@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ==========================================================================
   CSS DESIGN SYSTEM - ETHANEK EDTECH
   Design Direction: Technical education product, crisp, highly legible,
   clean white/off-white background with cobalt blue & slate accents.
   Includes automated/toggleable dark mode support.
   ========================================================================== */

:root {
  /* Color Palette - Light Mode (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #fbfdff;

  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #3b82f6;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Accent Colors */
  --cobalt-50: #eff6ff;
  --cobalt-100: #dbeafe;
  --cobalt-200: #bfdbfe;
  --cobalt-500: #3b82f6;
  --cobalt-600: #2563eb;
  --cobalt-700: #1d4ed8;
  --cobalt-800: #1e40af;

  --indigo-50: #eef2ff;
  --indigo-100: #e0e7ff;
  --indigo-600: #4f46e5;

  --emerald-50: #ecfdf5;
  --emerald-500: #10b981;
  --emerald-600: #059669;
  --emerald-700: #047857;

  --amber-50: #fffbeb;
  --amber-600: #d97706;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 25px -5px rgba(37, 99, 235, 0.15);

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-elevated: #1a2234;
  --bg-card: #131c2e;
  --bg-card-hover: #18233a;

  --border-light: #243048;
  --border-medium: #334366;
  --border-focus: #60a5fa;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --cobalt-50: #1e293b;
  --cobalt-100: #1e3a8a33;
  --cobalt-200: #2563eb44;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px -2px rgba(59, 130, 246, 0.25);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5.5rem 0;
  position: relative;
}

.section-tight {
  padding: 3.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: var(--cobalt-50);
  border: 1px solid var(--cobalt-200);
  color: var(--cobalt-700);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

[data-theme="dark"] .section-tag {
  color: var(--cobalt-500);
  background-color: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.25);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

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

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .site-nav {
  background-color: rgba(11, 15, 25, 0.88);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  background: linear-gradient(135deg, var(--cobalt-600), #4f46e5);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

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

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--cobalt-600);
}

[data-theme="dark"] .nav-link:hover {
  color: var(--cobalt-500);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.mobile-menu-btn {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
}

.mobile-nav-overlay,
.mobile-nav-drawer {
  display: none;
}

/* ==========================================================================
   BUTTONS & BADGES
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background-color: var(--cobalt-600);
  color: white;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  background-color: var(--cobalt-700);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.5rem 0.9rem;
  font-size: 0.875rem;
}

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

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

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--emerald-50);
  color: var(--emerald-700);
  border: 1px solid rgba(16, 185, 129, 0.25);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

[data-theme="dark"] .badge-live {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.badge-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--emerald-500);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

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

.hero-section {
  padding: 5rem 0 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero-bg-accent {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 450px;
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.12) 0%, rgba(99, 102, 241, 0.05) 50%, rgba(255, 255, 255, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

[data-theme="dark"] .hero-bg-accent {
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.22) 0%, rgba(99, 102, 241, 0.1) 50%, rgba(11, 15, 25, 0) 75%);
}

.hero-content {
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.hero-headline {
  font-size: clamp(2.5rem, 5vw, 3.85rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero-headline-highlight {
  background: linear-gradient(135deg, var(--cobalt-600) 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subheadline {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto 2.25rem auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-highlights-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  max-width: 920px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}

.hero-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  text-align: left;
}

.hero-highlight-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background-color: var(--cobalt-50);
  border: 1px solid var(--cobalt-200);
  color: var(--cobalt-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

[data-theme="dark"] .hero-highlight-icon {
  background-color: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
  color: var(--cobalt-500);
}

.hero-highlight-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.hero-highlight-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   PRODUCTS SHOWCASE (PATHMINDAI & PASSITAI)
   ========================================================================== */

.products-grid {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.product-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.product-card:hover {
  box-shadow: var(--shadow-xl);
}

.product-card-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  align-items: stretch;
}

.product-info-pane {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--border-light);
}

.product-meta-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.product-category-label {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cobalt-600);
}

[data-theme="dark"] .product-category-label {
  color: var(--cobalt-500);
}

.product-name {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.product-summary {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.product-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.product-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.product-feature-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--cobalt-600);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

[data-theme="dark"] .product-feature-icon {
  color: var(--cobalt-500);
}

.product-claude-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
}

.product-claude-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cobalt-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

