/* Neon Media — Brand Guidelines shared styles */

:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --muted: #6b6b6b;
  --line: #e6e6e6;
  --subtle: #f6f6f6;
  --accent: #0a0a0a;
  --accent-ink: #ffffff;

  --font-display: "Inter Tight", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1440px;
  --gutter: 32px;
  --radius: 8px;
}

[data-mode="dark"] {
  --bg: #0a0a0a;
  --fg: #f5f5f5;
  --muted: #9a9a9a;
  --line: #1f1f1f;
  --subtle: #141414;
  --accent: #ffffff;
  --accent-ink: #0a0a0a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .25s ease, color .25s ease;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

/* ——— Top chrome ——— */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 18px var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  position: relative;
}
.topbar .brandmark {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; font-size: 18px;
  white-space: nowrap;
}
.topbar .brandmark .logo,
.footer-logo .logo {
  height: 60px; width: auto; display: block;
}
.topbar .brandmark .logo-light,
.footer-logo .logo-light { display: none; }
[data-mode="dark"] .topbar .brandmark .logo-dark,
[data-mode="dark"] .footer-logo .logo-dark { display: none; }
[data-mode="dark"] .topbar .brandmark .logo-light,
[data-mode="dark"] .footer-logo .logo-light { display: block; }
.topbar nav { display: flex; gap: 2px; flex-wrap: wrap; }
.topbar nav a {
  padding: 8px 14px; border-radius: 999px; font-size: 13.5px; color: var(--muted);
  letter-spacing: -0.01em;
  transition: color .18s ease, background .18s ease;
}
.topbar nav a.active { background: var(--fg); color: var(--bg); }
.topbar nav a:hover:not(.active) { color: var(--fg); }
.mobile-nav-cta,
.menu-toggle { display: none; }
.menu-toggle {
  width: 42px; height: 42px; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; color: var(--fg);
  cursor: pointer; padding: 0; align-items: center; justify-content: center;
  position: relative; transition: border-color .18s ease, background .18s ease, transform .16s ease;
}
.menu-toggle:hover { border-color: var(--fg); }
.menu-toggle:active { transform: scale(.94); }
.menu-toggle span {
  position: absolute; width: 17px; height: 1.5px; border-radius: 999px;
  background: currentColor; transition: transform .28s cubic-bezier(.16,1,.3,1), opacity .18s ease;
}
.menu-toggle span:first-child { transform: translateY(-4px); }
.menu-toggle span:last-child { transform: translateY(4px); }
.topbar.is-menu-open .menu-toggle span:first-child { transform: rotate(45deg); }
.topbar.is-menu-open .menu-toggle span:last-child { transform: rotate(-45deg); }

.topbar .meta {
  display: flex; gap: 14px; align-items: center; font-family: var(--font-mono);
  font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em;
}

/* ——— Layout ——— */
.page {
  max-width: var(--maxw); margin: 0 auto; padding: 88px var(--gutter) 152px;
}
.eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted);
  display: inline-flex; gap: 10px; align-items: center;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px; background: currentColor; display: inline-block;
}
.display {
  font-family: var(--font-display); font-weight: 600; letter-spacing: -0.035em;
  font-size: clamp(48px, 8vw, 112px); line-height: 0.96; margin: 18px 0 0;
  text-wrap: balance;
}
.lede {
  font-size: clamp(17px, 1.3vw, 21px); color: var(--muted); max-width: 58ch;
  margin: 28px 0 0; text-wrap: pretty;
}

/* Section */
.section { border-top: 1px solid var(--line); margin-top: 132px; padding-top: 84px; }
.section-head {
  display: grid; grid-template-columns: 1fr; gap: 20px; align-items: baseline;
  margin-bottom: 56px;
}
.section-head .idx { display: none; }
.section-head h2 {
  font-family: var(--font-display); font-weight: 600; letter-spacing: -0.028em;
  font-size: clamp(28px, 3.5vw, 44px); line-height: 1.05; margin: 0;
}
.section-head p { grid-column: 1; color: var(--muted); max-width: 72ch; margin: 6px 0 0; }

/* Grid tools */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section-head { grid-template-columns: 1fr; }
  .section-head p { grid-column: 1; }
  .topbar-inner { flex-wrap: wrap; }
}

/* Card */
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; background: var(--bg);
}
.card.flush { padding: 0; overflow: hidden; }
.card .body { padding: 22px; }
.card .label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted);
}

/* Caption */
.cap {
  font-family: var(--font-mono); font-size: 11px; color: var(--muted);
  letter-spacing: .08em; text-transform: uppercase;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  margin-top: 0; padding: 44px var(--gutter);
  max-width: var(--maxw); margin-left: auto; margin-right: auto;
  display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
}
.footer-logo {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--fg); font-family: var(--font-display); font-weight: 700;
  font-size: 18px; letter-spacing: -0.02em; text-transform: none;
}
.footer-logo .logo { height: 34px; }
.footer-contact {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.footer-contact a {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 3px;
}

[data-reveal] { opacity: 1; }

/* Tweaks panel */
.tweaks {
  position: fixed; right: 20px; bottom: 20px; z-index: 50;
  width: 300px; border: 1px solid var(--line); border-radius: 14px;
  background: var(--bg); color: var(--fg);
  box-shadow: 0 10px 40px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
  display: none; overflow: hidden;
}
.tweaks.open { display: block; }
.tweaks header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; border-bottom: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.tweaks .row { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.tweaks .row:last-child { border-bottom: 0; }
.tweaks .row > label {
  display: block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}
.swatches, .choices { display: flex; gap: 6px; flex-wrap: wrap; }
.swatches button {
  width: 26px; height: 26px; border-radius: 999px; border: 1px solid var(--line);
  cursor: pointer; padding: 0;
}
.swatches button[aria-pressed="true"] { outline: 2px solid var(--fg); outline-offset: 2px; }
.choices button {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  padding: 7px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg); color: var(--fg); cursor: pointer;
}
.choices button[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg); }

