/* TULA site: calm, spacious, one accent. Shared by the home page and both demos. */
@font-face { font-family: "Bricolage Grotesque"; src: url(fonts/bricolage-grotesque.woff2) format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "Geist"; src: url(fonts/geist.woff2) format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url(fonts/geist-mono.woff2) format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Tula Deva"; src: url(fonts/tula-devanagari.woff2) format("woff2"); font-weight: 600; font-display: swap; }

:root {
  --bg: #0d0f0e; --surface: #151817; --surface-2: #1b1f1d; --ink: #eceeed; --muted: #9ba29e; --faint: #6c736f;
  --line: rgba(255, 255, 255, 0.08);
  --accent: #34d399; --accent-2: #a3e635; --grad: linear-gradient(110deg, #34d399, #a3e635);
  --charge: #34d399; --hold: #f5b94a; --review: #f87171; --on-accent: #06120c;
  --display: "Bricolage Grotesque", "Avenir Next", system-ui, sans-serif;
  --body: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --deva: "Tula Deva", "Noto Serif Devanagari", serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) {
  --bg: #fafaf8; --surface: #ffffff; --surface-2: #f2f4f2; --ink: #131614; --muted: #5a615d; --faint: #8a918d;
  --line: rgba(0, 0, 0, 0.08); --accent: #059669; --accent-2: #65a30d; --grad: linear-gradient(110deg, #059669, #65a30d);
  --charge: #059669; --hold: #b45309; --review: #dc2626; --on-accent: #ffffff; color-scheme: light } }
:root[data-theme="light"] {
  --bg: #fafaf8; --surface: #ffffff; --surface-2: #f2f4f2; --ink: #131614; --muted: #5a615d; --faint: #8a918d;
  --line: rgba(0, 0, 0, 0.08); --accent: #059669; --accent-2: #65a30d; --grad: linear-gradient(110deg, #059669, #65a30d);
  --charge: #059669; --hold: #b45309; --review: #dc2626; --on-accent: #ffffff; color-scheme: light }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17.5px/1.7 var(--body); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: 1080px; margin: 0 auto; padding-left: max(24px, env(safe-area-inset-left, 0px)); padding-right: max(24px, env(safe-area-inset-right, 0px)); }
.prose { max-width: 680px; }
.mono { font-family: var(--mono); font-size: 0.92em; }
.accent { color: var(--accent); }
.brand { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* top bar */
.bar { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.bar .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 28px; padding-block: 14px; }
.logo { display: flex; align-items: center; gap: 10px; font: 800 18px/1 var(--display); letter-spacing: 0.16em; color: var(--ink); text-decoration: none; }
.logo svg { width: 24px; height: 24px; }
.bar nav { display: flex; flex-wrap: wrap; gap: 4px 24px; font-size: 15px; }
.bar nav a { color: var(--muted); text-decoration: none; }
.bar nav a:hover, .bar nav a[aria-current="page"] { color: var(--ink); }

/* type */
.kicker { font: 500 12.5px/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin: 0 0 18px; }
h1 { font: 800 clamp(40px, 6.4vw, 72px)/1.02 var(--display); letter-spacing: -0.03em; margin: 0; text-wrap: balance; }
h1 .deva { font-family: var(--deva); font-weight: 600; letter-spacing: 0; }
h2 { font: 700 clamp(30px, 4vw, 44px)/1.1 var(--display); letter-spacing: -0.02em; margin: 0 0 20px; text-wrap: balance; }
h3 { font: 700 20px/1.3 var(--display); margin: 0 0 8px; letter-spacing: -0.01em; }
p { margin: 0 0 16px; }
.lede { font-size: clamp(18px, 2vw, 21px); line-height: 1.6; color: var(--muted); max-width: 640px; margin: 24px 0 0; }
.lede strong, .prose strong { color: var(--ink); font-weight: 600; }
.prose p { color: var(--muted); }

/* layout */
header.hero { padding-block: 120px 72px; }
section { padding-block: 104px; border-top: 1px solid var(--line); }
.section-head { margin-bottom: 44px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface);
       color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15.5px; transition: transform .2s, border-color .2s; }
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.btn.primary { background: var(--grad); color: var(--on-accent); border: 0; }
.art { border-radius: 20px; overflow: hidden; border: 1px solid var(--line); margin-top: 64px; }
.art img { width: 100%; }
.caption { font-size: 14.5px; color: var(--faint); margin-top: 14px; }

/* numbered points without boxes */
.points { display: grid; grid-template-columns: repeat(auto-fit, minmax(205px, 1fr)); gap: 40px 44px; margin-top: 8px; }
.points > div { min-width: 0; }
.points .n { font: 600 13px/1 var(--mono); color: var(--accent); letter-spacing: 0.1em; display: block; margin-bottom: 14px; }
.points p { color: var(--muted); font-size: 16.5px; margin: 0; }

/* big numbers */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 36px 40px; }
.stat b { display: block; font: 800 52px/1 var(--display); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; margin-bottom: 10px; }
.stat span { font-size: 15.5px; color: var(--muted); display: block; max-width: 26ch; }
.bad { color: var(--review); }
.good { color: var(--accent); }

/* quote */
.pull { font: 700 clamp(24px, 3vw, 32px)/1.3 var(--display); letter-spacing: -0.015em; margin: 36px 0; padding-left: 24px; border-left: 3px solid var(--accent); max-width: 760px; }

/* the two demos */
.demos { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.demo-card { display: flex; flex-direction: column; gap: 12px; padding: 36px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line);
             color: inherit; text-decoration: none; transition: transform .25s, border-color .25s; min-width: 0; }
.demo-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.demo-card .tag { font: 600 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.demo-card h3 { font-size: 28px; margin: 4px 0 4px; }
.demo-card p { color: var(--muted); margin: 0; }
.demo-card ul { margin: 6px 0 0; padding-left: 18px; color: var(--muted); font-size: 15.5px; display: grid; gap: 4px; }
.demo-card .go { margin-top: auto; padding-top: 18px; font-weight: 600; color: var(--accent); }

/* two columns */
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px 56px; }
.cols > div { min-width: 0; }
.cols .tag { font: 600 12px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); display: block; margin-bottom: 12px; }
.cols p { color: var(--muted); font-size: 16.5px; }
ul.limits { margin: 0; padding-left: 20px; color: var(--muted); display: grid; gap: 10px; max-width: 760px; }

/* "what you are looking at" box on demo pages */
.guide { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 32px 36px; margin-top: 40px; }
.guide h2 { font-size: 22px; margin-bottom: 18px; }
.guide .points { gap: 28px 40px; }

footer { padding-block: 56px 72px; color: var(--faint); font-size: 14.5px; border-top: 1px solid var(--line); }
footer a { color: var(--muted); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .9s ease, transform .9s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@media (max-width: 640px) { header.hero { padding-block: 72px 40px; } section { padding-block: 72px; } .demo-card { padding: 26px; } .guide { padding: 24px; } }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }