/* Rushal Vaghani — engineering workbench
   Base system: tokens, typography, header, hero, about, contact, footer.
   Light only. No external fonts, scripts or requests. */

:root {
  color-scheme: light;

  /* Surfaces */
  --paper: #f5f0e7;
  --paper-deep: #ece4d6;
  --porcelain: #fcfaf6;
  --linen: #e9e0d0;
  --bench-edge: #d3c6b0;
  --bench-shadow: #b5a68c;

  /* Ink — all text colours pass 4.5:1 on paper, porcelain and linen */
  --ink: #1d2b36;
  --ink-2: #3b4a54;
  --ink-3: #56605c;
  --line: #d9cfbf;
  --line-strong: #b3a690;

  /* Metals */
  --alu-1: #f1f2f3;
  --alu-2: #dadee1;
  --alu-3: #b6bdc2;
  --alu-4: #8d969c;

  /* Accent: one orange for actions, one darker for text */
  --accent: #c2410c;
  --accent-hover: #a8380b;
  --accent-ink: #a3360b;
  --accent-soft: #f7e1d2;

  /* States (always paired with text, never colour alone) */
  --ok: #2f6b4f;
  --ok-soft: #dcefe4;
  --warn: #8a5a00;
  --warn-soft: #f6e8c8;
  --bad: #b42318;
  --bad-soft: #f8dcd8;
  --idle: #5f6670;
  --idle-soft: #e7e8ea;

  --focus: #1d2b36;
  --focus-halo: #f5f0e7;

  /* Type */
  --serif: Georgia, "Iowan Old Style", "Noto Serif", "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --text-xs: 0.75rem;    /* 12px — the smallest size used anywhere */
  --text-s: 0.875rem;    /* 14px */
  --text-m: 1rem;        /* 16px */
  --text-l: 1.1875rem;   /* 19px */
  --text-xl: clamp(1.375rem, 1.1rem + 1vw, 1.75rem);
  --text-2xl: clamp(1.875rem, 1.3rem + 2.2vw, 2.875rem);
  --text-hero: clamp(3rem, 1.5rem + 5vw, 5.5rem);

  /* Space, shape, depth */
  --gutter: clamp(16px, 4vw, 56px);
  --max: 1320px;
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 20px;
  --shadow-1: 0 1px 0 rgb(255 255 255 / 70%) inset, 0 1px 2px rgb(70 52 28 / 10%), 0 8px 18px -10px rgb(70 52 28 / 28%);
  --shadow-2: 0 1px 0 rgb(255 255 255 / 80%) inset, 0 2px 4px rgb(70 52 28 / 10%), 0 18px 34px -16px rgb(70 52 28 / 36%);
  --shadow-3: 0 2px 6px rgb(70 52 28 / 12%), 0 30px 60px -24px rgb(50 38 20 / 45%);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* Families: one accent set per project, inside the same system.
   --fam-ink passes 5:1 on --fam-tint, paper and porcelain. */
[data-family="linux"]      { --fam-ink: #34475b; --fam-tint: #e5e8ea; --fam-accent: #c9b48a; --fam-deep: #26364a; }
[data-family="kit"]        { --fam-ink: #155a61; --fam-tint: #dcefeb; --fam-accent: #e4937d; --fam-deep: #0f454b; }
[data-family="wellness"]   { --fam-ink: #45604b; --fam-tint: #e5eddb; --fam-accent: #bc8065; --fam-deep: #344a39; }
[data-family="ocr"]        { --fam-ink: #2f3a41; --fam-tint: #f3e6d8; --fam-accent: #9b714c; --fam-deep: #22292e; }
[data-family="clinical"]   { --fam-ink: #123b59; --fam-tint: #e1f2f6; --fam-accent: #087f8b; --fam-deep: #0c2a40; }
[data-family="courier"]    { --fam-ink: #3f5a6f; --fam-tint: #f4e9d3; --fam-accent: #d5a14a; --fam-deep: #2e4354; }
[data-family="mcp"]        { --fam-ink: #49305f; --fam-tint: #ebe3f3; --fam-accent: #ecae92; --fam-deep: #362347; }
[data-family="delivery"]   { --fam-ink: #2d4a7e; --fam-tint: #f6eabc; --fam-accent: #9fc1e3; --fam-deep: #213861; }
[data-family="editorial"]  { --fam-ink: #4a3a41; --fam-tint: #f3e3e8; --fam-accent: #a45e73; --fam-deep: #382b31; }
[data-family="storefront"] { --fam-ink: #36498a; --fam-tint: #e7e6fb; --fam-accent: #d6bc74; --fam-deep: #28376b; }
[data-family="lan"]        { --fam-ink: #2e5a5d; --fam-tint: #e2ede7; --fam-accent: #d3bea3; --fam-deep: #214346; }
[data-family="employee"]   { --fam-ink: #4a4874; --fam-tint: #ece6f4; --fam-accent: #a393bd; --fam-deep: #383659; }
[data-family="corporate"]  { --fam-ink: #335e71; --fam-tint: #dfeef1; --fam-accent: #b98a6e; --fam-deep: #264856; }

