/*
================================================
Net Salary Calculator Kenya - salary.css
================================================
Author: Joweni.com & Gemini
Version: 1.6 (Final Release - Complete Styling)
Description: Main stylesheet for the comprehensive
             Kenyan salary calculator application.
             This version adds complete styling for all
             form elements, icons, and dynamic components
             to ensure full visual consistency.
================================================
*/

/* --------------------------------------------------
1. ROOT VARIABLES & THEME SETUP
--------------------------------------------------
*/
:root {
    /* Color Palette - Modern & Trustworthy */
    --primary-green: #28A745;
    --primary-green-dark: #1E7E34;
    --primary-green-light: #C8E6C9;
    --primary-green-hover-bg: #E8F5E9;
    --primary-green-focus-shadow: rgba(40, 167, 69, 0.15);

    --secondary-blue: #007BFF;
    --secondary-blue-dark: #0056B3;

    /* Neutral Grays */
    --neutral-gray-900: #161C2D;
    --neutral-gray-800: #273043;
    --neutral-gray-700: #4A5568;
    --neutral-gray-600: #6B7280;
    --neutral-gray-400: #A0AEC0;
    --neutral-gray-300: #CBD5E0;
    --neutral-gray-200: #E2E8F0;
    --neutral-gray-100: #F1F5F9;
    --neutral-gray-50: #F8FAFC;

    --text-on-primary: #FFFFFF;
    --text-on-dark-bg: #F3F4F6;

    /* Semantic Colors */
    --color-error: #EF4444;
    --color-success: #10B981;
    --color-info: var(--secondary-blue);
    --color-warning: #F59E0B;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-monospace: 'Roboto Mono', monospace;
    --font-notebook: 'Courier Prime', monospace;
    --font-size-base: 16px;
    --line-height-base: 1.7;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Spacing & Layout */
    --spacing-unit: 8px;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --max-width-container: 1280px;
    --transition-speed: 0.3s;

    /* Semantic color variables for messages */
    --color-error-bg: #FEF2F2;
    --color-success-bg: #ECFDF5;
    --color-warning-bg: #FFFBEB;
}

/* Light Theme (Default) */
[data-theme="light"] {
    --color-background-page: var(--neutral-gray-50);
    --color-background-card: #FFFFFF;
    --color-background-hover: var(--primary-green-hover-bg);
    --color-background-notebook: #FFFCF5;
    --color-text-primary: var(--neutral-gray-900);
    --color-text-secondary: var(--neutral-gray-700);
    --color-text-placeholder: var(--neutral-gray-600);
    --color-border: var(--neutral-gray-200);
    --color-input-background: #FFFFFF;
    --color-input-border: var(--neutral-gray-300);
    --color-footer-bg: var(--neutral-gray-900);
    --color-footer-text: var(--neutral-gray-400);
    --color-footer-heading: var(--text-on-dark-bg);
    --color-chart-text: var(--neutral-gray-700);
    --color-chart-grid: var(--neutral-gray-200);
}

/* Dark Theme */
[data-theme="dark"] {
    --color-background-page: #0b1120;
    --color-background-card: #161C2D;
    --color-background-hover: rgba(40, 167, 69, 0.1);
    --color-background-notebook: #1a2233;
    --color-text-primary: var(--text-on-dark-bg);
    --color-text-secondary: #94a3b8;
    --color-text-placeholder: #64748b;
    --color-border: #334155;
    --color-input-background: #1e293b;
    --color-input-border: #475569;
    --color-footer-bg: #020617;
    --color-footer-text: #94a3b8;
    --color-footer-heading: #FFFFFF;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-chart-text: #94a3b8;
    --color-chart-grid: #334155;
}

/* --------------------------------------------------
2. BASE & GLOBAL STYLES
--------------------------------------------------
*/
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-background-page);
    color: var(--color-text-primary);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    max-width: var(--max-width-container);
    margin-left: auto;
    margin-right: auto;
    padding: 0 calc(var(--spacing-unit) * 2);
}

.divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: calc(var(--spacing-unit) * 3) 0;
}

/* --------------------------------------------------
3. HEADER & NAVIGATION
--------------------------------------------------
*/
.app-header {
    background-color: var(--color-background-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-speed);
    width: 100%;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo-link {
    text-decoration: none;
}

.logo-text {
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.app-controls {
    display: none;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.control-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

