/* ==========================================================================
   graphify-ts benchmark proofs — Stripe-inspired design system
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Source+Code+Pro:wght@400;500;700&display=swap");

:root {
  color-scheme: light;

  /* ---- Palette --------------------------------------------------------- */
  /* Brand */
  --c-purple:        #533afd;   /* primary CTA / accent / link */
  --c-purple-hover:  #4434d4;
  --c-purple-deep:   #2e2b8c;
  --c-purple-mid:    #665efd;
  --c-purple-light:  #b9b9f9;
  --c-purple-soft:   #d6d9fc;

  --c-brand-dark:    #1c1e54;   /* dark immersive section */

  /* Neutrals */
  --c-white:         #ffffff;
  --c-heading:       #061b31;   /* deep navy — primary heading */
  --c-label:         #273951;   /* form labels, secondary text */
  --c-body:          #64748d;   /* body / muted text */
  --c-border:        #e5edf5;
  --c-border-soft:   #f1f5f9;
  --c-bg-soft:       #f8fafc;

  /* Accents (decorative only) */
  --c-ruby:          #ea2261;
  --c-magenta:       #f96bee;
  --c-magenta-light: #ffd7ef;

  /* Semantic */
  --c-success:       #15be53;
  --c-success-text:  #108c3d;
  --c-success-bg:    rgba(21, 190, 83, 0.12);
  --c-success-edge:  rgba(21, 190, 83, 0.35);
  --c-lemon:         #9b6829;
  --c-lemon-bg:      rgba(155, 104, 41, 0.08);
  --c-lemon-edge:    rgba(155, 104, 41, 0.25);

  /* Bar viz fills (light mode) */
  /* Swatch tints — subtle, used in the small 12px legend chips */
  --bar-baseline:        rgba(100, 116, 141, 0.18);
  --bar-baseline-edge:   rgba(100, 116, 141, 0.55);
  --bar-graphify:        rgba(83, 58, 253, 0.18);
  --bar-graphify-edge:   var(--c-purple);
  /* Bar fills — SOLID, used in the actual chart. The track behind them is
     almost-invisible so the solid fill is what your eye reads as "the bar". */
  --bar-baseline-fill:   var(--c-body);     /* solid slate #64748d */
  --bar-graphify-fill:   var(--c-purple);   /* solid Stripe purple #533afd */
  --bar-track-bg:        rgba(15, 23, 42, 0.04);
  --bar-track-edge:      rgba(15, 23, 42, 0.10);

  /* ---- Type ----------------------------------------------------------- */
  /* Inter is the open-source stand-in for sohne-var; both ship "ss01" + "tnum" */
  --font-sans: "Inter", "sohne-var", "SF Pro Display", -apple-system,
               BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "Source Code Pro", "SourceCodePro", "SF Mono", "Cascadia Mono",
               ui-monospace, Menlo, Monaco, Consolas, monospace;

  /* Type scale (Stripe-style with tight progressive tracking) */
  --fs-mega:    clamp(3.5rem, 7vw + 1rem, 6rem);   /* big proof number */
  --fs-display: 3.5rem;   /* 56px hero */
  --fs-large:   3rem;     /* 48px display */
  --fs-h1:      clamp(2rem, 2.5vw + 1rem, 3rem);
  --fs-h2:      2rem;     /* 32px section heading */
  --fs-h3:      1.625rem; /* 26px sub-heading */
  --fs-h4:      1.375rem; /* 22px sub-heading */
  --fs-lg:      1.125rem; /* 18px lede */
  --fs-body:    1rem;
  --fs-sm:      0.875rem;
  --fs-cap:     0.8125rem;
  --fs-cap-sm:  0.75rem;
  --fs-micro:   0.625rem;

  /* Letter-spacing tied to fs (tighter at larger sizes) */
  --tr-mega:    -0.04em;
  --tr-display: -0.025em;
  --tr-h2:      -0.02em;
  --tr-h3:      -0.015em;
  --tr-h4:      -0.012em;
  --tr-body:    0;

  /* ---- Spacing (Stripe is dense at the small end) --------------------- */
  --s-1:  0.25rem;   /* 4 */
  --s-2:  0.5rem;    /* 8 */
  --s-3:  0.75rem;   /* 12 */
  --s-4:  1rem;      /* 16 */
  --s-5:  1.25rem;   /* 20 */
  --s-6:  1.5rem;    /* 24 */
  --s-8:  2rem;      /* 32 */
  --s-10: 2.5rem;    /* 40 */
  --s-12: 3rem;      /* 48 */
  --s-16: 4rem;      /* 64 */
  --s-20: 5rem;      /* 80 */
  --s-24: 6rem;      /* 96 */