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
small { font-size: max(.75rem, .85em); } /* never below the 12px floor */
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; scrollbar-gutter: stable; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 var(--text-m)/1.6 var(--sans); text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
body:has(dialog[open]) { overflow: hidden; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:where(h1, h2, h3, h4, p, ul, ol, figure, blockquote) { margin: 0; }
:where(ul, ol)[role="list"], .plain-list { list-style: none; padding: 0; }
a { color: inherit; text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; box-shadow: 0 0 0 6px var(--focus-halo); border-radius: 4px; }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0; }
/* Controls that need JavaScript stay hidden until the script marks the page. */
html:not(.js) .js-only { display: none !important; }
.js .no-js-only { display: none !important; }

.skip-link { position: absolute; left: 12px; top: -80px; z-index: 50; padding: 12px 18px; background: var(--porcelain); color: var(--ink); border: 2px solid var(--ink); border-radius: var(--radius-s); font-weight: 600; text-decoration: none; }
.skip-link:focus { top: 12px; }

/* Shared text styles */
.eyebrow { font: 600 var(--text-xs)/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }
.hand { font-family: var(--serif); font-style: italic; color: var(--ink-2); }
.wrap { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }

/* Buttons and links */
.button { display: inline-flex; align-items: center; justify-content: center; gap: .55em; min-height: 48px; padding: .7em 1.35em; border-radius: 999px; border: 1.5px solid transparent; font-weight: 600; font-size: var(--text-m); line-height: 1.2; text-decoration: none; transition: transform .2s var(--ease), background-color .2s, box-shadow .2s; }
.button:hover { text-decoration: none; transform: translateY(-1px); }
.button-primary { background: var(--accent); color: #fff; box-shadow: 0 1px 0 rgb(255 255 255 / 25%) inset, 0 8px 18px -10px rgb(160 50 10 / 60%); }
.button-primary:hover { background: var(--accent-hover); }
.button-quiet { background: var(--porcelain); color: var(--ink); border-color: var(--line-strong); box-shadow: var(--shadow-1); }
.button-quiet:hover { border-color: var(--ink-2); }
.button-small { min-height: 44px; padding: .5em 1.05em; font-size: var(--text-s); }

.ext { white-space: nowrap; }
.ext-icon { display: inline-block; margin-left: .25em; font-size: .9em; transform: translateY(-.05em); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: saturate(1.2) blur(8px); -webkit-backdrop-filter: saturate(1.2) blur(8px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.site-header.is-scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; }
.wordmark { display: inline-flex; align-items: center; min-height: 44px; font: 700 2rem/1 var(--serif); letter-spacing: -.04em; text-decoration: none; color: var(--ink); padding: 0 2px; }
.wordmark .dot { color: var(--accent); }
.primary-nav ul { display: flex; gap: clamp(4px, 1.6vw, 18px); margin: 0; padding: 0; list-style: none; }
.primary-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 .7em; border-radius: 999px; font-weight: 600; font-size: var(--text-s); text-decoration: none; color: var(--ink-2); }
.primary-nav a:hover { background: var(--paper-deep); color: var(--ink); }
.primary-nav a[aria-current="page"] { color: var(--ink); background: var(--paper-deep); }

