/* ============================================================
   XINON Design System — base.css
   Swiss-style / minimal / technical. Single source of truth.
   Palette + type from DESIGN.md (Stitch) + verified brand colors.
   Used by all four sites: xinon.at / xinon.eu / xinon.systems /
   xinon.international. No build step, no CDN.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* Surfaces */
  --surface: #f1fbff;
  --surface-dim: #cfdce1;
  --surface-bright: #f1fbff;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #e9f6fb;
  --surface-container: #e3f0f5;
  --surface-container-high: #deeaef;
  --surface-container-highest: #d8e5e9;
  --surface-variant: #d8e5e9;
  --surface-tint: #206294;

  /* Text */
  --on-surface: #121d21;
  --on-surface-variant: #41474f;
  --on-background: #121d21;
  --inverse-surface: #273236;
  --inverse-on-surface: #e6f3f8;

  /* Primary (dark blue) */
  --primary: #003b60;
  --on-primary: #ffffff;
  --primary-container: #005384;
  --on-primary-container: #8dc7fe;
  --inverse-primary: #97cbff;
  --primary-fixed: #cee5ff;
  --primary-fixed-dim: #97cbff;
  --on-primary-fixed: #001d33;
  --on-primary-fixed-variant: #004a77;

  /* Secondary (brand yellow) */
  --secondary: #765a00;
  --on-secondary: #ffffff;
  --secondary-container: #fec720;
  --on-secondary-container: #6e5400;
  --secondary-fixed: #ffdf95;
  --secondary-fixed-dim: #f4bf13;
  --on-secondary-fixed: #251a00;
  --on-secondary-fixed-variant: #594400;

  /* Tertiary (interactive blue) */
  --tertiary: #003d53;
  --on-tertiary: #ffffff;
  --tertiary-container: #005672;
  --on-tertiary-container: #60cdff;
  --tertiary-fixed: #c1e8ff;
  --tertiary-fixed-dim: #73d2ff;
  --on-tertiary-fixed: #001e2b;
  --on-tertiary-fixed-variant: #004d66;

  /* Brand accents (verified from logo/live site) */
  --xinon-blue: #005384;
  --xinon-yellow: #FBC51D;
  --xinon-ui-blue: #44bef1;

  /* Outline */
  --outline: #717880;
  --outline-variant: #c1c7d0;

  /* Error */
  --error: #ba1a1a;
  --on-error: #ffffff;
  --error-container: #ffdad6;
  --on-error-container: #93000a;

  /* Type */
  --font-sans: "Hanken Grotesk", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

  /* Spacing (8px base) */
  --sp-xs: 4px;
  --sp-sm: 12px;
  --sp-base: 8px;
  --sp-md: 24px;
  --sp-lg: 48px;
  --sp-xl: 80px;
  --gutter: 24px;
  --container-max: 1280px;

  /* Radius */
  --r-sm: 0.125rem;
  --r: 0.25rem;
  --r-md: 0.375rem;
  --r-lg: 0.5rem;
  --r-xl: 0.75rem;
  --r-full: 9999px;

  /* Elevation */
  --shadow-card: 0 10px 30px rgba(0, 59, 96, 0.14);
  --shadow-nav: 0 1px 0 var(--outline-variant);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--on-surface);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--xinon-ui-blue); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary); }
h1, h2, h3, h4 { line-height: 1.15; color: var(--primary); font-weight: 800; letter-spacing: -0.01em; }
p { line-height: 1.6; }
address { font-style: normal; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; padding: 0; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.section { padding-top: var(--sp-xl); padding-bottom: var(--sp-xl); }
.section-sm { padding-top: var(--sp-lg); padding-bottom: var(--sp-lg); }
main { flex: 1 1 auto; }

