/* Rental Tax Formulas Styles
   Consistent with dscrformulas.com design system
   Author: Rental Tax Formulas */

:root {
    --color-primary: #0f3460;
    --color-primary-dark: #0a2342;
    --color-primary-light: #1a5490;
    --color-accent: #16a34a;
    --color-accent-light: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #dc2626;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e5e7eb;
    --color-input-bg: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: 200ms ease;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, Consolas, "Courier New", monospace;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Header */
.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--color-primary-light);
    font-weight: 500;
}

.main-nav {
    display: flex;
    gap: 1.75rem;
    align-items: center;
}

.main-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition);
}

.main-nav a:hover {
    color: var(--color-primary);
}

@media (max-width: 640px) {
    .main-nav {
        display: none;
    }
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: 4rem 0 3.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
}

.hero-subtitle {
    font-size: 1.15rem;
    opacity: 0.92;
    max-width: 720px;
    margin: 0 auto;
    font-weight: 400;
}

@media (max-width: 640px) {
    .hero {
        padding: 2.5rem 0 2rem;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
}

/* Calculator */
.calculator-section {
    padding: 3rem 0;
    background: var(--color-bg-alt);
}

.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    border: 1px solid var(--color-border);
}

@media (max-width: 900px) {
    .calculator-wrapper {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 1.5rem;
    }
}

.calc-inputs h2,
.calc-results h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

/* Input Groups */
.input-group {
    margin-bottom: 1.1rem;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.4rem;
}

.input-group label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    vertical-align: middle;
    accent-color: var(--color-primary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--color-input-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(15, 52, 96, 0.1);
}

.input-wrapper input,
.input-wrapper select {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.7rem 0.85rem;
    font-size: 1rem;
    font-family: var(--font-sans);
    color: var(--color-text);
    font-weight: 500;
    outline: none;
    width: 100%;
    min-width: 0;
}

.input-wrapper input::-webkit-outer-spin-button,
.input-wrapper input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.input-wrapper input[type=number] {
    -moz-appearance: textfield;
}

.select-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' 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 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

.input-prefix,
.input-suffix {
    color: var(--color-text-light);
    font-weight: 500;
    padding: 0 0.85rem;
    font-size: 0.95rem;
    user-select: none;
}

.input-prefix {
    border-right: 1px solid var(--color-border);
}

.input-suffix {
    border-left: 1px solid var(--color-border);
}

.input-helper {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 0.3rem;
    padding-left: 0.2rem;
    line-height: 1.4;
}

/* Results */
.result-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

.result-card.primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: 2rem 1.5rem;
    margin-bottom: 1.25rem;
    border: none;
    box-shadow: var(--shadow-md);
}

.result-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.85;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.result-value-small {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.result-status {
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0.95;
    padding: 0.4rem 0.85rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 999px;
    display: inline-block;
    margin-top: 0.5rem;
}

.result-status.pass {
    background: rgba(34, 197, 94, 0.25);
}

.result-status.warn {
    background: rgba(245, 158, 11, 0.25);
}

.result-status.fail {
    background: rgba(220, 38, 38, 0.25);
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.result-grid .result-card {
    padding: 1rem 0.75rem;
}

.result-grid .result-value-small {
    font-size: 1.2rem;
}

@media (max-width: 480px) {
    .result-grid {
        grid-template-columns: 1fr;
    }
}

.result-details {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    font-size: 0.92rem;
    border-bottom: 1px solid var(--color-border);
}

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

.detail-row span:first-child {
    color: var(--color-text-light);
}

.detail-row span:last-child {
    font-weight: 600;
    color: var(--color-text);
}

.disclaimer-mini {
    font-size: 0.8rem;
    color: var(--color-text-light);
    text-align: center;
    padding: 0.85rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    line-height: 1.5;
}

/* Related Calculators Section (HUB) */
.related-section {
    padding: 4rem 0;
    background: var(--color-bg);
}

.related-section h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    text-align: center;
    letter-spacing: -0.02em;
}

.related-intro {
    text-align: center;
    color: var(--color-text-light);
    max-width: 640px;
    margin: 0 auto 2.5rem;
    font-size: 1.05rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.related-card {
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.related-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.related-card.coming-soon {
    opacity: 0.65;
    cursor: default;
}

.related-card.coming-soon:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-border);
}

.related-card.directory-card {
    background: linear-gradient(135deg, #f0f4f8 0%, #e6edf3 100%);
    border-color: var(--color-primary);
    border-width: 2px;
}