  /* ---- Radius (4-8px, Stripe is conservative) ------------------------- */
  --r-xs:  3px;
  --r-sm:  4px;
  --r-md:  6px;
  --r-lg:  8px;

  /* ---- Shadows (signature blue-tinted multi-layer) -------------------- */
  --sh-ambient:  rgba(23, 23, 23, 0.06) 0px 3px 6px;
  --sh-soft:     rgba(23, 23, 23, 0.08) 0px 15px 35px 0px;
  --sh-elev:     rgba(50, 50, 93, 0.25) 0px 30px 45px -30px,
                 rgba(0, 0, 0, 0.10) 0px 18px 36px -18px;
  --sh-deep:     rgba(3, 3, 39, 0.25) 0px 14px 21px -14px,
                 rgba(0, 0, 0, 0.10) 0px 8px 17px -8px;
  --sh-focus:    0 0 0 3px rgba(83, 58, 253, 0.25);
}

/* ==========================================================================
   Reset + base
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 300;
  font-feature-settings: "ss01", "cv11";
  line-height: 1.45;
  color: var(--c-heading);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--c-purple);
  text-decoration: none;
  transition: color 120ms ease;
}
a:hover { color: var(--c-purple-hover); text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible {
  outline: none;
  box-shadow: var(--sh-focus);
  border-radius: var(--r-xs);
}

code, pre, .mono { font-family: var(--font-mono); }

::selection { background: var(--c-purple-light); color: var(--c-heading); }

hr { border: 0; border-top: 1px solid var(--c-border); margin: var(--s-8) 0; }

/* ==========================================================================
   Layout
   ========================================================================== */

.shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--s-12) 0 var(--s-16);
}

.site-header {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--s-5) 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-sm);
  color: var(--c-body);
}

.site-header .brand {
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--c-heading);
  font-size: var(--fs-body);
}
.site-header .brand .dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--c-purple);
  border-radius: 999px;
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 0 4px rgba(83, 58, 253, 0.10);
}

.site-header nav { display: flex; gap: var(--s-5); }
.site-header nav a { color: var(--c-heading); font-weight: 400; }
.site-header nav a:hover { color: var(--c-purple); text-decoration: none; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--s-6);
  font-size: var(--fs-sm);
  font-weight: 400;
  color: var(--c-body);
}
.back-link:hover { color: var(--c-purple); text-decoration: none; }

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--c-heading);
  line-height: 1.12;
  font-feature-settings: "ss01";
}
h1 { font-size: var(--fs-h1); letter-spacing: var(--tr-display); line-height: 1.1; }
h2 { font-size: var(--fs-h2); letter-spacing: var(--tr-h2); line-height: 1.15; }
h3 { font-size: var(--fs-h3); letter-spacing: var(--tr-h3); }
h4 { font-size: var(--fs-h4); letter-spacing: var(--tr-h4); }

p { margin: 0; }

.eyebrow {
  display: inline-block;
  margin: 0 0 var(--s-4);
  font-size: var(--fs-cap-sm);
  font-weight: 500;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--c-purple);
  font-feature-settings: "ss01";
}

.lede {
  font-size: var(--fs-lg);
  font-weight: 300;
  line-height: 1.45;
  color: var(--c-body);
  margin: 0;
  max-width: 64ch;
}

.muted { color: var(--c-body); }
.faint { color: var(--c-label); }

em { font-style: italic; color: var(--c-heading); }

/* Inline code chips */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xs);
  padding: 1px 6px;
  color: var(--c-heading);
  font-weight: 500;
  font-feature-settings: normal;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: var(--s-12) 0 var(--s-12);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--s-12);
}

.hero h1 { margin-top: var(--s-3); }
.hero .lede { margin-top: var(--s-5); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4) var(--s-8);
  margin: var(--s-8) 0 0;
  padding-top: var(--s-6);
  border-top: 1px solid var(--c-border);
  font-size: var(--fs-sm);
}
.hero-meta .meta-item { display: flex; gap: var(--s-2); align-items: baseline; }
.hero-meta dt { color: var(--c-body); margin: 0; font-weight: 400; }
.hero-meta dd { margin: 0; color: var(--c-heading); font-weight: 500; }

/* ==========================================================================
   Section
   ========================================================================== */

.section {
  padding: var(--s-12) 0;
  border-top: 1px solid var(--c-border);
}
.section:first-of-type { border-top: 0; padding-top: 0; }

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-6);
  margin-bottom: var(--s-8);
}
.section-header h2 { font-size: var(--fs-h3); letter-spacing: var(--tr-h3); }
.section-header p {
  margin: 0;
  color: var(--c-body);
  font-size: var(--fs-sm);
  font-weight: 400;
}

