/* NextFrame design tokens — premium light, Apple-inspired (original) */
:root {
  /* Surfaces — warm off-white system */
  --bg: oklch(0.985 0.003 80);
  --bg-elev: oklch(0.995 0.002 80);
  --bg-tint: oklch(0.965 0.004 80);
  --bg-deep: oklch(0.945 0.005 80);

  /* Text */
  --fg: oklch(0.20 0.012 270);
  --fg-2: oklch(0.38 0.012 270);
  --fg-3: oklch(0.55 0.012 270);
  --fg-4: oklch(0.72 0.010 270);

  /* Hairlines */
  --line: color-mix(in oklab, var(--fg) 10%, transparent);
  --line-2: color-mix(in oklab, var(--fg) 6%, transparent);

  /* Accent gradient (default: warm) — overridden by tweaks */
  --accent-a: #FF7A1A;
  --accent-b: #FF375F;
  --accent: #FF5A30;
  --accent-grad: linear-gradient(110deg, var(--accent-a) 0%, var(--accent-b) 100%);
  --accent-grad-soft: linear-gradient(110deg,
    color-mix(in oklab, var(--accent-a) 18%, transparent) 0%,
    color-mix(in oklab, var(--accent-b) 18%, transparent) 100%);

  /* Status */
  --ok: oklch(0.68 0.16 150);
  --warn: oklch(0.78 0.16 80);
  --err: oklch(0.62 0.22 25);
  --info: oklch(0.66 0.16 240);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.62);
  --glass-bg-strong: rgba(255, 255, 255, 0.78);
  --glass-bd: rgba(255, 255, 255, 0.7);
  --glass-shadow:
    0 1px 0 rgba(255, 255, 255, 0.7) inset,
    0 0.5px 0 rgba(0, 0, 0, 0.04),
    0 12px 40px -12px rgba(20, 14, 8, 0.18),
    0 2px 6px -2px rgba(20, 14, 8, 0.08);

  /* Radii */
  --r-1: 6px;
  --r-2: 10px;
  --r-3: 14px;
  --r-4: 18px;
  --r-5: 24px;
  --r-pill: 999px;

  /* Type */
  --f-display: "Inter Tight", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --f-body: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Spacing scale */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--f-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

::selection { background: color-mix(in oklab, var(--accent) 30%, transparent); color: var(--fg); }

/* Reusable utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  font-weight: 500;
}

.h-display {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.02;
  font-size: clamp(40px, 6.4vw, 84px);
  color: var(--fg);
}
.h-1 {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -0.028em;
  line-height: 1.05;
  font-size: clamp(32px, 4.4vw, 56px);
}
.h-2 {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -0.022em;
  line-height: 1.1;
  font-size: clamp(24px, 2.6vw, 36px);
}
.h-3 {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -0.018em;
  line-height: 1.2;
  font-size: 20px;
}
.lede {
  font-size: clamp(17px, 1.4vw, 21px);
  color: var(--fg-2);
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.mono { font-family: var(--f-mono); font-feature-settings: "ss02"; }
.tabular { font-variant-numeric: tabular-nums; }

/* Glass surfaces */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  backdrop-filter: blur(24px) saturate(160%);
  border: 0.5px solid var(--glass-bd);
  box-shadow: var(--glass-shadow);
}
.glass-strong {
  background: var(--glass-bg-strong);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  backdrop-filter: blur(28px) saturate(180%);
  border: 0.5px solid var(--glass-bd);
  box-shadow: var(--glass-shadow);
}

/* Card — solid surface */
.card {
  background: var(--bg-elev);
  border: 0.5px solid var(--line);
  border-radius: var(--r-3);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.6) inset,
    0 1px 2px rgba(20, 14, 8, 0.04),
    0 6px 24px -12px rgba(20, 14, 8, 0.08);
}

/* Pill / chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-2);
  background: var(--bg-tint);
  border: 0.5px solid var(--line);
}
.chip .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ok) 22%, transparent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 18px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 0.5px solid transparent;
  cursor: pointer;
  transition: transform 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out), background 0.18s var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-grad);
  color: white;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.4) inset,
    0 8px 24px -8px color-mix(in oklab, var(--accent) 60%, transparent);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgba(255,255,255,0.4) inset, 0 12px 30px -8px color-mix(in oklab, var(--accent) 70%, transparent); }
.btn-ghost {
  background: var(--bg-elev);
  color: var(--fg);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--bg-tint); }
.btn-quiet {
  background: transparent;
  color: var(--fg-2);
}
.btn-quiet:hover { color: var(--fg); background: var(--bg-tint); }
.btn-sm { height: 32px; padding: 0 14px; font-size: 13px; }
.btn-lg { height: 48px; padding: 0 22px; font-size: 15px; }

/* Section spacing */
.section {
  padding: clamp(64px, 8vw, 128px) 0;
}
.section-tight { padding: clamp(48px, 5vw, 80px) 0; }

/* Divider */
.hr {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* Grids */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Mesh glow background — subtle, premium */
.mesh-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.mesh-bg::before,
.mesh-bg::after {
  content: "";
  position: absolute;
  width: 60vw;
  height: 60vw;
  max-width: 800px;
  max-height: 800px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
}
.mesh-bg::before {
  background: radial-gradient(closest-side, color-mix(in oklab, var(--accent-a) 50%, transparent), transparent);
  top: -10%;
  left: -10%;
}
.mesh-bg::after {
  background: radial-gradient(closest-side, color-mix(in oklab, var(--accent-b) 45%, transparent), transparent);
  top: 30%;
  right: -15%;
}

/* Code blocks */
.code {
  font-family: var(--f-mono);
  font-size: 13px;
  background: oklch(0.16 0.01 270);
  color: oklch(0.94 0.005 80);
  border-radius: var(--r-3);
  padding: 16px 18px;
  overflow-x: auto;
  border: 0.5px solid color-mix(in oklab, white 8%, transparent);
}
.code .k { color: #FF8FA3; }
.code .s { color: #B6E388; }
.code .c { color: oklch(0.55 0.01 270); }
.code .n { color: #9BD7FF; }

/* Tables */
table.t {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
table.t th, table.t td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 0.5px solid var(--line);
}
table.t th {
  font-weight: 500;
  color: var(--fg-3);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--bg-tint);
}
table.t tr:hover td { background: color-mix(in oklab, var(--bg-tint) 60%, transparent); }

/* Subtle dotted texture for hero (placeholder pattern) */
.dotgrid {
  background-image: radial-gradient(circle at 1px 1px, color-mix(in oklab, var(--fg) 10%, transparent) 1px, transparent 0);
  background-size: 24px 24px;
  background-position: 0 0;
}

/* Striped placeholder */
.placeholder-stripe {
  background:
    repeating-linear-gradient(135deg,
      var(--bg-tint) 0 12px,
      var(--bg-deep) 12px 24px);
  border: 0.5px dashed var(--line);
  border-radius: var(--r-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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

/* Anim */
@keyframes nf-fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: nf-fade-up 0.7s var(--ease-out) both; }

/* Focus ring */
:focus-visible {
  outline: 2px solid color-mix(in oklab, var(--accent) 70%, transparent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: color-mix(in oklab, var(--fg) 18%, transparent); border-radius: 999px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: color-mix(in oklab, var(--fg) 28%, transparent); border: 2px solid transparent; background-clip: content-box; }