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

:root {
  /* Colors - HSL values */
  --bg-primary: 220 40% 6%;
  --text-primary: 210 40% 98%;
  --text-muted: 210 20% 65%;
  --primary: 270 75% 60%;
  --primary-rgb: 159, 122, 234;
  --secondary: 174 85% 35%;
  --secondary-rgb: 14, 165, 164;
  --accent: 38 92% 50%;
  --accent-rgb: 245, 158, 11;
  --card-bg: 220 35% 8%;
  --border: 220 30% 18%;
  --glass-bg: rgba(220, 226, 234, 0.06);
  --glass-border: rgba(210, 226, 240, 0.1);
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(var(--primary-rgb), 0.3);
  --shadow-glow-hover: 0 0 30px rgba(var(--primary-rgb), 0.5);
  /* Spacing */
  --container-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.4s ease;
  /* Motion durations */
  --duration-xxs: 120ms;
  --duration-xs: 180ms;
  --duration-s: 240ms;
  --duration-m: 360ms;
  --duration-l: 520ms;
  /* Easings */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-emph: cubic-bezier(0.18, 0.6, 0.2, 1);
  /* Navbar */
  --navbar-height: 80px;
}

body.light-theme {
  --bg-primary: 0 0% 100%;
  --text-primary: 0 0% 15%;
  --text-muted: 0 0% 50%;
  --card-bg: 0 0% 95%;
  --border: 0 0% 85%;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", sans-serif;
  color: hsl(var(--text-primary));
  background: radial-gradient(1200px 600px at 10% 10%, hsla(270, 75%, 60%, 0.15), transparent),
    radial-gradient(900px 500px at 90% 90%, hsla(174, 85%, 35%, 0.1), transparent), hsl(var(--bg-primary));
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: var(--navbar-height);
}

/* Custom scrollbar styling */
body::-webkit-scrollbar {
  width: 0px;
  background: transparent;
}

html {
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
}

section {
  scroll-margin-top: 100px;
}

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
}

@media (min-width: 1280px) {
  .container {
    padding: 0 4rem;
  }
}

/* Glass Effect */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: transform var(--duration-s) var(--ease-standard), box-shadow var(--duration-s) var(--ease-standard), border-color var(--duration-s) var(--ease-standard), background var(--duration-s) var(--ease-standard);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background var(--duration-xs) var(--ease-standard), color var(--duration-xs) var(--ease-standard), box-shadow var(--duration-s) var(--ease-standard), transform var(--duration-xs) var(--ease-standard);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: hsl(var(--primary));
  color: #000;
}

body.light-theme .btn-primary {
  color: #fff;
}

.btn-primary:hover {
  background: hsl(270 75% 55%);
  transform: translateY(-1px);
}