/* TurnipSoftware Inc. — site styles */

:root {
  --bg: #f6f6f2;
  --bg-alt: #eceee7;
  --surface: #ffffff;
  --text: #1b1f1c;
  --muted: #535b56;
  --border: #d9ddd5;
  --accent: #355c43;
  --accent-hover: #284735;
  --accent-soft: #e1ebe2;
  --leaf: #5f8f6c;
  --on-accent: #ffffff;
  --error: #a32a1f;
  --error-soft: #fbeceb;
  --focus: #1f6fd1;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --radius: 10px;
  --wrap: 72rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141715;
    --bg-alt: #1b1f1c;
    --surface: #1f2420;
    --text: #e6e9e5;
    --muted: #a7afa9;
    --border: #343b36;
    --accent: #8cc09b;
    --accent-hover: #a6d3b2;
    --accent-soft: #24332a;
    --leaf: #9cc7a8;
    --on-accent: #0f1a13;
    --error: #ff9b8f;
    --error-soft: #3a1f1c;
    --focus: #7db4ff;
  }
}

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 0.6em; text-wrap: balance; }
h1 { font-size: clamp(2rem, 1.3rem + 3vw, 3.25rem); letter-spacing: -0.03em; font-weight: 700; }
h2 { font-size: clamp(1.45rem, 1.2rem + 1vw, 2rem); letter-spacing: -0.02em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
p, li { text-wrap: pretty; }

a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-hover); text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }
main:focus, section:focus { outline: none; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  background: var(--accent); color: var(--on-accent); padding: 0.6rem 1rem; border-radius: var(--radius);
}
.skip-link:focus { top: 1rem; color: var(--on-accent); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.narrow { max-width: 46rem; margin-left: 0; }
.wrap.narrow { margin: 0 auto; max-width: calc(46rem + 2 * var(--gutter)); }
.muted { color: var(--muted); }

/* ---------- header ---------- */

.site-header { border-bottom: 1px solid var(--border); background: var(--bg); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem 2rem; flex-wrap: wrap; padding-top: 1rem; padding-bottom: 1rem; }

.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: -0.01em; font-size: 1.1rem; }
.brand:hover { color: var(--text); }
.mark { width: 1.9rem; height: 1.9rem; flex: none; }
.mark-leaf { fill: var(--leaf); }
.mark-root { fill: var(--accent); }

.nav { display: flex; flex-wrap: wrap; gap: 0.25rem 0.25rem; list-style: none; margin: 0; padding: 0; }
.nav a { display: block; padding: 0.4rem 0.7rem; border-radius: 6px; color: var(--muted); text-decoration: none; font-size: 0.97rem; font-weight: 500; }
.nav a:hover { color: var(--text); background: var(--bg-alt); }
.nav a[aria-current="page"] { color: var(--text); background: var(--accent-soft); }

.header-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 0.5rem 1rem; }
.lang ul { display: flex; list-style: none; margin: 0; padding: 0 0 0 1rem; border-left: 1px solid var(--border); gap: 0.1rem; }
.lang a { display: block; padding: 0.3rem 0.45rem; border-radius: 6px; color: var(--muted); text-decoration: none; font-size: 0.88rem; }
.lang a:hover { color: var(--text); background: var(--bg-alt); }
.lang a[aria-current="true"] { color: var(--text); font-weight: 600; }
.lang-short { display: none; }

@media (max-width: 40rem) {
  .header-inner { padding-bottom: 0.6rem; }
  .header-nav { width: 100%; }
  .nav { margin-left: -0.7rem; }
  .lang { position: absolute; top: 1.2rem; right: var(--gutter); }
  .lang ul { border-left: 0; padding: 0; }
  .lang-full { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .lang-short { display: inline; font-size: 0.82rem; letter-spacing: 0.03em; }
  .site-header { position: relative; }
  .nav a { padding: 0.45rem 0.7rem; font-size: 0.95rem; }
}

/* ---------- buttons ---------- */

.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  min-height: 2.9rem; padding: 0.7rem 1.3rem; border-radius: var(--radius);
  background: var(--accent); color: var(--on-accent); border: 2px solid var(--accent);
  font: inherit; font-weight: 600; font-size: 1rem; line-height: 1.2; text-decoration: none; cursor: pointer;
}
.button:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--on-accent); text-decoration: none; }
.button--secondary { background: transparent; color: var(--accent); }
.button--secondary:hover { background: var(--accent-soft); color: var(--accent-hover); }
.button--block { width: 100%; }
.button[disabled] { opacity: 0.65; cursor: progress; }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

