:root {
    --primary-color: #dc3545;
    --secondary-color: #28a745;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --border-color: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 50px;
    width: auto;
}

.site-title {
    font-size: 1.5rem;
    font-weight: bold;
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    gap: 8px;
}

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

.btn-primary:hover {
    background-color: #c82333;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #218838;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
    color: white;
}

.btn-outline:hover {
    background-color: white;
    color: var(--dark-color);
}

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

.btn-light:hover {
    background-color: var(--light-color);
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1.1rem;
}

/* Navigation */
.main-nav {
    background-color: var(--dark-color);
    padding: 10px 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-menu a:hover, .nav-menu a.active {
    background-color: var(--primary-color);
}

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px 20px;
    font-weight: bold;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    background-color: var(--light-color);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.stat-card.green {
    border-left-color: var(--secondary-color);
}

.stat-card.red {
    border-left-color: var(--primary-color);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-icon.green {
    background: linear-gradient(135deg, var(--secondary-color), #20c997);
}

.stat-icon.red {
    background: linear-gradient(135deg, var(--primary-color), #fd7e14);
}

.stat-icon.blue {
    background: linear-gradient(135deg, #007bff, #17a2b8);
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--dark-color);
}

.stat-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Grid Layout */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--dark-color);
    color: white;
    font-weight: 500;
}

tr:hover {
    background-color: var(--light-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 10px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 10px 10px 0 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

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

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

.badge-warning {
    background-color: #ffc107;
    color: var(--dark-color);
}

.badge-info {
    background-color: #17a2b8;
    color: white;
}

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

/* Notifications */
.notification-bell {
    position: relative;
    cursor: pointer;
}

.notification-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--primary-color);
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* Sidebar (Dashboard) */
.dashboard-layout {
    display: flex;
    min-height: calc(100vh - 120px);
}

.sidebar {
    width: 280px;
    background-color: var(--dark-color);
    color: white;
    padding: 20px 0;
    flex-shrink: 0;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 25px;
    color: #adb5bd;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.sidebar-menu li a:hover, .sidebar-menu li a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: var(--primary-color);
}

.sidebar-menu li a i {
    width: 20px;
    text-align: center;
}

.dashboard-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.pagination a, .pagination span {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    text-decoration: none;
    color: var(--dark-color);
    transition: all 0.3s;
}

.pagination a:hover, .pagination .active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Search */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 30px 0;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.footer-section a {
    color: #adb5bd;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    margin-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #adb5bd;
}

/* Social Share */
.social-share {
    display: flex;
    gap: 10px;
}

.social-share a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: transform 0.3s;
}

.social-share a:hover {
    transform: scale(1.1);
}

.social-share .facebook {
    background-color: #3b5998;
}

.social-share .twitter {
    background-color: #1da1f2;
}

.social-share .whatsapp {
    background-color: #25d366;
}

.social-share .linkedin {
    background-color: #0077b5;
}

/* Chat */
.chat-container {
    display: flex;
    height: calc(100vh - 200px);
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.chat-sidebar {
    width: 300px;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
}

.chat-contact {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s;
}

.chat-contact:hover, .chat-contact.active {
    background-color: var(--light-color);
}

.chat-contact img {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.chat-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 70%;
    padding: 12px 15px;
    border-radius: 15px;
}

.message.sent {
    align-self: flex-end;
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 5px;
}

.message.received {
    align-self: flex-start;
    background-color: var(--light-color);
    border-bottom-left-radius: 5px;
}

.chat-input {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
}

.chat-input input {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
}

/* Profile */
.profile-header {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.profile-info h2 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.profile-info p {
    color: var(--text-muted);
}

/* Status indicators */
.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 8px;
}

.status-online {
    background-color: var(--secondary-color);
}

.status-offline {
    background-color: var(--text-muted);
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar-menu li a span {
        display: none;
    }
    
    .sidebar-menu li a {
        justify-content: center;
        padding: 15px;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .dashboard-layout {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        padding: 10px 0;
    }
    
    .sidebar-menu {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .sidebar-menu li a {
        padding: 10px 15px;
    }
    
    .sidebar-menu li a span {
        display: inline;
    }
    
    .chat-sidebar {
        width: 100%;
        height: 200px;
    }
    
    .chat-container {
        flex-direction: column;
        height: auto;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-content {
        margin: 10px;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .card-footer {
        flex-direction: column;
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}