/* Shawn Brothers — Network Architecture & Engineering
   Custom styles layered on Tailwind CDN. Edit brand colors here. */

:root {
  --sb-navy: #0a1628;
  --sb-slate: #0f1c2e;
  --sb-panel: #132337;
  --sb-border: rgba(56, 189, 248, 0.18);
  --sb-accent: #22d3ee;
  --sb-accent-hot: #38bdf8;
  --sb-teal: #2dd4bf;
  --sb-text: #e2e8f0;
  --sb-muted: #94a3b8;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--sb-navy);
  color: var(--sb-text);
}

/* Subtle network-grid atmosphere */
.sb-grid-bg {
  background-color: var(--sb-navy);
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.04) 1px, transparent 1px),
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.18), transparent);
  background-size: 48px 48px, 48px 48px, 100% 100%;
}

.sb-hero-glow {
  background:
    radial-gradient(ellipse 60% 40% at 70% 30%, rgba(45, 212, 191, 0.12), transparent),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(56, 189, 248, 0.1), transparent);
}

.sb-card {
  background: linear-gradient(160deg, rgba(19, 35, 55, 0.95), rgba(15, 28, 46, 0.98));
  border: 1px solid var(--sb-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.sb-card:hover {
  border-color: rgba(34, 211, 238, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(34, 211, 238, 0.08);
}

.sb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 0.375rem;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.sb-btn-primary {
  background: linear-gradient(135deg, #0891b2, #22d3ee);
  color: #0a1628;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
}

.sb-btn-primary:hover {
  background: linear-gradient(135deg, #06b6d4, #67e8f9);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.4);
  transform: translateY(-1px);
}

.sb-btn-ghost {
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: var(--sb-accent-hot);
  background: transparent;
}

.sb-btn-ghost:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: var(--sb-accent);
}

.sb-link {
  color: var(--sb-accent-hot);
  transition: color 0.2s ease;
}

.sb-link:hover {
  color: var(--sb-accent);
}

.sb-nav-link {
  color: var(--sb-muted);
  transition: color 0.2s ease;
}

.sb-nav-link:hover,
.sb-nav-link.active {
  color: var(--sb-accent);
}

.sb-input {
  width: 100%;
  background: rgba(10, 22, 40, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.25);
  color: var(--sb-text);
  border-radius: 0.375rem;
  padding: 0.75rem 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.sb-input:focus {
  outline: none;
  border-color: var(--sb-accent);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

.sb-input::placeholder {
  color: #64748b;
}

/* Honeypot — hidden from humans */
.sb-hp {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

/* Mobile nav panel */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

#mobile-menu.open {
  max-height: 320px;
}

.sb-fade-up {
  animation: sbFadeUp 0.6s ease both;
}

@keyframes sbFadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sb-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 0.5rem;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  color: var(--sb-accent);
}

.sb-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sb-teal);
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.3);
  border-radius: 9999px;
}

.sb-alert {
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  border: 1px solid;
}

.sb-alert-success {
  background: rgba(45, 212, 191, 0.1);
  border-color: rgba(45, 212, 191, 0.4);
  color: #99f6e4;
}

.sb-alert-error {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.4);
  color: #fecaca;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .sb-fade-up,
  .sb-card,
  .sb-btn,
  #mobile-menu {
    animation: none;
    transition: none;
  }
}