/* ==========================================================================
   Design System & Custom Properties
   ========================================================================== */
:root {
    /* Color Palette */
    --primary-ie: #10b981;      /* Ireland Emerald Green */
    --primary-ie-hover: #059669;
    --primary-gb: #2563eb;      /* UK Royal Blue */
    --primary-gb-hover: #1d4ed8;
    
    /* Light Theme (Only) */
    --bg-app: #f8fafc;
    --bg-card: #ffffff;
    --bg-input: #f1f5f9;
    --border-color: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-inverse: #ffffff;
    
    --chart-net: #e2e8f0;
    --chart-vat: var(--primary-ie);
    
    /* Box Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Global Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.app-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.header-main-row {
    display: flex;
    align-items: center;
}

.menu-toggle {
    display: none;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    transition: transform 0.2s ease;
}

.logo:hover {
    transform: scale(1.02);
}

.logo-svg {
    width: 1.75rem;
    height: 1.75rem;
    color: var(--primary-ie);
}
body.country-gb .logo-svg {
    color: var(--primary-gb);
}

.logo-text span {
    color: var(--primary-ie);
}
body.country-gb .logo-text span {
    color: var(--primary-gb);
}

/* Navigation Links */
.app-nav {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--text-main);
    background-color: var(--bg-input);
}

.nav-link.active {
    color: var(--text-inverse);
    background-color: var(--primary-ie);
}
body.country-gb .nav-link.active {
    background-color: var(--primary-gb);
}

@media (max-width: 900px) {
    .header-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .app-nav {
        justify-content: center;
        width: 100%;
    }
}

/* ==========================================================================
   Hero & Layout Structure
   ========================================================================== */
.calculator-hero {
    padding: 2.5rem 0 1.5rem;
}

.hero-text {
    text-align: center;
    max-width: 850px;
    margin: 0 auto 2.5rem;
}

.hero-text h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.hero-text .subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

@media (max-width: 900px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Calculator Cards (Form & Output)
   ========================================================================== */
.calculator-card, .results-card, .card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.results-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Country Selector (Tabs) */
.country-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background-color: var(--bg-input);
    padding: 0.35rem;
    border-radius: 0.75rem;
}

.country-tab {
    flex: 1;
    border: none;
    background: none;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.country-tab.active {
    background-color: var(--bg-card);
    color: var(--text-main);
    box-shadow: var(--shadow-sm);
}

/* Mode Selector (Add / Remove) */
.mode-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.mode-option {
    flex: 1;
    cursor: pointer;
}

.mode-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.mode-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    height: 100%;
}

.mode-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    background-color: var(--bg-input);
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.1rem;
}

.mode-label {
    display: flex;
    flex-direction: column;
    font-weight: 600;
    font-size: 0.95rem;
}

.mode-label small {
    font-weight: 400;
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 0.15rem;
}

/* Active State Styles dynamically updated via JavaScript country classes */
body.country-ie .mode-option input:checked + .mode-box {
    border-color: var(--primary-ie);
}
body.country-ie .mode-option input:checked + .mode-box .mode-icon {
    background-color: var(--primary-ie);
    color: white;
}

body.country-gb .mode-option input:checked + .mode-box {
    border-color: var(--primary-gb);
}
body.country-gb .mode-option input:checked + .mode-box .mode-icon {
    background-color: var(--primary-gb);
    color: white;
}

/* Form inputs styling */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group > label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol {
    position: absolute;
    left: 1.25rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-muted);
    pointer-events: none;
}

.input-wrapper input {
    width: 100%;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem 1rem 2.5rem;
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    background-color: var(--bg-card);
    color: var(--text-main);
    outline: none;
    transition: all 0.2s ease;
}

body.country-ie .input-wrapper input:focus {
    border-color: var(--primary-ie);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15);
}
body.country-gb .input-wrapper input:focus {
    border-color: var(--primary-gb);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

/* Remove default spin buttons for inputs */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type=number] {
    -moz-appearance: textfield;
}

/* Rate Presets Grid */
.rate-presets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(65px, 1fr));
    gap: 0.5rem;
}

.rate-btn {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-main);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.rate-btn:hover {
    background-color: var(--bg-input);
}

body.country-ie .rate-btn.active {
    background-color: var(--primary-ie);
    border-color: var(--primary-ie);
    color: white;
}

body.country-gb .rate-btn.active {
    background-color: var(--primary-gb);
    border-color: var(--primary-gb);
    color: white;
}

