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

:root {
    --color-primary: #10b981;
    --color-primary-dark: #047857;
    --color-primary-light: #6ee7b7;
    --color-secondary: #0f766e;
    --color-tertiary: #14b8a6;
    --color-danger: #dc2626;
    --color-warning: #ea580c;
    --color-success: #059669;
    --color-bg: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-lighter: #94a3b8;
    --color-border: #cbd5e1;
    --color-white: #ffffff;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --border-radius: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 28px 0 rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px 0 rgba(0, 0, 0, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #f0fdf4 100%);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #1B5E20 0%, #0d3d12 100%);
    color: var(--color-white);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    z-index: 100;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.logo-image {
    width: 100%;
    height: auto;
    max-width: 200px;
    display: block;
}

.logo h1 {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -0.5px;
    margin: 0;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    font-weight: 500;
    font-size: 15px;
    border-left: 3px solid transparent;
    position: relative;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--color-white);
    transform: translateX(4px);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    border-left-color: var(--color-white);
    font-weight: 600;
}

.icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.topbar {
    background: linear-gradient(90deg, var(--color-white) 0%, #f0fdf4 100%);
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-bottom: 1px solid rgba(16, 185, 129, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
}

.topbar h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-bg-dark);
    letter-spacing: -0.5px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.user-name {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 600;
    padding-left: var(--spacing-lg);
    border-left: 1px solid rgba(16, 185, 129, 0.1);
}

/* Pages */
.page {
    flex: 1;
    overflow-y: auto;
    display: none;
}

.page.active {
    display: block;
}

.page > div {
    padding: var(--spacing-2xl);
    max-width: 1600px;
    margin: 0 auto;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: linear-gradient(135deg, var(--color-white) 0%, #f5fff9 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(16, 185, 129, 0.08);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-tertiary));
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(16, 185, 129, 0.2);
}

.stat-icon {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
    color: var(--color-primary);
    filter: drop-shadow(0 2px 4px rgba(16, 185, 129, 0.1));
}

.stat-content {
    flex: 1;
}

.stat-title {
    font-size: 11px;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-subtitle {
    font-size: 13px;
    color: var(--color-text-light);
    font-weight: 500;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.chart-card {
    background: linear-gradient(135deg, var(--color-white) 0%, #f5fff9 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(16, 185, 129, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chart-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(16, 185, 129, 0.15);
}

.chart-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-bg-dark);
    letter-spacing: -0.3px;
}

/* Tables Grid */
.tables-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
    gap: var(--spacing-xl);
}

.table-card {
    background: linear-gradient(135deg, var(--color-white) 0%, #f5fff9 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(16, 185, 129, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.table-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(16, 185, 129, 0.15);
}

.table-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-bg-dark);
    letter-spacing: -0.3px;
}

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

.data-table.full-width {
    width: 100%;
}

.data-table thead {
    background: linear-gradient(90deg, rgba(16, 185, 129, 0.05) 0%, transparent 100%);
}

.data-table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 700;
    font-size: 12px;
    color: var(--color-primary-dark);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-bottom: 2px solid rgba(16, 185, 129, 0.15);
}

.data-table td {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(16, 185, 129, 0.05);
    font-size: 14px;
    color: var(--color-text);
}

.data-table tbody tr {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.data-table tbody tr:hover {
    background-color: rgba(16, 185, 129, 0.04);
}

.status-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid;
}

.status-active {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    color: var(--color-primary-dark);
    border-color: rgba(16, 185, 129, 0.2);
}

.status-on_leave {
    background: linear-gradient(135deg, rgba(234, 88, 12, 0.1) 0%, rgba(234, 88, 12, 0.05) 100%);
    color: #92400e;
    border-color: rgba(234, 88, 12, 0.2);
}

.status-inactive {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.1) 0%, rgba(220, 38, 38, 0.05) 100%);
    color: #7f1d1d;
    border-color: rgba(220, 38, 38, 0.2);
}

/* Controls */
.employees-controls {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.search-input,
.filter-select {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    color: var(--color-text);
    background-color: var(--color-white);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
}

.search-input {
    flex: 1;
    min-width: 250px;
}

.filter-select {
    min-width: 150px;
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1), inset 0 1px 2px rgba(0, 0, 0, 0.02);
    background-color: #f5fff9;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(16, 185, 129, 0.02);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-primary), var(--color-tertiary));
    border-radius: 5px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--color-primary-dark), var(--color-primary));
    border: 2px solid transparent;
    background-clip: padding-box;
}

/* Login Page */
#loginPage {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1B5E20 0%, #0d3d12 100%);
}

.login-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

.login-card {
    background: linear-gradient(135deg, var(--color-white) 0%, #f5fff9 100%);
    border-radius: 20px;
    padding: var(--spacing-2xl) var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 400px;
    border: 1px solid rgba(16, 185, 129, 0.1);
}

.login-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-xl);
    display: block;
}

.login-card h1 {
    text-align: center;
    font-size: 28px;
    color: var(--color-bg-dark);
    margin-bottom: var(--spacing-2xl);
    font-weight: 700;
    letter-spacing: -0.5px;
}

#loginForm {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    color: var(--color-text);
    background-color: var(--color-white);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1), inset 0 1px 2px rgba(0, 0, 0, 0.02);
    background-color: #f5fff9;
}

.btn-primary {
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-tertiary));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.error-message {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: rgba(220, 38, 38, 0.1);
    color: #7f1d1d;
    border-radius: var(--border-radius);
    border: 1px solid rgba(220, 38, 38, 0.2);
    font-size: 14px;
    font-weight: 500;
}

/* Logout Button */
.btn-logout {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: none;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-logout:hover {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

/* Dashboard Container */
#dashboardContainer {
    display: flex;
    height: 100vh;
}

/* Responsive */
@media (max-width: 1200px) {
    .charts-grid,
    .tables-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 60px;
        padding: var(--spacing-lg);
    }

    .logo,
    .nav-link span:last-child {
        display: none;
    }

    .nav-link {
        justify-content: center;
        padding: var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .topbar {
        padding: var(--spacing-lg);
    }

    .topbar h2 {
        font-size: 18px;
    }

    .page > div {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-card {
        flex-direction: column;
        text-align: center;
    }

    .data-table {
        font-size: 12px;
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }
}