.main-nav {
    border-top: 1px solid var(--color-border);
}

.nav-links-container {
    display: flex;
    justify-content: center;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 1);
    padding: var(--spacing-unit) 0;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition-speed), background-color var(--transition-speed);
    border-radius: var(--border-radius-md);
}

.nav-link.active,
.nav-link:hover {
    color: var(--text-on-primary);
    background-color: var(--primary-green);
}

.nav-link.active {
    font-weight: var(--font-weight-semibold);
}

.nav-link:hover {
    background-color: var(--primary-green-dark);
}

.icon-small {
    width: 16px;
    height: 16px;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    padding: var(--spacing-unit);
    z-index: 110;
    animation: fadeIn 0.2s ease-out;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu-item {
    display: block;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
}

.dropdown-menu-item:hover {
    background-color: var(--color-background-hover);
    color: var(--color-text-primary);
}

.mobile-menu-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: var(--spacing-unit);
}

.mobile-nav-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--color-background-card);
    box-shadow: var(--shadow-lg);
    padding: calc(var(--spacing-unit) * 3);
    transition: left 0.4s ease-in-out;
    z-index: 101;
    display: flex;
    flex-direction: column;
}

.mobile-nav-menu.open {
    left: 0;
}

.main-nav {
    display: none;
}

/* --------------------------------------------------
4. MAIN CONTENT & LAYOUT
--------------------------------------------------
*/
main {
    padding: calc(var(--spacing-unit) * 4) 0;
}

.card {
    background-color: var(--color-background-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.card-header {
    padding: calc(var(--spacing-unit) * 3);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    display: flex;
    align-items: center;
    gap: var(--spacing-unit);
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.card-content {
    padding: calc(var(--spacing-unit) * 3);
}

.section-title,
.section-title-alt {
    text-align: center;
    font-size: 2rem;
    font-weight: var(--font-weight-extrabold);
    margin-bottom: calc(var(--spacing-unit) * 4);
    line-height: 1.2;
}

.section-title-alt {
    text-align: left;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-unit);
}

.hero-card {
    background-color: var(--color-background-card);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 5);
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: 2.2rem;
    font-weight: var(--font-weight-extrabold);
}

.hero-title #locationName {
    color: var(--primary-green);
}

.hero-text {
    max-width: 800px;
    margin: calc(var(--spacing-unit) * 2) auto 0;
    font-size: 1.05rem;
    line-height: 1.8;
}

.hero-text+.hero-text {
    margin-top: calc(var(--spacing-unit) * 2.5);
}

.scroll-to-calculator-btn {
    margin-top: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
}

.hero-illustration {
    position: absolute;
    bottom: -20px;
    right: -20px;
    opacity: 0.1;
    color: var(--primary-green);
    z-index: 1;
}
.hero-illustration svg {
    width: 150px;
    height: 150px;
}


.main-calculator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 4);
}

.input-column,
.results-column {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 4);
}

.side-by-side-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 4);
}

/* --------------------------------------------------
5. FORM ELEMENTS & INPUTS
--------------------------------------------------
*/
.input-group {
    margin-bottom: calc(var(--spacing-unit) * 2.5);
}

.input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.input-wrapper {
    position: relative;
}

.input-wrapper .currency-symbol {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-placeholder);
    font-weight: var(--font-weight-medium);
    pointer-events: none;
}

/* FIX: Added input[type="number"] to style all numeric inputs consistently */
input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
    border: 1px solid var(--color-input-border);
    border-radius: var(--border-radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--color-input-background);
    color: var(--color-text-primary);
}

input[type="file"] {
    padding: var(--spacing-unit);
    border: 1px solid var(--color-input-border);
    border-radius: var(--border-radius-md);
    background-color: var(--color-input-background);
    color: var(--color-text-primary);
    font-size: 0.9rem;
}

input[type="text"].currency-input {
    padding-left: calc(var(--spacing-unit) * 4);
    font-family: var(--font-monospace);
    font-weight: var(--font-weight-medium);
}

input:focus,
select:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px var(--primary-green-focus-shadow);
}

.input-sub-group {
    display: flex;
    gap: var(--spacing-unit);
}

.input-sub-group .input-wrapper {
    flex-grow: 1;
}

.salary-period-select {
    width: auto;
    flex-shrink: 0;
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-input-border);
    background-color: var(--color-input-background);
    color: var(--color-text-primary);
    font-size: 1rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 20px;
    padding-right: 30px;
}
[data-theme="dark"] .salary-period-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}


