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

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --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;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.5;
}

/* Pages */
.page {
    display: none;
}

.page.active {
    display: flex;
}

/* Login Page */
#loginPage {
    width: 100vw;
    height: 100vh;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.login-card h1 {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.subtitle {
    text-align: center;
    color: var(--gray-500);
    margin-bottom: 2rem;
}

/* Dashboard Layout */
#dashboardPage {
    width: 100vw;
    height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--gray-900);
    color: white;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid var(--gray-800);
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.sidebar-subtitle {
    color: var(--gray-400);
    font-size: 0.875rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--gray-300);
    text-decoration: none;
    transition: all 0.2s;
}

.nav-item:hover {
    background: var(--gray-800);
    color: white;
}

.nav-item.active {
    background: var(--primary);
    color: white;
}

.nav-icon {
    width: 24px;
    margin-right: 0.75rem;
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-800);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.user-details {
    flex: 1;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--gray-400);
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    background: var(--gray-50);
}

.content-section {
    display: none;
    padding: 2rem;
}

.content-section.active {
    display: block;
}

.content-header {
    margin-bottom: 2rem;
}

.content-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.content-header p {
    color: var(--gray-500);
}

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

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

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

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

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

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

.btn-secondary:hover {
    background: var(--gray-600);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 56px;
    height: 56px;
    background: var(--gray-100);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
}

.stat-label {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* Table */
.table-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

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

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

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-200);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--gray-100);
}

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

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

/* Messages */
.error-message {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: none;
}

.error-message.show {
    display: block;
}

.message-box {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.message-box.info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

/* 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);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #666;
    line-height: 1;
    padding: 0;
    width: 30px;
    height: 30px;
}

.modal-close:hover {
    color: #333;
}

.modal-content form {
    padding: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="color"],
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
}

.form-group input[type="color"] {
    height: 40px;
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

.form-group input[type="checkbox"] {
    margin-right: 8px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 15px 0 0;
    border-top: 1px solid #e0e0e0;
    margin-top: 20px;
}

.btn-block {
    width: 100%;
}