/* =============================================
   KART52 - Main Styles
   Glassmorphism Dark Theme
   ============================================= */

/* CSS Reset & Variables */
@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-dark: #0a0a0f;
  --bg-secondary: #13131a;
  --glass-surface: rgba(255, 255, 255, 0.03);
  --glass-surface-hover: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);

  --primary-red: #ef4444;
  --primary-red-hover: #dc2626;
  --primary-red-glow: rgba(239, 68, 68, 0.4);
  --accent-cyan: #06b6d4;
  --accent-cyan-hover: #0891b2;
  --accent-cyan-glow: rgba(6, 182, 212, 0.4);

  --gradient-primary: linear-gradient(135deg, #ef4444, #06b6d4);
  --gradient-red: linear-gradient(135deg, #ef4444, #f97316);
  --gradient-cyan: linear-gradient(135deg, #06b6d4, #3b82f6);

  --text-main: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow-red: 0 0 30px var(--primary-red-glow);
  --shadow-glow-cyan: 0 0 30px var(--accent-cyan-glow);

  /* Typography */
  --font-display: 'Rajdhani', sans-serif;
  --font-body: 'Inter', sans-serif;

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

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(239, 68, 68, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(255, 255, 255, 0.02) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

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

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

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

ul, ol {
  list-style: none;
}

/* Selection */
::selection {
  background: var(--primary-red);
  color: var(--text-main);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

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

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

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

/* Focus States */
:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.text-red { color: var(--primary-red); }
.text-cyan { color: var(--accent-cyan); }
.text-muted { color: var(--text-muted); }

.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;
}