/* ========================================================
   STRATLOGIC OÜ — Defence/Industrial Design System
   ======================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Syne:wght@500;600;700;800&family=Inter+Tight:wght@300;400;500;600&display=swap');

:root {
  /* Core palette — deep navy + military green + bone */
  --navy-900: #0a1418;
  --navy-800: #0f1f26;
  --navy-700: #142932;
  --navy-600: #1c3640;
  --navy-500: #28505e;
  --olive-600: #3d4f2f;
  --olive-500: #556b3d;
  --olive-400: #6b8050;
  --accent: #c9d4a6;       /* dusty sage */
  --bone: #e8e4d8;
  --bone-dim: #c4bfae;
  --rust: #b85a3d;         /* warning/accent rust */
  --grid: rgba(201, 212, 166, 0.08);
  --border: rgba(201, 212, 166, 0.18);
  --border-strong: rgba(201, 212, 166, 0.35);

  --font-display: 'Syne', serif;
  --font-body: 'Inter Tight', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-w: 1280px;
  --pad: clamp(1.5rem, 4vw, 3rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--navy-900);
  color: var(--bone);
  line-height: 1.5;
  font-weight: 300;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  min-height: 100vh;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: -1px -1px;
}

::selection { background: var(--accent); color: var(--navy-900); }

/* ========================================================
   NAVIGATION
   ======================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0.75rem var(--pad);
  background: rgba(10, 20, 24, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo {
  height: 60px;
  width: auto;
  display: block;
  /* The logo is dark olive on transparent; brighten it slightly for dark bg */
  filter: brightness(1.15) saturate(1.1);
  transition: filter 0.25s;
}
.nav-brand:hover .nav-logo {
  filter: brightness(1.3) saturate(1.2);
}

.nav-brand-mark {
  width: 14px;
  height: 14px;
  background: var(--accent);
  position: relative;
}
.nav-brand-mark::before {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--navy-900);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--bone-dim);
  text-decoration: none;
  position: relative;
  padding: 0.3rem 0;
  transition: color 0.25s;
}

.nav-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}
.nav-links a:hover::before,
.nav-links a.active::before {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
}
.lang-switch button {
  background: none;
  border: none;
  color: var(--bone-dim);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  padding: 0.25rem 0.3rem;
  transition: color 0.2s;
  font-weight: 500;
}
.lang-switch button:hover { color: var(--accent); }
.lang-switch button.active { color: var(--accent); }
.lang-divider {
  color: var(--border-strong);
  font-size: 0.85rem;
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border: 1px solid var(--border-strong);
  color: var(--accent);
  padding: 0.55rem 1.1rem;
  text-decoration: none;
  transition: all 0.25s;
}
.nav-cta:hover {
  background: var(--accent);
  color: var(--navy-900);
  border-color: var(--accent);
}

/* Mobile nav */
.nav-toggle { display: none; }

@media (max-width: 820px) {
  .nav-toggle {
    display: block;
    background: none;
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 0.4rem 0.7rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
  }
  .nav-links { display: none; }
  .nav-right .nav-cta { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--navy-800);
    padding: 1.5rem var(--pad);
    border-bottom: 1px solid var(--border);
    gap: 1.2rem;
  }
}

/* ========================================================
   MAIN / SECTIONS
   ======================================================== */
main {
  padding-top: 5.5rem;
}

section {
  padding: clamp(4rem, 8vw, 7rem) var(--pad);
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.section-label::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--bone);
  margin-bottom: 1.5rem;
  max-width: 22ch;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--bone-dim);
  max-width: 60ch;
  line-height: 1.65;
  margin-bottom: 3rem;
}

/* ========================================================
   FOOTER
   ======================================================== */
footer {
  border-top: 1px solid var(--border);
  background: var(--navy-800);
  padding: 4rem var(--pad) 2rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  margin-bottom: 0.8rem;
  color: var(--bone);
}
.footer-logo {
  height: 36px;
  width: auto;
  display: block;
  margin-bottom: 1rem;
  filter: brightness(1.15) saturate(1.1);
}
.footer-brand p {
  font-size: 0.9rem;
  color: var(--bone-dim);
  max-width: 30ch;
  line-height: 1.6;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 1.2rem;
  font-weight: 500;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.7rem; }
.footer-col a {
  font-size: 0.9rem;
  color: var(--bone-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--bone-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (max-width: 720px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; }
}

/* ========================================================
   BUTTONS
   ======================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 1rem 1.8rem;
  text-decoration: none;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--navy-900);
  transition: all 0.25s;
  cursor: pointer;
  font-weight: 500;
}
.btn:hover {
  background: transparent;
  color: var(--accent);
}
.btn-ghost {
  background: transparent;
  color: var(--accent);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  background: var(--accent);
  color: var(--navy-900);
  border-color: var(--accent);
}
.btn-arrow {
  font-family: var(--font-mono);
  display: inline-block;
  transition: transform 0.25s;
}
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ========================================================
   ANIMATIONS
   ======================================================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes scanline {
  from { transform: translateY(-100%); }
  to { transform: translateY(100vh); }
}

.fade-up { animation: fadeUp 0.8s ease forwards; opacity: 0; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.25s; }
.delay-3 { animation-delay: 0.4s; }
.delay-4 { animation-delay: 0.55s; }
.delay-5 { animation-delay: 0.7s; }