/* =====================================================
   ODTech Solutions - Admin Panel Styles
   ===================================================== */

:root {
    --primary-dark: #0a1628;
    --primary: #0d2137;
    --primary-light: #1a3a5c;
    --secondary: #0ea5e9;
    --secondary-light: #38bdf8;
    --accent: #06b6d4;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --sidebar-width: 260px;
    --topbar-height: 65px;
    --transition: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--gray-100);
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--primary-dark);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    display: flex;
    flex-direction: column;
}

.sidebar-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.sidebar-logo .logo-text .accent {
    color: var(--secondary);
}

.sidebar-logo .logo-tagline {
    font-size: 0.7rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--gray-400);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-nav li a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
}

.sidebar-nav li a.active {
    background: rgba(14, 165, 233, 0.15);
    color: var(--secondary);
    border-left-color: var(--secondary);
}

.sidebar-nav li a i {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.sidebar-nav .badge {
    margin-left: auto;
    padding: 2px 8px;
    background: var(--error);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 50px;
}

.sidebar-nav .nav-divider {
    padding: 15px 20px 10px;
    color: var(--gray-500);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-400);
    font-size: 0.875rem;
}

.sidebar-footer a:hover {
    color: var(--secondary);
}

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

.main-content.expanded {
    margin-left: 0;
}

/* ===== Topbar ===== */
.topbar {
    height: var(--topbar-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
    position: sticky;
    top: 0;
    z-index: 999;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-600);
    cursor: pointer;
    padding: 5px;
}

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

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

.admin-user > span {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: var(--gray-600);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}

.dropdown-toggle:hover {
    background: var(--gray-100);
}

.dropdown-toggle i:first-child {
    font-size: 1.5rem;
    color: var(--secondary);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    color: var(--gray-600);
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background: var(--gray-50);
    color: var(--secondary);
}

.dropdown-menu a:first-child {
    border-radius: 8px 8px 0 0;
}

.dropdown-menu a:last-child {
    border-radius: 0 0 8px 8px;
}

/* ===== Page Content ===== */
.page-content {
    padding: 25px;
}

/* ===== Page Header ===== */
.page-header-admin {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.page-header-admin h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-dark);
}

/* ===== Cards ===== */
.card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: 25px;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.card-body {
    padding: 20px;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: var(--white);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.primary {
    background: rgba(14, 165, 233, 0.15);
    color: var(--secondary);
}

.stat-icon.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.stat-icon.error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.stat-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1;
    margin-bottom: 5px;
}

.stat-info p {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin: 0;
}

/* ===== Tables ===== */
.table-responsive {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-600);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr:hover {
    background: var(--gray-50);
}

.table td {
    color: var(--gray-700);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

.btn-success:hover {
    opacity: 0.9;
}

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

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

.btn-danger:hover {
    opacity: 0.9;
}

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
}

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

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-group label span {
    color: var(--error);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 0.9rem;
    transition: var(--transition);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

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

select.form-control {
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ===== Alerts ===== */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* ===== Badges ===== */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 50px;
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.status-badge.warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.status-badge.error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.status-badge.info {
    background: rgba(14, 165, 233, 0.15);
    color: var(--secondary);
}

/* ===== Actions ===== */
.actions {
    display: flex;
    gap: 8px;
}

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

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--white);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-500);
    cursor: pointer;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ===== Login Page ===== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 20px;
}

.login-box {
    background: var(--white);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

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

.login-logo .logo-text {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.login-logo .logo-text .accent {
    color: var(--secondary);
}

.login-logo p {
    color: var(--gray-500);
    margin-top: 5px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-dark);
}

.login-box .btn {
    width: 100%;
    padding: 14px;
}

/* ===== Image Preview ===== */
.image-preview {
    width: 150px;
    height: 150px;
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: 10px;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview i {
    font-size: 2rem;
    color: var(--gray-400);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: 20px;
}

.empty-state h3 {
    color: var(--gray-600);
    margin-bottom: 10px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: block;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-header-admin {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .admin-user > span {
        display: none;
    }
}