/* ==================== Calculator Navigation ==================== */
.calculator-nav {
    background-color: var(--bg-secondary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 70px;
    z-index: 90;
    transition: background-color 0.3s ease;
}

.calculator-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-semibold);
    font-size: var(--font-sm);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.calculator-nav a:hover {
    background-color: var(--bg-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ==================== Ad Containers ==================== */
.ad-container {
    background-color: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: var(--font-sm);
    font-style: italic;
}

.ad-container::before {
    content: 'Ad Placement';
}

.ad-banner {
    min-height: 100px;
    margin: 1rem 0;
}

.ad-in-content {
    min-height: 250px;
    margin: 2rem 0;
}

.ad-sidebar {
    min-height: 600px;
    margin-bottom: 2rem;
}

.ad-sidebar.sticky {
    position: sticky;
    top: 150px;
}

/* ==================== Content Layout ==================== */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.calculators-column {
    min-width: 0; /* Prevents grid blowout */
}

/* Hide sidebar ads on mobile */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar-ads {
        display: none;
    }
}

/* ==================== Calculator Sections ==================== */
.calculator-section {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    scroll-margin-top: 150px; /* Account for sticky header and nav */
    transition: all 0.3s ease;
}

.calculator-section h2 {
    font-size: var(--font-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.calculator-section h2 i {
    color: var(--accent-primary);
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.calculator-content {
    margin-top: var(--spacing-lg);
}

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

.helper-text {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: var(--font-xs);
}

/* ==================== Results Box ==================== */
.results-box {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.results-box h3 {
    font-size: var(--font-lg);
    margin-bottom: var(--spacing-md);
    color: white;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.result-row:last-of-type {
    border-bottom: none;
}

.result-row span {
    font-size: var(--font-sm);
    opacity: 0.9;
}

.result-row strong {
    font-size: var(--font-md);
    font-weight: var(--font-bold);
}

.formula-info {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    opacity: 0.9;
}

/* ==================== Result Highlight ==================== */
.result-highlight {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin: var(--spacing-md) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.big-number {
    font-size: var(--font-2xl);
    font-weight: var(--font-bold);
    color: white;
    line-height: 1.2;
}

.big-label {
    font-size: var(--font-sm);
    margin-top: var(--spacing-sm);
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==================== Export Button ==================== */
.btn-export {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    border-radius: var(--radius-sm);
    font-size: var(--font-base);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.btn-export:hover {
    background-color: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-export:active {
    transform: translateY(0);
}

/* ==================== Two Column Layout ==================== */
.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
}

.column h3 {
    font-size: var(--font-md);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

/* ==================== Comparison Result ==================== */
.comparison-result {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
}

/* ==================== Info Box ==================== */
.info-box {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-primary);
    margin: var(--spacing-lg) 0;
}

.info-box p {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-relaxed);
}

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

/* ==================== Tier Inputs ==================== */
.tier-inputs {
    margin: var(--spacing-md) 0;
}

.tier-row {
    display: grid;
    grid-template-columns: 2fr 1fr auto;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.tier-row label {
    margin-bottom: 0;
}

.tier-row span {
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

@media (max-width: 480px) {
    .tier-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }

    .tier-row label {
        margin-bottom: var(--spacing-xs);
    }
}

/* ==================== Pricing Table ==================== */
.pricing-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

[data-theme="dark"] .pricing-table {
    background-color: var(--bg-primary);
}

.pricing-table thead {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.pricing-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: var(--font-semibold);
    font-size: var(--font-sm);
}

.pricing-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

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

@media (max-width: 768px) {
    .pricing-table {
        font-size: var(--font-sm);
    }

    .pricing-table th,
    .pricing-table td {
        padding: var(--spacing-sm);
    }
}

/* ==================== Comparison Grid ==================== */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-md) 0;
}

.comparison-col {
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
}

.comparison-col h4 {
    font-size: var(--font-md);
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: white;
}

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

/* ==================== Footer ==================== */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-relaxed);
}

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

.footer-content a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-content a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* ==================== Smooth Scrolling ==================== */
html {
    scroll-behavior: smooth;
}

/* ==================== Responsive Adjustments ==================== */
@media (max-width: 768px) {
    .calculator-nav {
        top: 60px;
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }

    .calculator-nav a {
        font-size: var(--font-xs);
        padding: 0.4rem 0.75rem;
    }

    .calculator-section {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }

    .calculator-section h2 {
        font-size: var(--font-lg);
    }

    .big-number {
        font-size: var(--font-xl);
    }

    .ad-in-content {
        min-height: 200px;
    }
}

@media (max-width: 480px) {
    .calculator-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .calculator-nav a {
        text-align: center;
    }

    .calculator-section {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

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

/* ==================== Print Styles ==================== */
@media print {
    header,
    footer,
    .calculator-nav,
    .ad-container,
    .btn-export,
    .sidebar-ads {
        display: none;
    }

    .calculator-section {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}