/* components.css — buttons, cards, badges, nav (premium pass: glow shadows,
   smooth transitions, richer hover states) */

/* --- Buttons --- */
.rh-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--rh-space-2);
  padding: 10px 20px;
  border-radius: var(--rh-radius-md);
  font-size: var(--rh-fs-sm);
  font-weight: 700;
  border: none;
  transition: transform var(--rh-transition), box-shadow var(--rh-transition), opacity var(--rh-transition);
  font-family: var(--rh-font-body);
}
.rh-btn:hover { text-decoration: none; transform: translateY(-2px); }

.rh-btn--primary {
  background: var(--rh-amber-500);
  color: var(--rh-amber-text);
}
.rh-btn--primary:hover { background: var(--rh-amber-400); box-shadow: var(--rh-shadow-amber-glow); }

.rh-btn--secondary {
  background: transparent;
  color: var(--rh-text-primary);
  border: 1.5px solid var(--rh-border-strong);
}
.rh-btn--secondary:hover { border-color: var(--rh-navy-700); color: var(--rh-navy-800); }

.rh-btn--ghost-navy {
  background: transparent;
  color: var(--rh-navy-800);
}

/* --- Top nav --- */
.rh-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: transparent;
  padding: 14px 0;
  transition: background var(--rh-transition), box-shadow var(--rh-transition), border-color var(--rh-transition);
  border-bottom: 1px solid transparent;
}
.rh-header.is-scrolled {
  background: rgba(8,20,34,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--rh-border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}
.rh-header .rh-container {
  display: flex;
  align-items: center;
  gap: var(--rh-space-5);
}
.rh-brand-row {
  display: flex;
  align-items: center;
  gap: 11px;
}
.rh-brand {
  display: flex;
  align-items: center;
}
.rh-brand-text {
  font-family: var(--rh-font-display);
  font-size: var(--rh-fs-xl);
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.rh-brand-railway { color: var(--rh-text-primary); }
.rh-brand-help { color: var(--rh-amber-500); }
.rh-brand-icon {
  width: 46px;
  height: 46px;
  object-fit: cover;
  border-radius: 10px;
}
.rh-tagline {
  font-size: 11px;
  color: rgba(245,181,89,0.68);
}
.rh-nav {
  display: flex;
  gap: var(--rh-space-4);
  margin-left: auto;
  align-items: center;
}
.rh-nav a {
  color: var(--rh-text-secondary);
  font-size: var(--rh-fs-sm);
  font-weight: 600;
  transition: color var(--rh-transition);
}
.rh-nav a:hover { color: var(--rh-amber-400); text-decoration: none; }
.rh-nav-link {
  color: var(--rh-text-secondary);
  font-size: var(--rh-fs-sm);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--rh-transition);
}
.rh-nav-link:hover { color: var(--rh-amber-400); text-decoration: none; }
.rh-nav--secondary a {
  opacity: 0.75;
  font-size: var(--rh-fs-xs);
}

.rh-lang-toggle {
  background: var(--rh-surface-1);
  border: 1px solid var(--rh-border-strong);
  color: var(--rh-text-primary);
  border-radius: var(--rh-radius-sm);
  padding: 6px 12px;
  font-size: var(--rh-fs-xs);
  font-weight: 600;
  transition: background var(--rh-transition);
}
.rh-lang-toggle:hover { background: var(--rh-navy-100); }

/* --- Cards --- */
.rh-card {
  position: relative;
  overflow: hidden;
  background: var(--rh-surface-0);
  border: 1px solid var(--rh-border);
  border-radius: var(--rh-radius-lg);
  box-shadow: var(--rh-shadow-card);
  padding: var(--rh-space-5);
  transition: box-shadow var(--rh-transition), border-color var(--rh-transition), transform var(--rh-transition);
}
/* Hidden top accent bar — reveals on hover, diplomate's signature card detail,
   translated from mint to amber for RailStudy's palette. */
.rh-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--rh-amber-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--rh-transition);
}
.rh-card:hover {
  box-shadow: var(--rh-shadow-card-hover-amber);
  border-color: rgba(239,159,39,0.28);
  transform: translateY(-4px);
}
.rh-card:hover::before { transform: scaleX(1); }
/* Disabled/coming-soon cards should never lift or glow — same exception
   diplomate makes for its own coming-soon branch cards. */
.rh-card.is-disabled:hover,
.rh-card[aria-disabled="true"]:hover {
  transform: none;
  box-shadow: var(--rh-shadow-card);
  border-color: var(--rh-border);
}
.rh-card.is-disabled:hover::before,
.rh-card[aria-disabled="true"]:hover::before { transform: scaleX(0); }

/* --- Source-reliability badges (core product principle — always visible) --- */
.rh-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--rh-fs-xs);
  font-weight: 700;
  padding: 3px 11px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.rh-badge--official {
  background: rgba(31, 138, 85, 0.12);
  color: var(--rh-source-official);
}
.rh-badge--semi-official {
  background: rgba(201, 138, 18, 0.12);
  color: var(--rh-source-semi-official);
}
.rh-badge--practice {
  background: rgba(55, 138, 221, 0.16);
  color: #85B7EB;
  border: 1px solid rgba(55, 138, 221, 0.4);
}
.rh-badge--unofficial {
  background: rgba(138, 143, 152, 0.14);
  color: var(--rh-source-unofficial);
}

/* --- Category chips (Updates module) --- */
.rh-chip {
  display: inline-block;
  font-size: var(--rh-fs-xs);
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--rh-surface-2);
  color: var(--rh-text-secondary);
}

/* --- Question card (Practice/PYQ) --- */
.rh-question-card {
  margin-bottom: var(--rh-space-4);
}
.rh-question-meta {
  display: flex;
  gap: var(--rh-space-2);
  margin-bottom: var(--rh-space-3);
  align-items: center;
}
.rh-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border: 1.5px solid var(--rh-border);
  border-radius: var(--rh-radius-md);
  background: var(--rh-surface-0);
  margin-bottom: var(--rh-space-2);
  font-size: var(--rh-fs-sm);
  transition: border-color var(--rh-transition), background var(--rh-transition), transform var(--rh-transition);
}
.rh-option:hover { border-color: var(--rh-navy-700); transform: translateX(2px); }
.rh-option--correct { border-color: var(--rh-success); background: rgba(31,138,85,0.06); }
.rh-option--incorrect { border-color: var(--rh-signal-red); background: rgba(226,75,74,0.06); }

/* ── Public-page footer (marketing pages: index, group-b, departmental-je) ── */
.rh-site-footer {
  background: var(--rh-navy-950);
  padding: 28px 20px;
  margin-top: 40px;
}
.rh-site-footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
.rh-site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: center;
}
.rh-site-footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  text-decoration: none;
}
.rh-site-footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}
.rh-site-footer-copy {
  color: rgba(255,255,255,0.4);
  font-size: 12px;
  margin: 0;
}