/* ==========================================================================
   Studio Six — Base & Reset Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  font-synthesis: none;
  background-color: var(--bg-base);
  color: var(--text-primary);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-secondary);
  background-color: var(--bg-base);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Tactile Filmic Grain Atmosphere (3% opacity, GPU composited) */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 900;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  transform: translateZ(0);
  will-change: transform;
}

/* Browser Surface Theming */
::selection {
  background-color: var(--accent-primary);
  color: #ffffff;
}

::-moz-selection {
  background-color: var(--accent-primary);
  color: #ffffff;
}

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

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

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(85, 72, 242, 0.6);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 700;
  text-wrap: balance;
}

p {
  max-width: 70ch;
  margin-bottom: var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* Accessible Focus States */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

/* Section Common Layout */
.section {
  position: relative;
  padding-block: clamp(5rem, 10vw, 9rem);
  z-index: var(--z-content);
}

.section-header {
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: var(--space-md);
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
}

.section-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Custom Kinetic Cursor (Desktop Only, GPU Composited) */
.custom-cursor-dot,
.custom-cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  border-radius: 50%;
  z-index: var(--z-cursor);
  opacity: 0;
  will-change: transform;
  transform: translate3d(-100px, -100px, 0) translate(-50%, -50%);
  transition: opacity var(--transition-normal);
}

.custom-cursor-dot {
  width: 6px;
  height: 6px;
  background-color: #ffffff;
}

.custom-cursor-ring {
  width: 38px;
  height: 38px;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  transition: width var(--transition-fast), height var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.custom-cursor-ring.is-hovered {
  width: 54px;
  height: 54px;
  border-color: var(--accent-cyan);
  background-color: rgba(0, 210, 240, 0.08);
}

/* Touch & Mobile Fallback for Cursor */
@media (hover: none) and (pointer: coarse) {
  .custom-cursor-dot,
  .custom-cursor-ring {
    display: none !important;
  }
}

/* Reduced Motion Support */
@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;
  }
  .custom-cursor-dot,
  .custom-cursor-ring {
    display: none !important;
  }
}