/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(5, 9, 18, 0.7);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.nav.is-scrolled {
  background: rgba(5, 9, 18, 0.92);
  border-bottom-color: var(--border-strong);
}

.nav__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.0625rem;
  color: var(--text-primary);
}

.nav__brand img {
  height: 36px;
  width: auto;
}

.nav__brand-mark {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: var(--space-2) 0;
  transition: color 0.2s var(--ease-out);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--text-primary);
}

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all 0.2s var(--ease-out);
}

.lang-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.lang-toggle__opt {
  padding: 2px 6px;
  border-radius: 3px;
  transition: all 0.2s var(--ease-out);
}

.lang-toggle__opt.is-active {
  background: var(--accent);
  color: #fff;
}

.nav__menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.nav__menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
}
.nav__menu-btn span::before,
.nav__menu-btn span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
}
.nav__menu-btn span::before { top: -6px; }
.nav__menu-btn span::after { top: 6px; }

@media (max-width: 880px) {
  .nav__menu-btn { display: inline-flex; }
  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    z-index: 90;                 /* above page content (main z-index: 1), under nav (100) */
    flex-direction: column;
    align-items: stretch;        /* override desktop `center` so items fill width */
    gap: 0;
    padding: var(--space-3) var(--space-5) var(--space-5);
    /* Fully opaque on mobile — backdrop-filter blurs but doesn't darken,
       so any transparency lets page content bleed through visibly. */
    background: var(--bg-deep);
    border-bottom: 1px solid var(--border-strong);
    /* Closed: move element fully above viewport.
       `-110%` was insufficient — top starts at var(--nav-h), so we must
       translate by element's full height PLUS the nav offset, plus a buffer. */
    transform: translateY(calc(-100% - var(--nav-h) - 4px));
    transition: transform 0.3s var(--ease-out);
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links > li { width: 100%; }
  .nav__link {
    display: block;              /* anchor is `inline` by default — must block for full-width */
    width: 100%;
    padding: var(--space-4) 0;
    font-size: 1.0625rem;
    border-bottom: 1px solid var(--border);
  }
  .nav__link.is-active::after { display: none; }   /* underline reads weird in vertical layout */
  .nav__link.is-active {
    color: var(--accent);
    padding-left: var(--space-3);
    border-left: 2px solid var(--accent);
  }
  .nav__actions .btn { display: none; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  border-radius: 999px;
  transition: all 0.25s var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn--primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 94, 20, 0.28);
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(255, 94, 20, 0.4);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn--ghost:hover {
  border-color: var(--glow);
  color: var(--glow);
  box-shadow: 0 0 20px var(--glow-faint);
}

.btn--glow {
  background: rgba(0, 212, 255, 0.08);
  color: var(--glow);
  border-color: var(--glow-soft);
}
.btn--glow:hover {
  background: rgba(0, 212, 255, 0.14);
  box-shadow: 0 0 24px var(--glow-faint);
}

.btn--lg { padding: 16px 28px; font-size: 1rem; }
.btn--sm { padding: 8px 16px; font-size: 0.8125rem; }

.btn .arrow {
  display: inline-block;
  transition: transform 0.25s var(--ease-out);
}
.btn:hover .arrow {
  transform: translateX(3px);
}

/* ===== Card ===== */
.card {
  position: relative;
  padding: var(--space-6);
  background: var(--surface-glass);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.35s var(--ease-out);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 30%, var(--glow-faint) 100%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--glow-soft);
}

.card:hover::before {
  opacity: 1;
}

.card__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  margin: 0 0 var(--space-3);
  color: var(--text-primary);
}

.card__body {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1px solid var(--accent-soft);
  color: var(--accent);
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.125rem;
}

.card__footer {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.card details {
  margin-top: var(--space-4);
}

.card details summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--glow);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: color 0.2s var(--ease-out);
}

.card details summary::-webkit-details-marker { display: none; }

.card details summary::after {
  content: "+";
  font-size: 1.125rem;
  transition: transform 0.25s var(--ease-out);
}

.card details[open] summary::after {
  content: "−";
}

.card details[open] summary {
  margin-bottom: var(--space-4);
}

.card details ul {
  margin: 0;
  padding: 0 0 0 var(--space-5);
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.card details ul li {
  margin-bottom: var(--space-2);
}

.card details ul li::marker {
  color: var(--accent);
}

/* ===== Stat counters ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  padding: var(--space-7) 0;
}

@media (max-width: 760px) {
  .stats { grid-template-columns: 1fr; gap: var(--space-4); }
}

.stat {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
}

.stat--hero {
  border-color: var(--accent-soft);
  background: linear-gradient(180deg, rgba(255, 94, 20, 0.08), var(--surface-glass));
  box-shadow: 0 0 0 1px var(--accent-soft), 0 0 48px rgba(255, 94, 20, 0.12);
}

.stat__num {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 5vw + 1rem, 4.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  display: block;
  margin-bottom: var(--space-2);
}

.stat--hero .stat__num {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(3.5rem, 7vw + 1rem, 6rem);
}

.stat__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  display: block;
}

.stat__caption {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: block;
}

/* ===== CTA band ===== */
.cta-band {
  position: relative;
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--gradient-band);
  background-size: 200% 100%;
  animation: gradient-shift 8s ease-in-out infinite;
  text-align: center;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.18), transparent 40%),
    radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1), transparent 40%);
  pointer-events: none;
}

.cta-band > * { position: relative; }

.cta-band h2 {
  color: #fff;
  margin-bottom: var(--space-4);
}

.cta-band p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 56ch;
  margin: 0 auto var(--space-6);
}

.cta-band .btn--primary {
  background: #fff;
  color: var(--accent);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.cta-band .btn--primary:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-7) 0 var(--space-6);
  background: rgba(5, 9, 18, 0.6);
  margin-top: var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

@media (max-width: 760px) {
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-5); }
}

.footer__brand img {
  height: 40px;
  margin-bottom: var(--space-4);
}

.footer__brand p {
  font-size: 0.875rem;
  max-width: 36ch;
}

.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: var(--space-4);
}

.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__col li {
  margin-bottom: var(--space-2);
}

.footer__col a {
  font-size: 0.9375rem;
  color: var(--text-muted);
  transition: color 0.2s var(--ease-out);
}

.footer__col a:hover {
  color: var(--text-primary);
}

.footer__bottom {
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-faint);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer__tagline {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}