/* ==========================================================
   Informatika OIC — Design System
   Brand: deep institutional blue + amber accent
   ========================================================== */

:root {
  /* Brand */
  --ink: #0a1530;
  --ink-2: #1a2542;
  --ink-3: #475174;
  --ink-4: #8893b3;
  --line: #e3e6ee;
  --line-2: #eef0f6;
  --bg: #fbfbfd;
  --paper: #ffffff;
  --paper-warm: #faf8f3;

  --primary: #1f57a0;           /* Informatika blue */
  --primary-2: #174386;
  --primary-tint: #e8f0f8;
  --primary-tint-2: #f2f6fb;

  --accent: oklch(62% 0.12 240);      /* light blue */
  --accent-2: oklch(50% 0.12 240);
  --accent-tint: oklch(95% 0.04 240);

  --ok: oklch(58% 0.13 155);
  --warn: oklch(65% 0.16 50);

  /* Type */
  --f-display: "Inter Tight", "Helvetica Neue", system-ui, sans-serif;
  --f-body: "Inter", "Helvetica Neue", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Spacing */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 22px;

  --shadow-sm: 0 1px 2px rgba(10, 21, 48, 0.04), 0 1px 3px rgba(10, 21, 48, 0.06);
  --shadow-md: 0 2px 8px rgba(10, 21, 48, 0.06), 0 8px 24px rgba(10, 21, 48, 0.06);
  --shadow-lg: 0 8px 32px rgba(10, 21, 48, 0.08), 0 24px 48px rgba(10, 21, 48, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--f-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--f-display);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
  font-weight: 600;
}

h1 { font-size: clamp(40px, 5vw, 72px); letter-spacing: -0.035em; font-weight: 600; }
h2 { font-size: clamp(28px, 3vw, 44px); letter-spacing: -0.025em; }
h3 { font-size: 22px; letter-spacing: -0.015em; }
h4 { font-size: 16px; letter-spacing: -0.01em; }

p { line-height: 1.6; color: var(--ink-2); margin: 0; text-wrap: pretty; }

.mono { font-family: var(--f-mono); font-feature-settings: "ss02"; }

/* ============== TOP BAR ============== */
.topbar {
  background: var(--ink);
  color: rgba(255,255,255,0.78);
  font-size: 12.5px;
  letter-spacing: 0.01em;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.topbar-inner {
  max-width: 1340px; margin: 0 auto;
  padding: 9px 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.topbar a { color: inherit; opacity: 0.85; }
.topbar a:hover { opacity: 1; }
.topbar-links { display: flex; gap: 22px; align-items: center; }
.topbar-langs { display: flex; gap: 14px; align-items: center; font-family: var(--f-mono); font-size: 11px; }
.topbar-langs .active { color: white; }

/* ============== MAIN NAV ============== */
.mainnav {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(12px);
  background: rgba(255,255,255,0.92);
}
.mainnav-inner {
  max-width: 1340px; margin: 0 auto;
  padding: 16px 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px;
}
.brand {
  display: flex; align-items: flex-start; gap: 8px;
  font-family: var(--f-display);
  font-weight: 600; letter-spacing: -0.02em;
}
.brand-mark {
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: 9px;
  display: grid; place-items: center;
  color: white; font-family: var(--f-display);
  font-size: 18px; font-weight: 700;
  letter-spacing: -0.04em;
}
.brand-logo {
  height: 31px; width: auto;
  object-fit: contain;
  display: block;
}
.brand-name { font-size: 18px; line-height: 1; }
.brand-tag { font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.12em; margin-top: 3px; }

.nav-links {
  display: flex; gap: 4px; align-items: center;
}
.nav-links a {
  font-size: 14.5px; font-weight: 500;
  color: var(--ink-2);
  padding: 8px 14px;
  border-radius: var(--r-sm);
  display: flex; align-items: center; gap: 8px;
  transition: background 0.12s, color 0.12s;
}
.nav-links a:hover { background: var(--primary-tint-2); color: var(--primary); }
.nav-links a.active {
  color: var(--primary);
  background: var(--primary-tint);
}
.nav-links svg { width: 16px; height: 16px; flex-shrink: 0; }

.nav-cta {
  display: flex; gap: 10px; align-items: center;
}

/* ============== BUTTONS ============== */
.btn {
  font-family: var(--f-body); font-weight: 500; font-size: 14.5px;
  padding: 11px 18px; border-radius: var(--r-md);
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer; border: 1px solid transparent;
  transition: all 0.14s ease;
  letter-spacing: -0.005em;
}
.btn-primary {
  background: var(--primary); color: white;
}
.btn-primary:hover { background: var(--primary-2); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent; color: var(--ink); border-color: var(--line);
}
.btn-ghost:hover { background: var(--paper); border-color: var(--ink-3); }
.btn-white {
  background: white; color: var(--ink); border-color: white;
}
.btn-white:hover { background: rgba(255,255,255,0.88); border-color: rgba(255,255,255,0.88); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-accent {
  background: var(--ink); color: white;
}
.btn-accent:hover { background: var(--ink-2); }
.btn-sm { padding: 7px 12px; font-size: 13px; }
.btn-lg { padding: 14px 24px; font-size: 15.5px; }

/* ============== CHIPS / TAGS ============== */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 500;
  background: var(--paper); border: 1px solid var(--line);
  color: var(--ink-2);
  font-family: var(--f-mono);
  letter-spacing: 0;
}
.chip-solid { background: var(--ink); color: white; border-color: var(--ink); }
.chip-blue { background: var(--primary-tint); color: var(--primary); border-color: transparent; }
.chip-amber { background: var(--accent-tint); color: var(--accent-2); border-color: transparent; }
.chip-dot::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: currentColor; opacity: 0.7;
}

/* ============== LAYOUT ============== */
.container {
  max-width: 1340px; margin: 0 auto; padding: 0 32px;
}
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }

.eyebrow {
  font-family: var(--f-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--accent-2);
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px; background: var(--accent-2);
}

/* ============== CARDS ============== */
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.2s;
}
.card:hover { border-color: var(--ink-4); box-shadow: var(--shadow-md); }

/* ============== FOOTER ============== */
.footer {
  background: var(--ink);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 32px;
}
.footer-inner { max-width: 1340px; margin: 0 auto; padding: 0 32px; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px; margin-bottom: 48px;
}
.footer h4 { color: white; margin-bottom: 16px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 600; }
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.footer a:hover { color: white; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px;
  font-size: 12.5px; color: rgba(255,255,255,0.55);
}

/* ============== UTILITY ============== */
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }
.text-ink-3 { color: var(--ink-3); }
.text-mono { font-family: var(--f-mono); }
.flex { display: flex; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.mb-10 { margin-bottom: 40px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }

/* placeholder image with subtle stripes */
.ph {
  background:
    repeating-linear-gradient(135deg, rgba(11,59,122,0.05) 0 1px, transparent 1px 14px),
    var(--primary-tint-2);
  display: grid; place-items: center;
  color: var(--ink-3); font-family: var(--f-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.1em;
  text-align: center;
}
.ph-dark {
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.05) 0 1px, transparent 1px 14px),
    var(--ink);
  color: rgba(255,255,255,0.5);
}

/* focusable */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}