/* Custom Rate Input wrapper */
.custom-rate-wrapper {
    margin-top: 0.75rem;
    animation: slideDown 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-rate-input input {
    font-size: 1.25rem;
    padding: 0.75rem 2.25rem 0.75rem 1rem;
}

.rate-suffix {
    position: absolute;
    right: 1.25rem;
    font-weight: 600;
    color: var(--text-muted);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Quick SEO links */
.quick-lookups {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

.quick-title {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.quick-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.quick-btn {
    border: none;
    background-color: var(--bg-input);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 0.65rem;
    border-radius: 0.35rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.quick-btn:hover {
    color: var(--text-main);
    transform: translateY(-1px);
}

body.country-ie .quick-btn:hover {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--primary-ie-hover);
}
body.country-gb .quick-btn:hover {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-gb-hover);
}

/* ==========================================================================
   Results Component
   ========================================================================== */
.results-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-main);
}

.results-grid {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-bottom: 1.5rem;
}

.result-item {
    background-color: var(--bg-input);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
}

.result-item.highlight {
    border-left: 4px solid var(--primary-ie);
}
body.country-gb .result-item.highlight {
    border-left-color: var(--primary-gb);
}

.result-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.result-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.result-label .subtext {
    font-weight: 400;
    opacity: 0.8;
}

.result-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    word-break: break-all;
}

.text-accent {
    color: var(--primary-ie);
}
body.country-gb .text-accent {
    color: var(--primary-gb);
}

/* Copy Clipboard Button */
.copy-btn {
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    border-radius: 0.25rem;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    color: var(--text-main);
    background-color: rgba(0,0,0,0.05);
}

.copy-icon {
    width: 1.1rem;
    height: 1.1rem;
}

/* Tooltip Alert */
.tooltip {
    position: absolute;
    bottom: 125%;
    right: 50%;
    transform: translateX(50%) translateY(5px);
    background-color: #0f172a;
    color: #ffffff;
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    pointer-events: none;
    opacity: 0;
    transition: all 0.2s ease;
    white-space: nowrap;
    z-index: 10;
}

.copy-btn.copied .tooltip {
    opacity: 1;
    transform: translateX(50%) translateY(0);
}

/* SVG Donut Chart */
.chart-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.donut-chart {
    width: 120px;
    height: 120px;
    transform: rotate(-90deg); /* Start at top */
}

.donut-track {
    stroke: var(--border-color);
}

.donut-segment {
    stroke-linecap: round;
    transition: stroke-dasharray 0.4s ease;
}

.donut-net {
    stroke: var(--bg-input);
}

.donut-vat {
    stroke: var(--primary-ie);
}
body.country-gb .donut-vat {
    stroke: var(--primary-gb);
}

.donut-text-group {
    transform: rotate(90deg);
    transform-origin: center;
}

.donut-percent {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    fill: var(--text-main);
}

.donut-sub {
    font-size: 0.7rem;
    font-weight: 600;
    fill: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.chart-legend {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legend-color {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
}

.legend-net-color {
    background-color: var(--border-color);
}

.legend-vat-color {
    background-color: var(--primary-ie);
}
body.country-gb .legend-vat-color {
    background-color: var(--primary-gb);
}

/* Save History Button */
.save-history-btn {
    width: 100%;
    border: none;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    padding: 0.85rem;
    border-radius: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: white;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.save-history-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

body.country-ie .save-history-btn {
    background-color: var(--primary-ie);
}
body.country-ie .save-history-btn:hover {
    background-color: var(--primary-ie-hover);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

body.country-gb .save-history-btn {
    background-color: var(--primary-gb);
}
body.country-gb .save-history-btn:hover {
    background-color: var(--primary-gb-hover);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* ==========================================================================
   History Section
   ========================================================================== */
.history-section {
    margin-bottom: 2rem;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.history-header h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.clear-history-btn {
    border: 1px solid var(--border-color);
    background: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.clear-history-btn:hover {
    background-color: #ef4444;
    border-color: #ef4444;
    color: white;
}

.history-empty {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-style: italic;
}

.table-responsive {
    overflow-x: auto;
    border-radius: 0.75rem;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.history-table th, .history-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.history-table th {
    background-color: var(--bg-input);
    color: var(--text-muted);
    font-weight: 600;
    font-family: var(--font-heading);
}

