/* ==========================================================================
   BASE STYLES, TYPOGRAPHY & UTILITIES
   ========================================================================== */

/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

html[data-theme="light"] {
  color-scheme: light;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Ambient Radial Mesh Glows Fixed in Background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(75vw 60vh at 85% -5%, rgba(6, 182, 212, 0.12), transparent 70%),
    radial-gradient(65vw 55vh at 10% 25%, rgba(20, 184, 166, 0.10), transparent 65%),
    radial-gradient(60vw 60vh at 90% 80%, rgba(129, 140, 248, 0.10), transparent 70%),
    linear-gradient(rgba(20, 184, 166, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 184, 166, 0.03) 1px, transparent 1px);
  background-size: auto, auto, auto, 48px 48px, 48px 48px;
  opacity: 0.9;
}

html[data-theme="light"] body::before {
  background: 
    radial-gradient(75vw 60vh at 85% -5%, rgba(6, 182, 212, 0.08), transparent 70%),
    radial-gradient(65vw 55vh at 10% 25%, rgba(13, 148, 136, 0.06), transparent 65%),
    radial-gradient(60vw 60vh at 90% 80%, rgba(99, 102, 241, 0.06), transparent 70%),
    linear-gradient(rgba(13, 148, 136, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 148, 136, 0.03) 1px, transparent 1px);
  background-size: auto, auto, auto, 48px 48px, 48px 48px;
  opacity: 0.8;
}

/* Subtle Film Grain Texture */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  font-size: 1rem;
}

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

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

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

::selection {
  background: var(--teal-primary);
  color: #FFFFFF;
}

/* Container & Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  position: relative;
  z-index: 2;
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  position: relative;
  z-index: 2;
}

section {
  padding-top: clamp(4.5rem, 8vw, 8rem);
  padding-bottom: clamp(4.5rem, 8vw, 8rem);
  position: relative;
  z-index: 1;
}

/* Header & Section Eyebrows */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--teal-primary);
  border-radius: var(--radius-full);
}

.section-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.section-title em {
  font-style: normal;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.6;
}

/* Scroll Progress Bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3.5px;
  width: 0%;
  background: var(--grad-primary);
  z-index: 1000;
  box-shadow: 0 0 12px rgba(20, 184, 166, 0.6);
  transition: width 0.1s linear;
}

/* Custom Interactive Cursor & Magnetic Ring */
.custom-cursor-dot {
  width: 8px;
  height: 8px;
  background: var(--teal-primary);
  border-radius: 50%;
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.2s ease, transform 0.1s ease;
  box-shadow: 0 0 10px var(--teal-glow);
}

.custom-cursor-ring {
  width: 38px;
  height: 38px;
  border: 1.5px solid rgba(20, 184, 166, 0.5);
  border-radius: 50%;
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.25s var(--ease-smooth), height 0.25s var(--ease-smooth), background-color 0.25s var(--ease-smooth), border-color 0.25s;
}

body.cursor-hovering .custom-cursor-ring {
  width: 64px;
  height: 64px;
  background-color: rgba(20, 184, 166, 0.12);
  border-color: var(--teal-glow);
}

body.cursor-clicking .custom-cursor-ring {
  transform: translate(-50%, -50%) scale(0.85);
  background-color: rgba(20, 184, 166, 0.25);
}

@media (hover: none) or (pointer: coarse) {
  .custom-cursor-dot,
  .custom-cursor-ring {
    display: none !important;
  }
}

/* Scroll Reveal Animations */
.reveal-item {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s var(--ease-elastic), transform 0.75s var(--ease-elastic);
  will-change: opacity, transform;
}

.reveal-item.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Focus Visible for Accessibility */
:focus-visible {
  outline: 2px solid var(--teal-primary);
  outline-offset: 3px;
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal-item {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .custom-cursor-dot,
  .custom-cursor-ring {
    display: none !important;
  }
}