/* ---------- Typography helpers ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--secondary-container);
  display: inline-block;
  margin-bottom: var(--sp-sm);
}
.label-caps {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.h-display { font-size: clamp(30px, 5vw, 48px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.08; }
.h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; }
.h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 700; letter-spacing: -0.01em; line-height: 1.15; }
.h3 { font-size: 24px; font-weight: 700; line-height: 1.2; }
.lead { font-size: 18px; line-height: 1.6; color: var(--on-surface-variant); }
.body-md { font-size: 16px; }
.body-sm { font-size: 14px; }
.text-muted { color: var(--on-surface-variant); }
.text-primary { color: var(--primary); }
.text-yellow { color: var(--secondary-fixed-dim); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-base);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 20px;
  border-radius: var(--r);
  border: 2px solid transparent;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--primary-container); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary); color: var(--on-primary); }
.btn-secondary { background: var(--secondary-container); color: var(--on-secondary-container); }
.btn-secondary:hover { background: var(--secondary-fixed-dim); color: var(--on-secondary-container); }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--primary-container); }
.btn-ghost:hover { background: var(--primary-container); color: var(--on-primary); }
.btn-light { background: var(--on-primary); color: var(--primary-container); }
.btn-light:hover { background: var(--primary-fixed); color: var(--on-primary-fixed); }

/* ---------- Top nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface-container-lowest);
  border-bottom: 1px solid var(--outline-variant);
}
.site-nav .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
  overflow: hidden;
}
.nav-logo img { height: 32px; width: auto; }
.nav-right { display: flex; align-items: center; gap: var(--sp-md); position: relative; z-index: 1; }
.nav-deco {
  position: absolute;
  top: 0; right: 0;
  width: 256px; height: 100%;
  background: var(--secondary-container);
  transform: skewX(-30deg) translateX(48px);
  opacity: .2;
  z-index: 0;
}
.nav-links { display: flex; align-items: center; gap: var(--sp-md); }
.nav-links a {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--on-surface);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--primary); border-bottom-color: var(--xinon-ui-blue); }
.nav-links a.active { color: var(--primary); border-bottom-color: var(--xinon-ui-blue); }
.lang-toggle {
  display: flex; align-items: center; gap: 4px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  user-select: none;
}
.lang-toggle button {
  background: none; border: none; padding: 2px 4px;
  color: var(--on-surface-variant); font-family: var(--font-mono);
  font-size: 12px; font-weight: 700; transition: color .2s;
}
.lang-toggle button:hover { color: var(--secondary-fixed-dim); }
.lang-toggle button.active { color: var(--secondary-fixed-dim); }
.lang-toggle .sep { color: var(--outline-variant); }
.nav-burger { display: none; background: none; border: none; color: var(--primary); font-size: 24px; }

/* ---------- Hero (slanted, fiber pattern) ---------- */
.hero {
  position: relative;
  background: var(--primary-container);
  color: var(--on-primary);
  padding-top: var(--sp-xl);
  padding-bottom: var(--sp-xl);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 95%);
}
.hero .fiber-pattern { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.hero .hero-deco {
  position: absolute; top: 0; right: 0;
  width: 33.333%; height: 100%;
  background: var(--secondary-container);
  transform: skewX(-20deg) translateX(25%);
  opacity: .1; z-index: 0;
}
.hero .hero-inner { position: relative; z-index: 1; padding-top: var(--sp-lg); padding-bottom: var(--sp-xl); }
.hero .eyebrow { color: var(--secondary-container); }
.hero h1 { color: var(--on-primary); text-transform: uppercase; letter-spacing: -0.02em; max-width: 46rem; margin-bottom: var(--sp-xs); }
.hero .h1-sub {
  color: var(--secondary-fixed-dim);
  font-size: clamp(20px, 2.6vw, 32px);
  font-weight: 700; text-transform: uppercase; letter-spacing: -0.01em;
  max-width: 46rem; opacity: .92; margin-bottom: var(--sp-md);
}
.hero .hero-box {
  max-width: 48rem;
  background: rgba(0, 59, 96, 0.4);
  border-left: 4px solid var(--secondary-container);
  border-radius: var(--r-lg);
  padding: var(--sp-md);
  backdrop-filter: blur(4px);
  display: flex; flex-direction: column; gap: var(--sp-sm);
}
.hero .hero-box p { color: rgba(255,255,255,.9); font-size: 18px; }
.hero .hero-box .hero-cta-line {
  font-weight: 700; color: var(--secondary-fixed);
  text-transform: uppercase; letter-spacing: .04em; padding-top: var(--sp-xs);
}
.hero .hero-actions { display: flex; flex-wrap: wrap; gap: var(--sp-sm); margin-top: var(--sp-md); }

