:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
    --body-bg: #f8f9fa;
    --container-bg: #ffffff;
}

html.dark-mode {
    --primary-color: #3391ff;
    --secondary-color: #8e949a;
    --light-color: #2c2c2e;
    --dark-color: #f0f0f0;
    --border-color: #484848;
    --body-bg: #1c1c1e;
    --container-bg: #2c2c2e;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--body-bg);
    color: var(--dark-color);
    margin: 0;
    padding: 20px;
}

body.modal-open, body.modal-open html {
    overflow: hidden;
    height: 100%;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--container-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, .1);
}

h1, h2, h3 {
    color: var(--primary-color);
}

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

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 700;
}

input[type=text], input[type=password], input[type=datetime-local], input[type=date], textarea, select {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    background-color: var(--container-bg);
    color: var(--dark-color);
}

button {
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
}

button:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
}

.btn-primary { background-color: var(--primary-color); }
.btn-success { background-color: var(--success-color); }
.btn-warning { background-color: var(--warning-color); }
.btn-danger { background-color: var(--danger-color); }
.btn-secondary { background-color: var(--secondary-color); color: #fff; }

.app-header h1 {
    margin-bottom: 2px;
    text-align: left;
}

.app-header, .modal-header, .admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header, .admin-header {
    margin-bottom: 20px;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px 0;
}

.modal-content {
    background-color: var(--container-bg);
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, .3);
    margin: auto;
    display: flex;
    flex-direction: column;
    max-height: 88vh;
}

.modal-body { overflow-y: auto; }

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.modal-header h2 { margin: 0; text-align: left; }

.close-button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-color);
}

.header-actions {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--container-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 100;
    list-style: none;
    padding: 5px 0;
    margin: 5px 0 0 0;
    min-width: 220px;
}

.settings-dropdown.show { display: block; }

.settings-dropdown li a {
    display: block;
    padding: 8px 15px;
    color: var(--dark-color);
    text-decoration: none;
    white-space: nowrap;
}

.settings-dropdown li a:hover { background-color: var(--light-color); }

.dropdown-divider {
    border-top: 1px solid var(--border-color);
    margin: 5px 0;
}

.message-box {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    display: none;
    margin-bottom: 15px;
}

.message-box.success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.message-box.error { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

.balance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.balance-card {
    background-color: var(--light-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.balance-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.balance-card .balance-number {
    font-size: 2.5em;
    font-weight: 700;
    display: block;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.balance-card .balance-label { font-size: 1em; color: var(--secondary-color); }

.section-container, .admin-section-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-top: 25px;
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

.date-info {
    text-align: right;
    font-size: 0.9em;
    color: var(--secondary-color);
    margin-top: -10px;
    margin-bottom: 15px;
    min-height: 1.2em;
}

.leave-checkbox-group {
    display: flex;
    gap: 20px;
    align-items: center;
    margin-top: 10px;
}

.leave-checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: normal;
}

.leave-checkbox-group input { width: auto; }

.leave-table, .admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

.leave-table th, .leave-table td, .admin-table th, .admin-table td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.leave-table th, .admin-table th { background-color: var(--light-color); }

.status-badge {
    padding: 3px 8px;
    border-radius: 12px;
    font-size: .8em;
    color: #fff;
    display: inline-block;
    white-space: nowrap;
}

.status-pending-manager-approval { background-color: var(--warning-color); color: var(--dark-color); }
.status-pending-final-approval { background-color: #17a2b8; }
.status-approved { background-color: var(--success-color); }
.status-rejected { background-color: var(--danger-color); }
.status-cancelled { background-color: var(--secondary-color); }

.emergency-tag {
    background-color: var(--danger-color);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8em;
    margin-left: 8px;
}

.breadcrumb {
    margin-bottom: 20px;
    font-size: 0.9em;
    color: var(--secondary-color);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }

.rejection-remark {
    font-style: italic;
    color: var(--danger-color);
    font-size: 0.9em;
}

.history-filters {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    align-items: flex-end;
    margin-bottom: 20px;
}

.history-filters .form-group { margin-bottom: 0; }
.history-filters .actions { display: flex; gap: 10px; }
.approval-actions { display: flex; gap: 10px; }

#leave-ledger-modal .modal-content { max-width: 700px; }

.ledger-table th:nth-child(3), .ledger-table td:nth-child(3),
.ledger-table th:nth-child(4), .ledger-table td:nth-child(4),
.ledger-table th:nth-child(5), .ledger-table td:nth-child(5) { text-align: center; }

.ledger-table td:nth-child(3) { color: var(--success-color); font-weight: bold; }
.ledger-table td:nth-child(4) { color: var(--danger-color); font-weight: bold; }
.ledger-table td:nth-child(5) { font-weight: bold; }
.ledger-table td:nth-child(2) { max-width: 250px; word-wrap: break-word; }


#loader { text-align: center; padding-top: 50px; font-size: 1.2em; color: var(--secondary-color); }
.admin-header h1 { color: var(--primary-color); margin: 0; text-align: left; }
.admin-section-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); margin-bottom: 15px; padding-bottom: 10px; }
.admin-section-header h2 { text-align: left; margin: 0; border-bottom: none; padding-bottom: 0; }
.config-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.config-item { border: 1px solid var(--border-color); border-radius: 4px; padding: 15px; }
.config-item label { display: block; font-weight: bold; margin-bottom: 8px; }
.config-item .description { font-size: 0.85em; color: var(--secondary-color); margin-bottom: 10px; }
.config-item input, .config-item select { padding: 6px; }
.config-actions { margin-top: 20px; padding-top: 15px; border-top: 1px solid var(--border-color); }
.grid-2-col { display: grid; grid-template-columns: 1fr 2fr; gap: 20px; }
#leave-type-form { padding-right: 20px; border-right: 1px solid var(--border-color); }
.flex-group { display: flex; align-items: center; gap: 10px; }
.flex-group select { flex-grow: 1; }
#balance-adj-form-container { display: none; margin-top: 20px; border-top: 1px solid var(--border-color); padding-top: 20px; }
.balance-adj-table { width: 100%; border-collapse: collapse; }
.balance-adj-table th, .balance-adj-table td { padding: 8px; border-bottom: 1px solid var(--border-color); text-align: left; }
.balance-adj-table th { background-color: var(--light-color); }
.balance-adj-table input[type="number"] { width: 100px; padding: 4px; text-align: center; }
.balance-adj-table .current-balance, .balance-adj-table .new-balance { font-weight: bold; }

/* Dark Mode Specifics */
html.dark-mode .message-box.success { background-color: #1a4325; color: #a6d9b3; border-color: #2c6b3b; }
html.dark-mode .message-box.error { background-color: #4a1e22; color: #f1b0b7; border-color: #8c3842; }
html.dark-mode .balance-label { color: #cccccc; }
html.dark-mode .breadcrumb { color: var(--dark-color); }
html.dark-mode .date-info { color: #cccccc; }
html.dark-mode input[type=date], html.dark-mode input[type="number"] { color-scheme: dark; }