/* Layout: a calm single-column reading width (68ch) for prose, widening to a 1120px grid for app cards and lists.
   Palette: monsoon green ink on a cool paper white, with a laterite-stone accent from Kerala walls. */
:root {
  --paper: #F6F8F5;
  --surface: #FFFFFF;
  --ink: #142019;
  --ink-2: #3F4F46;
  --muted: #65746B;
  --line: #DCE3DD;
  --green: #1F3A2E;
  --green-soft: #E3EDE6;
  --laterite: #B04A24;
  --laterite-soft: #F7E6DD;
  --gold: #9C7A26;
  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --radius: 14px;
  --max: 1120px;
  --prose: 68ch;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0E1612;
    --surface: #15201A;
    --ink: #E7EEE9;
    --ink-2: #C3D0C8;
    --muted: #93A49A;
    --line: #26352D;
    --green: #A9D5BC;
    --green-soft: #1C2C24;
    --laterite: #E98A63;
    --laterite-soft: #33211A;
    --gold: #D8B65E;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: var(--laterite); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--laterite); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; text-wrap: balance; color: var(--ink); margin: 0; }
h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.2rem; font-weight: 500; }
p { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.eyebrow { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--laterite); }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding-inline: 20px; }
.narrow { max-width: calc(var(--prose) + 40px); }
.section { padding-block: clamp(48px, 8vw, 88px); }
.section + .section { border-top: 1px solid var(--line); }
.section-head { display: grid; gap: 8px; margin-bottom: 28px; max-width: 60ch; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--paper); position: sticky; top: 0; z-index: 5; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 14px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 32px; height: 32px; border-radius: 9px; background: var(--laterite); color: #FFF8F3; display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 18px; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-dim { color: var(--muted); font-weight: 500; }
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.site-nav a { color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 0.95rem; padding: 6px 10px; border-radius: 8px; }
.site-nav a:hover { background: var(--green-soft); }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--green-soft); }

/* Buttons */
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; font: 600 0.95rem var(--font-body); padding: 12px 18px; border-radius: 10px; text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--surface); cursor: pointer; }
.btn:hover { border-color: var(--ink-2); }
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover { background: var(--green); border-color: var(--green); }
.btn[aria-disabled="true"] { opacity: 0.7; cursor: default; }

/* Hero */
.hero { padding-block: clamp(56px, 10vw, 112px) clamp(40px, 7vw, 72px); }
.hero-grid { display: grid; gap: 40px; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); align-items: end; }
.hero h1 { max-width: 14ch; }
.hero h1 em { font-style: normal; color: var(--laterite); }
.hero-lede { font-size: 1.15rem; color: var(--ink-2); max-width: 52ch; margin-top: 20px; }
.hero .actions { margin-top: 28px; }
.facts { display: grid; gap: 0; border-top: 1px solid var(--line); }
.facts div { display: flex; justify-content: space-between; gap: 16px; padding-block: 12px; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-weight: 600; text-align: right; }

/* App cards */
.app-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.app-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: grid; gap: 14px; align-content: start; }
.app-card-top { display: flex; gap: 14px; align-items: center; }
.app-icon { width: 56px; height: 56px; border-radius: 14px; flex: none; }
.app-card h3 a { color: var(--ink); text-decoration: none; }
.app-card h3 a:hover { color: var(--laterite); }
.pill { display: inline-block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; padding: 3px 8px; border-radius: 999px; background: var(--laterite-soft); color: var(--laterite); }
.pill.live { background: var(--green-soft); color: var(--green); }
.meta-line { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.next-note { border: 1px dashed var(--line); border-radius: var(--radius); padding: 22px; color: var(--muted); display: grid; align-content: center; }

/* Site list */
.site-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.site-row { display: grid; grid-template-columns: minmax(0, 220px) minmax(0, 1fr) auto; gap: 16px; padding-block: 18px; border-bottom: 1px solid var(--line); align-items: baseline; }
.site-row h3 { font-size: 1.05rem; }
.site-row .domain { font-family: var(--font-mono); font-size: 0.8rem; }

/* Principles */
.principles { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.principle { display: grid; gap: 8px; }
.principle .num { font-family: var(--font-mono); color: var(--laterite); font-size: 0.8rem; }