[data-theme="dark"] .product-claude-label {
  color: var(--cobalt-500);
}

.product-claude-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.product-actions-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Product Interactive Preview Pane */
.product-preview-pane {
  background-color: var(--bg-secondary);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-mockup-window {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.mockup-window-header {
  padding: 0.75rem 1rem;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mockup-window-dots {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.mockup-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background-color: var(--border-medium);
}

.mockup-dot-red { background-color: #f87171; }
.mockup-dot-yellow { background-color: #fbbf24; }
.mockup-dot-green { background-color: #34d399; }

.mockup-window-url {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background-color: var(--bg-card);
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.mockup-window-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.mockup-notice-banner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.95rem;
  background-color: var(--amber-50);
  border-bottom: 1px solid rgba(217, 119, 6, 0.25);
  color: var(--amber-600);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
}

[data-theme="dark"] .mockup-notice-banner {
  background-color: rgba(217, 119, 6, 0.12);
  border-color: rgba(217, 119, 6, 0.3);
  color: #fbbf24;
}

.mockup-tabs-bar {
  display: flex;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-tertiary);
  padding: 0 0.75rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.mockup-tabs-bar::-webkit-scrollbar {
  display: none;
}

.mockup-tab-btn {
  padding: 0.65rem 0.95rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.mockup-tab-btn.active {
  color: var(--cobalt-600);
  font-weight: 700;
  border-bottom-color: var(--cobalt-600);
}

[data-theme="dark"] .mockup-tab-btn.active {
  color: var(--cobalt-500);
  border-bottom-color: var(--cobalt-500);
}

.mockup-window-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* UI Mockup Elements */
.ui-card-snippet {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.ui-snippet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.ui-snippet-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ui-snippet-status {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--cobalt-50);
  color: var(--cobalt-700);
}

[data-theme="dark"] .ui-snippet-status {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--cobalt-500);
}

.ui-feedback-box {
  background-color: var(--bg-card);
  border-left: 3px solid var(--cobalt-600);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.ui-metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.ui-metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.ui-metric-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.ui-metric-value {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 0.2rem;
}

/* ==========================================================================
   APPROACH & METHODOLOGY
   ========================================================================== */

.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.approach-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.approach-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-lg);
}

.approach-icon-wrap {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-md);
  background-color: var(--cobalt-50);
  border: 1px solid var(--cobalt-200);
  color: var(--cobalt-600);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

[data-theme="dark"] .approach-icon-wrap {
  background-color: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.2);
  color: var(--cobalt-500);
}

.approach-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.approach-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   TEAM & FOUNDER SECTION
   ========================================================================== */

.company-facts {
  margin-bottom: 3rem;
}

.team-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3rem;
  align-items: start;
}

.founder-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.founder-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.founder-avatar {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cobalt-600), #4f46e5);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  flex-shrink: 0;
}

.founder-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.founder-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--cobalt-600);
}

[data-theme="dark"] .founder-title {
  color: var(--cobalt-500);
}

.founder-bio {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.founder-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.social-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background-color: var(--bg-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.social-link-btn:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--cobalt-500);
  color: var(--cobalt-600);
  transform: translateY(-1px);
}

/* Team Roles Grid */
.team-roles-pane {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.team-roles-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.role-pill-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.role-pill-card:hover {
  transform: translateX(4px);
  border-color: var(--border-medium);
}

.role-icon-box {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background-color: var(--cobalt-50);
  color: var(--cobalt-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

[data-theme="dark"] .role-icon-box {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--cobalt-500);
}

.role-info-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.role-info-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */

.contact-box {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 4rem 2rem;
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
}

.contact-headline {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.contact-subtext {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem auto;
}

.contact-email-card {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.contact-email-text {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--cobalt-600);
}

[data-theme="dark"] .contact-email-text {
  color: var(--cobalt-500);
}

.copy-btn {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

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

.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: 4.5rem 0 2.5rem 0;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  max-width: 320px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link-item a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link-item a:hover {
  color: var(--cobalt-600);
}

[data-theme="dark"] .footer-link-item a:hover {
  color: var(--cobalt-500);
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* ==========================================================================
   LEGAL PAGES (PRIVACY & TERMS)
   ========================================================================== */

.legal-article {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.legal-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.legal-updated {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2.25rem 0 0.85rem 0;
  letter-spacing: -0.02em;
}

.legal-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.legal-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.legal-content li {
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   Thoroughly optimized for Desktop, Tablet (Portrait & Landscape),
   and Mobile (360px - 768px).
   ========================================================================== */

