/* CSS Variables */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-success: #16a34a;
    --color-success-light: #dcfce7;
    --color-warning: #ea580c;
    --color-warning-light: #ffedd5;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-border: #e5e7eb;
    --color-bg: #f9fafb;
    --color-white: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

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

/* Base */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: 100px;
}

/* Header */
.header {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.header .logo {
    max-width: 200px;
    height: auto;
    margin-bottom: var(--spacing-xs);
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

/* Currency Toggle */
.currency-toggle {
    display: flex;
    background: var(--color-border);
    border-radius: var(--radius-lg);
    padding: 3px;
    width: 100%;
}

.currency-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    background: transparent;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    min-height: 44px;
}

.currency-btn.active {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

/* Results Summary */
.results-summary {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-md);
    position: sticky;
    bottom: var(--spacing-md);
    z-index: 100;
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.result-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.result-card.buy {
    background: #f0fdf4;
    border: 2px solid #86efac;
}

.result-card.rent {
    background: #fef2f2;
    border: 2px solid #fca5a5;
}

.result-card.winner {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

.result-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    word-break: break-word;
}

.result-winner {
    flex: 1;
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
}

.result-winner.has-winner {
    background: #f0fdf4;
    color: #166534;
}

/* Share Button */
.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-success);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
    min-height: 44px;
    white-space: nowrap;
}

.share-btn:hover {
    background: #15803d;
}

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

#winnerText {
    font-weight: 600;
    font-size: 0.9rem;
}

#winnerText .saved-amount {
    text-decoration: underline;
    font-weight: 700;
    font-size: 1.3rem;
}

#winnerText .saved-period {
    font-size: 1rem;
}

/* Input Sections */
.input-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.input-section h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

/* Collapsible Sections */
.collapsible .section-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    margin-bottom: 0;
    padding: var(--spacing-sm) 0;
}

.collapsible .section-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.collapsible.open .section-content {
    max-height: 1000px;
}

.toggle-icon {
    width: 20px;
    height: 20px;
    position: relative;
}

.toggle-icon::before,
.toggle-icon::after {
    content: '';
    position: absolute;
    background: var(--color-text-light);
    transition: transform 0.3s ease;
}

.toggle-icon::before {
    width: 12px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.toggle-icon::after {
    width: 2px;
    height: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.collapsible.open .toggle-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

/* Input Groups */
.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.input-wrapper {
    display: flex;
    align-items: center;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0 var(--spacing-md);
    transition: border-color 0.2s ease;
}

.input-wrapper:focus-within {
    border-color: var(--color-primary);
}

.input-wrapper input[type="text"],
.input-wrapper input[type="number"] {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--spacing-md) 0;
    font-size: 1rem;
    color: var(--color-text);
    min-height: 44px;
    outline: none;
}

.currency-symbol {
    color: var(--color-text-light);
    font-weight: 500;
    margin-right: var(--spacing-sm);
}

.input-suffix {
    color: var(--color-text-light);
    font-weight: 500;
    margin-left: var(--spacing-sm);
}

.input-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
}

.toggle-switch input[type="checkbox"] {
    display: none;
}

.toggle-switch label {
    display: flex;
    align-items: center;
    cursor: pointer;
    background: var(--color-border);
    border-radius: var(--radius-lg);
    padding: 3px;
    width: 100px;
    position: relative;
}

.toggle-switch label::before {
    content: '';
    position: absolute;
    width: 48px;
    height: 36px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease;
    transform: translateX(0);
}

.toggle-switch input:checked + label::before {
    transform: translateX(46px);
}

.toggle-switch .toggle-label-yes,
.toggle-switch .toggle-label-no {
    flex: 1;
    text-align: center;
    padding: var(--spacing-sm);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
    position: relative;
    z-index: 1;
    transition: color 0.2s ease;
}

.toggle-switch input:checked + label .toggle-label-yes {
    color: var(--color-success);
}

.toggle-switch input:not(:checked) + label .toggle-label-no {
    color: var(--color-warning);
}

#sellingCostsGroup {
    transition: opacity 0.2s ease;
}

#sellingCostsGroup.hidden {
    opacity: 0.4;
    pointer-events: none;
}

/* Range Input */
.input-wrapper input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    outline: none;
}

.input-wrapper input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
}

.input-wrapper input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.range-value {
    min-width: 60px;
    text-align: right;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.9rem;
}

