/* =============================================================
   BASE — reset, typography, global atmosphere
   ============================================================= */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ---------- Atmosphere: blueprint grid + glow + grain ---------- */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  overflow: hidden;
}

.atmosphere::before {
  /* blueprint grid */
  content: "";
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 40%, transparent 100%);
}

.atmosphere::after {
  /* grain */
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.atmosphere__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.55;
}

.atmosphere__glow--cyan {
  width: 46vw;
  height: 46vw;
  top: -14vw;
  right: -10vw;
  background: radial-gradient(circle, rgba(46, 230, 214, 0.28), transparent 70%);
}

.atmosphere__glow--amber {
  width: 38vw;
  height: 38vw;
  bottom: 8vh;
  left: -12vw;
  background: radial-gradient(circle, rgba(255, 180, 84, 0.18), transparent 70%);
}

.atmosphere__glow--violet {
  width: 32vw;
  height: 32vw;
  top: 45vh;
  right: 18vw;
  background: radial-gradient(circle, rgba(180, 139, 255, 0.14), transparent 70%);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  margin: 0;
  letter-spacing: 0.01em;
}

p {
  margin: 0;
  color: var(--color-text-muted);
}

a {
  color: var(--color-cyan);
  text-decoration: none;
}

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

ul, ol {
  margin: 0;
  padding: 0;
}

button {
  font-family: inherit;
}

/* ---------- Selection & scrollbar ---------- */
::selection {
  background: var(--color-cyan);
  color: var(--color-text-on-accent);
}

html {
  scrollbar-color: var(--color-cyan-dim) transparent;
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-surface-3);
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-cyan-dim);
}

/* ---------- Focus ---------- */
:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: var(--space-3) var(--space-5);
  background: var(--color-cyan);
  color: var(--color-text-on-accent);
  font-family: var(--font-mono);
  font-weight: 600;
  border-radius: 0 0 var(--radius-m) 0;
}

.skip-link:focus {
  left: 0;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

main {
  position: relative;
  z-index: var(--z-content);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Utility text styles ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-cyan);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  background: currentColor;
}

.text-muted { color: var(--color-text-muted); }
.text-dim { color: var(--color-text-dim); }
.text-cyan { color: var(--color-cyan); }
.text-amber { color: var(--color-amber); }

.font-mono { font-family: var(--font-mono); }

/* ---------- Image framing ---------- */
.media-frame {
  position: relative;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--color-surface);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(46, 230, 214, 0.08), transparent 55%);
  pointer-events: none;
}