.nav-btn {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.85);
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    white-space: nowrap;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: translateY(-1px);
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-btn.active::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 8px;
    transform: translateY(-50%);
    width: 4px;
    height: 60%;
    background: var(--primary);
    border-radius: 2px;
}

/* Logout button special styling */
.nav-user .nav-btn {
    background: rgba(220, 53, 69, 0.9);
    color: white;
    padding: 8px 18px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-user .nav-btn:hover {
    background: rgba(220, 53, 69, 1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

.send-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    height: 48px;
    min-width: 80px;
}

.send-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.send-btn:active:not(:disabled) {
    transform: translateY(0);
}

.send-btn:disabled {
    background: var(--text-tertiary);
    cursor: not-allowed;
    transform: none;
}

.status-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.status-embedded {
    background: #E8F5E9;
    color: var(--success);
}

.status-processing {
    background: #FFF3E0;
    color: var(--warning);
}

.status-queued {
    background: #F3E5F5;
    color: #7B1FA2;
}

.status-error {
    background: #FFEBEE;
    color: var(--error);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-success {
    background: #E8F5E9;
    color: var(--success);
}

.badge-error {
    background: #FFEBEE;
    color: var(--error);
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--text-secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--text-primary);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #45a049;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-warning:hover {
    background: #f57c00;
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover {
    background: var(--error-dark);
}

.action-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.action-btn {
    background: transparent;
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s;
    color: var(--text-secondary);
    white-space: nowrap;
}

.action-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--primary);
}

.action-btn.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.action-btn.primary:hover {
    background: var(--primary-dark);
}

.action-btn.danger {
    border-color: var(--error);
    color: var(--error);
}

.action-btn.danger:hover {
    background: #FFEBEE;
}

.form-group {
    margin-bottom: 20px;
}

.form-hint {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-tertiary);
    font-style: italic;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

.form-input, .form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    background: var(--bg-tertiary);
    transition: all 0.2s;
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(36, 107, 253, 0.1);
}

.form-input[readonly] {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.save-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    margin-top: 8px;
}

.save-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Loading */
.loading {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none;
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-tertiary);
}

.empty-state-text {
    font-size: 14px;
    margin-top: 12px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Screen Headers */
.screen-header {
    margin-bottom: 24px;
}

.screen-header h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.screen-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Modal Styles for Template Editor */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal[style*="display: block"] {
    display: flex !important;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90vw;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
    overflow: hidden; /* Prevent content from overflowing modal */
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 1.5rem 1.5rem 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    flex-shrink: 0; /* Prevent header from shrinking */
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    line-height: 1;
}

.modal-close:hover {
    background: var(--border);
    color: var(--text-primary);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.5rem !important;
    min-height: 0; /* Important for flex scrolling */
    max-height: calc(90vh - 120px); /* Account for header and footer */
    box-sizing: border-box;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    background: var(--bg-tertiary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    flex-shrink: 0; /* Prevent footer from shrinking */
}