/* Exchange Rate Field (only visible when DOP selected) */
#exchangeSection {
    display: none;
}

body.currency-dop #exchangeSection {
    display: block;
}

/* Listings Section */
.listings-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.listings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.listings-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.view-all-link {
    font-size: 0.85rem;
    color: var(--color-primary);
    text-decoration: none;
}

.view-all-link:hover {
    text-decoration: underline;
}

.listings-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.listing-tab {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--color-border);
    background: var(--color-white);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.2s ease;
}

.listing-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.listings-container {
    position: relative;
    margin: 0 calc(-1 * var(--spacing-lg));
    padding: 0 var(--spacing-lg);
}

.listings-scroll {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: var(--spacing-sm);
}

.listings-scroll::-webkit-scrollbar {
    display: none;
}

.listing-card {
    flex: 0 0 calc(85% - var(--spacing-md));
    max-width: 260px;
    scroll-snap-align: start;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.listing-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.listing-image {
    width: 100%;
    height: 140px;
    object-fit: cover;
    background: var(--color-border);
}

.listing-info {
    padding: var(--spacing-sm);
}

.listing-price {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.listing-title {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.listing-specs {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.listing-specs span {
    margin-right: var(--spacing-sm);
}

.listings-loading,
.listings-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.listings-source {
    font-size: 0.7rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
}

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

/* Chart Section */
.chart-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.chart-section h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}

/* Detailed Results */
.detailed-results {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.detailed-results h2 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.75rem;
}

.footer p {
    margin-bottom: var(--spacing-sm);
}

.disclaimer {
    font-style: italic;
}

.disclaimer-full {
    text-align: left;
    max-width: 500px;
    margin: 0 auto;
}

.disclaimer-full p {
    margin-bottom: var(--spacing-sm);
}

.disclaimer-full ul {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

.disclaimer-full li {
    margin-bottom: var(--spacing-xs);
}

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

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

/* Yearly Comparison */
.yearly-comparison {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.yearly-comparison h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.year-block {
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.year-block.buy-winning {
    border-color: #86efac;
}

.year-block.rent-winning {
    border-color: #fca5a5;
}

.year-header {
    font-weight: 600;
    font-size: 0.8rem;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.year-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    font-size: 0.7rem;
}

.year-col {
    padding: var(--spacing-xs);
}

.buy-col {
    border-right: 1px solid var(--color-border);
}

.col-title {
    font-weight: 600;
    font-size: 0.7rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
    text-transform: uppercase;
}

.year-item {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
    color: var(--color-text-light);
}

.year-cashflow {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px dashed var(--color-border);
    font-weight: 500;
    font-size: 0.65rem;
    color: var(--color-text);
}

.year-item.equity-item {
    color: var(--color-success);
}

.year-equity {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    font-weight: 500;
    font-size: 0.65rem;
    color: var(--color-success);
}

.year-totals {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.year-total-col {
    padding: var(--spacing-xs);
}

.year-total-col:first-child {
    border-right: 1px solid var(--color-border);
}

.year-subtotal {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
    font-weight: 500;
    font-size: 0.7rem;
    color: var(--color-text);
}

.year-running {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
    font-weight: 600;
    font-size: 0.7rem;
    color: var(--color-text);
}

.yearly-total {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

.yearly-total.buy-winning {
    background-color: #f0fdf4;
    border: 2px solid #86efac;
}

.yearly-total.rent-winning {
    background-color: #fef2f2;
    border: 2px solid #fca5a5;
}

.total-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    font-size: 0.85rem;
}

.winner-row {
    font-weight: 700;
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    border-top: 2px solid var(--color-border);
}

.positive {
    color: var(--color-success);
}

.negative {
    color: var(--color-warning);
}

/* Equity Summary */
.equity-summary {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.equity-summary h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.summary-row.total-equity {
    font-weight: 700;
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    color: var(--color-text);
}

/* Responsive - Tablet and up */
@media (min-width: 768px) {
    .container {
        padding: var(--spacing-xl);
    }

    .header h1 {
        font-size: 2rem;
    }

    .results-summary {
        position: static;
        padding: var(--spacing-lg);
    }

    .result-value {
        font-size: 1.25rem;
    }

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

    .year-columns {
        font-size: 0.8rem;
    }

    .year-col {
        padding: var(--spacing-sm);
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.result-card.winner {
    animation: pulse 0.5s ease;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .results-summary {
        position: static;
        box-shadow: none;
        border: 1px solid #000;
    }

    .collapsible .section-content {
        max-height: none;
    }
}