/* NAV / HEADER */
header, #main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, border-color 0.3s ease;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo .bracket {
  color: var(--text-dimmer);
}

.logo .name {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 34px;
  font-size: 14px;
  color: var(--text-dim);
}

.nav-links a {
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--blue);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-cart-link {
  position: relative;
  color: var(--text-dim);
  transition: color 0.2s;
}

.nav-cart-link:hover {
  color: var(--text);
}

.cart-badge {
  position: absolute;
  top: -8px;
  right: -10px;
  background: var(--blue);
  color: #000;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--blue);
  color: var(--blue);
  transition: all 0.2s;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--blue);
  color: #000;
  box-shadow: 0 0 24px var(--blue-glow);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* GRIDS */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* FOOTER */
footer {
  border-top: 1px solid var(--line);
  padding: 50px 0 30px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-desc {
  color: var(--text-dimmer);
  font-size: 13.5px;
  margin-top: 14px;
  max-width: 260px;
}

.footer-cols {
  display: flex;
  gap: 60px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-dimmer);
  margin-bottom: 10px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12.5px;
  color: var(--text-dimmer);
  font-family: var(--font-mono);
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

/* SECTIONS */
section {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 20px 28px;
    gap: 4px;
    transform: translateY(-110%);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 49;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav-links a {
    padding: 12px 8px;
    min-height: 44px;
    display: flex;
    align-items: center;
    font-size: 15px;
    border-bottom: 1px solid var(--line);
  }
  .nav-links a:last-child { border-bottom: none; }
  .menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
  }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
  .footer-top { flex-direction: column; }
  .footer-cols { gap: 30px; }
  .nav-cta { padding: 10px 14px; font-size: 12px; }
}

/* SMALL PHONES (Android 360-480px) */
@media (max-width: 480px) {
  .wrap { padding: 0 16px; }
  h1 { font-size: clamp(24px, 7vw, 32px); }
  h2 { font-size: clamp(20px, 5vw, 26px); }
  h3 { font-size: 17px; }
  section { padding: 40px 0; }

  /* Touch-friendly tap targets */
  .btn { padding: 14px 22px; min-height: 44px; font-size: 14px; }
  .btn-sm { padding: 12px 16px; min-height: 44px; font-size: 13px; }
  .filter-btn { padding: 10px 16px; min-height: 44px; font-size: 12px; }

  /* Input zoom fix — 16px minimum */
  .form-input, .form-textarea, .form-select { font-size: 16px; padding: 14px 16px; }

  /* Cards breathing room */
  .card { padding: 20px; }
  .section-head { margin-bottom: 32px; }

  /* Nav adjustments */
  .logo { font-size: 15px; }
  nav { padding: 14px 0; }
  .nav-right { gap: 10px; }
  .nav-cta { padding: 8px 12px; font-size: 11px; }
  .theme-toggle { width: 34px; height: 34px; }

  /* Footer mobile */
  .footer-cols { flex-direction: column; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 6px; }

  /* Stats grid 2 col on small */
  .stats { grid-template-columns: repeat(2, 1fr) !important; }

  /* Toast mobile */
  .toast-container { left: 16px; right: 16px; bottom: 16px; }
  .toast { min-width: auto; font-size: 13px; padding: 12px 16px; }
}

/* EXTRA SMALL (320px) */
@media (max-width: 360px) {
  .wrap { padding: 0 12px; }
  h1 { font-size: 22px; }
  .btn { padding: 12px 18px; font-size: 13px; }
  .nav-cta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
}