.datagrid {
    margin: 0 auto;
    overflow: hidden;
}

:root {
    --primary-color: #2a5c85;
    --secondary-color: #1e3a5f;
    --accent-color: #00b894;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #fff;
    --gray-light: #f8f9fa;
    --gray-medium: #e9ecef;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

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

/* Header & Navigation */
header {
    background-color: white;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

.logo span {
    color: var(--secondary-color);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
    overflow: visible;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: var(--accent-color);
    bottom: 0;
    left: 0;
    border-radius: 3px;
}

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

.user-menu span {
    margin-right: 1rem;
    font-weight: 500;
    color: var(--dark-color);
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

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

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

.btn-accent:hover {
    background-color: #00a085;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-icon {
    margin-right: 0.5rem;
}

/* Main Content */
.main-container {
    display: flex;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    min-height: calc(100vh - 300px);
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-right: 2rem;
    height: fit-content;
}

.sidebar-section {
    margin-bottom: 2rem;
}

.sidebar-section h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--gray-medium);
    font-size: 1.2rem;
}

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

.sidebar-links li {
    margin-bottom: 0.8rem;
}

.sidebar-links a {
    text-decoration: none;
    color: var(--text-color);
    display: flex;
    align-items: center;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.sidebar-links a:hover {
    background-color: var(--gray-medium);
    color: var(--primary-color);
}

.sidebar-links a.active {
    background-color: var(--primary-color);
    color: white;
}

.sidebar-links i {
    margin-right: 0.8rem;
    width: 20px;
    text-align: center;
}

/* Content Area */
.content {
    flex: 1;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    overflow: hidden;
}

.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--gray-medium);
}

.page-header h1 {
    color: var(--secondary-color);
    font-size: 1.8rem;
}

.page-header p {
    color: #666;
    margin-top: 0.5rem;
}

/* Home Page */
.hero {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-top: 4px solid var(--accent-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.feature-card i {
    margin-right: 0.8rem;
    color: var(--accent-color);
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin-top: 1.5rem;
}

.status-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.status-active {
    background-color: rgba(0, 184, 148, 0.2);
    color: var(--accent-color);
}

.status-pending {
    background-color: rgba(243, 156, 18, 0.2);
    color: var(--warning-color);
}

.status-expired {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--danger-color);
}

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

.form-row {
    display: flex;
    gap: 1.5rem;
}

.form-row .form-group {
    flex: 1;
}

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

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(42, 92, 133, 0.2);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--gray-medium);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.3rem;
    color: var(--secondary-color);
}

.card-body {
    color: #666;
}

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

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
}

.modal-header {
    width: 90%;
    padding: 1rem 2rem 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
}

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

.tab-container {
    display: flex;
    border-bottom: 2px solid var(--gray-medium);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.8rem 1.5rem;
    background: none;
    border: none;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    position: relative;
}

.tab.active {
    color: var(--primary-color);
}

.tab.active::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    bottom: -2px;
    left: 0;
    border-radius: 3px;
}

.tab-content {
    display: none;
}

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

/* Footer */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 3rem 2rem 1.5rem;
    margin-top: 3rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--light-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #bbb;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #bbb;
    font-size: 0.9rem;
}

.footer-bottom a{
    color: #bbb;
    text-decoration: none;
    transition: var(--transition);
    padding-left: 0.5rem;
}

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

/* Responsive Design */
@media (max-width: 992px) {
    .main-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        margin-right: 0;
        margin-bottom: 2rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }

    .main-container {
        padding: 0 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

.mb-1 {
    margin-bottom: 1rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.mt-1 {
    margin-top: 1rem;
}

.mt-2 {
    margin-top: 2rem;
}

.d-none {
    display: none;
}

.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: rgba(0, 184, 148, 0.2);
    color: var(--accent-color);
    border-left: 4px solid var(--accent-color);
}

.alert-warning {
    background-color: rgba(243, 156, 18, 0.2);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

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

/* Mobile Sidebar */
@media (max-width: 992px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        z-index: 99;
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 0;
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 1rem;
        border-radius: var(--border-radius);
    }

    .nav-links a:hover {
        background-color: var(--gray-light);
    }
}

.autoscroll-box {
    overflow-y: auto;
}