/* Hero */
.hero { padding: clamp(20px, 4vw, 44px) 0 clamp(18px, 2.6vw, 30px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 72px); align-items: center; }
.hero h1 { font: 700 var(--text-hero)/.92 var(--serif); letter-spacing: -.045em; margin: 10px 0 14px; text-wrap: balance; }
.hero h1 .accent-dot { color: var(--accent); }
.hero-lede { font: 400 var(--text-xl)/1.3 var(--serif); color: var(--ink); max-width: 30ch; margin-bottom: 14px; text-wrap: balance; }
.hero-body { font-size: var(--text-l); line-height: 1.55; color: var(--ink-2); max-width: 46ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.profile-links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 10px; padding: 0; list-style: none; font-size: var(--text-s); font-weight: 600; }
.profile-links a { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink-2); }
.profile-links a:hover { color: var(--ink); }

.hero-side { display: grid; gap: 18px; }
.hero-facts { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; background: var(--porcelain); border: 1px solid var(--line); border-radius: var(--radius-m); box-shadow: var(--shadow-1); }
.hero-facts li { display: grid; grid-template-columns: 6.2em 1fr; gap: 12px; padding: 14px 18px; font-size: var(--text-s); line-height: 1.45; color: var(--ink-2); }
.hero-facts li + li { border-top: 1px dashed var(--line); }
.fact-label { font: 600 var(--text-xs)/1.6 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.hero-facts strong { color: var(--ink); font-weight: 600; }
.hero-note { position: relative; padding: 4px 4px 0 46px; font-size: var(--text-l); line-height: 1.45; max-width: 34ch; }
.hero-note::before { content: ""; position: absolute; left: 6px; top: 4px; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--accent); background: radial-gradient(circle, var(--accent) 0 3px, transparent 4px); }

/* Chips, stack and boundary notes (project pages) */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 0; padding: 0; list-style: none; }
.chip { display: inline-flex; align-items: center; min-height: 28px; padding: 3px 10px; border-radius: 999px; font: 600 var(--text-xs)/1.3 var(--mono); letter-spacing: .04em; color: var(--fam-ink, var(--ink-2)); background: var(--fam-tint, var(--paper-deep)); border: 1px solid color-mix(in srgb, var(--fam-ink, var(--ink)) 18%, transparent); }
.chip-status::before { content: ""; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: currentColor; }
.button-play { background: var(--fam-tint); color: var(--fam-deep); border: 1.5px solid color-mix(in srgb, var(--fam-ink) 35%, transparent); }
.button-play:hover { background: color-mix(in srgb, var(--fam-tint) 70%, var(--fam-accent)); }

.boundary { padding: 14px 16px; border-radius: var(--radius-m); background: var(--paper); border: 1px dashed var(--line-strong); }
.stack { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; list-style: none; }
.stack li { padding: 3px 10px; border-radius: var(--radius-s); background: var(--paper-deep); font: 500 var(--text-xs)/1.6 var(--mono); color: var(--ink-2); }
.case-links { display: flex; flex-wrap: wrap; gap: 10px; }
.case-links .ext { white-space: normal; text-align: left; }