/* ---------- Cards grid ---------- */
.cards-section { position: relative; z-index: 2; margin-top: -32px; }
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}
.card {
  display: flex;
  flex-direction: column;
  background: var(--surface-container-lowest);
  border: 2px solid var(--outline-variant);
  border-radius: var(--r);
  padding: var(--sp-md);
  position: relative;
  overflow: hidden;
  color: inherit;
  transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}
.card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 8px;
  background: var(--secondary-container);
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.card:hover { border-color: var(--secondary-container); box-shadow: var(--shadow-card); transform: translateY(-3px); color: inherit; }
.card:hover::before { transform: scaleX(1); }
.card .card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: var(--sp-sm); }
.card .card-title { font-size: 24px; font-weight: 700; color: var(--primary); }
.card .card-arrow { color: var(--outline-variant); font-size: 22px; transition: color .3s, transform .3s; }
.card:hover .card-arrow { color: var(--secondary-fixed-dim); transform: translateX(4px); }
.card .card-desc { font-size: 16px; color: var(--on-surface); font-weight: 500; margin-bottom: var(--sp-md); }
.card .card-desc .sub { display: block; font-size: 14px; color: var(--on-surface-variant); font-weight: 400; margin-top: 4px; }
.card .tags { display: flex; flex-wrap: wrap; gap: var(--sp-xs); margin-top: auto; }
.tag {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  background: var(--surface-variant);
  color: var(--on-surface-variant);
  border-radius: var(--r-sm);
  padding: 4px 8px;
}

/* ---------- Feature / content blocks ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-lg); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-md); }
.feature {
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--r-lg);
  padding: var(--sp-md);
}
.feature .f-icon {
  width: 44px; height: 44px; border-radius: var(--r-md);
  background: var(--primary-container); color: var(--on-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: var(--sp-sm);
}
.feature h3 { font-size: 18px; margin-bottom: var(--sp-xs); }
.feature p { font-size: 15px; color: var(--on-surface-variant); }

/* ---------- Stat band ---------- */
.stat-band { background: var(--primary-container); color: var(--on-primary); }
.stat-band .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-md); text-align: center; }
.stat .stat-num { font-size: 40px; font-weight: 800; color: var(--secondary-container); line-height: 1; }
.stat .stat-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--on-primary-container); margin-top: var(--sp-xs); }

/* ---------- Pricing / tariff cards ---------- */
.tariffs { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-md); }
.tariff {
  background: var(--surface-container-lowest);
  border: 2px solid var(--outline-variant);
  border-radius: var(--r-lg);
  padding: var(--sp-md);
  display: flex; flex-direction: column;
  transition: border-color .2s, box-shadow .2s;
}
.tariff:hover { border-color: var(--xinon-ui-blue); box-shadow: var(--shadow-card); }
.tariff.featured { border-color: var(--secondary-container); }
.tariff .t-speed { font-size: 34px; font-weight: 800; color: var(--primary); line-height: 1; }
.tariff .t-speed small { font-size: 14px; font-weight: 600; color: var(--on-surface-variant); }
.tariff .t-name { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--on-surface-variant); margin: 6px 0 var(--sp-sm); }
.tariff .t-price { font-size: 26px; font-weight: 800; color: var(--primary); }
.tariff .t-price small { font-size: 13px; font-weight: 500; color: var(--on-surface-variant); }
.tariff .t-vat { font-size: 11px; color: var(--on-surface-variant); margin-bottom: var(--sp-sm); }
.tariff ul { margin: var(--sp-sm) 0 var(--sp-md); display: flex; flex-direction: column; gap: 6px; }
.tariff ul li { font-size: 14px; color: var(--on-surface); padding-left: 22px; position: relative; }
.tariff ul li::before { content: "✓"; position: absolute; left: 0; color: var(--xinon-ui-blue); font-weight: 700; }
.tariff .btn { margin-top: auto; justify-content: center; }
.badge-pop {
  position: absolute; top: -12px; right: 16px;
  background: var(--secondary-container); color: var(--on-secondary-container);
  font-family: var(--font-mono); font-size: 10px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; padding: 4px 10px; border-radius: var(--r-full);
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--outline-variant); border-radius: var(--r-lg); }
table.data { width: 100%; border-collapse: collapse; background: var(--surface-container-lowest); font-size: 15px; }
table.data th {
  background: var(--surface-container); color: var(--primary);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  text-align: left; padding: 12px 16px; border-bottom: 2px solid var(--outline-variant);
}
table.data td { padding: 12px 16px; border-bottom: 1px solid var(--surface-container-high); color: var(--on-surface); }
table.data tr:last-child td { border-bottom: none; }
table.data td.k { font-family: var(--font-mono); font-size: 13px; color: var(--on-surface-variant); }
table.data td.v { font-weight: 600; }

