/* SIA-OS site v1 : static CSS, no external resources, system fonts only. */

:root {
  --bg: #f7f7f4;
  --surface: #ffffff;
  --text: #16202e;
  --muted: #475264;
  --line: #d6dbe2;
  --accent: #0b5d5b;
  --accent-hover: #084644;
  --on-accent: #ffffff;
  --dark: #10202e;
  --on-dark: #f3f5f7;
  --on-dark-muted: #c9d3dd;
  --on-dark-accent: #8fdcd5;
  --focus: #1d4ed8;
  --focus-on-dark: #ffd166;
  --radius: 10px;
  --wrap: 72rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

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

h1, h2, h3 { line-height: 1.2; margin: 0 0 .75rem; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 5vw + .5rem, 3.1rem); }
h2 { font-size: clamp(1.5rem, 2.5vw + .6rem, 2.1rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.08rem; line-height: 1.25; margin: 0 0 .5rem; font-weight: 700; }
p { margin: 0 0 1rem; }

a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--accent-hover); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}
.on-dark :focus-visible { outline-color: var(--focus-on-dark); }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: .6rem 1rem;
  background: var(--surface);
  color: var(--text);
  border: 2px solid var(--focus);
  border-radius: var(--radius);
}
.skip-link:focus { top: 1rem; }

.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;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  padding-top: .9rem;
  padding-bottom: .9rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: .04em;
  color: var(--text);
  text-decoration: none;
}
.brand:hover { color: var(--text); }
.brand svg { width: 30px; height: 30px; }

.nav-group { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.25rem; }
.main-nav ul, .lang-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem 1rem; }
.main-nav a { color: var(--text); text-decoration: none; padding: .35rem 0; display: inline-block; }
.main-nav a:hover { color: var(--accent); text-decoration: underline; }

.lang-nav ul { gap: .25rem; border: 1px solid var(--line); border-radius: 999px; padding: .15rem; }
.lang-nav a, .lang-nav span {
  display: inline-block;
  min-width: 2.6rem;
  text-align: center;
  padding: .25rem .6rem;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
}
.lang-nav a { color: var(--text); }
.lang-nav a:hover { background: var(--bg); color: var(--accent); }
.lang-nav [aria-current] { background: var(--accent); color: var(--on-accent); }

/* Hero */
.hero { background: var(--dark); color: var(--on-dark); padding: 3.5rem 0 3.75rem; }
.hero .eyebrow {
  font-family: var(--mono);
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--on-dark-accent);
  margin-bottom: 1rem;
}
.hero h1 { max-width: 22ch; }
.hero .lead { font-size: 1.15rem; color: var(--on-dark-muted); max-width: 60ch; margin-bottom: 1.75rem; }
.hero a:not(.btn) { color: var(--on-dark-accent); }

.actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .65rem 1.2rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  font-weight: 700;
  text-decoration: none;
}
.btn-primary { background: var(--on-dark-accent); color: var(--dark); }
.btn-primary:hover { background: #b5ebe6; color: var(--dark); }
.btn-ghost { border-color: var(--on-dark-muted); color: var(--on-dark); }
.btn-ghost:hover { border-color: var(--on-dark); color: var(--on-dark); background: rgba(255, 255, 255, .06); }
.btn-solid { background: var(--accent); color: var(--on-accent); }
.btn-solid:hover { background: var(--accent-hover); color: var(--on-accent); }

/* Sections */
.section { padding: 3.5rem 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-intro { color: var(--muted); max-width: 62ch; margin-bottom: 2rem; }

.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; grid-template-columns: 1fr; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.3rem;
}
.card .num {
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: .4rem;
}
.card p { color: var(--muted); margin-bottom: 0; }
.card p + p { margin-top: .75rem; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; grid-template-columns: 1fr; counter-reset: step; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 1.2rem 1.2rem 1.2rem 4rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 1.2rem;
  top: 1.15rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  display: grid;
  place-items: center;
}
.steps h3 { margin-bottom: .35rem; }
.steps p { color: var(--muted); margin: 0; }

.contact-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.6rem 1.4rem;
  max-width: 46rem;
}
.contact-mail {
  display: inline-block;
  font-size: clamp(1.2rem, 3vw + .5rem, 1.7rem);
  font-weight: 700;
  word-break: break-word;
  margin: .25rem 0 1rem;
}
.contact-box ul { margin: 0 0 1.25rem; padding-left: 1.2rem; color: var(--muted); }

/* Service families */
.family + .family { margin-top: 2.5rem; }
.family > h3 {
  font-size: 1.3rem;
  padding-bottom: .5rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.family-closing .cards { grid-template-columns: 1fr; max-width: 46rem; }

/* Legal pages */
.legal { padding: 2.5rem 0 3.5rem; }
.legal .wrap { max-width: 48rem; }
.legal h1 { font-size: clamp(1.7rem, 3vw + .6rem, 2.4rem); }
.legal h2 { font-size: 1.3rem; margin-top: 2rem; }
.legal dl { display: grid; grid-template-columns: 1fr; gap: .15rem 1.5rem; margin: 0 0 1rem; }
.legal dt { font-weight: 700; margin-top: .6rem; }
.legal dd { margin: 0; color: var(--muted); }
.legal ul { padding-left: 1.2rem; }
.legal .updated { color: var(--muted); font-size: .95rem; }
.todo { background: #fff3cd; color: #5c4400; padding: 0 .25rem; border-radius: 3px; font-weight: 600; }

/* Footer */
.site-footer { background: var(--dark); color: var(--on-dark-muted); padding: 2rem 0; font-size: .95rem; }
.site-footer p { margin: 0 0 .5rem; }
.site-footer a { color: var(--on-dark); }
.site-footer a:hover { color: var(--on-dark-accent); }
.footer-links { list-style: none; margin: .75rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }

@media (min-width: 40rem) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .legal dl { grid-template-columns: 14rem 1fr; }
  .legal dt { margin-top: 0; }
  .hero { padding: 5rem 0 5.25rem; }
  .section { padding: 4.5rem 0; }
}

@media (min-width: 64rem) {
  .cards { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .steps li { padding: 4rem 1.2rem 1.3rem; }
  .steps li::before { top: 1.2rem; }
}

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

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