.history-table tbody tr {
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.history-table tbody tr:hover {
    background-color: var(--bg-input);
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-ie {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--primary-ie-hover);
}

.badge-gb {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-gb-hover);
}

.badge-mode-add {
    background-color: rgba(245, 158, 11, 0.1);
    color: #d97706;
}

.badge-mode-remove {
    background-color: rgba(99, 102, 241, 0.1);
    color: #4f46e5;
}

.history-action-btn {
    border: none;
    background: none;
    cursor: pointer;
    color: #ef4444;
    padding: 0.25rem;
    border-radius: 0.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s ease;
}

.history-action-btn:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

.history-action-btn svg {
    width: 1.1rem;
    height: 1.1rem;
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   Informational Layout (Formula grids, Guides, FAQs)
   ========================================================================== */
.formula-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .formula-info-grid {
        grid-template-columns: 1fr;
    }
}

.formula-card h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.formula-box {
    background-color: var(--bg-input);
    border-radius: 0.75rem;
    padding: 1rem;
    margin: 1.25rem 0;
    border-left: 4px solid var(--text-muted);
}

body.country-ie .formula-box {
    border-left-color: var(--primary-ie);
}
body.country-gb .formula-box {
    border-left-color: var(--primary-gb);
}

.formula-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.formula-code {
    font-family: monospace;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
}

.example-box {
    font-size: 0.9rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 1rem;
}

.example-box code {
    background-color: var(--bg-input);
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
    font-family: monospace;
}

/* Comprehensive Guide */
.vat-guide {
    margin-bottom: 3rem;
}

.vat-guide h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.intro {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 900px;
}

.guide-section {
    margin-bottom: 2.5rem;
}

.guide-section h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.rates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 1.25rem 0;
}

.rate-detail-card {
    background-color: var(--bg-input);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.rate-detail-card h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.steps-list {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.steps-list li {
    margin-bottom: 0.75rem;
}

/* Accordion FAQs */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    background-color: var(--bg-card);
    border: none;
    color: var(--text-main);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    text-align: left;
    padding: 1.15rem 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: background-color 0.2s ease;
}

.accordion-header:hover {
    background-color: var(--bg-input);
}

.accordion-arrow {
    width: 0.75rem;
    height: 0.75rem;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.accordion-item.active .accordion-arrow {
    transform: rotate(180deg);
}

.accordion-content {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.25s cubic-bezier(0, 1, 0, 1), padding 0.25s ease, opacity 0.25s ease;
}

.accordion-item.active .accordion-content {
    padding: 1.25rem 1.5rem;
    max-height: 1000px; /* Big enough to fit text */
    opacity: 1;
    transition: max-height 0.25s cubic-bezier(1, 0, 1, 0), padding 0.25s ease, opacity 0.25s ease;
}

.accordion-content p {
    margin-bottom: 0.75rem;
}

.accordion-content p:last-child {
    margin-bottom: 0;
}

.accordion-content code {
    background-color: var(--bg-input);
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
    font-family: monospace;
}

.resources-list {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.resources-list li {
    margin-bottom: 0.75rem;
}

.resources-list a {
    color: var(--primary-ie-hover);
    text-decoration: none;
    font-weight: 500;
}
body.country-gb .resources-list a {
    color: var(--primary-gb);
}

.resources-list a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Footer Component (Multi-column layout)
   ========================================================================== */
.app-footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2.5rem;
    text-align: left;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s ease;
}

.footer-links a:hover {
    color: var(--text-main);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.disclaimer {
    max-width: 900px;
    margin: 0 auto;
    font-size: 0.75rem;
    opacity: 0.8;
    line-height: 1.5;
}

.footer-author {
    font-weight: 500;
    color: var(--text-main);
}

.footer-author a {
    color: var(--primary-ie-hover);
    text-decoration: none;
}
body.country-gb .footer-author a {
    color: var(--primary-gb);
}

.footer-author a:hover {
    text-decoration: underline;
}

/* Helper accessibility class */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ==========================================================================
   Turnover Tracker (Threshold Page) Styles
   ========================================================================== */
.tracker-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 100%;
    justify-content: center;
}

.progress-container {
    margin: 1rem 0;
}

.progress-bar-bg {
    width: 100%;
    height: 1.25rem;
    background-color: var(--bg-input);
    border-radius: 9999px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    border-radius: 9999px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease;
}