.advanced-options-wrapper {
    margin-top: calc(var(--spacing-unit) * 4);
    border-top: 1px solid var(--color-border);
    padding-top: calc(var(--spacing-unit) * 3);
}

.advanced-options-wrapper summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: var(--font-weight-semibold);
    font-size: 1.1rem;
    cursor: pointer;
    list-style: none;
    padding-bottom: var(--spacing-unit);
}

.advanced-options-wrapper summary::-webkit-details-marker {
    display: none;
}
.advanced-options-wrapper summary::marker {
    display: none;
}

.advanced-options-wrapper summary i {
    transition: transform 0.2s ease;
}

.advanced-options-wrapper[open] summary i {
    transform: rotate(180deg);
}

.advanced-subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-unit);
}

.advanced-options .input-group {
    padding: var(--spacing-unit);
    border-radius: var(--border-radius-md);
    transition: background-color 0.2s;
    margin-bottom: var(--spacing-unit);
}

.advanced-options .input-group:hover {
    background-color: var(--color-background-hover);
}

.checkbox-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    cursor: pointer;
    padding: var(--spacing-unit);
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: var(--font-weight-normal);
    cursor: pointer;
    flex-grow: 1;
    display: flex;
    align-items: center;
    gap: 4px;
}

input[type="checkbox"] {
    width: 1.25em;
    height: 1.25em;
    cursor: pointer;
    accent-color: var(--primary-green);
    flex-shrink: 0;
}

.hidden-input-area {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out, margin-top 0.4s ease-in-out, opacity 0.4s ease-in-out;
    opacity: 0;
}

.hidden-input-area.visible {
    max-height: 100px;
    margin-top: var(--spacing-unit);
    opacity: 1;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-unit);
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--primary-green);
    color: var(--text-on-primary);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-input-border);
}

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

.btn-full-width {
    width: 100%;
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 2);
    margin-top: var(--spacing-unit);
}
.action-buttons .btn {
    flex-grow: 1;
    min-width: 120px;
}

/* --------------------------------------------------
6. RESULTS & DATA DISPLAY
--------------------------------------------------
*/
.net-salary-display {
    padding: calc(var(--spacing-unit) * 3);
    text-align: center;
    background: linear-gradient(45deg, var(--primary-green), var(--primary-green-dark));
    color: white;
    border-radius: var(--border-radius-lg);
    position: relative;
}

.net-salary-display .label {
    font-size: 1.1rem;
    opacity: 0.9;
}

.net-salary-display .amount {
    font-family: var(--font-monospace);
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -1px;
    margin-top: var(--spacing-unit);
}

.effective-tax-rate-display {
    font-size: 0.9rem;
    margin-top: var(--spacing-unit);
    opacity: 0.8;
}
.effective-tax-rate-display span {
    font-weight: var(--font-weight-semibold);
}

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

.results-table tr {
    border-bottom: 1px solid var(--color-border);
}

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

.results-table td {
    padding: calc(var(--spacing-unit) * 1.5) 0;
    vertical-align: middle;
}

.results-table .label {
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.results-table .sub-item {
    padding-left: calc(var(--spacing-unit) * 3);
}

.results-table .amount {
    text-align: right;
    font-family: var(--font-monospace);
    font-weight: var(--font-weight-medium);
}

.results-table .highlight {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.results-table .deduction {
    color: var(--color-error);
}

.results-table .income {
    color: var(--color-success);
}

.results-table .total-row td {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    border-top: 2px solid var(--color-border);
    padding-top: calc(var(--spacing-unit) * 2);
    padding-bottom: calc(var(--spacing-unit) * 2);
}

.scenario-result-box {
    text-align: center;
    font-weight: 500;
    margin-top: var(--spacing-unit);
    padding: var(--spacing-unit);
    background-color: var(--color-background-hover);
    border-radius: var(--border-radius-md);
    min-height: 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.scenario-result-box p {
    margin: 0;
    line-height: 1.4;
}
.scenario-result-box strong {
    font-family: var(--font-monospace);
    font-weight: var(--font-weight-bold);
}

/* Charts */
.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
    margin-top: calc(var(--spacing-unit) * 4);
}
.chart-container canvas {
    max-width: 100%;
    max-height: 100%;
}

