/* ============================================================
   Silicoyote — shared stylesheet
   "Neon sign in a canyon at night": deep dark base,
   electric orange/amber + neon purple accents.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 8rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;

  /* Radii */
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem;
  --radius-xl: 1rem; --radius-2xl: 1.5rem; --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts */
  --font-display: 'Orbitron', 'Space Grotesk', sans-serif;
  --font-alt: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', 'Work Sans', system-ui, sans-serif;

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1240px;

  /* Brand accents (constant across themes) */
  --amber: #ff8a1e;
  --amber-bright: #ffab4d;
  --amber-deep: #e5620a;
  --purple: #a855f7;
  --purple-bright: #c084fc;
  --purple-deep: #7c3aed;
  --cyan: #34e0d4;
}

/* ---------- Dark mode (default aesthetic) ---------- */
:root, [data-theme='dark'] {
  --color-bg: #0a0710;
  --color-bg-2: #100b1a;
  --color-surface: #16101f;
  --color-surface-2: #1d1529;
  --color-surface-3: #251a35;
  --color-border: #33264a;
  --color-border-glow: #4a3568;
  --color-text: #ede8f5;
  --color-text-muted: #a99fc0;
  --color-text-faint: #6f6588;
  --color-text-inverse: #0a0710;

  --color-primary: var(--amber);
  --color-primary-hover: var(--amber-bright);
  --color-accent: var(--purple);
  --color-accent-hover: var(--purple-bright);

  --glow-amber: 0 0 24px rgba(255, 138, 30, 0.45);
  --glow-purple: 0 0 24px rgba(168, 85, 247, 0.45);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);

  --hero-star-opacity: 1;
  --grid-line: rgba(168, 85, 247, 0.06);
}

/* ---------- Light mode ---------- */
[data-theme='light'] {
  --color-bg: #f6f2fb;
  --color-bg-2: #efe8f8;
  --color-surface: #ffffff;
  --color-surface-2: #f4eefb;
  --color-surface-3: #ece2f8;
  --color-border: #ddd0ee;
  --color-border-glow: #c9b4e6;
  --color-text: #1c1230;
  --color-text-muted: #5f5478;
  --color-text-faint: #928aa6;
  --color-text-inverse: #ffffff;

  --color-primary: var(--amber-deep);
  --color-primary-hover: #c9540a;
  --color-accent: var(--purple-deep);
  --color-accent-hover: #6d28d9;

  --glow-amber: 0 0 20px rgba(229, 98, 10, 0.22);
  --glow-purple: 0 0 20px rgba(124, 58, 237, 0.2);
  --shadow-lg: 0 24px 60px rgba(80, 50, 130, 0.16);
  --shadow-md: 0 12px 28px rgba(80, 50, 130, 0.12);

  --hero-star-opacity: 0.35;
  --grid-line: rgba(124, 58, 237, 0.05);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f6f2fb; --color-bg-2: #efe8f8; --color-surface: #ffffff;
    --color-surface-2: #f4eefb; --color-surface-3: #ece2f8;
    --color-border: #ddd0ee; --color-border-glow: #c9b4e6;
    --color-text: #1c1230; --color-text-muted: #5f5478;
    --color-text-faint: #928aa6; --color-text-inverse: #ffffff;
    --color-primary: var(--amber-deep); --color-primary-hover: #c9540a;
    --color-accent: var(--purple-deep); --color-accent-hover: #6d28d9;
    --glow-amber: 0 0 20px rgba(229, 98, 10, 0.22);
    --glow-purple: 0 0 20px rgba(124, 58, 237, 0.2);
    --hero-star-opacity: 0.35; --grid-line: rgba(124, 58, 237, 0.05);
  }
}

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

html {
  -webkit-text-size-adjust: none; text-size-adjust: none;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  transition: background-color 400ms ease, color 400ms ease;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.1; }
p, li { text-wrap: pretty; }

a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; }

::selection { background: rgba(255, 138, 30, 0.3); color: var(--color-text); }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a, button, [role='button'] {
  transition: color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

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

@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;
  }
}

/* ============================================================
   Layout helpers
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 5vw, var(--space-12));
}
.container--narrow { max-width: var(--content-default); }

.section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }

.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-alt);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.eyebrow::before {
  content: ''; width: 22px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary));
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: var(--space-4);
}
.section-lead {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 60ch;
  margin-top: var(--space-4);
}

.gradient-text {
  background: linear-gradient(100deg, var(--amber-bright), var(--amber) 35%, var(--purple-bright) 90%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-alt);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  color: #1a0f00;
  background: linear-gradient(100deg, var(--amber-bright), var(--amber-deep));
  box-shadow: var(--glow-amber);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 0 34px rgba(255, 138, 30, 0.6); }
.btn--ghost {
  color: var(--color-text);
  border-color: var(--color-border-glow);
  background: color-mix(in oklab, var(--color-surface) 60%, transparent);
}
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent-hover); transform: translateY(-2px); }

/* ============================================================
   Header / Nav
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--color-bg) 78%, transparent);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}
.brand { display: inline-flex; align-items: center; gap: var(--space-3); }
.brand__mark { color: var(--color-primary); filter: drop-shadow(0 0 8px rgba(255,138,30,0.4)); }
.brand__name {
  font-family: var(--font-display);
  font-weight: 700; font-size: var(--text-lg);
  letter-spacing: 0.02em;
}
.brand__name b { color: var(--color-primary); font-weight: 700; }

.nav__links { display: flex; align-items: center; gap: var(--space-6); }
.nav__link {
  font-family: var(--font-alt);
  font-size: var(--text-sm); font-weight: 500;
  color: var(--color-text-muted);
}
.nav__link:hover { color: var(--color-text); }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.icon-btn:hover { color: var(--color-primary); border-color: var(--color-border-glow); }

@media (max-width: 720px) {
  .nav__links .nav__link { display: none; }
}

/* ============================================================
   Hero (shared skeleton, page-specific colors)
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(120% 80% at 80% -10%, rgba(168,85,247,0.28), transparent 55%),
    radial-gradient(100% 70% at 10% 0%, rgba(255,138,30,0.22), transparent 50%),
    linear-gradient(180deg, var(--color-bg-2), var(--color-bg));
}
.hero__grid {
  position: absolute; inset: 0; z-index: -2;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
}
#starfield {
  position: absolute; inset: 0; z-index: -1;
  opacity: var(--hero-star-opacity);
  pointer-events: none;
}

/* ============================================================
   Cards / surfaces
   ============================================================ */
.card {
  background: color-mix(in oklab, var(--color-surface) 92%, transparent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
}

.panel-glow {
  position: relative;
}
.panel-glow::before {
  content: ''; position: absolute; inset: -1px; z-index: -1;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(255,138,30,0.5), rgba(168,85,247,0.5));
  opacity: 0; transition: opacity var(--transition-interactive);
}
.panel-glow:hover::before { opacity: 0.7; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-2);
  padding-block: var(--space-12);
}
.site-footer .container {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  align-items: center; justify-content: space-between;
}
.footer__meta {
  color: var(--color-text-faint);
  font-size: var(--text-sm);
  font-family: var(--font-alt);
}
.footer__meta a { color: var(--color-primary); }
.footer__meta a:hover { color: var(--color-primary-hover); }

/* ============================================================
   Reveal-on-scroll
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms ease, transform 700ms cubic-bezier(0.16,1,0.3,1); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }