/* Admin Panel Styles */
:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    animation: slideUp 0.3s ease-out;
}

.modal-large {
    max-width: 700px;
}

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

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h2 {
    color: var(--gray-900);
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.login-hint {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    width: 100%;
    justify-content: center;
}

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

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

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

.btn-icon {
    padding: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--gray-600);
    transition: all 0.3s ease;
    border-radius: 6px;
}

.btn-icon:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* Admin Panel */
.admin-panel {
    min-height: 100vh;
    display: none;
}

/* Header */
.admin-header {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    border-radius: 8px;
}

.logo-section h1 {
    font-size: 1.5rem;
    color: var(--gray-900);
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Stats Cards */
.stats-container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.unread-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.read-icon {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.total-icon {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.stat-content p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

/* Filters Section */
.filters-section {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-group label {
    font-weight: 500;
    color: var(--gray-700);
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--gray-300);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.5rem;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
}

.search-box svg {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

/* Table Container */
.table-container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem 2rem;
}

.messages-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.messages-table thead {
    background: var(--gray-50);
}

.messages-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.messages-table td {
    padding: 1rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.9rem;
}

.message-row {
    transition: background-color 0.3s ease;
}

.message-row:hover {
    background: var(--gray-50);
}

.message-row.status-unread {
    background: rgba(79, 70, 229, 0.03);
}

.message-preview {
    color: var(--gray-600);
    max-width: 300px;
}

.actions {
    display: flex;
    gap: 0.5rem;
}

/* Badge Styles */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-unread {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.badge-read {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-archived {
    background: rgba(156, 163, 175, 0.1);
    color: var(--gray-600);
}

/* Empty State */
.empty-state,
.loading-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

.empty-state svg {
    color: var(--gray-300);
    margin-bottom: 1rem;
}

.empty-state h3 {
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--gray-600);
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* Message Details Modal */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.5rem;
    color: var(--gray-900);
}

.close-btn {
    padding: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    transition: all 0.3s ease;
    border-radius: 6px;
}

.close-btn:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.message-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-row {
    display: flex;
    gap: 1rem;
}

.detail-row strong {
    min-width: 100px;
    color: var(--gray-700);
}

.detail-row.full-width {
    flex-direction: column;
}

.message-content {
    background: var(--gray-50);
    padding: 1rem;
    border-radius: 8px;
    color: var(--gray-800);
    line-height: 1.6;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.modal-actions .btn {
    flex: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .filters-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: 100%;
    }
    
    .messages-table {
        font-size: 0.85rem;
    }
    
    .messages-table th,
    .messages-table td {
        padding: 0.75rem 0.5rem;
    }
    
    .message-preview {
        max-width: 150px;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}