/* About */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(28px, 6vw, 88px); }
.about-copy p { font-size: var(--text-l); line-height: 1.6; color: var(--ink-2); max-width: 56ch; }
.about-copy p + p { margin-top: 16px; }
.about-copy p.eyebrow, .contact-copy p.eyebrow { font: 600 var(--text-xs)/1.4 var(--mono); letter-spacing: .12em; color: var(--ink-3); max-width: none; }
.about-copy .about-direction { font-family: var(--serif); font-size: var(--text-xl); line-height: 1.35; color: var(--ink); }
.about-panels { display: grid; gap: 18px; }
.panel { padding: 22px 24px; background: var(--porcelain); border: 1px solid var(--line); border-radius: var(--radius-m); box-shadow: var(--shadow-1); }
.timeline { display: grid; gap: 16px; margin: 0; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr); gap: 4px 16px; }
.timeline .when { font: 500 var(--text-xs)/1.7 var(--mono); color: var(--ink-3); letter-spacing: .03em; }
.timeline .what { font-weight: 600; color: var(--ink); line-height: 1.35; }
.timeline .where { display: block; font-weight: 400; font-size: var(--text-s); color: var(--ink-3); margin-top: 2px; }
.timeline .detail { grid-column: 2; font-size: var(--text-s); color: var(--ink-2); line-height: 1.55; }
.principles { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.principles li { font-size: var(--text-s); line-height: 1.55; color: var(--ink-2); }
.principles strong { display: block; font-family: var(--serif); font-size: var(--text-l); color: var(--ink); font-weight: 700; }
.tools { font: 500 var(--text-s)/1.8 var(--mono); color: var(--ink-2); }

/* Contact */
.contact { padding: clamp(56px, 8vw, 104px) 0; }
.contact-card { position: relative; overflow: hidden; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 64px); padding: clamp(28px, 5vw, 64px); background: var(--porcelain); border: 1px solid var(--line); border-radius: var(--radius-l); box-shadow: var(--shadow-2); }
.contact h2 { font: 700 var(--text-2xl)/1.05 var(--serif); letter-spacing: -.03em; margin: 10px 0 16px; text-wrap: balance; }
.contact-copy p { color: var(--ink-2); font-size: var(--text-l); line-height: 1.55; max-width: 48ch; }
.contact-links { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; align-content: start; }
.contact-link { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; align-items: center; gap: 14px; min-height: 72px; padding: 12px 18px; border-radius: var(--radius-m); border: 1px solid var(--line); background: var(--paper); text-decoration: none; transition: transform .2s var(--ease), border-color .2s, box-shadow .2s; }
.contact-link:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--line-strong); box-shadow: var(--shadow-1); }
.contact-badge { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--ink); color: var(--porcelain); font: 700 var(--text-s)/1 var(--sans); letter-spacing: .02em; }
.contact-link strong { display: block; font-size: var(--text-m); color: var(--ink); }
.contact-link span.sub { display: block; font-size: var(--text-s); color: var(--ink-3); }
.contact-link .ext-icon { font-size: 1.1rem; color: var(--accent-ink); }

/* Footer */
.site-footer { padding: 36px 0 48px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 18px 40px; align-items: start; }
.footer-grid .wordmark { font-size: 1.75rem; }
.footer-note { font-size: var(--text-s); color: var(--ink-3); max-width: 62ch; line-height: 1.6; }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 0; padding: 0; list-style: none; font-size: var(--text-s); font-weight: 600; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink-2); }

/* Local-only flag. Remove the element before any public deploy. */
.local-flag { position: fixed; right: 12px; bottom: 12px; z-index: 30; margin: 0; padding: 6px 12px; border-radius: 999px; background: var(--porcelain); border: 1px solid var(--line-strong); box-shadow: var(--shadow-1); font: 600 var(--text-xs)/1.4 var(--mono); letter-spacing: .06em; color: var(--ink-2); }
.local-flag::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--accent); vertical-align: .05em; }

/* Responsive */
@media (max-width: 1000px) {
  .hero-grid, .about-grid, .contact-card { grid-template-columns: minmax(0, 1fr); }
  .hero-grid { align-items: start; }
}
@media (max-width: 720px) {
  .timeline li { grid-template-columns: minmax(0, 1fr); }
  .timeline .detail { grid-column: 1; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-facts li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .primary-nav a { padding: 0 .55em; }
}
@media (max-width: 720px) {
  .local-flag { display: none; }
}
@media (max-width: 380px) {
  .wordmark { font-size: 1.7rem; }
  .primary-nav ul { gap: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (forced-colors: active) {
  .button, .chip, .contact-link, .panel, .hero-facts { border: 1px solid CanvasText; }
}

@media print {
  .site-header, .bench-section, .local-flag, .js-only, dialog { display: none !important; }
  body { background: #fff; }
}