.related-card.directory-card h3 {
    color: var(--color-primary);
}

.related-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.related-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
}

.related-card p {
    font-size: 0.92rem;
    color: var(--color-text-light);
    line-height: 1.5;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.related-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
}

.related-card.coming-soon .related-link {
    color: var(--color-text-light);
    font-style: italic;
}

.related-cta {
    text-align: center;
    padding: 1.5rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    color: var(--color-text-light);
}

.related-cta a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
}

.content-section.alt-bg {
    background: var(--color-bg-alt);
}

.content-section h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.content-section h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin: 1.75rem 0 0.75rem;
}

.content-section p {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.content-section ul,
.content-section ol {
    margin: 1rem 0 1.25rem 1.5rem;
}

.content-section li {
    font-size: 1.02rem;
    line-height: 1.7;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.content-section strong {
    color: var(--color-primary-dark);
    font-weight: 700;
}

.content-section em {
    color: var(--color-primary);
    font-style: italic;
}

@media (max-width: 640px) {
    .content-section {
        padding: 2.5rem 0;
    }
    .content-section h2 {
        font-size: 1.6rem;
    }
    .content-section h3 {
        font-size: 1.2rem;
    }
}

/* Formula Box */
.formula-box {
    background: linear-gradient(135deg, #f0f4f8 0%, #e6edf3 100%);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    margin: 1.25rem 0;
    overflow-x: auto;
}

.formula-box code {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--color-primary-dark);
    font-weight: 600;
    white-space: nowrap;
    display: block;
    margin: 0.25rem 0;
}

/* FAQ */
.faq-item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: box-shadow var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    font-size: 1.1rem;
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--color-primary-dark);
}

.faq-item p {
    font-size: 0.98rem;
    margin-bottom: 0;
}

/* Disclaimer */
.disclaimer {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-warning);
    border-radius: var(--radius-md);
    padding: 2rem;
}

.disclaimer h3 {
    color: var(--color-warning);
    margin-top: 0;
}

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

/* Guides Grid */
.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.guide-card {
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.guide-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.guide-card-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    background: #f0f4f8;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
    align-self: flex-start;
}

.guide-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.guide-card p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.guide-card-meta {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-primary);
}

@media (max-width: 640px) {
    .guides-grid {
        grid-template-columns: 1fr;
    }
}

/* Article Styles */
.article-content {
    padding: 3rem 0 4rem;
}

.breadcrumb {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

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

.article-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.article-meta {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.article-body {
    max-width: 780px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--color-text);
}

.article-body h2 {
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin: 2.5rem 0 1rem;
    letter-spacing: -0.01em;
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin: 2rem 0 0.75rem;
}

.article-body p {
    margin-bottom: 1.25rem;
}

.article-body ul,
.article-body ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.article-body li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.article-lead {
    font-size: 1.15rem;
    color: var(--color-text);
    line-height: 1.7;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    margin-bottom: 2rem;
}

.article-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.98rem;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.article-table th,
.article-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.article-table th {
    background: var(--color-primary);
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

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

.article-table tbody tr:nth-child(even) {
    background: var(--color-bg-alt);
}

.article-disclaimer {
    margin-top: 3rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-warning);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.article-footer-nav {
    margin-top: 3rem;
    padding: 1.5rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
}

.article-footer-nav p {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary-dark);
}

.article-footer-nav ul {
    margin: 0;
    padding-left: 1.5rem;
}

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

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

@media (max-width: 640px) {
    .article-header h1 {
        font-size: 1.85rem;
    }
    .article-body {
        font-size: 1rem;
    }
    .article-body h2 {
        font-size: 1.4rem;
    }
    .article-table {
        font-size: 0.88rem;
    }
    .article-table th,
    .article-table td {
        padding: 0.5rem 0.65rem;
    }
}

/* Footer */
.site-footer {
    background: var(--color-primary-dark);
    color: white;
    padding: 2.5rem 0 2rem;
}

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

.site-footer p {
    margin: 0;
    opacity: 0.85;
    font-size: 0.9rem;
}

.footer-nav {
    display: flex;
    gap: 1.5rem;
}

.footer-nav a {
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    opacity: 0.85;
    transition: opacity var(--transition);
}

.footer-nav a:hover {
    opacity: 1;
}

@media (max-width: 640px) {
    .site-footer .container {
        flex-direction: column;
        text-align: center;
    }
}