/* ==========================================
   iSNEPS DESIGN SYSTEM
   Teal-accent differentiation from Anubis's gold
   ========================================== */

:root {
  /* Backgrounds - Blue-black progression */
  --bg-primary: #0a0f14;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-elevated: #283548;
  --bg-hover: #374151;

  /* Primary Accent - Teal */
  --accent-primary: #0891b2;
  --accent-primary-bright: #06b6d4;
  --accent-primary-dim: #0e7490;
  
  /* Secondary Accent - Amber (for highlights) */
  --accent-secondary: #f59e0b;
  --accent-secondary-bright: #fbbf24;

  /* Text Colors */
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-accent: var(--accent-primary-bright);

  /* Borders */
  --border-subtle: rgba(8, 145, 178, 0.15);
  --border-medium: rgba(8, 145, 178, 0.3);
  --border-bright: rgba(8, 145, 178, 0.5);

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(8, 145, 178, 0.2);
  --shadow-glow-strong: 0 0 40px rgba(8, 145, 178, 0.3);

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

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Container */
  --container-max: 1200px;
}

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

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  height: auto;
}

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

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled,
.btn-disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-dim));
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--accent-primary-bright), var(--accent-primary));
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-medium);
}

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

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

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: 1rem;
}

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

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  background: transparent;
  transition: all var(--transition-normal);
}

.nav.scrolled {
  background: rgba(10, 15, 20, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.logo-icon {
  font-size: 1.5rem;
  color: var(--accent-primary-bright);
  filter: drop-shadow(0 0 8px rgba(8, 145, 178, 0.5));
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--accent-primary-bright);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  flex-direction: column;
  gap: var(--spacing-md);
  border-bottom: 1px solid var(--border-subtle);
  transform: translateY(-100%);
  opacity: 0;
  transition: all var(--transition-normal);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-link {
  padding: var(--spacing-md);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
}

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .mobile-menu {
    display: flex;
  }
}

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

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--spacing-3xl) * 2) var(--spacing-lg);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(8, 145, 178, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 145, 178, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-visual {
  display: none;
  /* Future: animated data flow visualization */
}

/* ==========================================
   SECTIONS
   ========================================== */

section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================
   PRODUCTS SECTION
   ========================================== */

.products {
  background: var(--bg-secondary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.product-card {
  position: relative;
  padding: var(--spacing-xl);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

.product-card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-lg);
}

.product-active {
  border-color: var(--accent-primary);
}

.product-active:hover {
  box-shadow: var(--shadow-glow-strong);
}

.product-coming-soon {
  opacity: 0.7;
}

.product-coming-soon .product-icon,
.product-coming-soon .product-title,
.product-coming-soon .product-features {
  opacity: 0.6;
}

.product-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  color: var(--accent-primary-bright);
  margin-bottom: var(--spacing-lg);
}

.product-active .product-icon {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-dim));
  color: white;
  box-shadow: var(--shadow-glow);
}

.product-badge {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--accent-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-soon {
  background: var(--bg-tertiary);
  color: var(--text-muted);
}

.product-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-xs);
}

.product-tagline {
  font-size: 1rem;
  color: var(--accent-primary-bright);
  margin-bottom: var(--spacing-md);
}

.product-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.product-features {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.product-features li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-primary-bright);
}

.product-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* ==========================================
   FEATURES SECTION
   ========================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  padding: var(--spacing-xl);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-4px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--accent-primary-bright);
  margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ==========================================
   API SECTION
   ========================================== */

.api-section {
  background: var(--bg-secondary);
}

.api-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

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

.api-text h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.api-text p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.api-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.api-tag {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-full);
}

.api-code {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-subtle);
}

.code-dot {
  width: 12px;
  height: 12px;
  background: var(--bg-hover);
  border-radius: 50%;
}

.code-title {
  margin-left: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.api-code pre {
  padding: var(--spacing-lg);
  overflow-x: auto;
}

.api-code code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.code-keyword {
  color: #c792ea;
}

.code-string {
  color: #c3e88d;
}

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

.footer {
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  border-top: 1px solid var(--border-subtle);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

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

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.footer-links h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  display: block;
  padding: var(--spacing-xs) 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  color: var(--text-muted);
}

@media (max-width: 480px) {
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}

.footer-credit {
  color: var(--text-muted);
}

/* ==========================================
   ANIMATIONS
   ========================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

.product-card,
.feature-card {
  animation: fadeInUp 0.6s ease-out;
  animation-fill-mode: both;
}

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.15s; }
.feature-card:nth-child(3) { animation-delay: 0.2s; }
.feature-card:nth-child(4) { animation-delay: 0.25s; }
.feature-card:nth-child(5) { animation-delay: 0.3s; }
.feature-card:nth-child(6) { animation-delay: 0.35s; }