.class-list {
  max-width: 1000px;
  margin: 0 auto 48px;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ===== Class Card ===== */
.class-item {
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.class-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.06);
}

/* ===== Class Header ===== */
.class-header {
  width: 100%;
  border: none;
  background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
  padding: 10px 18px;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background 0.2s ease;
  outline-offset: -2px;
}

.class-header:hover {
  background: linear-gradient(135deg, #e8e8e8 0%, #d5d5d5 100%);
}

/*
.class-header:focus {
  outline: 2px solid #999999;
}*/

.class-header-main {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.class-title-text {
  font-size: 18px;
  font-weight: 600;
  color: #333;
  line-height: 1.3;
}

.class-location-text {
  font-size: 14px;
  color: #333;
  font-weight: 400;
}

.class-header-chevron {
  font-size: 20px;
  color: #333;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.class-item.active .class-header-chevron {
  transform: rotate(180deg);
}

/* ===== Sessions Area ===== */
.class-sessions {
  display: none;
  padding: 24px;
  background: #fafbfc;
}

.session-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0px;
}

/* ===== Session Item ===== */
.session-item {
  background: #ffffff;
  border-radius: 12px;
  border: 2px solid #e8edf2;
  padding: 1px 20px;
  transition: all 0.2s ease;
}

.session-item:hover {
  border-color: #c2d9f5;
  box-shadow: 0 2px 6px rgba(0, 79, 116, 0.08);
}

.session-item.selected {
  background: linear-gradient(135deg, #e9f5ff 0%, #f0f8ff 100%);
  border-color: #004f74;
  box-shadow: 0 2px 8px rgba(0, 79, 116, 0.12);
}

/* ===== Session Option Layout ===== */
.session-option {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.session-radio {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: #004f74;
}

.session-text {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.session-name {
  font-size: 15px;
  font-weight: 600;
  color: #1a1a1a;
  line-height: 1.4;
}

.session-datetime {
  font-size: 14px;
  color: #5a6c7d;
  line-height: 1.4;
}

/* ===== Next Button (Modern Professional Style) ===== */
.btn.btn-primary.session-register {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px !important;
  border-radius: 8px;
  background: #004f74;
  border: none;
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 2px 4px rgba(0, 79, 116, 0.2);
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn.btn-primary.session-register::after {
  content: '→';
  font-size: 16px;
  transition: transform 0.2s ease;
}

.btn.btn-primary.session-register:hover {
  background: #006494;
  box-shadow: 0 4px 8px rgba(0, 79, 116, 0.25);
  transform: translateY(-1px);
}

.btn.btn-primary.session-register:hover::after {
  transform: translateX(3px);
}

.btn.btn-primary.session-register:active {
  background: #003f5f;
  box-shadow: 0 1px 3px rgba(0, 79, 116, 0.2);
  transform: translateY(0);
}

/* ===== No Sessions Message ===== */
.no-sessions {
  text-align: center;
  padding: 32px 20px;
  color: #5a6c7d;
  font-size: 15px;
}

/* ===== Empty State ===== */
.class-list + p {
  text-align: center;
  padding: 48px 20px;
  color: #5a6c7d;
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}


  .session-checkbox-label {
    display: flex;
    align-items: center;
    padding: 10px;
    cursor: pointer;
    transition: background-color 0.2s;
  }

  .session-checkbox-label:hover {
    background-color: #f5f5f5;
  }

  .class-sessions .session-checkbox-label .session-checkbox {
    margin-right: 20px;
    margin-right:20px;
    margin-bottom:26px;
    width: 20px;
    height: 20px;
    cursor: pointer;
  }

  .session-checkbox:disabled {
    cursor: not-allowed;
    opacity: 0.6;
  }

  .session-item {
    border-bottom: 1px solid #e0e0e0;
  }

  .session-item:last-child {
    border-bottom: none;
  }

  .session-text {
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .session-name {
    font-weight: 500;
    margin-bottom: 4px;
  }

  .all-sessions-badge {
    color: #0066cc;
    font-weight: 600;
    font-size: 0.9em;
  }

  .session-datetime {
    color: #666;
    font-size: 0.9em;
  }

  .session-actions {
    padding: 15px;
    border-top: 2px solid #e0e0e0;
    text-align: center;
  }

  .session-register-btn {
    min-width: 150px;
    padding: 10px 30px;
  }

  .session-register-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .session-item.readonly {
    background-color: #f8f9fa;
  }

  .session-item.readonly .session-checkbox-label {
    cursor: default;
  }



/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  .class-list {
    gap: 16px;
  }

  .class-header {
    padding: 16px 20px;
  }

  .class-title-text {
    font-size: 16px;
  }

  .class-location-text {
    font-size: 13px;
  }

  .class-sessions {
    padding: 20px 16px;
  }

  .session-item {
    padding: 14px 16px;
  }

  .session-option {
    grid-template-columns: auto 1fr;
    gap: 12px;
  }

  .btn.btn-primary.session-register {
    grid-column: 2;
    justify-self: start;
    padding: 10px 20px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .class-header-main {
    gap: 4px;
  }

  .class-title-text {
    font-size: 15px;
  }

  .session-name {
    font-size: 14px;
  }

  .session-datetime {
    font-size: 13px;
  }
}