/* Reset and Base Styles */
:root {
  --primary-color: #3182ce;
  --primary-hover: #2b6cb0;
  --danger-color: #e53e3e;
  --danger-hover: #c53030;
  --secondary-bg: #edf2f7;
  --secondary-hover: #e2e8f0;
  --border-color: #e4e7eb;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --bg-light: #f7f9fc;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 14px;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  padding: 12px;
}

/* Layout */
.index {
  width: 1200px;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

header {
  background: #fff;
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

main {
  display: flex;
  gap: 12px;
}

.sidebar {
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

footer {
  background: #fff;
  border-radius: 10px;
  padding: 12px;
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

/* Panels */
.panel {
  background: #fff;
  border-radius: 10px;
  padding: 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

/* Typography */
h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
  display: block;
}

/* Form Elements */
input[type="text"],
input[type="password"],
input[type="number"],
select {
  width: 100%;
  padding: 8px;
  border:none;
  border-bottom: 1px solid var(--border-color);
  border-radius: 0;
  font-size: 13px;
  color: var(--text-primary);
  background: #fff;
transition: border-bottom 0.3s ease;
}

input:focus,
select:focus {
  outline: none;
  border-bottom:1px solid var(--primary-color);

}

input[type="checkbox"] {
  margin-right: 6px;
  accent-color: var(--primary-color);
}

.checkbox-label {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  margin-bottom: 8px;
}

/* Buttons */
button {
  padding: 8px 14px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

button:not(.secondary):not(.danger) {
  background: var(--primary-color);
  color: #fff;
}

button:not(.secondary):not(.danger):hover {
  background: var(--primary-hover);
}

button.secondary {
  background: var(--secondary-bg);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

button.secondary:hover {
  background: var(--secondary-hover);
}

button.danger {
  background: var(--danger-color);
  color: #fff;
}

button.danger:hover {
  background: var(--danger-hover);
}

button:disabled {
  background: var(--secondary-hover);
  color: #a0aec0;
  cursor: not-allowed;
}

.button-group {
  display: flex;
  gap: 8px;
  margin: 8px 0;
}

/* Email List */
.email-list-container {
  flex: 1;
}

#emailList ul {
  list-style: none;
}

#emailList li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background 0.2s;
}

#emailList li:hover {
  background: #f1f5f9;
}

#emailList li.selected {
  background: #e6f0fa;
}

#emailList .email-info {
  flex: 1;
}

#emailList .subject,
#emailList .from,
#emailList .date {
  font-size: 13px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#emailList .from,
#emailList .date {
  font-size: 12px;
  color: var(--text-secondary);
}

#emailList .delete-item-icon {
  color: var(--danger-color);
  font-size: 16px;
  padding: 4px;
  border-radius: 4px;
  cursor: pointer;
}

#emailList .delete-item-icon:hover {
  background: #fef6f5;
}

/* Status Messages */
.status-message {
  padding: 8px;
  border-radius: 6px;
  font-size: 13px;
  margin-top: 8px;
}

.error {
  background: #fff5f5;
  color: var(--danger-color);
  border: 1px solid #feb2b2;
}

.success {
  background: #f0fff4;
  color: #276749;
  border: 1px solid #9ae6b4;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1000;
}

.modal-content {
  background: #fff;
  margin: 5% auto;
  border-radius: 10px;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.close-modal-button {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--text-secondary);
  cursor: pointer;
}

.modal-body {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  text-align: right;
}

#modalEmailContentContainer pre,
#modalEmailContentContainer div.email-body-display {
  background: var(--bg-light);
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  font-size: 13px;
  white-space: pre-wrap;
  margin-bottom: 12px;
}

/* Responsive Design */
@media (max-width: 768px) {
  main {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .modal-content {
    width: 95%;
  }
}