/* CSS VARIABLES AND THEME DEFINITIONS */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* Font Families */
  --font-title: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  /* Theme Transitions */
  --transition-theme: background-color 0.5s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.12);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.2);

  /* Dark Theme Variables */
  --bg-primary: #0b0f19;        /* Slate 950 / Deep blackish blue */
  --bg-secondary: #111827;      /* Slate 900 */
  --bg-tertiary: #1f2937;       /* Slate 800 */
  --bg-glass: rgba(17, 24, 39, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.1);

  --text-primary: #f9fafb;      /* Slate 50 */
  --text-secondary: #d1d5db;    /* Slate 300 */
  --text-muted: #9ca3af;        /* Slate 400 */
  --text-inverse: #0b0f19;

  --color-primary: #f3f4f6;     /* White/Light Grey for text contrast */
  --color-primary-hover: #ffffff;
  --color-primary-light: rgba(255, 255, 255, 0.1);
  --color-accent: #9ca3af;      /* Light slate grey */
  --color-accent-light: rgba(156, 163, 175, 0.1);

  --selection-bg: rgba(255, 255, 255, 0.15);
  --selection-text: #ffffff;
}

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

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Selection */
::selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  transition: var(--transition-theme);
}

h1 {
  font-size: 2.75rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  color: var(--text-secondary);
  transition: var(--transition-theme);
  margin-bottom: 1rem;
}

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

a:hover {
  color: var(--color-primary-hover);
}

ul, ol {
  list-style: none;
}

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

/* LAYOUT CONTAINER */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding-top: 100px;
  padding-bottom: 100px;
  position: relative;
}

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

.section-tertiary {
  background-color: var(--bg-tertiary);
}

/* HELPER CLASSES */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.flex { display: flex; }
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid {
  display: grid;
  gap: 30px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Responsive Grid Helpers */
@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}