/* Saved Calculations List */
.saved-list {
    list-style: none;
    padding: 0;
    margin-top: calc(var(--spacing-unit) * 2);
}
.saved-list li {
    background-color: var(--color-background-hover);
    border-radius: var(--border-radius-md);
    padding: calc(var(--spacing-unit) * 1.5);
    margin-bottom: var(--spacing-unit);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    transition: background-color 0.2s;
}
.saved-list li:hover {
    background-color: var(--primary-green-light);
    color: var(--neutral-gray-900);
}
[data-theme="dark"] .saved-list li:hover {
    background-color: rgba(40, 167, 69, 0.2);
    color: var(--text-on-dark-bg);
}

.saved-list li .saved-amount {
    font-family: var(--font-monospace);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-green);
}
[data-theme="dark"] .saved-list li .saved-amount {
    color: var(--color-success);
}

/* FIX: Added styles for saved calculation buttons */
.saved-actions {
    display: flex;
    gap: calc(var(--spacing-unit) / 2);
}
.saved-list .load-btn,
.saved-list .delete-btn {
    background: none;
    border: 1px solid transparent;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, border-color 0.2s;
}
.saved-list .load-btn {
    color: var(--color-info);
}
.saved-list .delete-btn {
    color: var(--color-error);
}
.saved-list .load-btn:hover {
    background-color: rgba(0, 123, 255, 0.1);
    border-color: rgba(0, 123, 255, 0.2);
}
.saved-list .delete-btn:hover {
    background-color: var(--color-error-bg);
    border-color: rgba(239, 68, 68, 0.2);
}


/* --- NSSF & SHIF Rates Tables --- */
.rates-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 4);
}

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

.rates-table th,
.rates-table td {
    padding: calc(var(--spacing-unit) * 1.5);
    text-align: left;
    border: 1px solid var(--color-border);
}

.rates-table th {
    font-weight: 600;
    background-color: var(--color-background-hover);
}

.rates-table tr.highlight-row {
    background-color: var(--primary-green-hover-bg) !important;
    font-weight: 600;
}

[data-theme="dark"] .rates-table tr.highlight-row {
    background-color: rgba(40, 167, 69, 0.2) !important;
}


/* --------------------------------------------------
7. FULL WIDTH SECTIONS & NOTEBOOK STYLES
--------------------------------------------------
*/
.full-width-section {
    margin-top: calc(var(--spacing-unit) * 6);
}

.calculation-log-box {
    background-color: var(--color-background-notebook);
    padding: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius-md);
    font-family: var(--font-monospace);
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--color-text-secondary);
    min-height: 100px;
    border: 1px solid var(--color-border);
    line-height: 1.6;
}
.calculation-log-box strong {
    color: var(--color-text-primary);
}


/* Notebook / Pencil Design for Guide Section */
.guide-notebook-card {
    background-color: var(--color-background-notebook);
    border: 1px solid var(--color-border);
    position: relative;
    padding-left: calc(var(--spacing-unit) * 6);
}

.guide-notebook-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: calc(var(--spacing-unit) * 4);
    bottom: 0;
    width: 1px;
    background-color: rgba(239, 68, 68, 0.4);
}

.guide-article {
    --line-height-notebook: 32px;
    background-image: repeating-linear-gradient(transparent,
            transparent calc(var(--line-height-notebook) - 1px),
            rgba(0, 123, 255, 0.2) calc(var(--line-height-notebook) - 1px),
            rgba(0, 123, 255, 0.2) var(--line-height-notebook));
    font-family: var(--font-notebook);
    line-height: var(--line-height-notebook);
    color: var(--color-text-primary);
}

.guide-article h3 {
    margin-top: var(--line-height-notebook);
    margin-bottom: 0;
    font-weight: var(--font-weight-bold);
    background-color: var(--color-background-notebook);
    display: inline;
    padding-right: var(--spacing-unit);
}

.guide-article p,
.guide-article li {
    font-size: 1rem;
    padding: 0;
    margin: 0;
    background-color: var(--color-background-notebook);
}
.guide-article ul {
    list-style: disc;
}

.guide-article ul,
.guide-article ol {
    padding-left: calc(var(--spacing-unit) * 4);
    margin-top: var(--line-height-notebook);
    margin-bottom: var(--line-height-notebook);
}

.guide-article .table-container {
    margin-top: var(--line-height-notebook);
    margin-bottom: var(--line-height-notebook);
    overflow-x: auto;
}

.guide-article table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    background-color: var(--color-background-card);
}

