/* ============================================
   Admin Panel Stylesheet
   ============================================ */

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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #1e293b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --light-bg: #f8fafc;
    --dark-text: #1e293b;
    --light-text: #64748b;
    --border-color: #e2e8f0;
    --white: #ffffff;
    --sidebar-width: 260px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s ease;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
}

body {
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--dark-text);
    background: var(--light-bg);
}

/* === Login Page === */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 50%, #2563eb 100%);
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-box {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.login-header h1 {
    font-size: 1.75rem;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.login-header p {
    color: var(--light-text);
}

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

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

.login-form label i {
    margin-right: 8px;
    color: var(--primary-color);
}

.login-form input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    transition: var(--transition);
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-login:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.login-footer a:hover {
    text-decoration: underline;
}

.login-info {
    margin-top: 20px;
    text-align: center;
    padding: 15px;
    background: var(--light-bg);
    border-radius: 8px;
}

/* === Admin Wrapper === */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
    width: var(--sidebar-width);
    background: var(--secondary-color);
    color: var(--white);
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: var(--transition);
    z-index: 1000;
}

.sidebar-header {
    padding: 25px 20px;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    text-decoration: none;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-item.active {
    background: var(--primary-color);
    color: var(--white);
    border-left: 4px solid var(--white);
}

.nav-item i {
    font-size: 1.2rem;
    width: 20px;
}

/* === Main Content === */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* === Topbar === */
.topbar {
    background: var(--white);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 999;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-text);
    cursor: pointer;
}

.topbar h2 {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-outline {
    padding: 8px 20px;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition);
}

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

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-name {
    font-weight: 500;
    color: var(--dark-text);
}

.btn-logout {
    padding: 8px 20px;
    background: var(--danger-color);
    color: var(--white);
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition);
}

.btn-logout:hover {
    background: #c0392b;
}

/* === Content Area === */
.content {
    flex: 1;
    padding: 30px;
}

/* === Page Header === */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-header h1 {
    font-size: 2rem;
    color: var(--secondary-color);
}

.btn {
    padding: 10px 25px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* === Dashboard Stats === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.stat-info h3 {
    font-size: 1.75rem;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

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

/* === Content Grid === */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.content-section {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 25px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-bg);
}

.section-header h3 {
    font-size: 1.25rem;
    color: var(--secondary-color);
}

.btn-text {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.btn-text:hover {
    text-decoration: underline;
}

/* === Tables === */
.card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-responsive {
    overflow-x: auto;
}

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

.data-table thead {
    background: var(--light-bg);
}

.data-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--secondary-color);
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: var(--light-bg);
}

.data-table tbody tr.unread {
    background: #fff3cd;
}

.table-link {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
}

.table-link:hover {
    text-decoration: underline;
}

/* === Badges === */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

/* === Action Buttons === */
.actions {
    display: flex;
    gap: 10px;
}

.btn-icon {
    width: 35px;
    height: 35px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    color: var(--dark-text);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.1);
}

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

/* === Popular List === */
.popular-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.popular-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.popular-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.popular-rank {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 30px;
}

.popular-info {
    flex: 1;
}

.popular-title {
    color: var(--dark-text);
    font-weight: 500;
    text-decoration: none;
    display: block;
    margin-bottom: 5px;
}

.popular-title:hover {
    color: var(--primary-color);
}

.popular-meta {
    font-size: 0.875rem;
    color: var(--light-text);
}

/* === Forms === */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 30px;
}

.form-main,
.form-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--light-text);
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.card h3 {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-bg);
}

.card p {
    margin-bottom: 10px;
    color: var(--light-text);
}

.card p strong {
    color: var(--dark-text);
}

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.modal-content {
    background: var(--white);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideDown 0.3s ease;
}

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

.modal-header {
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--light-text);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger-color);
}

.modal-content form {
    padding: 25px;
}

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

.color-badge {
    display: inline-block;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    vertical-align: middle;
    margin-right: 10px;
    border: 2px solid var(--border-color);
}

/* === Message Detail === */
.message-detail {
    padding: 25px;
}

.message-info {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.message-info p {
    margin-bottom: 10px;
    color: var(--dark-text);
}

.message-info strong {
    color: var(--secondary-color);
}

.message-body h4 {
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.message-body p {
    color: var(--dark-text);
    line-height: 1.8;
}

/* === Alerts === */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

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

/* === Footer === */
.admin-footer {
    background: var(--white);
    padding: 20px 30px;
    text-align: center;
    color: var(--light-text);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* === Responsive === */
@media (max-width: 968px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .content-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 640px) {
    .topbar {
        padding: 15px 20px;
    }
    
    .topbar h2 {
        font-size: 1.25rem;
    }
    
    .content {
        padding: 20px 15px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .user-name {
        display: none;
    }
    
    .data-table {
        font-size: 0.875rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px;
    }
}