/* Progress bar color status levels */
.progress-safe {
    background-color: #10b981; /* Green */
}

.progress-warning {
    background-color: #f59e0b; /* Orange */
}

.progress-danger {
    background-color: #ef4444; /* Red */
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.advice-box {
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.5;
    border-left: 4px solid #3b82f6;
    background-color: var(--bg-input);
}

.advice-box.advice-safe {
    border-left-color: #10b981;
}

.advice-box.advice-warning {
    border-left-color: #f59e0b;
}

.advice-box.advice-danger {
    border-left-color: #ef4444;
}

/* ==========================================================================
   VIES Validator Checker Styles
   ========================================================================== */
.checker-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.select-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.select-wrapper select {
    width: 100%;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.85rem 2.5rem 0.85rem 1.25rem;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    background-color: var(--bg-card);
    color: var(--text-main);
    outline: none;
    cursor: pointer;
    appearance: none;
    transition: all 0.2s ease;
}

.select-wrapper::after {
    content: "▼";
    font-size: 0.75rem;
    color: var(--text-muted);
    position: absolute;
    right: 1.25rem;
    pointer-events: none;
}

.checker-input input {
    font-size: 1.25rem;
    padding: 0.85rem 1.25rem;
    text-transform: uppercase;
}

.validate-btn {
    width: 100%;
    border: none;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    padding: 0.9rem;
    border-radius: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: white;
    background-color: var(--primary-ie);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.validate-btn:hover {
    background-color: var(--primary-ie-hover);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.validation-spinner {
    width: 1.25rem;
    height: 1.25rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.checker-result-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    justify-content: center;
    min-height: 250px;
}

.validation-response-box {
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    animation: slideDown 0.3s ease;
}

.validation-response-box.valid-res {
    border-color: #10b981;
    background-color: rgba(16, 185, 129, 0.05);
}

.validation-response-box.invalid-res {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.05);
}

.res-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
}

.res-header-valid {
    color: #10b981;
}

.res-header-invalid {
    color: #ef4444;
}

.res-details {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.res-details strong {
    color: var(--text-main);
}

.hmrc-button-wrapper {
    margin-top: 0.5rem;
}

.hmrc-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: #00703c; /* UK Gov Green */
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.6rem 1rem;
    border-radius: 0.35rem;
    transition: background-color 0.2s ease;
}

.hmrc-btn:hover {
    background-color: #005a30;
}

/* ==========================================================================
   Tourist Refund Estimator Styles
   ========================================================================== */
.refund-card-ui {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.slider-wrapper {
    margin: 1rem 0;
}

.range-slider {
    width: 100%;
    height: 0.5rem;
    border-radius: 9999px;
    background-color: var(--bg-input);
    outline: none;
    appearance: none;
    cursor: pointer;
}

/* Slider thumb style customization */
.range-slider::-webkit-slider-thumb {
    appearance: none;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background-color: var(--primary-ie);
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.1s ease;
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.refund-result-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 0.5rem 0;
}

.refund-result-item {
    background-color: var(--bg-input);
    border-radius: 0.75rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.refund-result-item.highlight-refund {
    grid-column: span 2;
    background-color: rgba(16, 185, 129, 0.1);
    border: 2px solid var(--primary-ie);
}

.refund-res-val {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
}

.refund-res-val-big {
    font-size: 2rem;
    color: var(--primary-ie-hover);
}

.refund-disclaimer {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
    text-align: center;
}

/* Calculator actions layout & Share Button */
.calculator-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    width: 100%;
}

.share-btn {
    flex: 1;
    border: 2px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-main);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    padding: 0.85rem;
    border-radius: 0.75rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    position: relative;
}

.share-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

body.country-ie .share-btn:hover {
    border-color: var(--primary-ie);
    color: var(--primary-ie-hover);
    background-color: rgba(16, 185, 129, 0.05);
}

body.country-gb .share-btn:hover {
    border-color: var(--primary-gb);
    color: var(--primary-gb-hover);
    background-color: rgba(37, 99, 235, 0.05);
}

.share-btn.copied .tooltip {
    opacity: 1;
    transform: translateX(50%) translateY(0);
}