/* ---------- CTA band ---------- */
.cta-band { background: linear-gradient(120deg, var(--primary-container), var(--primary)); color: var(--on-primary); }
.cta-band .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-md); flex-wrap: wrap; }
.cta-band h2 { color: var(--on-primary); }
.cta-band p { color: var(--on-primary-container); max-width: 40rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--primary-container); color: var(--on-primary-container); position: relative; overflow: hidden; margin-top: auto; }
.site-footer .footer-bar { position: absolute; bottom: 0; left: 0; right: 0; height: 16px; background: var(--secondary-container); }
.site-footer .footer-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--sp-lg);
  padding-top: var(--sp-xl); padding-bottom: var(--sp-xl);
}
.site-footer .f-logo img { height: 40px; width: auto; opacity: .92; margin-bottom: var(--sp-md); }
.site-footer address { font-size: 16px; line-height: 1.7; color: rgba(141,199,254,.85); }
.site-footer h4 { font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--secondary-container); margin-bottom: var(--sp-sm); }
.site-footer .f-contact p { font-size: 16px; color: rgba(141,199,254,.85); margin-bottom: 8px; }
.site-footer nav { display: flex; flex-direction: column; gap: 8px; }
.site-footer nav a { color: rgba(141,199,254,.85); font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }
.site-footer nav a:hover { color: var(--on-primary); text-decoration: underline; }
.site-footer .f-copy { margin-top: var(--sp-lg); padding-top: var(--sp-md); border-top: 1px solid rgba(255,255,255,.15); font-family: var(--font-mono); font-size: 12px; color: rgba(141,199,254,.6); }

/* ---------- Utility ---------- */
.mt-sm { margin-top: var(--sp-sm); } .mt-md { margin-top: var(--sp-md); } .mt-lg { margin-top: var(--sp-lg); }
.mb-sm { margin-bottom: var(--sp-sm); } .mb-md { margin-bottom: var(--sp-md); } .mb-lg { margin-bottom: var(--sp-lg); }
.center { text-align: center; }
.flex { display: flex; } .wrap { flex-wrap: wrap; } .gap-sm { gap: var(--sp-sm); } .gap-md { gap: var(--sp-md); }
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .tariffs { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; gap: var(--sp-md); }
  .stat-band .stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  :root { --sp-xl: 56px; --sp-lg: 32px; }
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .cards { grid-template-columns: 1fr; }
  .tariffs { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .stat-band .stats { grid-template-columns: 1fr 1fr; }
  .site-footer .footer-inner { grid-template-columns: 1fr; gap: var(--sp-md); }
  .hero { clip-path: none; }
  .cards-section { margin-top: 0; }
  .cta-band .cta-inner { flex-direction: column; align-items: flex-start; }
}
/* Mobile nav drawer */
@media (max-width: 767px) {
  .nav-links.open {
    display: flex; flex-direction: column; align-items: flex-start;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--surface-container-lowest);
    border-bottom: 1px solid var(--outline-variant);
    padding: var(--sp-md); gap: var(--sp-sm);
    box-shadow: var(--shadow-card);
  }
}