* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100vh;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* --- Registration Page --- */
.hero {
  text-align: center;
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 0.5rem;
}

.hero p {
  color: #94a3b8;
  font-size: 1.05rem;
  line-height: 1.6;
}

.card {
  background: #1e293b;
  border-radius: 12px;
  padding: 2rem;
  border: 1px solid #334155;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: #cbd5e1;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid #475569;
  border-radius: 8px;
  background: #0f172a;
  color: #f1f5f9;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  width: 100%;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: #3b82f6;
  color: #fff;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-primary:disabled {
  background: #475569;
  cursor: not-allowed;
}

/* --- Video Page --- */
.video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.video-wrapper iframe,
.video-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-status {
  text-align: center;
  padding: 0.6rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.status-watching {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.status-complete {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

/* --- Feedback Form --- */
.feedback-section {
  display: none;
  animation: fadeIn 0.5s ease;
}

.feedback-section.visible {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.question-card {
  background: #1e293b;
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  border: 1px solid #334155;
}

.question-card label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: #e2e8f0;
}

/* Star Rating */
.star-rating {
  display: flex;
  gap: 0.4rem;
}

.star-rating button {
  background: none;
  border: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: #475569;
  transition: color 0.15s, transform 0.1s;
  padding: 0;
}

.star-rating button:hover,
.star-rating button.active {
  color: #facc15;
}

.star-rating button:hover {
  transform: scale(1.15);
}

/* --- Thank You --- */
.thank-you {
  display: none;
  text-align: center;
  padding: 3rem 1rem;
}

.thank-you.visible {
  display: block;
}

.thank-you h2 {
  font-size: 1.5rem;
  color: #4ade80;
  margin-bottom: 0.5rem;
}

.thank-you p {
  color: #94a3b8;
}

/* --- Admin Page --- */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid #334155;
}

.admin-table th {
  background: #1e293b;
  color: #94a3b8;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.admin-table td {
  color: #cbd5e1;
}

.admin-table tr:hover td {
  background: rgba(59, 130, 246, 0.05);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 1rem;
  color: #f8fafc;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-green {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
}

.badge-yellow {
  background: rgba(234, 179, 8, 0.15);
  color: #facc15;
}

.badge-gray {
  background: rgba(148, 163, 184, 0.15);
  color: #94a3b8;
}

.error-msg {
  color: #f87171;
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 1.5rem 1rem;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
  .card {
    padding: 1.25rem;
  }
}