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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(0, 229, 255, 0.09) 0%, transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(37, 99, 235, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 50% 60%, rgba(56, 189, 248, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 20% 85%, rgba(29, 78, 216, 0.1) 0%, transparent 45%);
  background-attachment: fixed;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #132240;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--cyan-primary);
}

/* Selection */
::selection {
  background: var(--cyan-primary);
  color: #060913;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 100px 0;
  position: relative;
  z-index: 2;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--cyan-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.section-tag.blue {
  background: rgba(37, 99, 235, 0.12);
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--blue-electric);
}

.section-tag.pink {
  background: rgba(255, 101, 132, 0.08);
  border-color: rgba(255, 101, 132, 0.3);
  color: var(--pink-accent);
}

.section-tag.purple {
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Gradients & Text Accents */
.text-gradient-cyan {
  background: linear-gradient(135deg, #FFFFFF 20%, var(--cyan-primary) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-blue {
  background: linear-gradient(135deg, #FFFFFF 15%, var(--blue-electric) 70%, var(--blue-primary) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-pink {
  background: linear-gradient(135deg, #FFFFFF 10%, var(--pink-accent) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-brand {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--cyan-primary) 50%, var(--blue-bright) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Ambient Background Spotlight Canvas */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

/* Interactive Cursor Glow (Follows mouse) */
.mouse-ambient-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 207, 255, 0.04) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 1;
  transition: opacity 0.3s ease;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-cyan);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6), var(--glow-cyan-sm);
  color: var(--text-primary);
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}