/* Export History Button */
.export-history-btn {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

body.country-ie .export-history-btn:hover {
    border-color: var(--primary-ie);
    color: var(--primary-ie-hover);
    background-color: rgba(16, 185, 129, 0.05);
}

body.country-gb .export-history-btn:hover {
    border-color: var(--primary-gb);
    color: var(--primary-gb-hover);
    background-color: rgba(37, 99, 235, 0.05);
}

/* ==========================================================================
   Header Search & Visual Breadcrumbs
   ========================================================================== */
.header-search {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    padding: 0.25rem 0.5rem 0.25rem 1rem;
    max-width: 260px;
    width: 100%;
    transition: all 0.2s ease;
}
.header-search:focus-within {
    border-color: var(--primary-ie);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}
body.country-gb .header-search:focus-within {
    border-color: var(--primary-gb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
#site-search-input {
    border: none;
    background: transparent;
    color: var(--text-main);
    font-size: 0.85rem;
    font-family: inherit;
    width: 100%;
    outline: none;
    padding: 0.25rem 0;
}
#site-search-input::placeholder {
    color: var(--text-muted);
}
#site-search-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}
#site-search-btn:hover {
    color: var(--text-main);
    background-color: var(--border-color);
}
#site-search-btn svg {
    width: 1rem;
    height: 1rem;
}

/* Autocomplete Suggestion Dropdown */
.search-results-dropdown {
    position: absolute;
    top: 115%;
    left: 0;
    right: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    max-height: 280px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
}
.search-results-dropdown.active {
    display: block;
}
.search-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}
.search-item:last-child {
    border-bottom: none;
}
.search-item:hover, .search-item.highlighted {
    background-color: var(--bg-input);
    color: var(--primary-ie);
}
body.country-gb .search-item:hover, body.country-gb .search-item.highlighted {
    color: var(--primary-gb);
}
.search-item-title {
    font-weight: 600;
    margin-bottom: 0.1rem;
}
.search-item-url {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.search-empty {
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* Visual Breadcrumbs Trail */
.breadcrumbs {
    background-color: var(--bg-input);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    font-size: 0.8rem;
}
.breadcrumbs .container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}
.breadcrumbs a:hover {
    color: var(--primary-ie);
}
body.country-gb .breadcrumbs a:hover {
    color: var(--primary-gb);
}
.breadcrumbs .separator {
    color: var(--border-color);
    font-weight: 600;
    user-select: none;
}
.breadcrumbs .current {
    color: var(--text-main);
    font-weight: 600;
}

@media (max-width: 768px) {
    .app-header {
        padding: 0.65rem 0 !important;
    }
    .header-container {
        position: relative;
    }
    .header-main-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
    }
    .logo {
        font-size: 1.35rem;
    }
    .logo-svg {
        width: 1.5rem;
        height: 1.5rem;
    }
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        background: none;
        border: none;
        color: var(--text-main);
        cursor: pointer;
        padding: 0.4rem;
        border-radius: 0.5rem;
        transition: background-color 0.2s ease;
    }
    .menu-toggle:hover {
        background-color: var(--bg-input);
    }
    .menu-toggle svg {
        width: 1.5rem;
        height: 1.5rem;
    }
    .menu-toggle.active svg {
        color: var(--primary-ie);
    }
    body.country-gb .menu-toggle.active svg {
        color: var(--primary-gb);
    }
    .app-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0.35rem;
        padding: 0.75rem 0;
        border-top: 1px solid var(--border-color);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-card);
        z-index: 99;
        box-shadow: var(--shadow-lg);
    }
    .app-nav.open {
        display: flex;
    }
    .header-search {
        max-width: none;
        width: calc(100% - 2rem);
        margin: 0.25rem 1rem 0.5rem 1rem;
        padding: 0.25rem 0.5rem 0.25rem 1rem;
    }
    #site-search-input {
        font-size: 0.85rem;
    }
    #site-search-btn {
        padding: 0.35rem;
    }
    #site-search-btn svg {
        width: 1rem;
        height: 1rem;
    }
    .nav-link {
        display: block;
        width: calc(100% - 2rem);
        margin: 0 1rem;
        padding: 0.65rem 1rem;
        text-align: left;
        font-size: 0.85rem;
    }
    .calculator-hero {
        padding: 1.5rem 1rem;
    }
    .calculator-container {
        grid-template-columns: 1fr !important;
    }
    .hero-text h1 {
        font-size: 2rem;
    }
    .calculator-card, .results-card, .card {
        padding: 1.25rem !important;
    }
}