/* Shared by every page: colour tokens, base, form controls, loading overlay. */
:root {
  --bg: #0f172a;
  --bg-glass: rgba(15, 23, 42, 0.8);
  --bg-panel: rgba(15, 23, 42, 0.95);
  --text: #f8fafc;
  --text-soft: #e2e8f0;
  --text-bright: #f1f5f9;
  --muted: #94a3b8;
  --orange: #f97316;
  --cyan: #06b6d4;
  --green: #10b981;
  --gradient-brand: linear-gradient(90deg, #f97316, #dc2626);
  --gradient-blue: linear-gradient(90deg, #167cf9, #2641dc);
  /* r, g, b of the tint behind fields, borders and hovers */
  --ink: 255, 255, 255;
  --border: rgba(100, 116, 139, 0.3);
  --surface: rgba(255, 255, 255, 0.03);
  --surface-border: rgba(var(--ink), 0.08);
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* Read by screen readers, not shown */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

canvas#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: var(--bg-canvas, #101020);
}

/* The logo symbol was drawn at 23px and scaled 1.5x */
.brand-logo {
  display: block;
  width: auto;
  height: 34.5px;
}

footer {
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}

.github-link {
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  text-decoration: none;
  padding: 0.5rem !important;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.github-link:hover {
  background: rgba(var(--ink), 0.1) !important;
  transform: translateY(-1px);
}

.github-link svg {
  transition: transform 0.2s ease;
}

.github-link:hover svg {
  transform: scale(1.1);
}

/* Loading overlay and button spinner */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.show {
  opacity: 1;
  visibility: visible;
}

.loading-container {
  background: var(--surface);
  border-radius: 12px;
  padding: 2rem;
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid var(--surface-border);
  box-shadow: 0 15px 35px var(--shadow, rgba(0, 0, 0, 0.3));
  text-align: center;
  min-width: 300px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto 1rem;
  border: 3px solid rgba(var(--ink), 0.1);
  border-top: 3px solid var(--cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  color: var(--text-soft);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 1rem;
}

.loading-progress {
  width: 100%;
  height: 4px;
  background: rgba(var(--ink), 0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.loading-progress-bar {
  height: 100%;
  background: var(--gradient-brand);
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
  animation: pulse 2s ease-in-out infinite;
}

.loading-subtext {
  color: var(--muted);
  font-size: 14px;
  margin-top: 0.5rem;
}

.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid #ffffff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@media (max-width: 480px) {
  .loading-container {
    margin: 0 20px;
    min-width: auto;
    padding: 1.5rem;
  }

  .loading-text {
    font-size: 14px;
  }
}