/* =========================================================
   FlameSync Harmonic Systems — UI Components
   Buttons, cards, navigation, callouts
   ========================================================= */

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);

  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.02em;

  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent-cyan);
  color: #0B0E14;
}

.btn-primary:hover {
  background-color: var(--color-accent-gold);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
}

.btn-muted {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-secondary);
}

.btn-muted:hover {
  color: var(--color-text-primary);
}

/* ---------- Navigation ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-header);

  background-color: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(10px);

  border-bottom: 1px solid var(--color-border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav__links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav__links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

/* ---------- Cards ---------- */

.card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);

  transition:
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
}

.card p {
  margin-bottom: 0;
}

/* ---------- Callouts ---------- */

.callout {
  border-left: 3px solid var(--color-accent-cyan);
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
}

/* ---------- Badges ---------- */

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);

  font-size: var(--font-size-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;

  background-color: var(--color-bg-secondary);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
}

.badge-accent {
  color: var(--color-accent-cyan);
  border-color: rgba(107, 228, 232, 0.35);
}

/* ---------- Section Headings ---------- */

.section-title {
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.section-subtitle {
  margin-bottom: var(--spacing-xl);
  color: var(--color-text-secondary);
  max-width: 720px;
}

/* ---------- Divider ---------- */

.divider {
  height: 1px;
  width: 100%;
  background-color: var(--color-border-subtle);
  margin: var(--spacing-xl) 0;
}

/* ---------- Footer ---------- */

.footer {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

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

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

/* =========================================================
   Hero Placeholder Visual
   ========================================================= */

.hero__visual {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: var(--z-background);
}

.hero__svg {
  width: 100%;
  height: 100%;
}

/* Field lines */
.field-lines path {
  fill: none;
  stroke: rgba(230, 233, 239, 0.08);
  stroke-width: 1;
  animation: drift 24s ease-in-out infinite alternate;
}

/* Constraint nodes */
.nodes circle {
  fill: rgba(107, 228, 232, 0.7);
  animation: pulse 6s ease-in-out infinite;
}

/* Motion */
@keyframes drift {
  from { transform: translateX(-10px); }
  to   { transform: translateX(10px); }
}

@keyframes pulse {
  0%   { opacity: 0.4; }
  50%  { opacity: 0.9; }
  100% { opacity: 0.4; }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .field-lines path,
  .nodes circle {
    animation: none;
  }
}

/* =========================================================
   Platform Intro — Background Visualization Fix
   ========================================================= */

.platform-intro--visual {
  position: relative;
  overflow: hidden;
}

/* SVG background layer */
.platform__visual {
  position: absolute;
  inset: 0;
  z-index: var(--z-background);
  pointer-events: none;
}

/* Ensure SVG fills section */
.platform__svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Raise text above SVG */
.platform-intro__content {
  position: relative;
  z-index: var(--z-content);
}

/* =========================================================
   End of components.css
   ========================================================= */