/* ---------------------------------------------------------
   Tokens
--------------------------------------------------------- */
:root {
  --bg: #14161a;
  --surface: #1c1f24;
  --surface-hover: #21252b;
  --border: #2a2e35;
  --border-hover: #3a3f47;
  --text: #f2efe9;
  --text-muted: #9aa0aa;
  --text-faint: #5c626c;

  --accent-personal: #d98e4a;
  --accent-airtable: #4fa8a0;
  --accent-brandstak: #c1553a;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --container: 1160px;
}

* { box-sizing: border-box; }

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

ul { list-style: none; margin: 0; padding: 0; }

/* Subtle film-grain texture so the flat dark background doesn't feel bare */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%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");
}

/* ---------------------------------------------------------
   Masthead
--------------------------------------------------------- */
.masthead {
  position: relative;
  z-index: 2;
  padding: 6rem 1.5rem 4rem;
  border-bottom: 1px solid var(--border);
}

.masthead-inner {
  max-width: var(--container);
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 1rem;
}

.masthead h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
}

.tagline {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 40ch;
  margin: 0;
}

/* ---------------------------------------------------------
   Sections
--------------------------------------------------------- */
main {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.in-view {
  opacity: 1;
  transform: translateY(0);
}

.section:last-of-type { border-bottom: none; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.section-code {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.8125rem;
  width: 1.75rem;
  height: 1.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border-hover);
  color: var(--accent);
}

.section-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.375rem;
  margin: 0;
  letter-spacing: -0.01em;
}

.section-rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-count {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-faint);
}

.section-note {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin: 0 0 2rem 2.5rem;
}

.section[data-accent="personal"]   { --accent: var(--accent-personal); }
.section[data-accent="airtable"]   { --accent: var(--accent-airtable); }
.section[data-accent="brandstak"]  { --accent: var(--accent-brandstak); }

/* ---------------------------------------------------------
   Card grid
--------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  background: var(--surface-hover);
}

.card:hover::before { opacity: 1; }

.card a {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1.5rem 1.375rem 1.375rem 1.625rem;
  height: 100%;
}

.card a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.card-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  margin: 0.125rem 0 0;
  letter-spacing: -0.005em;
}

.card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
  flex: 1;
}

.card-domain {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-top: 0.5rem;
}

.card-arrow {
  position: absolute;
  right: 1.25rem;
  top: 1.375rem;
  color: var(--text-faint);
  transition: transform 0.2s ease, color 0.2s ease;
}

.card:hover .card-arrow {
  transform: translate(2px, -2px);
  color: var(--accent);
}

/* ---------------------------------------------------------
   Footer
--------------------------------------------------------- */
.site-footer {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
}

/* ---------------------------------------------------------
   Responsive
--------------------------------------------------------- */
@media (max-width: 640px) {
  .masthead { padding: 4rem 1.25rem 3rem; }
  main { padding: 0 1.25rem; }
  .section-note { margin-left: 0; }
  .card-grid { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------
   Reduced motion
--------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .section {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .card, .card-arrow {
    transition: none;
  }
}