/* ---------- hero & page heads ---------- */

.hero { padding: clamp(3rem, 8vw, 6.5rem) 0 clamp(3rem, 6vw, 5rem); }
.hero h1 { max-width: 22ch; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: 0.9rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 0.9rem; }
.tagline { font-size: clamp(1.2rem, 1rem + 0.8vw, 1.5rem); color: var(--muted); max-width: 36ch; margin-bottom: 1.6rem; }
.hero-copy { max-width: 44rem; }
.hero-copy p { font-size: 1.1rem; }

.page-head { padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem); }
.page-head h1 { max-width: 24ch; }
.lead { font-size: clamp(1.1rem, 1rem + 0.4vw, 1.25rem); color: var(--muted); max-width: 48rem; }
.prose .lead { color: var(--text); }

.breadcrumb ol { display: flex; flex-wrap: wrap; list-style: none; padding: 0; margin: 0 0 1.25rem; font-size: 0.92rem; color: var(--muted); }
.breadcrumb li + li::before { content: "/"; margin: 0 0.5rem; color: var(--border); }
.breadcrumb a { color: var(--muted); }

/* ---------- sections ---------- */

.section { padding: clamp(3rem, 7vw, 5rem) 0; }
.section--alt { background: var(--bg-alt); }
.section--tight { padding-top: 0; padding-bottom: clamp(2rem, 4vw, 3rem); }
.section--flush-top { padding-top: 0; }
.section-intro { color: var(--muted); max-width: 46rem; font-size: 1.1rem; margin-bottom: 2rem; }
.section-link { margin-top: 1.75rem; font-weight: 600; }

/* ---------- cards ---------- */

.card-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr)); }
.card {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.2rem; display: flex; flex-direction: column;
}
.card p { color: var(--muted); }
.card-title { font-size: 1.15rem; margin-bottom: 0.5rem; }
.card-title a { color: var(--text); text-decoration: none; }
.card-title a::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.card:hover { border-color: var(--accent); }
.card:hover .card-title a { color: var(--accent); }
.card:focus-within { outline: 3px solid var(--focus); outline-offset: 2px; }
.card-title a:focus-visible { outline: none; }
.card-more { margin-top: auto; margin-bottom: 0; font-weight: 600; color: var(--accent) !important; font-size: 0.95rem; }

.kind { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.5rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: auto 0 0; }
.tags li { font-size: 0.82rem; background: var(--accent-soft); color: var(--text); padding: 0.2rem 0.6rem; border-radius: 999px; }

/* ---------- system diagram ---------- */

.system { margin: 0; }
.system-grid {
  display: grid; gap: 0.6rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 12rem) minmax(0, 12rem);
  grid-template-rows: repeat(4, auto);
}
.system-layers { grid-column: 1; grid-row: 1 / span 4; display: grid; gap: 0.6rem; list-style: none; padding: 0; margin: 0; }
.system-layer, .system-band { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.9rem 1.1rem; display: flex; flex-direction: column; gap: 0.15rem; }
.system-layer { border-left: 4px solid var(--accent); }
.system-title { font-weight: 700; }
.system-detail { color: var(--muted); font-size: 0.95rem; line-height: 1.45; }
.system-band { justify-content: center; }
.system-band--ai { grid-column: 2; grid-row: 2 / span 2; background: var(--accent-soft); border-style: dashed; border-color: var(--accent); }
.system-band--support { grid-column: 3; grid-row: 1 / span 4; }
.system figcaption, .flow figcaption { margin-top: 1rem; color: var(--muted); font-size: 0.95rem; }

@media (max-width: 48rem) {
  .system-grid { grid-template-columns: 1fr; grid-template-rows: none; }
  .system-layers, .system-band--ai, .system-band--support { grid-column: auto; grid-row: auto; }
}

