body {
  background-color: #0b0b0b;
  color: #f0f0f0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar {
  background: #000;
  border-bottom: 1px solid #1f1f1f;
}

.navbar-brand {
  color: #ff8c00 !important;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.container {
  color: inherit;
}

.modal-content {
  background: #111;
  color: #f0f0f0;
  border: 1px solid #1f1f1f;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.modal-header {
  border-bottom: 1px solid #1f1f1f;
}

.modal-footer {
  border-top: 1px solid #1f1f1f;
}

.btn-close {
  filter: invert(1) grayscale(1);
  opacity: 0.8;
}

.btn-close:hover {
  opacity: 1;
}

.form-label {
  color: #e6e6e6;
  font-weight: 600;
}

.form-control,
.form-select {
  background: #0b0b0b;
  color: #f0f0f0;
  border: 1px solid #2a2a2a;
}

.form-control:focus,
.form-select:focus {
  background: #0b0b0b;
  color: #fff;
  border-color: #ff8c00;
  box-shadow: 0 0 0 0.2rem rgba(255, 140, 0, 0.2);
}

.form-control::placeholder {
  color: #9a9a9a;
}

.seminar-card {
  background: #111;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 20px;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.seminar-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
}

.seminar-card .card-header {
  background: linear-gradient(135deg, #ff8c00 0%, #ff4500 100%);
  color: white;
  border-radius: 8px 8px 0 0;
  padding: 15px;
}

.seminar-card .card-title {
  color: white;
  font-weight: 600;
  margin-bottom: 0;
  font-size: 18px;
}

.seminar-card .card-body {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.seminar-card .seminar-details {
  font-size: 14px;
  color: #cfcfcf;
  margin: 8px 0;
  flex-grow: 1;
}

.seminar-card .seminar-details strong {
  color: #f5f5f5;
}

.price-tag {
  font-size: 28px;
  font-weight: bold;
  color: #ff8c00;
  margin: 15px 0;
}

.btn-primary {
  background: linear-gradient(135deg, #ff8c00 0%, #ff4500 100%);
  border: none;
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  color: white;
  box-shadow: 0 6px 16px rgba(255, 140, 0, 0.25);
}

.btn-primary:focus {
  box-shadow: 0 0 0 0.2rem rgba(255, 140, 0, 0.35);
}

.btn-book {
  background: linear-gradient(135deg, #ff8c00 0%, #ff4500 100%);
  border: none;
  color: white;
  padding: 12px 20px;
  border-radius: 5px;
  cursor: pointer;
  transition: transform 0.2s;
  margin-top: auto;
}

.btn-book:hover {
  transform: scale(1.05);
  color: white;
  text-decoration: none;
}

.alert {
  border: 1px solid #2a2a2a;
}

.alert-success {
  background-color: rgba(40, 167, 69, 0.15);
  border-color: rgba(40, 167, 69, 0.4);
  color: #b7f7c6;
}

.alert-error {
  background-color: rgba(220, 53, 69, 0.15);
  border-color: rgba(220, 53, 69, 0.4);
  color: #ffb3bb;
}

.alert-info {
  background-color: rgba(255, 140, 0, 0.12);
  border-color: rgba(255, 140, 0, 0.35);
  color: #ffd9a0;
}

.spinner-border {
  color: #ff8c00;
}

#payment-status {
  text-align: center;
}