px var(--space-xl);
}

.capability-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-lg);
  color: var(--accent-primary);
  font-size: 20px;
}

.capability h3 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.capability p {
  font-size: 14px;
  line-height: 1.6;
}

/* Framework Grid */
.framework-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 900px) {
  .framework-grid {
    grid-template-columns: 1fr;
  }
}

.framework-item {
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.framework-item:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--text-muted);
}

.framework-num {
  font-family: 'IBM Plex Serif', serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--space-md);
}

.framework-item h3 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.framework-item p {
  font-size: 14px;
  line-height: 1.6;
}

/* Pillars Grid */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border-primary);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

@media (max-width: 500px) {
  .pillars-grid {
    grid-template-columns: 1fr;
  }
}

.pillar {
  background: var(--bg-card);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
}

.pillar-value {
  font-family: 'IBM Plex Serif', serif;
  font-size: 36px;
  font-weight: 600;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.pillar-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.pillar-desc {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

@media (max-width: 600px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

.service {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.service:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--text-muted);
}

.service-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-md);
  font-size: 18px;
}

.service h3 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.service p {
  font-size: 13px;
  line-height: 1.6;
}

/* Agent Cards */
.agents-intro {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  align-items: start;
}

@media (max-width: 900px) {
  .agents-intro {
    grid-template-columns: 1fr;
  }
}

.agents-intro-text p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.agents-intro-text p:last-child {
  margin-bottom: 0;
}

.agents-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.agent-feature {
  display: flex;
  gap: 14px;
  padding: 18px var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
}

.agent-feature-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.agent-feature-icon svg {
  width: 16px;
  height: 16px;
  color: var(--accent-primary);
}

.agent-feature h4 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.agent-feature p {
  font-size: 13px;
  line-height: 1.5;
}

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

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

.agent-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.agent-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--text-muted);
}

.agent-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: var(--space-md);
}

.agent-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: grid;
  place-items: center;
  font-size: 20px;
  flex-shrink: 0;
}

.agent-meta h3 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.agent-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.agent-card > p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

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

.agent-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.agent-list li::before {
  content: '→';
  color: var(--accent-primary);
  font-weight: 500;
  flex-shrink: 0;
}

/* Glass-box Section */
.glassbox-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: center;
}

@media (max-width: 900px) {
  .glassbox-content {
    grid-template-columns: 1fr;
  }
}

.glassbox-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.glassbox-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.glassbox-layer {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.glassbox-layer-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--accent-subtle);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.glassbox-layer-icon svg {
  width: 14px;
  height: 14px;
  color: var(--accent-primary);
}

.glassbox-layer span {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
}

.glassbox-connector {
  width: 2px;
  height: var(--space-md);
  background: var(--border-primary);
  margin-left: 33px;
}

.glassbox-text h3 {
  font-size: 24px;
  margin-bottom: var(--space-md);
}

.glassbox-text > p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

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

.glassbox-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.glassbox-list li svg {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Founder Section */
.founder-card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  padding: clamp(32px, 5vw, 48px);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.founder-card h3 {
  font-size: 24px;
  margin-bottom: var(--space-xs);
}

.founder-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-lg);
}

.founder-card > p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: var(--space-sm);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.founder-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: 28px;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-primary);
}

/* CTA Section */
.cta {
  border-top: 1px solid var(--border-primary);
  text-align: center;
}

.cta-content {
  max-width: 560px;
  margin: 0 auto;
}

.cta h2 {
  margin-bottom: var(--space-md);
}

.cta > .container > p,
.cta-content > p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 28px;
}

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

/* ===========================================
   8. FORMS
   =========================================== */
.contact-section {
  background: var(--bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  align-items: start;
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

.contact-info h2 {
  margin-bottom: var(--space-md);
}

.contact-info > p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

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

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.contact-detail-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-detail-icon svg {
  width: 18px;
  height: 18px;
  color: var(--accent-primary);
}

.contact-detail-content h4 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-detail-content p,
.contact-detail-content a {
  font-size: 14px;
  color: var(--text-secondary);
}

.contact-detail-content a:hover {
  color: var(--accent-primary);
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

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

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

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

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

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.form-label .required {
  color: var(--error);
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px var(--space-md);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 15px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

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

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.form-checkbox {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--accent-primary);
  flex-shrink: 0;
}

.form-checkbox-label {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.form-checkbox-label a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-sm);
}