/* ---------- flow figure ---------- */

.flow { margin: 0 0 3rem; }
.flow-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 10rem), 1fr)); gap: 1.6rem; list-style: none; padding: 0; margin: 0; counter-reset: flow; }
.flow-step { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; display: flex; flex-direction: column; gap: 0.2rem; counter-increment: flow; }
.flow-step::before { content: counter(flow); font-size: 0.8rem; font-weight: 700; color: var(--accent); }
.flow-step:not(:last-child)::after { content: "→"; position: absolute; right: -1.25rem; top: 50%; transform: translateY(-50%); color: var(--accent); font-weight: 700; }
.flow-label { font-weight: 700; }
.flow-detail { color: var(--muted); font-size: 0.92rem; line-height: 1.45; }
@media (max-width: 44rem) {
  .flow-steps { grid-template-columns: 1fr; gap: 1.4rem; }
  .flow-step:not(:last-child)::after { content: "↓"; right: auto; left: 1.1rem; top: auto; bottom: -1.5rem; transform: none; }
}

/* ---------- steps ---------- */

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1.5rem; list-style: none; padding: 0; margin: 1.5rem 0 0; }
.step { display: flex; gap: 0.9rem; align-items: flex-start; }
.step-num { flex: none; width: 2.2rem; height: 2.2rem; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: var(--on-accent); font-weight: 700; }
.step-title { font-size: 1.05rem; margin: 0.25rem 0 0.35rem; }
.step p { color: var(--muted); margin: 0; }

/* ---------- lists ---------- */

.checklist { list-style: none; padding: 0; margin: 0 0 1em; }
.checklist li { position: relative; padding-left: 1.6rem; margin-bottom: 0.45rem; }
.checklist li::before { content: ""; position: absolute; left: 0.2rem; top: 0.6em; width: 0.55rem; height: 0.55rem; border-radius: 2px; background: var(--leaf); }
.plain-list { padding-left: 1.1rem; margin: 0 0 1em; }
.plain-list li { margin-bottom: 0.5rem; }
.plain-list li::marker { color: var(--accent); }
.inline-list { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0 0 1rem; }
.inline-list li { font-size: 0.88rem; border: 1px solid var(--border); padding: 0.2rem 0.65rem; border-radius: 999px; color: var(--muted); }
.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr)); gap: 0.6rem; list-style: none; padding: 0; margin: 0; }
.link-grid a { display: block; padding: 0.85rem 1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); font-weight: 600; text-decoration: none; }
.link-grid a:hover { border-color: var(--accent); }

/* ---------- services ---------- */

.chooser { list-style: none; padding: 0; margin: 0 0 1rem; border-top: 1px solid var(--border); }
.chooser li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 18rem); gap: 0.25rem 1.5rem; padding: 0.9rem 0; border-bottom: 1px solid var(--border); }
.chooser a { font-weight: 600; }
@media (max-width: 40rem) { .chooser li { grid-template-columns: 1fr; } }

.overview-list { display: grid; gap: 1rem; }
.service-overview { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.service-overview h2 { font-size: 1.35rem; }
.service-overview h2 a { color: var(--text); text-decoration: none; }
.service-overview h2 a:hover { color: var(--accent); text-decoration: underline; }
.row-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin: 0; font-weight: 600; }

.service-layout { display: grid; grid-template-columns: minmax(0, 1fr) 20rem; gap: 3rem; align-items: start; }
.service-aside { position: sticky; top: 1.5rem; }
@media (max-width: 60rem) {
  .service-layout { grid-template-columns: 1fr; gap: 2rem; }
  .service-aside { position: static; }
}
.topic { margin-bottom: 2.75rem; max-width: 46rem; }
.topic h2 { font-size: 1.4rem; }
.note { font-size: 0.95rem; color: var(--muted); border-left: 3px solid var(--border); padding-left: 1rem; }
.objectives { background: var(--accent-soft); border-radius: var(--radius); padding: 1.5rem; }

.aside-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; margin-bottom: 1rem; }
.aside-box h2 { font-size: 1.1rem; }
.aside-box > :last-child { margin-bottom: 0; }

/* ---------- experience ---------- */

.exp-layout { display: grid; grid-template-columns: 15rem minmax(0, 1fr); gap: 3rem; align-items: start; }
.toc { position: sticky; top: 1.5rem; font-size: 0.95rem; }
.toc-heading { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.toc ul { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--border); }
.toc a { display: block; padding: 0.35rem 0 0.35rem 1rem; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--accent); }
@media (max-width: 52rem) {
  .exp-layout { grid-template-columns: 1fr; gap: 2rem; }
  .toc { position: static; }
}
.exp-list { display: grid; gap: 1.25rem; }
.exp-entry { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 2rem); scroll-margin-top: 1rem; }
.exp-entry h2 { font-size: 1.4rem; }
.exp-detail { margin: 0; display: grid; gap: 1rem; }
.exp-detail dt { font-weight: 700; font-size: 0.9rem; margin-bottom: 0.2rem; }
.exp-detail dd { margin: 0; color: var(--muted); }
.exp-detail .tags { margin-top: 0.2rem; }
.scope-note { display: block; margin-top: 0.5rem; font-size: 0.93rem; font-style: italic; }

