/* ============================================================
   Frohsinn LLC — site.css
   Static stylesheet for index.html + contact.html
   (replaces Tailwind CDN + FontAwesome kit on these pages)
   Voice: nüchtern, kompetent, verlässlich.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* color */
  --navy: oklch(0.30 0.06 255);        /* brand navy (logo) */
  --navy-deep: oklch(0.24 0.05 255);   /* hero / footer surface */
  --navy-line: oklch(0.38 0.05 255);   /* hairlines on navy */
  --ink: oklch(0.25 0.03 255);         /* body text on light */
  --muted: oklch(0.45 0.02 255);       /* secondary text on light, ≥7:1 */
  --bg: oklch(0.985 0.002 255);
  --surface: oklch(0.955 0.006 255);
  --line: oklch(0.885 0.01 255);
  --accent: oklch(0.50 0.16 250);      /* azure for links on light, ≥4.5:1 */
  --accent-bright: oklch(0.80 0.10 230); /* azure for text on navy, ≥7:1 */
  --on-navy: oklch(0.97 0.005 255);
  --on-navy-muted: oklch(0.83 0.02 250); /* secondary text on navy, ≥4.5:1 */

  /* type */
  --font: "Archivo", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --step-5: clamp(2.4rem, 1.5rem + 4vw, 4.25rem);   /* hero h1 */
  --step-4: clamp(1.9rem, 1.4rem + 2vw, 2.75rem);   /* section h2 */
  --step-3: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem); /* h3 */
  --step-0: 1.0625rem;                              /* body */
  --step--1: 0.9375rem;
  --step--2: 0.8125rem;

  /* rhythm */
  --space-section: clamp(4.5rem, 3rem + 6vw, 8rem);
  --container: 72rem;

  /* z-scale */
  --z-header: 50;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.015em; text-wrap: balance; }
p { text-wrap: pretty; max-width: 68ch; }

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}
.on-dark :focus-visible { outline-color: var(--accent-bright); }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--navy); color: var(--on-navy);
  padding: 0.6rem 1rem; border-radius: 4px;
  z-index: calc(var(--z-header) + 1);
  transition: top 150ms ease-out;
}
.skip-link:focus { top: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5ch;
  min-height: 48px;
  padding: 0.7rem 1.5rem;
  font-weight: 600;
  font-size: var(--step--1);
  text-decoration: none;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: background-color 150ms ease-out, border-color 150ms ease-out, color 150ms ease-out;
}
.btn-primary { background: var(--navy); color: var(--on-navy); }
.btn-primary:hover { background: var(--navy-deep); }
.btn-light { background: var(--on-navy); color: var(--navy-deep); }
.btn-light:hover { background: #fff; }
.btn-outline { border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink); }
.on-dark .btn-outline { border-color: var(--navy-line); color: var(--on-navy); }
.on-dark .btn-outline:hover { border-color: var(--on-navy); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.5rem;
}
.brand img { height: 3rem; width: auto; }

.site-nav { display: flex; align-items: center; gap: 1.75rem; }
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--step--1);
  padding: 0.5rem 0;
}
.site-nav a:hover { color: var(--accent); }
.site-nav .btn { margin-left: 0.5rem; }
.site-nav a.btn-primary { color: var(--on-navy); }
.site-nav a.btn-primary:hover { color: var(--on-navy); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  color: var(--ink);
}
.nav-toggle svg { display: block; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

@media (max-width: 47.9rem) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1.25rem 1.25rem;
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    padding: 0.9rem 0.25rem;
    border-bottom: 1px solid var(--line);
    font-size: var(--step-0);
  }
  .site-nav a:last-of-type { border-bottom: 0; }
  .site-nav .btn { margin: 0.75rem 0 0; }
}

/* ---------- Hero ---------- */
.hero {
  background:
    linear-gradient(to right, oklch(1 0 0 / 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(1 0 0 / 0.035) 1px, transparent 1px),
    var(--navy-deep);
  background-size: 72px 72px, 72px 72px, auto;
  color: var(--on-navy);
  padding-block: var(--space-section);
}
.hero h1 {
  font-size: var(--step-5);
  font-weight: 700;
  max-width: 16ch;
}
.hero h1 em { font-style: normal; color: var(--accent-bright); }
.hero .lede {
  margin-top: 1.5rem;
  font-size: var(--step-3);
  font-weight: 400;
  line-height: 1.5;
  color: var(--on-navy-muted);
  max-width: 46ch;
}
.hero .cta-row {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}
.hero .sprint-note {
  margin-top: 2.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--navy-line);
  font-size: var(--step--1);
  color: var(--on-navy-muted);
  max-width: 52ch;
}
.hero .sprint-note strong { color: var(--on-navy); font-weight: 600; }