/* ==========================================================================
   Headline metric (one big proof number)
   ========================================================================== */

.headline-metric {
  text-align: center;
  padding: var(--s-12) 0 var(--s-8);
}
.headline-metric .figure {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: var(--fs-mega);
  line-height: 0.95;
  letter-spacing: var(--tr-mega);
  color: var(--c-purple);
  display: inline-block;
  font-feature-settings: "ss01", "tnum";
  font-variant-numeric: tabular-nums;
}
.headline-metric .figure .small {
  font-size: 0.4em;
  color: var(--c-body);
  margin-left: 0.08em;
  vertical-align: 0.55em;
  letter-spacing: -0.01em;
  font-weight: 300;
}
.headline-metric .label {
  margin-top: var(--s-4);
  font-size: var(--fs-h4);
  letter-spacing: var(--tr-h4);
  color: var(--c-heading);
  font-weight: 300;
  font-feature-settings: "ss01";
}
.headline-metric .delta {
  margin-top: var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--c-body);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Metric grid (supporting numbers)
   ========================================================================== */

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--s-4);
}

.metric {
  padding: var(--s-6);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-ambient);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  transition: box-shadow 200ms ease, border-color 160ms ease, transform 200ms ease;
}
.metric:hover {
  border-color: var(--c-purple-soft);
  box-shadow: var(--sh-elev);
  transform: translateY(-1px);
}
.metric .figure {
  font-family: var(--font-sans);
  font-size: 2.25rem;
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--c-purple);
  font-feature-settings: "ss01", "tnum";
  font-variant-numeric: tabular-nums;
}
.metric .figure.neutral { color: var(--c-heading); }
.metric .figure.warning { color: var(--c-lemon); }
.metric .label {
  font-size: var(--fs-sm);
  color: var(--c-heading);
  font-weight: 400;
  line-height: 1.4;
}
.metric .sub {
  font-family: var(--font-mono);
  font-size: var(--fs-cap-sm);
  color: var(--c-body);
  font-weight: 500;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Comparison bars (the data viz)
   ========================================================================== */

.bars {
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}

.bar-group { display: flex; flex-direction: column; gap: var(--s-3); }
.bar-group .label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.bar-group .label-row .name {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-heading);
}
.bar-group .label-row .delta {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--c-purple);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.bar-row {
  display: grid;
  grid-template-columns: 220px 1fr 90px;
  align-items: center;
  gap: var(--s-4);
  font-size: var(--fs-sm);
}
@media (max-width: 720px) {
  .bar-row { grid-template-columns: 1fr; gap: var(--s-2); }
  .bar-row .value { text-align: left; }
}
.bar-row .legend {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--c-body);
  font-weight: 400;
}
.bar-row .legend .swatch {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: var(--r-xs);
}
.bar-row .legend .swatch.baseline {
  background: var(--bar-baseline);
  border: 1px solid var(--bar-baseline-edge);
}
.bar-row .legend .swatch.graphify {
  background: var(--bar-graphify);
  border: 1px solid var(--bar-graphify-edge);
}
.bar-row .bar {
  height: 18px;
  background: var(--bar-track-bg);
  border-radius: var(--r-sm);
  border: 1px solid var(--bar-track-edge);
  overflow: hidden;
  position: relative;
}
.bar-row .bar .fill {
  height: 100%;
  display: block;
  border-radius: var(--r-sm);
  animation: bar-grow 700ms cubic-bezier(0.2, 0.6, 0.2, 1) both;
  transform-origin: left;
}
.bar-row .bar .fill.baseline {
  background: var(--bar-baseline-fill);
}
.bar-row .bar .fill.graphify {
  background: var(--bar-graphify-fill);
}
.bar-row .value {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--c-heading);
  text-align: right;
}

@keyframes bar-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
@media (prefers-reduced-motion: reduce) {
  .bar-row .bar .fill { animation: none; }
}

/* ==========================================================================
   Cards (landing-page benchmark cards)
   ========================================================================== */