.guide-article th,
.guide-article td {
    border: 1px solid var(--color-border);
    padding: var(--spacing-unit);
    text-align: left;
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
}

.guide-article th {
    background-color: var(--color-background-hover);
}

/* FAQ Styling */
.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    transition: background-color .2s;
    margin-bottom: var(--spacing-unit);
}

.faq-item:hover {
    background-color: var(--primary-green-hover-bg);
}

.faq-item[open] {
    background-color: var(--primary-green-hover-bg);
}

.faq-item summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--spacing-unit) * 2);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    list-style: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::marker {
    display: none;
}

.faq-question {
    flex-grow: 1;
    text-align: left;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: var(--spacing-unit);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 2);
    color: var(--color-text-secondary);
    text-align: left;
}

.faq-answer p {
    margin: 0;
}

[data-theme="dark"] .faq-item:hover,
[data-theme="dark"] .faq-item[open] {
    background-color: var(--color-background-hover);
}

[data-theme="dark"] .faq-item[open] summary {
    color: var(--color-text-primary);
}

[data-theme="dark"] .faq-answer {
    color: var(--color-text-secondary);
}

/* --------------------------------------------------
8. FOOTER
--------------------------------------------------
*/
.site-footer {
    margin-top: calc(var(--spacing-unit) * 8);
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    width: 100%;
    
}

.footer-content-wrapper {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 5) calc(var(--spacing-unit) * 2);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: calc(var(--spacing-unit) * 4);
    padding-bottom: calc(var(--spacing-unit) * 3);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--color-footer-heading);
}

.footer-column p,
.footer-column li {
    font-size: 0.9rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}

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

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: calc(var(--spacing-unit) * 3);
    text-align: center;
    font-size: 0.85rem;
}

.footer-bottom p {
    margin-bottom: calc(var(--spacing-unit) / 2);
}

.footer-bottom strong {
    color: var(--color-footer-heading);
}

/* --------------------------------------------------
9. PAYSLIP MODAL & PRINT STYLES
--------------------------------------------------
*/
input.invalid {
    border-color: var(--color-error);
}

.message-container {
    padding: calc(var(--spacing-unit) * 1.5);
    margin-bottom: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius-md);
    font-weight: var(--font-weight-medium);
}

.message-container.error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.message-container.success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.message-text {
    font-size: 0.85rem;
    color: var(--color-error);
    margin-top: 4px;
    min-height: 1.2em;
}

.results-table .total-row .amount-wrapper {
    background-color: var(--color-background-hover);
    padding: var(--spacing-unit);
    border-radius: var(--border-radius-md);
    display: inline-block;
}

/* Mobile Navigation Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease-in-out, visibility 0.4s ease-in-out;
    z-index: 100;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Mobile Navigation Header and Footer */
.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--spacing-unit) * 2);
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav-header .logo-text {
    font-size: 1rem;
}

.mobile-menu-close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.mobile-nav-content {
    padding: calc(var(--spacing-unit) * 2);
    flex-grow: 1;
    overflow-y: auto;
}

/* Mobile Navigation Menu Item Overrides */
.mobile-nav-content .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
}

.mobile-nav-content .nav-link {
    display: block;
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
}

.mobile-nav-content .dropdown .nav-link {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.mobile-nav-content .dropdown-menu {
    position: static;
    display: block;
    border: none;
    box-shadow: none;
    padding: 0;
    padding-left: var(--spacing-unit);
    background-color: transparent;
    min-width: auto;
}

.mobile-nav-content .dropdown-menu-item {
    padding: calc(var(--spacing-unit) * 1.5);
    width: 100%;
    color: var(--color-text-secondary);
}

.mobile-nav-content .dropdown-menu-item:hover {
    background-color: var(--primary-green-hover-bg);
}

.mobile-nav-footer {
    padding: calc(var(--spacing-unit) * 2);
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

/* Professional Payslip Modal Styles */
.payslip-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-unit);
    animation: fadeIn .3s;
}

.payslip-container {
    background-color: #fff;
    color: #333;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    width: 100%;
    max-width: 800px;
    padding: calc(var(--spacing-unit) * 4);
    border: 1px solid #ccc;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
    animation: fadeIn .3s;
    overflow-y: auto;
    max-height: 90vh;
}

.payslip-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 3px solid #333;
    padding-bottom: var(--spacing-unit);
}

.payslip-company-name {
    margin: 0;
    font-size: 1.8rem;
}

.payslip-header p {
    margin: 4px 0 0;
    font-size: 0.9rem;
    color: #666;
}