@media (prefers-reduced-motion: no-preference) {
  .hero h1, .hero .lede, .hero .cta-row, .hero .sprint-note {
    animation: rise 600ms cubic-bezier(0.16, 1, 0.3, 1) backwards;
  }
  .hero .lede { animation-delay: 90ms; }
  .hero .cta-row { animation-delay: 180ms; }
  .hero .sprint-note { animation-delay: 270ms; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

/* ---------- Sections ---------- */
.section { padding-block: var(--space-section); }
.section-alt { background: var(--surface); }

.section-head { margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem); }
.section-head h2 { font-size: var(--step-4); font-weight: 700; }
.section-head p { margin-top: 0.9rem; color: var(--muted); }

/* ---------- Products (spec-sheet rows) ---------- */
.product-list { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.product-row {
  display: grid;
  grid-template-columns: minmax(14rem, 1.1fr) 2fr auto;
  gap: 1rem 2.5rem;
  align-items: start;
  padding-block: 2rem;
  border-bottom: 1px solid var(--line);
}
.product-name h3 { font-size: var(--step-3); font-weight: 650; }
.product-tag {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
}
.product-desc { color: var(--muted); font-size: var(--step--1); align-self: center; }
.product-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.5rem;
  min-width: 13.5rem;
  align-self: center;
}
.product-actions .link-secondary {
  text-align: center;
  font-size: var(--step--1);
  font-weight: 500;
  padding: 0.45rem 0;
}

@media (max-width: 55rem) {
  .product-row { grid-template-columns: 1fr; gap: 0.9rem; }
  .product-actions { min-width: 0; max-width: 22rem; }
}

/* ---------- Services (ruled columns) ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 2.5rem;
}
.service {
  border-top: 2px solid var(--navy);
  padding-top: 1.5rem;
}
.service h3 { font-size: var(--step-3); font-weight: 650; }
.service .service-sub { margin-top: 0.6rem; color: var(--muted); font-size: var(--step--1); }
.service ul { list-style: none; padding: 0; margin-top: 1.25rem; }
.service li {
  position: relative;
  padding: 0.4rem 0 0.4rem 1.4rem;
  font-size: var(--step--1);
  color: var(--ink);
}
.service li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.95em;
  width: 0.5rem; height: 0.5rem;
  background: var(--navy);
}
.service .price {
  margin-top: 1.5rem;
  font-weight: 650;
  color: var(--navy);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(2.5rem, 2rem + 3vw, 5rem);
  align-items: start;
}
.about-grid h2 { font-size: var(--step-4); font-weight: 700; max-width: 18ch; }
.about-grid .about-copy { margin-top: 1.25rem; color: var(--muted); }
.fact-list {
  list-style: none;
  padding: 2rem;
  background: var(--navy-deep);
  color: var(--on-navy);
}
.fact-list li {
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--navy-line);
  font-weight: 500;
}
.fact-list li:last-child { border-bottom: 0; }
.fact-list li span { display: block; font-weight: 400; font-size: var(--step--1); color: var(--on-navy-muted); margin-top: 0.15rem; }

@media (max-width: 55rem) {
  .about-grid { grid-template-columns: 1fr; }
}

/* ---------- Contact page ---------- */
.contact-hero {
  text-align: center;
  padding-block: var(--space-section);
}
.contact-hero h1 { font-size: var(--step-4); font-weight: 700; }
.contact-hero > .container > p { margin: 1rem auto 0; color: var(--muted); }
.contact-card {
  margin: 3rem auto 0;
  max-width: 26rem;
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 2.5rem 2rem;
}
.contact-card a {
  font-size: var(--step-3);
  font-weight: 650;
  word-break: break-word;
}
.contact-card p { margin: 0.6rem auto 0; color: var(--muted); font-size: var(--step--1); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-deep);
  color: var(--on-navy);
  padding-block: var(--space-section) 2.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2.5rem;
}
.site-footer img { height: 3rem; width: auto; filter: brightness(0) invert(1); }
.site-footer .footer-about { margin-top: 1.25rem; font-size: var(--step--1); color: var(--on-navy-muted); max-width: 34ch; }
.site-footer h2 { font-size: var(--step--1); font-weight: 650; letter-spacing: 0.01em; }
.site-footer ul { list-style: none; padding: 0; margin-top: 1rem; }
.site-footer ul li { padding-block: 0.3rem; }
.site-footer ul a { color: var(--on-navy-muted); text-decoration: none; font-size: var(--step--1); }
.site-footer ul a:hover { color: var(--on-navy); text-decoration: underline; }
.footer-meta {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--navy-line);
  font-size: var(--step--1);
  color: var(--on-navy-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: space-between;
}
.footer-meta a { color: var(--accent-bright); }