/* Utility */
.rule { height: 1px; background: var(--line); margin: 40px 0; }
.kbd {
  font-family: var(--font-mono); font-size: 11px;
  padding: 2px 6px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted);
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }

  body.is-menu-locked {
    overflow: hidden;
  }
  .topbar {
    z-index: 80;
  }
  .topbar-inner {
    padding: 14px var(--gutter);
    gap: 12px;
    align-items: center;
    z-index: 2;
  }
  .topbar .brandmark {
    flex: 1 1 auto;
    min-width: 0;
  }
  .topbar .brandmark,
  .menu-toggle,
  .topbar-actions,
  .topbar .meta {
    position: relative;
    z-index: 3;
  }
  .menu-toggle {
    display: inline-flex;
    order: 3;
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 0;
    background: transparent;
  }
  .menu-toggle:hover { border-color: transparent; }
  .topbar nav {
    order: 4;
    position: fixed;
    inset: 0;
    z-index: 1;
    width: auto;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    opacity: 0;
    visibility: hidden;
    overflow: auto;
    padding: 96px var(--gutter) 32px;
    pointer-events: none;
    transform: translateY(-12px);
    transform-origin: top center;
    background: color-mix(in oklab, var(--bg) 95%, transparent);
    border: 0;
    border-radius: 0;
    box-shadow: none;
    backdrop-filter: saturate(145%) blur(16px);
    -webkit-backdrop-filter: saturate(145%) blur(16px);
    transition:
      opacity .22s ease,
      transform .36s cubic-bezier(.16,1,.3,1),
      visibility 0s linear .36s;
  }
  .topbar nav a {
    width: 100%;
    padding: 14px 0;
    border-radius: 0;
    border-bottom: 1px solid color-mix(in oklab, var(--line) 72%, transparent);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(36px, 12vw, 58px);
    line-height: 1;
    letter-spacing: -0.035em;
    color: var(--fg);
    opacity: 0;
    transform: translateY(10px);
    transition: color .18s ease, opacity .24s ease, transform .34s cubic-bezier(.16,1,.3,1);
  }
  .topbar.is-menu-open nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition:
      opacity .22s ease,
      transform .36s cubic-bezier(.16,1,.3,1),
      visibility 0s;
  }
  .topbar.is-menu-open nav a {
    opacity: 1;
    transform: none;
  }
  .topbar.is-menu-open nav a:nth-child(1) { transition-delay: 40ms; }
  .topbar.is-menu-open nav a:nth-child(2) { transition-delay: 70ms; }
  .topbar.is-menu-open nav a:nth-child(3) { transition-delay: 100ms; }
  .topbar.is-menu-open nav a:nth-child(4) { transition-delay: 130ms; }
  .topbar.is-menu-open nav a:nth-child(5) { transition-delay: 160ms; }
  .topbar.is-menu-open nav a:nth-child(6) { transition-delay: 190ms; }
  .topbar nav a.active {
    background: transparent;
    color: var(--fg);
  }
  .mobile-nav-cta {
    display: block;
    margin-top: 22px;
    padding: 17px 20px;
    border: 1px solid var(--fg);
    background: var(--fg);
    color: var(--bg) !important;
    text-align: center;
    border-radius: 999px;
    font-size: 16px;
    line-height: 1;
    letter-spacing: -0.01em;
  }
  .topbar-actions {
    flex: 0 0 auto;
    gap: 8px;
    order: 2;
    margin-left: auto;
  }
  .topbar .cta {
    display: none;
  }
  .topbar .meta {
    order: 3;
    width: 100%;
    justify-content: space-between;
  }

  .page {
    padding: 56px var(--gutter) 96px;
  }
  .display {
    font-size: clamp(42px, 15vw, 68px);
    line-height: .98;
  }
  .lede {
    font-size: 17px;
    margin-top: 20px;
  }
  .section {
    margin-top: 84px;
    padding-top: 54px;
  }
  .section-head {
    gap: 16px;
    margin-bottom: 28px;
  }
  .section-head h2 {
    font-size: clamp(28px, 10vw, 38px);
  }
  .footer {
    padding: 32px var(--gutter);
    gap: 22px;
  }
  .footer > * {
    flex: 1 1 100%;
    min-width: 0;
  }

  .scale {
    grid-template-columns: repeat(5, 1fr) !important;
  }
  .ratio-pair {
    height: auto !important;
    flex-direction: column;
  }
  .ratio-pair > div {
    min-height: 56px;
  }
  .specimen .sample {
    font-size: clamp(82px, 30vw, 140px) !important;
  }
  .specimen .meta-grid,
  .rule-list {
    grid-template-columns: 1fr !important;
  }
  .scale-row,
  .size-row {
    grid-template-columns: 1fr !important;
    gap: 8px !important;
  }
  .clearspace {
    padding: 44px 20px !important;
    min-height: 240px !important;
  }
  .logo-stage {
    padding: 36px 20px !important;
    min-height: 220px !important;
  }
  .swatch .meta {
    flex-direction: column;
    align-items: flex-start !important;
  }
  .swatch .vals {
    text-align: left !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .menu-toggle,
  .menu-toggle span,
  .topbar nav,
  .topbar nav a {
    transition-duration: .001ms !important;
  }
}