/* =============================================================================
   VizaAI — Base Styles, CSS Reset & Utilities (main.css)
   ============================================================================= */

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

/* ── 1. CSS Reset ── */
*, *::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-dark);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--lh-normal);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video, canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

ul, ol {
  list-style: none;
}

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

/* ── 2. Custom Scrollbar (Dark Mode) ── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-dark);
}

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

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--bg-surface) var(--bg-dark);
}

/* ── 3. Typography & Headings ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--text-4xl); letter-spacing: -0.025em; }
h2 { font-size: var(--text-3xl); letter-spacing: -0.02em; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

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

/* ── 4. Keyframe Animations ── */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes bounceDot {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

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

/* ── 5. Utility Classes ── */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-accent {
  color: var(--accent);
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

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

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

.flex-col {
  display: flex;
  flex-direction: column;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.hidden {
  display: none !important;
}

.animate-fade-in {
  animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}