.payslip-logo img {
    max-height: 50px;
    width: auto;
    object-fit: contain;
}

.payslip-title {
    text-align: center;
    margin: calc(var(--spacing-unit) * 2) 0;
    font-weight: bold;
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.payslip-employee-details {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-unit) 0;
    border-bottom: 1px solid #eee;
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: 0.9rem;
    flex-wrap: wrap;
}
.payslip-employee-details > div {
    flex: 1 1 48%;
    min-width: 250px;
}
.payslip-employee-details p {
    margin: 2px 0;
}

.payslip-main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--spacing-unit) * 4);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.payslip-column h4 {
    border-bottom: 1px solid #eee;
    padding-bottom: 4px;
    margin-bottom: 8px;
    font-size: 1rem;
}

.payslip-column table {
    width: 100%;
}

.payslip-column td {
    padding: 4px 0;
    font-size: 0.9rem;
}

.payslip-column td.amount {
    text-align: right;
    font-family: var(--font-monospace);
}

.payslip-summary {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: calc(var(--spacing-unit) * 2);
    margin-top: calc(var(--spacing-unit) * 3);
    border-top: 3px solid #333;
    padding-top: var(--spacing-unit);
}

.payslip-summary-item {
    text-align: right;
}

.payslip-summary-item p {
    margin: 0;
    color: #666;
    font-size: 0.9rem;
}

.payslip-summary-item strong {
    font-size: 1.1rem;
}

.payslip-summary-item.net-pay {
    background-color: #f5f5f5;
    padding: var(--spacing-unit);
    border-radius: var(--border-radius-sm);
    text-align: center;
}

.payslip-summary-item.net-pay p {
    font-weight: bold;
    color: #333;
}

.payslip-summary-item.net-pay strong {
    font-size: 1.5rem;
    color: var(--primary-green);
}

.payslip-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: calc(var(--spacing-unit) * 5);
    padding-top: var(--spacing-unit);
    font-size: 0.8rem;
    color: #666;
}

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

.payslip-stamp {
    border: 2px dashed #ccc;
    padding: calc(var(--spacing-unit) * 3);
    color: #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 120px;
    min-height: 80px;
}

.payslip-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-unit);
    margin-top: calc(var(--spacing-unit) * 3);
    padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid #eee;
}

@media print {
    body > * {
        visibility: hidden;
    }

    .payslip-modal-overlay,
    .payslip-modal-overlay * {
        visibility: visible;
    }

    .payslip-modal-overlay {
        position: static !important;
        background-color: transparent !important;
        display: block !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    .payslip-container {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        max-width: 100%;
        box-shadow: none;
        border: none;
        color: #000;
        padding: 20mm !important;
        max-height: none;
    }

    .payslip-actions {
        display: none !important;
    }
    .payslip-logo img {
        filter: grayscale(100%);
    }
    .payslip-summary-item.net-pay {
        background-color: #e0e0e0 !important;
    }
}

/* --------------------------------------------------
10. RESPONSIVE DESIGN & MEDIA QUERIES
--------------------------------------------------
*/
@media (max-width: 1023px) {

    .main-nav,
    .app-controls {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }
    .hero-illustration {
        display: none;
    }
    .hero-card {
        padding: calc(var(--spacing-unit) * 3);
    }
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-text {
        font-size: 0.95rem;
    }
    .scroll-to-calculator-btn {
        font-size: 0.9rem;
        padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    }
    .main-calculator-grid {
        grid-template-columns: 1fr;
    }
    .side-by-side-grid {
        grid-template-columns: 1fr;
    }
    .payslip-main-content {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing-unit) * 2);
    }
    .payslip-summary {
        grid-template-columns: 1fr;
    }
    .payslip-summary-item {
        text-align: left;
    }
    .payslip-summary-item.net-pay {
        text-align: center;
    }
    .payslip-employee-details > div {
        flex: 1 1 100%;
        min-width: unset;
    }
    .payslip-footer {
        flex-direction: column;
        align-items: center;
        gap: calc(var(--spacing-unit) * 3);
    }
}

@media (min-width: 640px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .hero-title {
        font-size: 2.8rem;
    }
    .action-buttons .btn {
        flex-grow: unset;
        width: auto;
    }
    .action-buttons {
        justify-content: center;
    }
}

