@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --bg-primary: #0A0F1F;
  --bg-secondary: #0D1426;
  --bg-tertiary: #111827;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --bg-glass: rgba(13, 20, 38, 0.7);

  --accent-green: #00FF9F;
  --accent-cyan: #00D4FF;
  --accent-pink: #FF006E;
  --accent-orange: #FF6B35;
  --accent-yellow: #FFD60A;

  --gradient-primary: linear-gradient(135deg, #00FF9F, #00D4FF);
  --gradient-secondary: linear-gradient(135deg, #FF006E, #FF6B35);
  --gradient-glow: linear-gradient(135deg, #00FF9F20, #00D4FF20);
  --gradient-hero: linear-gradient(135deg, #0A0F1F 0%, #0D1426 50%, #111827 100%);

  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.75);
  --text-muted: rgba(255, 255, 255, 0.45);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(0, 255, 159, 0.3);

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow-green: 0 0 40px rgba(0, 255, 159, 0.2);
  --shadow-glow-cyan: 0 0 40px rgba(0, 212, 255, 0.2);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --font-body: 'Inter', system-ui, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;

  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  --nav-height: 72px;

  --space-xs: 12px;
  --space-sm: 24px;
  --space-md: 40px;
  --space-lg: 60px;
  --space-xl: 96px;
  --space-2xl: 128px;
  --space-3xl: 180px;

  --container-max: 1280px;
  --container-pad: clamp(24px, 5vw, 72px);
}

[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --bg-tertiary: #E2E8F0;
  --bg-card: rgba(0, 0, 0, 0.03);
  --bg-card-hover: rgba(0, 0, 0, 0.06);
  --bg-glass: rgba(248, 250, 252, 0.8);
  --text-primary: #0A0F1F;
  --text-secondary: rgba(10, 15, 31, 0.7);
  --text-muted: rgba(10, 15, 31, 0.45);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.1);
}

*, *::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-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Fallback: show content without JS */
.animate-fade-up, .animate-fade-in {
  opacity: 1 !important;
  transform: none !important;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

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

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: clamp(1.4rem, 2.5vw, 1.875rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.375rem); }

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

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

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

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

@media (max-width: 480px) {
  .section {
    padding: var(--space-lg) 0;
  }
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-green);
  margin-bottom: var(--space-sm);
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-title {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-warm {
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

::selection {
  background: rgba(0, 255, 159, 0.25);
  color: var(--text-primary);
}

:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Preloader */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.preloader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.preloader-icon {
  width: 80px;
  height: 80px;
  animation: spin 2s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.preloader-bar {
  width: 200px;
  height: 3px;
  background: var(--border-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.preloader-progress {
  height: 100%;
  width: 0%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  animation: load 0.8s ease-out forwards;
}

@keyframes load {
  0% { width: 0%; }
  50% { width: 70%; }
  100% { width: 100%; }
}