*{box-sizing:border-box}
body{margin:0;font-family:"Source Sans 3","Noto Sans SC",sans-serif;color:#f8f9ff;background:#0f1728}
.layout{display:grid;grid-template-columns:1fr 420px;min-height:100vh}
.graphic{
  position:sticky;top:0;height:100vh;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle at 20% 20%,#25406d 0,#101a30 50%,#070b15 100%);
}
.bg-label{font-size:48px;font-weight:700;letter-spacing:2px;opacity:.85;transition:all .35s}
.story{padding:40px 26px}
.step{
  min-height:72vh;padding:20px;border:1px solid #2d3d5e;border-radius:14px;background:#111b2e;margin-bottom:20px;
}
.step h2{margin-top:0}
.step.active{border-color:#70a8ff;box-shadow:0 0 0 1px #70a8ff}
.progress-bar-container{position:fixed;top:0;left:0;width:100%;height:4px;background:rgba(255,255,255,0.1);z-index:100}
.progress-bar{height:100%;width:0%;background:#70a8ff;transition:width 0.1s}
@media(max-width:980px){
  .layout{grid-template-columns:1fr}
  .graphic{position:relative;height:36vh}
}

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


/* === CSS Professor Animation Upgrade (Round 22) === */

/* Page entrance */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.app, main, body > .container { animation: fadeInUp 0.4s ease-out; }

/* Staggered card entrance */
@keyframes cardReveal {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.card, [class*="card"], .mission-card, .module-card, .stat-card {
  animation: cardReveal 0.35s ease-out both;
}
.card:nth-child(2), [class*="card"]:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3), [class*="card"]:nth-child(3) { animation-delay: 0.1s; }
.card:nth-child(4), [class*="card"]:nth-child(4) { animation-delay: 0.15s; }
.card:nth-child(5), [class*="card"]:nth-child(5) { animation-delay: 0.2s; }

/* Subtle pulse for primary buttons */
@keyframes btnPulse {
  0%, 100% { box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
  50% { box-shadow: 0 2px 12px rgba(199,73,31,0.25); }
}
button[id*="Btn"]:not(:disabled), .btn-primary {
  animation: btnPulse 3s ease-in-out infinite;
}
button:disabled { animation: none; opacity: 0.6; }

/* Smooth height transitions for collapsible sections */
details { transition: all 0.2s ease; }
details[open] summary { margin-bottom: 8px; }

/* Tooltip fade */
[title] { position: relative; }

/* Progress bar animation */
@keyframes progressFill {
  from { width: 0; }
}
.mc-bar-fill, .mod-progress-fill, .bar-fill, progress::-webkit-progress-value {
  animation: progressFill 0.6s ease-out;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* === Loading & Feedback States === */
@keyframes spin { to { transform: rotate(360deg); } }
.btn-loading { position: relative; pointer-events: none; opacity: 0.7; }
.btn-loading::after {
  content: '';
  position: absolute;
  right: 8px; top: 50%;
  width: 14px; height: 14px;
  margin-top: -7px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
.toast-msg {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: #333; color: #fff; padding: 10px 20px; border-radius: 8px;
  font-size: 0.9rem; z-index: 9999; opacity: 0;
  transition: opacity 0.3s ease;
}
.toast-msg.show { opacity: 1; }


/* === Onboarding Pulse Dot === */
@keyframes onboardPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}
.onboard-dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--accent, #c7491f);
  border-radius: 50%;
  animation: onboardPulse 1.5s ease-in-out infinite;
  margin-right: 4px;
  vertical-align: middle;
}