.benchmark-cards {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.benchmark-card {
  padding: var(--s-8);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-soft);
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  transition: box-shadow 200ms ease, border-color 160ms ease, transform 200ms ease;
  position: relative;
}
.benchmark-card:hover {
  border-color: var(--c-purple-soft);
  box-shadow: var(--sh-elev);
  transform: translateY(-2px);
}
.benchmark-card .eyebrow { margin-bottom: 0; }
.benchmark-card .card-headline {
  font-family: var(--font-sans);
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--c-purple);
  line-height: 1;
  font-feature-settings: "ss01", "tnum";
  font-variant-numeric: tabular-nums;
}
.benchmark-card .card-headline .small {
  font-size: 0.4em;
  color: var(--c-body);
  margin-left: 6px;
  font-weight: 400;
  letter-spacing: 0;
}
.benchmark-card h2 {
  font-size: var(--fs-h4);
  letter-spacing: var(--tr-h4);
}
.benchmark-card h2 a { color: var(--c-heading); }
.benchmark-card h2 a::after {
  content: " →";
  color: var(--c-purple);
  transition: transform 160ms ease;
  display: inline-block;
}
.benchmark-card:hover h2 a::after { transform: translateX(3px); }
.benchmark-card .card-summary {
  color: var(--c-body);
  font-size: var(--fs-sm);
  line-height: 1.5;
}
.benchmark-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-4);
  font-family: var(--font-mono);
  font-size: var(--fs-cap-sm);
  color: var(--c-body);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  border-top: 1px solid var(--c-border);
  padding-top: var(--s-4);
  margin-top: auto;
}

/* ==========================================================================
   Setup / definitions list
   ========================================================================== */

.setup-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--s-3) var(--s-6);
  grid-template-columns: minmax(180px, max-content) 1fr;
}
.setup-list dt {
  color: var(--c-label);
  font-size: var(--fs-sm);
  font-weight: 500;
  padding-top: 2px;
  font-feature-settings: "ss01";
}
.setup-list dd {
  margin: 0;
  color: var(--c-heading);
  font-size: var(--fs-body);
  font-weight: 300;
  line-height: 1.5;
}
@media (max-width: 640px) {
  .setup-list { grid-template-columns: 1fr; gap: var(--s-1) var(--s-4); }
  .setup-list dd { margin-bottom: var(--s-3); }
}

/* ==========================================================================
   Reproducer (terminal block — Stripe-style dark immersive)
   ========================================================================== */

.terminal {
  background: var(--c-brand-dark);
  border: 1px solid var(--c-brand-dark);
  border-radius: var(--r-md);
  padding: var(--s-4) var(--s-6);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-cap);
  font-weight: 500;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.92);
  box-shadow: var(--sh-elev);
}
.terminal .prompt { color: var(--c-purple-light); user-select: none; margin-right: 0.5em; }
.terminal .cmd    { color: rgba(255, 255, 255, 0.96); }
.terminal .comment{ color: rgba(255, 255, 255, 0.45); }

/* Strip the inline-code chip styling when <code> is inside a <pre> block —
   otherwise the near-white chip background overlays the dark terminal and
   hides the actual command text behind opaque bars. */
.terminal code,
pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-weight: inherit;
  font-size: inherit;
  border-radius: 0;
}

/* ==========================================================================
   Evidence files
   ========================================================================== */

.file-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--s-2);
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.file-list a {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  color: var(--c-heading);
  font-family: var(--font-mono);
  font-size: var(--fs-cap);
  font-weight: 500;
  transition: border-color 160ms ease, box-shadow 160ms ease, color 160ms ease, transform 160ms ease;
}
.file-list a:hover {
  border-color: var(--c-purple-soft);
  box-shadow: var(--sh-ambient);
  color: var(--c-purple);
  text-decoration: none;
  transform: translateY(-1px);
}
.file-list a .ico {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-body);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  width: 36px;
  padding: 2px 6px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xs);
  text-align: center;
}

/* ==========================================================================
   Disclosure callout
   ========================================================================== */

.disclosure {
  padding: var(--s-4) var(--s-5);
  background: var(--c-lemon-bg);
  border: 1px solid var(--c-lemon-edge);
  border-left: 3px solid var(--c-lemon);
  border-radius: var(--r-md);
  font-size: var(--fs-sm);
  color: var(--c-heading);
  font-weight: 300;
  line-height: 1.5;
}
.disclosure strong { color: var(--c-lemon); font-weight: 600; }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--s-8) 0 var(--s-12);
  border-top: 1px solid var(--c-border);
  font-size: var(--fs-sm);
  color: var(--c-body);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3) var(--s-6);
  justify-content: space-between;
}
.site-footer a { color: var(--c-body); font-weight: 400; }
.site-footer a:hover { color: var(--c-purple); }

/* ==========================================================================
   Responsive tweaks
   ========================================================================== */

@media (max-width: 640px) {
  .shell { padding: var(--s-8) 0 var(--s-12); }
  .section { padding: var(--s-8) 0; }
  .hero { padding: var(--s-8) 0; margin-bottom: var(--s-8); }
  .headline-metric { padding: var(--s-8) 0 var(--s-6); }
  .benchmark-card { padding: var(--s-6); }
}