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

:root {
  /* Colors */
  --color-surface: #f8f9ff;
  --color-surface-dim: #cbdbf5;
  --color-surface-bright: #f8f9ff;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #eff4ff;
  --color-surface-container: #e5eeff;
  --color-surface-container-high: #dce9ff;
  --color-surface-container-highest: #d3e4fe;
  
  --color-on-surface: #0b1c30;
  --color-on-surface-variant: #44474d;
  --color-inverse-surface: #213145;
  --color-inverse-on-surface: #eaf1ff;
  
  --color-outline: #75777e;
  --color-outline-variant: #c5c6ce;
  --color-surface-tint: #505e7c;
  
  --color-primary-base: #0B1B35;
  --color-secondary-base: #F58220;
  --color-tertiary-base: #00CCFF;

  --color-primary: #0b1b35; /* Midnight Navy */
  --color-on-primary: #ffffff;
  --color-primary-container: #0b1b35;
  --color-on-primary-container: #7584a3;
  --color-inverse-primary: #b8c7e9;
  
  --color-secondary: #f58220; /* Energetic Orange */
  --color-on-secondary: #ffffff;
  --color-secondary-container: #ff8928;
  --color-on-secondary-container: #642f00;
  
  --color-tertiary: #00ccff; /* Tech Cyan */
  --color-on-tertiary: #ffffff;
  --color-tertiary-container: #001f29;
  --color-on-tertiary-container: #008fb4;
  
  --color-error: #ba1a1a;
  --color-on-error: #ffffff;
  --color-error-container: #ffdad6;
  --color-on-error-container: #93000a;
  
  --color-background: #ffffff;
  --color-on-background: #0b1c30;
  
  /* Levels & Elevation */
  --bg-level-0: #ffffff;
  --bg-level-1: #f8fafc;
  --border-level-1: #e2e8f0;
  --shadow-level-2: 0 10px 25px -5px rgba(11, 27, 53, 0.1);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Manrope', sans-serif;
  --font-code: monospace;

  /* Rounded */
  --rounded-sm: 0.125rem;
  --rounded-default: 0.25rem; /* 4px */
  --rounded-md: 0.375rem;
  --rounded-lg: 0.5rem; /* 8px */
  --rounded-xl: 0.75rem;
  --rounded-full: 9999px;

  /* Spacing */
  --spacing-base: 8px;
  --spacing-xs: 4px;
  --spacing-sm: 12px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  --container-max: 1200px;
  --gutter: 24px;
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  color: var(--color-on-surface);
  background-color: var(--color-background);
  line-height: 1.6;
  font-size: 18px; /* body-lg */
  -webkit-font-smoothing: antialiased;
}

/* Typography Utility Classes */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.display {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.headline-lg {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.2;
}

.headline-md {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
}

.body-lg {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
}

.body-md {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
}

.label-md {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.text-cyan {
    color: var(--color-tertiary);
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}

.col-12 { grid-column: span 12; }
.col-8 { grid-column: 3 / span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }

@media (max-width: 768px) {
  .col-8, .col-6, .col-4 {
    grid-column: span 12;
  }
}

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

.section-dark {
  background-color: var(--color-primary-base);
  color: var(--color-surface-bright);
}
.section-dark h1, .section-dark h2, .section-dark h3 {
    color: var(--color-surface-bright);
}

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

/* Components */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 var(--spacing-md);
  border-radius: var(--rounded-default);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-container);
  box-shadow: var(--shadow-level-2);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-on-secondary);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-container);
  box-shadow: var(--shadow-level-2);
}

/* Cards */
.card {
  background-color: var(--bg-level-1);
  border: 1px solid var(--border-level-1);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-level-2);
}

/* Chips & Tags */
.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(0, 204, 255, 0.1); /* Light tint of cyan */
  color: var(--color-primary);
  border-radius: var(--rounded-default);
  font-size: 14px;
  font-weight: 600;
}

/* Input Fields */
.input-group {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-md);
}

.input-label {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-on-surface-variant);
}

.input-field {
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--border-level-1);
  border-radius: var(--rounded-default);
  padding: var(--spacing-sm);
  font-family: var(--font-body);
  font-size: 16px;
  outline: none;
  transition: all 0.2s ease;
}

.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 204, 255, 0.5); /* cyan glow */
}

/* Code Snippets */
.code-block {
  background-color: var(--color-primary);
  color: var(--color-surface-bright);
  font-family: var(--font-code);
  font-size: 14px;
  padding: var(--spacing-md);
  border-radius: var(--rounded-lg);
  overflow-x: auto;
}

.code-keyword { color: var(--color-tertiary); }
.code-string { color: var(--color-secondary); }

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-level-1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-link {
  color: var(--color-on-surface-variant);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

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

/* Hero Section */
.hero {
  padding-top: calc(80px + var(--spacing-xl));
  padding-bottom: var(--spacing-xl);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: var(--color-surface-bright);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

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