.form-submit {
  width: 100%;
}

.form-note {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

/* Form States */
.form-group.error .form-input,
.form-group.error .form-select,
.form-group.error .form-textarea {
  border-color: var(--error);
}

.form-error {
  font-size: 12px;
  color: var(--error);
  display: none;
}

.form-group.error .form-error {
  display: block;
}

/* Form Messages */
.form-message {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  display: none;
  align-items: center;
  gap: var(--space-sm);
}

.form-message.show {
  display: flex;
}

.form-message.success {
  background: var(--success-subtle);
  color: var(--success);
  border: 1px solid var(--success);
}

.form-message.error {
  background: var(--error-subtle);
  color: var(--error);
  border: 1px solid var(--error);
}

.form-message svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Loading State */
.btn.loading {
  position: relative;
  color: transparent;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-primary.loading::after {
  border-top-color: var(--text-inverse);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===========================================
   9. FOOTER
   =========================================== */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-primary);
  padding: 56px clamp(24px, 5vw, 64px) calc(var(--space-xl) + var(--sab));
}

.footer-content {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
}

@media (max-width: 900px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 500px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

.footer-brand .logo {
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.6;
  max-width: 280px;
}

.footer-col h4 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

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

.footer-bottom {
  max-width: var(--maxw);
  margin: 40px auto 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-primary);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
  transition: color var(--transition-base);
}

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

/* ===========================================
   10. UTILITIES
   =========================================== */
.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;
}

/* ===========================================
   11. ANIMATIONS
   =========================================== */
.fade-in {
  animation: fadeIn 0.5s ease backwards;
}

.fade-in-delay-1 { animation-delay: 0.05s; }
.fade-in-delay-2 { animation-delay: 0.1s; }
.fade-in-delay-3 { animation-delay: 0.15s; }
.fade-in-delay-4 { animation-delay: 0.2s; }

/* ===========================================
   12. DARK THEME
   =========================================== */
html[data-theme="dark"] {
  --bg-primary: #0C1017;
  --bg-secondary: #111820;
  --bg-tertiary: #171F2A;
  --bg-card: #151C26;
  --bg-card-alt: #1A222E;
  --bg-input: #1A222E;

  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-tertiary: #94A3B8;
  --text-muted: #64748B;

  --border-primary: #1E293B;
  --border-secondary: #1A2332;
  --border-input: #334155;
  --border-input-focus: #64748B;
  --border-accent: rgba(241, 245, 249, 0.06);

  --accent-primary: #60A5FA;
  --accent-secondary: #3B82F6;
  --accent-light: #93C5FD;
  --accent-subtle: rgba(96, 165, 250, 0.08);
  --accent-border: rgba(96, 165, 250, 0.15);

  --warm: #D4A574;
  --warm-light: #E4B584;
  --warm-subtle: rgba(212, 165, 116, 0.1);

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.3);
}

html[data-theme="dark"] .header {
  background: rgba(12, 16, 23, 0.92);
}

html[data-theme="dark"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}

/* ===========================================
   ADDITIONS — Founder Avatar + Legal Pages
   =========================================== */

/* Founder headshot/avatar */
.founder-avatar {
  width: 112px;
  height: 112px;
  margin: 0 auto 18px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--border-primary);
  background: var(--bg-card-alt);
  box-shadow: var(--shadow-sm);
  display: grid;
  place-items: center;
}

.founder-avatar img,
.founder-avatar svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Simple legal page layout */
.legal {
  background: var(--bg-primary);
}

.legal .container {
  max-width: 980px;
}

.legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 40px);
  box-shadow: var(--shadow-sm);
}

.legal-card h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 10px;
}

.legal-meta {
  color: var(--text-tertiary);
  font-size: 13px;
  margin-bottom: 22px;
}

.legal-card h2 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 16px;
  font-weight: 700;
  margin: 26px 0 10px;
  color: var(--text-primary);
}

.legal-card p {
  color: var(--text-secondary);
  margin: 10px 0;
  line-height: 1.75;
}

.legal-card ul {
  margin: 10px 0 10px 18px;
  color: var(--text-secondary);
}

.legal-card li {
  margin: 8px 0;
}

.legal-card a {
  color: var(--accent-primary);
  text-decoration: none;
}

.legal-card a:hover {
  text-decoration: underline;
}

/* Convenience background helpers for section classnames used in some templates */
.founder { background: var(--bg-secondary); }
.cta { background: var(--bg-primary); }