/* Tablet Landscape & Small Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .product-card-inner {
    grid-template-columns: 1fr;
  }

  .product-info-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding: 2.25rem;
  }

  .product-preview-pane {
    padding: 2rem;
  }

  .team-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .approach-card:last-child {
    grid-column: span 2;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }

  .hero-highlights-strip {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 1.25rem;
  }
}

/* Tablet Portrait & Large Phones (max-width: 768px) */
@media (max-width: 768px) {
  .container {
    padding: 0 1.25rem;
  }

  .section {
    padding: 4rem 0;
  }

  .section-tight {
    padding: 2.5rem 0;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }

  .section-title {
    font-size: 1.85rem;
  }

  /* Navigation on Tablet/Mobile */
  .nav-links, 
  .nav-actions .btn {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  /* Mobile Nav Overlay & Drawer */
  .mobile-nav-overlay {
    display: none;
    position: fixed;
    top: 4.5rem;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 98;
  }

  .mobile-nav-overlay.open {
    display: block;
  }

  .mobile-nav-drawer {
    display: block;
    position: fixed;
    top: 4.5rem;
    left: 0;
    right: 0;
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-light);
    padding: 1.5rem 1.25rem 2rem 1.25rem;
    box-shadow: var(--shadow-xl);
    z-index: 99;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .mobile-nav-drawer.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }

  .mobile-nav-links li a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
  }

  .mobile-nav-links li a:hover {
    background-color: var(--bg-secondary);
    color: var(--cobalt-600);
  }

  .mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-light);
  }

  .mobile-nav-actions .btn {
    display: flex;
    width: 100%;
    justify-content: center;
  }

  /* Hero adjustments */
  .hero-section {
    padding: 3.5rem 0 2.25rem 0;
  }

  .hero-headline {
    font-size: clamp(2rem, 7vw, 2.75rem);
    line-height: 1.18;
  }

  .hero-subheadline {
    font-size: 1.0625rem;
    margin-bottom: 2rem;
  }

  .hero-cta-group {
    margin-bottom: 2.75rem;
  }

  .hero-highlights-strip {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    padding: 1.25rem;
  }

  /* Product Showcase */
  .products-grid {
    gap: 2.75rem;
  }

  .product-info-pane {
    padding: 1.75rem 1.25rem;
  }

  .product-preview-pane {
    padding: 1.5rem 1rem;
  }

  .product-name {
    font-size: 1.65rem;
  }

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

  .product-actions-group .btn {
    width: 100%;
  }

  .mockup-window-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem;
  }

  .mockup-window-url {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
    text-align: center;
  }

  .mockup-window-body {
    padding: 1rem;
  }

  /* Approach & Methodology */
  .approach-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .approach-card:last-child {
    grid-column: span 1;
  }

  .approach-card {
    padding: 1.75rem 1.25rem;
  }

  /* Founder & Team */
  .founder-card {
    padding: 1.75rem 1.25rem;
  }

  .founder-avatar {
    width: 4.25rem;
    height: 4.25rem;
    font-size: 1.5rem;
  }

  .founder-links {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .founder-links .social-link-btn {
    width: 100%;
    justify-content: center;
  }

  .role-pill-card {
    padding: 1rem 1.15rem;
  }

  /* Contact Box */
  .contact-box {
    padding: 2.75rem 1.25rem;
  }

  .contact-headline {
    font-size: 1.85rem;
  }

  .contact-email-card {
    flex-direction: column;
    width: 100%;
    padding: 0.85rem 1rem;
  }

  .contact-email-text {
    font-size: 0.9375rem;
    word-break: break-all;
  }

  .contact-box .btn {
    width: 100%;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom-bar {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
  }

  .footer-legal-links {
    justify-content: center;
  }
}

/* Small Mobile Phones (max-width: 480px) */
@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-headline {
    font-size: 1.85rem;
  }

  .hero-subheadline {
    font-size: 0.975rem;
  }

  .hero-pill {
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    gap: 0.4rem;
  }

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

  .hero-cta-group .btn {
    width: 100%;
  }

  .ui-metric-row {
    grid-template-columns: 1fr;
  }

  .founder-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .mockup-tab-btn {
    padding: 0.5rem 0.65rem;
    font-size: 0.75rem;
  }

  .mockup-notice-banner {
    font-size: 0.7rem;
    padding: 0.45rem 0.65rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}