/* Design System: tokens, utilities, base components
   Scope: shared across brand pages. Brands override --primary/--secondary in page-level :root.
*/

/* 1) Tokens */
:root {
  /* Palette (brand-neutral defaults; pages override) */
  --primary: #0d6efd;
  --secondary: #ffffff;
  --text: #212529;
  --muted: #6c757d;
  --bg: #f8f9fa;

  /* Elevation */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 18px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 28px rgba(0,0,0,0.18);

  /* Motion */
  --ease-out: cubic-bezier(.22,.61,.36,1);
  --ease-in: cubic-bezier(.55,.085,.68,.53);
  --transition-fast: 120ms var(--ease-out);
  --transition-base: 200ms var(--ease-out);
  --transition-slow: 320ms var(--ease-out);

  /* Focus ring */
  --ring-color: rgba(76,154,255,.35);
  --ring-outline: #4c9aff;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
}

/* 2) Accessibility and base resets */
:focus-visible {
  outline: 2px solid var(--ring-outline);
  outline-offset: 2px;
}
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
input:focus-visible,
textarea:focus-visible {
  box-shadow: 0 0 0 3px var(--ring-color);
}

/* Reduce motion global switch and aria-live helpers */
@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto !important; }
}
[aria-live="polite"], [aria-live="assertive"] {
  /* prevent layout shift from status text changes */
  min-height: 1.25em;
}
[role="status"], [role="alert"] {
  /* ensure SR picks up updates consistently */
  aria-atomic: true;
}

.visually-hidden {
  position: absolute !important;
  clip: rect(1px,1px,1px,1px);
  padding: 0 !important;
  border: 0 !important;
  height: 1px !important;
  width: 1px !important;
  overflow: hidden;
  white-space: nowrap;
}

/* 3) Utilities */
.main-container {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* Reveal-on-scroll animation */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  will-change: opacity, transform;
}
.reveal.show {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.show,
  .card-elevated,
  .btn-base,
  .btn-primary-gradient {
    transition: none !important;
    animation: none !important;
  }
  /* Ensure reveal elements render immediately without motion */
  .reveal { opacity: 1 !important; transform: none !important; }
  .reveal.show { opacity: 1 !important; transform: none !important; }
  * { scroll-behavior: auto !important; }
}

/* Fine-tune reveal transition to be lightweight and smooth */
.reveal { will-change: opacity, transform; }
.reveal.show { transition: transform var(--transition-base), opacity var(--transition-base); }

/* 4) Components */
.card-elevated {
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card-elevated:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,0,0,0.12);
}

.card-header-soft {
  background: color-mix(in srgb, var(--primary) 12%, #ffffff);
  padding: 20px 24px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  border-bottom: 1px solid color-mix(in srgb, var(--primary) 20%, #ffffff);
}
.card-header-soft i {
  margin-right: 12px;
  font-size: 1.4rem;
  color: var(--primary);
}

.btn-base {
  padding: 14px 22px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-base), color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.btn-base:disabled {
  opacity: .6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}
.btn-primary-gradient {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: #212529;
  box-shadow: var(--shadow-sm);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
}
.btn-primary-gradient:hover {
  background: linear-gradient(to right, var(--secondary), var(--primary));
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-dark-gradient {
  background: linear-gradient(to right, #333, #666);
  color: #fff;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(51,51,51,.3);
}
.btn-dark-gradient:hover {
  background: linear-gradient(to right, #666, #333);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Status panel */
.status-panel {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border: 1px solid #dee2e6;
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}
.status-panel h3 {
  color: #495057;
  margin-bottom: 15px;
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
  margin-bottom: 15px;
}
.status-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: white;
  border-radius: 8px;
  border: 1px solid #e9ecef;
  min-height: 40px;
}
.status-label {
  font-weight: 500;
  color: var(--muted);
  min-width: 100px;
  flex-shrink: 0;
  margin-right: 12px;
}
.status-value {
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: #495057;
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  text-align: right;
  position: relative;
}
.status-value.connected { color: #28a745; font-weight: 500; }
.status-value.disconnected { color: #dc3545; font-weight: 500; }

/* Tooltip (generic) */
.tooltip {
  position: absolute;
  background: rgba(0,0,0,0.9);
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-family: 'Courier New', monospace;
  white-space: pre-wrap;
  word-break: break-all;
  max-width: 400px;
  z-index: 1000;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.tooltip.show { opacity: 1; }

/* Promo banner */
.promo-banner {
  border-radius: var(--radius-md);
  margin: 20px 0;
  padding: 16px 20px;
  box-shadow: 0 4px 15px color-mix(in srgb, var(--primary) 30%, transparent);
  animation: subtle-pulse 3s ease-in-out infinite;
}
@keyframes subtle-pulse {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* Reveal helpers for QR preview hovers may reuse .tooltip from above */

/* 5) Responsive tweaks */
@media (max-width: 768px) {
  .main-container { padding-left: 12px; padding-right: 12px; }
  .status-grid { grid-template-columns: 1fr; }
  .status-value { max-width: 150px; }
}

/* Keyboard focus visibility for custom buttons built on <a> */
a.btn-base, a.btn-primary-gradient {
  text-decoration: none;
}
a.btn-base:focus-visible, a.btn-primary-gradient:focus-visible {
  box-shadow: 0 0 0 3px var(--ring-color);
  outline: 2px solid var(--ring-outline);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .status-value { max-width: 120px; }
}