/* Titan3D — Base resets, typography, layout helpers. */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: 'Inter', 'Geist Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-feature-settings: 'cv11', 'ss01', 'ss03';     /* Inter stylistic sets */
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Links --------------------------------------------------------- */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease);
}
a:hover { color: var(--accent-bright); }

/* Focus — visible ring on every interactive element ------------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex="0"]:focus-visible,
summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-md);
}

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

/* Typography ---------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: inherit;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.022em;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}
h1 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.028em; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.25rem); letter-spacing: -0.024em; }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.4rem); }
h4 { font-size: 1.05rem; font-weight: 600; }

p { margin: 0 0 var(--space-2); }
ul, ol { margin: 0 0 var(--space-2); padding-left: var(--space-3); }

strong, b { font-weight: 600; }

hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  margin: var(--space-4) 0;
}

code, kbd, pre, samp {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}

/* Containers ---------------------------------------------------- */
.t3d-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.t3d-container--narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.t3d-container--wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.t3d-main {
  min-height: 60vh;
  /* Longhand vertical only — preserves .t3d-container's horizontal padding
   * when both classes are applied to the same element (build-hub, my-account,
   * 404). Shorthand here would zero out left/right and clip content edge. */
  padding-top: var(--space-4);
  padding-bottom: var(--space-7);
  position: relative;
  z-index: var(--z-content);
}

/* A11y helpers -------------------------------------------------- */
.screen-reader-text {
  position: absolute !important;
  clip: rect(1px, 1px, 1px, 1px);
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.t3d-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: var(--z-toast);
  background: var(--accent);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: 600;
}
.t3d-skip-link:focus,
.t3d-skip-link:focus-visible { left: 0; color: #fff; }

/* Eyebrow / mono label -------------------------------------- */
.t3d-eyebrow {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}
.t3d-eyebrow--accent { color: var(--accent-bright); }

/* Gradient headings (hero use) -------------------------------- */
.t3d-h-gradient {
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.95) 50%, rgba(255, 255, 255, 0.70) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.t3d-h-accent {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-bright) 50%, var(--accent) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: t3d-shimmer 8s linear infinite;
}
@keyframes t3d-shimmer {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

/* Generic muted text ------------------------------------------ */
.t3d-muted { color: var(--text-muted); }
.t3d-subtle { color: var(--text-subtle); }

/* Section dividers -------------------------------------------- */
.t3d-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  border: 0;
  margin: var(--space-5) 0;
}