/* ============================================================
   BSt Next GmbH — Design System
   Navy #0B2545 · Lime #4D7C0F/#A3E635 · Archivo Black + Inter
   ============================================================ */

@font-face {
  font-family: 'Archivo Black';
  src: url('./assets/fonts/ArchivoBlack-Regular.ttf') format('truetype');
  font-weight: 900;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('./assets/fonts/Inter-Variable.ttf') format('truetype-variations');
  font-weight: 100 900;
  font-display: swap;
}

:root {
  /* Color tokens */
  --navy-900: #0B2545;
  --navy-700: #15355F;
  --navy-500: #1E4A8A;
  --navy-100: #E8F0F8;
  --lime-700: #365314;
  --lime-600: #4D7C0F;
  --lime-400: #6ABF1E;
  --lime-300: #A3E635;
  --lime-100: #ECFCCB;
  --paper:    #F8FAFC;
  --paper-warm: #F5F4EF;
  --ink:      #15191F;
  --ink-soft: #4B5563;
  --line:     #DDE3EA;
  --white:    #FFFFFF;

  /* Type */
  --font-display: 'Archivo Black', Arial, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 144px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --max-width: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 720px) {
  .wrap { padding: 0 var(--space-4); }
}

/* ── Typography ── */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--navy-900);
}

h1 { font-size: clamp(2.4rem, 5vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p { color: var(--ink-soft); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime-600);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--lime-600);
  display: inline-block;
}

.lede {
  font-size: 1.18rem;
  color: var(--ink-soft);
  max-width: 56ch;
}

/* ── Header / Nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link svg { height: 26px; width: auto; }

.main-nav { display: flex; align-items: center; gap: var(--space-7); }

.main-nav ul {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.main-nav ul a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy-900);
  position: relative;
  padding: 4px 0;
}

.main-nav ul a.active::after,
.main-nav ul a:hover::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--lime-600);
}

.nav-toggle-input { display: none; }

.nav-toggle-label {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 26px;
  cursor: pointer;
  z-index: 110;
}
.nav-toggle-label span {
  display: block;
  height: 2.5px;
  background: var(--navy-900);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.mobile-cta { display: none; }

.mobile-menu { display: none; }

@media (max-width: 860px) {
  .main-nav { gap: var(--space-4); }
  .main-nav > ul { display: none; }
  .main-nav > a.btn { display: none; }
  .nav-toggle-label { display: flex; }

  .mobile-menu {
    display: block;
    position: fixed;
    top: 76px;
    right: 0;
    left: 0;
    height: calc(100vh - 76px);
    background: var(--paper);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 90;
    overflow-y: auto;
  }
  .nav-toggle-input:checked ~ .mobile-menu {
    transform: translateX(0);
  }
  .mobile-menu .wrap {
    padding-top: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
  }
  .mobile-menu .wrap a {
    font-family: var(--font-display);
    font-size: 1.6rem;
    color: var(--navy-900);
  }
  .mobile-menu .wrap a.mobile-cta {
    display: inline-flex;
    margin-top: var(--space-4);
    align-self: flex-start;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--white);
  }

  .nav-toggle-input:checked ~ .nav-toggle-label span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .nav-toggle-input:checked ~ .nav-toggle-label span:nth-child(2) { opacity: 0; }
  .nav-toggle-input:checked ~ .nav-toggle-label span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--navy-900);
  color: var(--white);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(11,37,69,0.25); }

.btn-accent {
  background: var(--lime-300);
  color: var(--lime-700);
}
.btn-accent:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(163,230,53,0.35); }

.btn-ghost {
  background: transparent;
  border-color: var(--navy-900);
  color: var(--navy-900);
}
.btn-ghost:hover { background: var(--navy-900); color: var(--white); }

.btn-ghost-light {
  background: transparent;
  border-color: rgba(255,255,255,0.4);
  color: var(--white);
}
.btn-ghost-light:hover { background: rgba(255,255,255,0.12); }

/* ── Chevron arrow icon (brand signature, reused throughout) ── */
.chev {
  display: inline-block;
  width: 0.6em;
  height: 0.85em;
  position: relative;
}
.chev::after {
  content: '';
  position: absolute;
  inset: 0;
  border-right: 0.16em solid currentColor;
  border-top: 0.16em solid currentColor;
  transform: rotate(45deg);
  border-radius: 0 2px 0 0;
  width: 55%;
  height: 55%;
  top: 22%;
  left: 5%;
}

/* ── Sections ── */
section { padding: var(--space-9) 0; }
@media (max-width: 720px) { section { padding: var(--space-7) 0; } }

.section-navy {
  background: var(--navy-900);
  color: var(--white);
}
.section-navy h2, .section-navy h3 { color: var(--white); }
.section-navy p { color: rgba(255,255,255,0.72); }

/* ── Cards ── */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

/* ── Tagbar (brand element from logo) ── */
.tagbar {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--navy-900);
  padding: 7px 16px;
  border-radius: var(--radius-sm);
}
.tagbar span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--lime-300);
}
.tagbar .dot { opacity: 0.4; font-size: 5px; }

/* ── Footer ── */
.site-footer {
  background: var(--navy-900);
  color: rgba(255,255,255,0.6);
  padding: var(--space-7) 0 var(--space-5);
}
.site-footer a { color: rgba(255,255,255,0.85); }
.site-footer a:hover { color: var(--lime-300); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-grid h4 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-3);
}
.footer-grid ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); font-size: 0.92rem; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-5);
  font-size: 0.82rem;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-3); align-items: flex-start; }
}

/* ── Utility ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.center { text-align: center; }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-7 { margin-top: var(--space-7); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: 2px;
}