/* ---------- about ---------- */

.principles { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr)); gap: 1rem; list-style: none; padding: 0; margin: 0; }
.principles li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem; }
.principles p { color: var(--muted); margin: 0; }

/* ---------- call to action ---------- */

.cta { background: var(--accent); color: var(--on-accent); padding: clamp(2.5rem, 6vw, 4rem) 0; }
.cta-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem 3rem; }
.cta-inner > div { max-width: 44rem; }
.cta h2 { color: var(--on-accent); }
.cta p { margin-bottom: 0; opacity: 0.92; }
.cta .button { background: var(--on-accent); color: var(--accent); border-color: var(--on-accent); }
.cta .button:hover { background: transparent; color: var(--on-accent); }
.cta :focus-visible { outline-color: var(--on-accent); }

/* ---------- contact ---------- */

.contact-layout { display: grid; grid-template-columns: minmax(0, 1fr) 20rem; gap: 3rem; align-items: start; }
@media (max-width: 56rem) { .contact-layout { grid-template-columns: 1fr; gap: 2rem; } }
.contact-main { max-width: 40rem; }
.email-lead a { font-weight: 600; overflow-wrap: anywhere; }
.form-intro { color: var(--muted); font-size: 0.95rem; }
.field { margin-bottom: 1.25rem; }
.field label { display: block; font-weight: 600; margin-bottom: 0.35rem; }
.req { color: var(--error); }
.optional { font-weight: 400; color: var(--muted); }
.hint { margin: -0.15rem 0 0.4rem; color: var(--muted); font-size: 0.93rem; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--surface);
  border: 1.5px solid var(--border); border-radius: 8px; padding: 0.7rem 0.8rem; min-height: 2.9rem;
}
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 1.15rem) 1.25rem, calc(100% - 0.8rem) 1.25rem; background-size: 0.35rem 0.35rem; background-repeat: no-repeat; padding-right: 2.2rem; }
textarea { resize: vertical; min-height: 9rem; }
input:hover, select:hover, textarea:hover { border-color: var(--muted); }
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
[aria-invalid="true"] { border-color: var(--error); }
.field-error { color: var(--error); font-size: 0.93rem; font-weight: 600; margin: 0.35rem 0 0; }
.field--trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.privacy { font-size: 0.92rem; color: var(--muted); background: var(--bg-alt); border-radius: 8px; padding: 0.9rem 1rem; }
.form-status { border: 2px solid var(--error); background: var(--error-soft); color: var(--text); border-radius: var(--radius); padding: 1rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500; }
.form-status ul { margin: 0.5rem 0 0; padding-left: 1.2rem; }
.form-success { background: var(--accent-soft); border: 2px solid var(--accent); border-radius: var(--radius); padding: 1.5rem; }
.form-success h2 { font-size: 1.35rem; }
.form-success p:last-child { margin: 0; }

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--border); padding-top: 3rem; font-size: 0.95rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem; }
@media (max-width: 52rem) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 30rem) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand p { color: var(--muted); max-width: 24rem; margin-top: 0.75rem; }
.footer-heading { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 0.75rem; }
.footer-list { list-style: none; padding: 0; margin: 0; }
.footer-list li { margin-bottom: 0.45rem; }
.footer-list a { color: var(--text); text-decoration: none; overflow-wrap: anywhere; }
.footer-list a:hover { color: var(--accent); text-decoration: underline; }
.footer-base { border-top: 1px solid var(--border); margin-top: 2.5rem; padding-top: 1.25rem; padding-bottom: 1.5rem; color: var(--muted); }
.footer-base p { margin: 0; }

@media print {
  .site-header nav, .cta, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}

@media (max-width: 22rem) {
  .brand { font-size: 0.98rem; gap: 0.4rem; }
  .mark { width: 1.6rem; height: 1.6rem; }
  .lang a { padding: 0.3rem 0.3rem; }
}

.notfound-alt { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.notfound-alt h2 { font-size: 1.2rem; }