@media (min-width: 768px) {
    .app-controls {
        display: flex;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .net-salary-display .amount {
        font-size: 3rem;
    }

    .side-by-side-grid {
        grid-template-columns: 1fr 1fr;
    }

    .rates-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero-illustration {
        display: block;
    }
}

@media (min-width: 1024px) {
    .main-nav {
        display: block;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .main-calculator-grid {
        grid-template-columns: 450px 1fr;
    }
    .payslip-main-content {
        grid-template-columns: 1fr 1fr;
    }
    .payslip-summary {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .payslip-summary-item {
        text-align: right;
    }
    .payslip-employee-details > div {
        flex: 1 1 48%;
    }
    .payslip-footer {
        flex-direction: row;
        justify-content: space-between;
    }
}
/* --------------------------------------------------
11. KEYFRAME ANIMATIONS
--------------------------------------------------
*/
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --------------------------------------------------
12. MISC & NEW FEATURE STYLES
--------------------------------------------------
*/

/* Sticky Net Pay Summary */
.sticky-net-pay-summary {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--primary-green);
    color: var(--text-on-primary);
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
    box-shadow: var(--shadow-lg);
    z-index: 99;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-100%);
    transition: transform 0.3s ease-out, opacity 0.3s ease-out, visibility 0.3s ease-out;
}

.sticky-net-pay-summary.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sticky-net-pay-summary .label {
    font-size: 0.9rem;
    margin-right: var(--spacing-unit);
    opacity: 0.9;
}

.sticky-net-pay-summary .amount {
    font-family: var(--font-monospace);
    font-size: 1.2rem;
    font-weight: var(--font-weight-bold);
}

/* Info Icon & Tooltip */
.info-icon {
    color: var(--color-info);
    cursor: help;
    position: relative;
}

.info-icon[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--neutral-gray-800);
    color: white;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-md);
    font-size: 0.85rem;
    font-family: var(--font-primary);
    white-space: nowrap;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
}

.info-icon[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Chart Containers */
.chart-container {
    background-color: var(--color-background-card);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    margin-top: calc(var(--spacing-unit) * 3);
}
.chart-container h4 {
    margin-bottom: calc(var(--spacing-unit) * 2);
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

/* Saved Calculations List */
.saved-list li .saved-info {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.saved-list li .saved-info span {
    font-weight: var(--font-weight-medium);
}
.saved-list li .saved-info .saved-date {
    font-size: 0.75rem;
    color: var(--neutral-gray-600);
}
[data-theme="dark"] .saved-list li .saved-info .saved-date {
    color: var(--neutral-gray-400);
}

/* Financial Goal Planner & Tax Optimization */
#financial-planning .card-content {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}
#financial-planning .card-content .input-group {
    margin-bottom: 0;
}
#goalProjectionResult, #taxOptimizationTips, #costOfLivingResult {
    text-align: left;
    margin-top: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 1.5);
    background-color: var(--color-background-hover);
    border-radius: var(--border-radius-md);
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    min-height: 80px;
}
#taxOptimizationTips strong {
    color: var(--primary-green);
}

/* Cost of Living Comparison */
#cost-of-living .card-content {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}
#cost-of-living .card-content .input-group {
    margin-bottom: 0;
}
#costOfLivingResult ul {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-unit);
}
#costOfLivingResult li {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px dashed var(--color-border);
    font-size: 0.9rem;
}
#costOfLivingResult li:last-child {
    border-bottom: none;
}
#costOfLivingResult .total-row {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-unit);
    margin-top: var(--spacing-unit);
}
#costOfLivingResult .disposable-income {
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-green);
    margin-top: var(--spacing-unit);
    text-align: center;
}
[data-theme="dark"] #costOfLivingResult .disposable-income {
    color: var(--color-success);
}

/* Payslip Modal Specifics */
.payslip-employee-details p strong {
    min-width: 90px;
    display: inline-block;
}

/* Responsive adjustments for new sections */
@media (max-width: 767px) {
    .chart-container {
        height: 250px;
    }
    .payslip-summary {
        grid-template-columns: 1fr;
    }
    .payslip-summary-item {
        text-align: center;
    }
    .payslip-employee-details > div {
        flex: 1 1 100%;
    }
    .payslip-main-content {
        grid-template-columns: 1fr;
    }
    .side-by-side-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .hero-illustration {
        width: 100px;
        height: 100px;
    }
    .sticky-net-pay-summary .amount {
        font-size: 1.5rem;
    }
}