:root {
    --primary-color: #9333ea;
    --primary-dark: #7c3aed;
    --secondary-color: #a855f7;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-bg: #1f2937;
    --white: #ffffff;
    --text-dark: #e5e7eb;
    --text-light: #9ca3af;
    --border-color: #374151;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.4);
    --card-bg: #2d3748;
    --input-bg: #374151;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #111827;
    min-height: 100vh;
    color: var(--text-dark);
}

/* Login Page */
.login-body {
    background: #111827;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 420px;
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #9333ea, #7c3aed);
    color: var(--white);
    padding: 40px 30px;
    text-align: center;
}

.login-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.login-form {
    padding: 40px 30px;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, #9333ea, #7c3aed);
    color: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.header-content h1 {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.user-info span {
    font-size: 15px;
    font-weight: 500;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px;
}

/* Forms */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
    background: var(--input-bg);
    color: var(--text-dark);
}

.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(124, 58, 237, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: var(--text-light);
}

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

.form-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    max-width: 800px;
    margin: 0 auto;
}

.form-container h2 {
    color: var(--primary-color);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 30px;
}

.action-buttons-large {
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: #4a6a94;
}

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

.btn-success:hover {
    background: #218838;
}

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

.btn-warning:hover {
    background: #e0a800;
}

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

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn .icon {
    font-size: 18px;
    margin-right: 4px;
}

/* Action Bar */
.action-bar {
    background: var(--card-bg);
    padding: 20px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    box-shadow: var(--shadow);
}

.filter-form {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.filter-group label {
    font-weight: 500;
    color: var(--text-dark);
    white-space: nowrap;
}

.filter-group select {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: var(--input-bg);
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

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

.data-table thead {
    background: linear-gradient(135deg, #7c3aed, #9333ea);
    color: var(--white);
}

.data-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.data-table tbody tr:hover {
    background: #374151;
}

.data-table tbody tr:last-child {
    border-bottom: none;
}

.data-table td {
    padding: 16px 20px;
    font-size: 14px;
}

.no-data {
    text-align: center;
    color: var(--text-light);
    padding: 40px 20px !important;
    font-style: italic;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-pending {
    background: #fff3cd;
    color: #856404;
}

.status-approved {
    background: #d4edda;
    color: #155724;
}

.status-rejected {
    background: #f8d7da;
    color: #721c24;
}

.status-change_requested {
    background: #d1ecf1;
    color: #0c5460;
}

/* Action Buttons in Table */
.action-buttons {
    display: flex;
    gap: 8px;
}

/* Task Info Box */
.task-info-box {
    background: var(--input-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.info-row {
    display: flex;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row .label {
    font-weight: 600;
    min-width: 150px;
    color: var(--text-dark);
}

.info-row .value {
    flex: 1;
    color: var(--text-light);
}

/* Messages */
.error-message {
    color: var(--danger-color);
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 16px 0;
    font-size: 14px;
    display: none;
}

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

.success-message {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 16px 0;
    font-size: 14px;
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 400px;
    padding: 16px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    animation: slideIn 0.3s ease;
    transition: opacity 0.3s ease;
}

.notification.success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.notification.error {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {

/* Calendar - start week on Monday */
input[type="date"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
}

input[type="date"]::-webkit-datetime-edit-fields-wrapper {
    display: flex;
}

/* Time input - 24h format already default in HTML5 */
input[type="time"] {
    -webkit-appearance: none;
}
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .user-info {
        justify-content: center;
    }

    .action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-form {
        flex-direction: column;
    }

    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }

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

    .data-table {
        font-size: 13px;
    }

    .data-table th,
    .data-table td {
        padding: 12px 10px;
    }

    .action-buttons {
        flex-direction: column;
    }

    .main-content {
        padding: 16px;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .notification {
        left: 20px;
        right: 20px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .login-header h1 {
        font-size: 22px;
    }

    .header-content h1 {
        font-size: 20px;
    }
}


/* Checkbox styling */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}