/* Post list */
.post-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.post-item { padding-block: 22px; border-bottom: 1px solid var(--line); display: grid; gap: 6px; }
.post-item h3 { font-size: 1.25rem; font-weight: 700; }
.post-item h3 a { color: var(--ink); text-decoration: none; }
.post-item h3 a:hover { color: var(--laterite); }
.empty { color: var(--muted); padding: 24px 0; }

/* Contact band */
.contact-band { background: var(--green); color: var(--paper); border-radius: var(--radius); padding: clamp(28px, 5vw, 48px); display: grid; gap: 16px; }
.contact-band h2 { color: var(--paper); }
.contact-band p { color: var(--paper); opacity: 0.85; max-width: 52ch; }
.contact-band .btn { background: var(--paper); color: var(--green); border-color: var(--paper); }

/* App page */
.app-hero { display: grid; gap: 32px; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); align-items: center; }
.app-hero .app-icon { width: 88px; height: 88px; border-radius: 22px; }
.phone { aspect-ratio: 9 / 19; max-width: 260px; width: 100%; margin-inline: auto; border-radius: 34px; border: 8px solid var(--ink); background: linear-gradient(170deg, #12392C 0%, #0B241C 55%, #06140F 100%); position: relative; overflow: hidden; }
.phone-clock { position: absolute; top: 12%; left: 0; right: 0; text-align: center; color: #F3EBD4; font-family: var(--font-display); font-size: 2.6rem; font-weight: 500; }
.phone-date { position: absolute; top: 25%; left: 0; right: 0; text-align: center; color: #F3EBD4; opacity: 0.8; font-size: 0.8rem; }
.phone svg { position: absolute; left: 50%; bottom: 14%; transform: translateX(-50%); width: 70%; }
.feature-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; display: grid; gap: 6px; align-content: start; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { border: 1px solid var(--line); background: var(--surface); padding: 6px 12px; border-radius: 999px; font-size: 0.92rem; }
.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding-block: 16px; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 1.05rem; }
.faq details p { margin-top: 10px; color: var(--ink-2); }

/* Prose */
.prose { max-width: var(--prose); }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; font-weight: 700; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.4em; }
.prose blockquote { margin-inline: 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--laterite); color: var(--ink-2); }
.prose code { font-family: var(--font-mono); font-size: 0.88em; background: var(--green-soft); padding: 2px 5px; border-radius: 5px; }
.prose pre { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; overflow-x: auto; font-size: 0.88rem; line-height: 1.55; }
.prose pre code { background: none; padding: 0; }
.prose figure { margin: 1.6em 0; }
.prose figcaption { font-size: 0.88rem; color: var(--muted); margin-top: 6px; }
.prose img { border-radius: 10px; }
.table-wrap { overflow-x: auto; }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-weight: 600; }
.page-head { padding-block: clamp(48px, 8vw, 80px) 24px; display: grid; gap: 14px; }
.page-head p.lede { font-size: 1.12rem; color: var(--ink-2); max-width: 60ch; }
.post-meta { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); display: flex; gap: 14px; flex-wrap: wrap; }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; font-size: 0.95rem; }
.toc ol { margin: 8px 0 0; padding-left: 1.2em; }
.author-box { margin-top: 48px; border-top: 1px solid var(--line); padding-top: 24px; display: flex; gap: 14px; align-items: flex-start; }
.author-box .brand-mark { width: 44px; height: 44px; font-size: 22px; border-radius: 12px; flex: none; }
.breadcrumbs { font-size: 0.85rem; color: var(--muted); }
.breadcrumbs a { color: var(--muted); }

/* Contact */
.email-box { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.email-box code { font-family: var(--font-mono); font-size: 1.05rem; user-select: all; word-break: break-all; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 40px; }
.footer-inner { display: grid; gap: 24px; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr); padding-block: 36px; }
.footer-brand { font-family: var(--font-display); font-weight: 700; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 16px; align-content: start; }
.footer-links a { color: var(--ink-2); text-decoration: none; }
.footer-links a:hover { color: var(--laterite); }

@media (max-width: 820px) {
  .hero-grid, .app-hero { grid-template-columns: minmax(0, 1fr); }
  .site-row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  body { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }