* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: #121212;
    color: #e0e0e0;
    height: 100vh;
    overflow: hidden;
}

/* Login Page */
.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-container {
    background: #1e1e1e;
    padding: 2rem;
    border-radius: 8px;
    width: 350px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.5);
}

.login-container h2 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #bbb;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: #2c2c2c;
    border: 1px solid #3c3c3c;
    color: #fff;
    border-radius: 4px;
}

.btn {
    background: #007bff;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
}

.btn:hover {
    background: #0056b3;
}

.btn.small {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    width: auto;
}

.error {
    background: #ff4444;
    color: white;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

.alert {
    background: #007bff;
    color: white;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

/* App Layout */
.app-container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 250px;
    background: #181818;
    border-right: 1px solid #2a2a2a;
    display: flex;
    flex-direction: column;
}

.brand {
    padding: 1.5rem;
    font-size: 1.25rem;
    font-weight: bold;
    border-bottom: 1px solid #2a2a2a;
}

.compose-btn {
    margin: 1rem;
    width: calc(100% - 2rem);
}

.folder-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.folder-list h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: #888;
    margin: 1.5rem 0 0.5rem;
}

.folder-list ul {
    list-style: none;
}

.folder-list li {
    padding: 0.5rem 1rem;
    margin-bottom: 0.25rem;
    border-radius: 4px;
    cursor: pointer;
    color: #bbb;
}

.folder-list li:hover {
    background: #2a2a2a;
}

.folder-list li.active {
    background: #007bff;
    color: #fff;
}

.settings-link {
    display: block;
    padding: 1rem;
    color: #888;
    text-decoration: none;
    border-top: 1px solid #2a2a2a;
    margin-top: auto;
}

.settings-link:hover {
    color: #fff;
}

.main-content {
    flex: 1;
    display: flex;
    background: #121212;
}

.email-list-pane {
    width: 350px;
    border-right: 1px solid #2a2a2a;
    display: flex;
    flex-direction: column;
    background: #1a1a1a;
}

.pane-header {
    padding: 1rem;
    border-bottom: 1px solid #2a2a2a;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.icon-btn {
    background: transparent;
    border: 1px solid #3c3c3c;
    color: #bbb;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    cursor: pointer;
}

.icon-btn:hover {
    background: #2a2a2a;
}

.email-list {
    flex: 1;
    overflow-y: auto;
}

.email-item {
    padding: 1rem;
    border-bottom: 1px solid #2a2a2a;
    cursor: pointer;
}

.email-item:hover {
    background: #222;
}

.email-item.unread {
    font-weight: bold;
    color: #fff;
}

.email-item .sender {
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    color: #bbb;
}

.email-item.unread .sender {
    color: #fff;
}

.email-item .subject {
    font-size: 1rem;
}

.email-item .date {
    font-size: 0.75rem;
    color: #666;
    float: right;
}

.email-view-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #121212;
}

.empty-state {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: #666;
    font-size: 1.2rem;
}

.email-header {
    padding: 1.5rem;
    border-bottom: 1px solid #2a2a2a;
}

.email-header h2 {
    margin-bottom: 0.5rem;
}

.email-meta {
    color: #888;
    font-size: 0.9rem;
}

.email-body {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
}

.modal-content {
    background-color: #1e1e1e;
    margin: 5% auto;
    width: 600px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid #2a2a2a;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close {
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: #fff;
}

.modal-body {
    padding: 1.5rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #2a2a2a;
    text-align: left;
}

.data-table th {
    color: #888;
    font-size: 0.9rem;
    text-transform: uppercase;
}

#address-select {
    width: 100%;
    padding: 0.5rem;
    background: #2a2a2a;
    border: none;
    color: white;
    border-radius: 4px;
}