/**
 * converter.co.in - Interactive Tool & Calculator Styling
 * Bespoke luxury layout for real-time converters, price-tag serif typography,
 * formula blocks, comparison charts, and schema-marked FAQ cards.
 */

/* Master Tool Container */
.tool-page-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2.5rem 1.5rem 5rem;
}

.tool-header-block {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.tool-h1-title {
    margin: 0.8rem 0 1rem;
}

.tool-short-desc {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    font-weight: 300;
}

/* =========================================================
   HOMEPAGE QUICK CONVERT EXPRESS MULTI-TAB WIDGET
   ========================================================= */
.express-widget-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-luxury);
    max-width: 960px;
    margin: 0 auto 3.5rem;
    overflow: hidden;
}

.express-tabs-nav {
    display: flex;
    overflow-x: auto;
    background: var(--color-base-warm);
    border-bottom: 1px solid var(--color-border-hairline);
    scrollbar-width: none;
}

.express-tabs-nav::-webkit-scrollbar {
    display: none;
}

.express-tab-btn {
    flex: 1;
    min-width: 120px;
    padding: 1.1rem 1.25rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-smooth);
    text-align: center;
    white-space: nowrap;
}

.express-tab-btn:hover {
    color: var(--color-accent);
    background: rgba(241, 101, 33, 0.04);
}

.express-tab-btn.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
    background: var(--color-surface);
}

.express-tab-content {
    padding: 2.5rem 2rem;
}

/* Common Conversions 34 Pills Grid */
.common-conversions-section {
    max-width: var(--max-width);
    margin: 0 auto 4rem;
    padding: 0 1.5rem;
}

.common-conversions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.conversion-pill-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition-smooth);
    text-decoration: none;
}

.conversion-pill-card:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(241, 101, 33, 0.12);
}

/* Luxury Interactive Converter Instrument Card */
.instrument-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-luxury);
    max-width: 960px;
    margin: 0 auto 4rem;
    overflow: hidden;
    position: relative;
}

.instrument-body {
    padding: 2.5rem 2rem;
}

/* Two-Column Grid for Source & Target Units */
.converter-inputs-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1.5rem;
    align-items: center;
    margin-bottom: 2rem;
}

.input-column {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.input-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 600;
    color: var(--color-saddle-brown);
}

.luxury-input {
    width: 100%;
    padding: 0.9rem 1.1rem;
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text-main);
    background: var(--color-base-warm);
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    outline: none;
    transition: var(--transition-smooth);
}

.luxury-input:focus {
    border-color: var(--color-accent);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.luxury-select {
    width: 100%;
    padding: 0.8rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text-main);
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    outline: none;
    transition: var(--transition-smooth);
}

.luxury-select:focus {
    border-color: var(--color-accent);
}

/* Swap Units Button */
.swap-units-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-base);
    border: 1px solid var(--color-border-hairline);
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    margin-top: 1.5rem;
}

.swap-units-btn:hover {
    background: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
    transform: rotate(180deg);
}

/* Luxury Result Display (Fashion Editorial "Price Tag" Styling) */
.instrument-result-banner {
    background: var(--color-base-warm);
    border-top: 1px solid var(--color-border-hairline);
    padding: 2rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.result-numeral-wrap {
    display: flex;
    flex-direction: column;
}

.result-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--color-text-subtle);
    margin-bottom: 0.2rem;
}

.display-numeral-serif {
    font-family: var(--font-serif);
    font-size: clamp(2.4rem, 4.5vw, 3.8rem);
    font-weight: 700;
    color: var(--color-text-main);
    line-height: 1.1;
    letter-spacing: -0.02em;
    word-break: break-all;
}

.display-numeral-serif span.unit-symbol {
    font-family: var(--font-sans);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-left: 0.4rem;
    letter-spacing: 0;
}

.result-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Luxury Buttons */
.btn-hermes {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border: 1px solid var(--color-accent);
    padding: 0.75rem 1.4rem;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-hermes:hover {
    background-color: var(--color-accent-hover);
    color: #FFFFFF;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(241, 101, 33, 0.25);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-main);
    border: 1px solid var(--color-border-hairline);
    padding: 0.75rem 1.4rem;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-outline:hover {
    border-color: var(--color-text-main);
    background: var(--color-surface);
}

/* Common Mistakes Callout Block */
.common-mistakes-card {
    background: #FFF9F5;
    border: 1px solid #F6D6C6;
    border-left: 4px solid var(--color-accent);
    padding: 1.75rem 2rem;
    border-radius: var(--border-radius-sm);
    margin: 3rem 0;
}

.common-mistakes-card h3 {
    margin: 0.3rem 0 0.8rem;
    color: #A03C12;
}

.common-mistakes-card p {
    margin: 0;
    font-size: 0.95rem;
    color: #5C4A42;
    line-height: 1.6;
}

/* Formula Callout Block */
.formula-callout-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    padding: 2rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 3rem;
}

.formula-math-display {
    font-family: 'Times New Roman', serif;
    font-size: 1.4rem;
    font-style: italic;
    color: var(--color-text-main);
    background: var(--color-base);
    padding: 1.2rem 1.5rem;
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--color-accent);
    margin: 1rem 0 1.25rem;
    overflow-x: auto;
}

/* Step-by-Step Worked Numerical Problem */
.worked-example-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    padding: 2rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 3rem;
}

.steps-list {
    list-style: none;
    margin: 1.25rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.steps-list li {
    padding-left: 1.8rem;
    position: relative;
    font-size: 0.95rem;
}

.steps-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* High-Density Editorial Comparison Tables */
.table-responsive {
    overflow-x: auto;
    margin: 1.5rem 0 3rem;
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    background: var(--color-surface);
}

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

.editorial-table th {
    background-color: var(--color-base);
    color: var(--color-text-main);
    font-family: var(--font-sans);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    padding: 1rem 1.2rem;
    border-bottom: 1px solid var(--color-border-hairline);
}

.editorial-table td {
    padding: 0.9rem 1.2rem;
    border-bottom: 1px solid var(--color-border-hairline);
    color: var(--color-text-muted);
}

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

.editorial-table tr:hover td {
    background-color: var(--color-base-warm);
    color: var(--color-text-main);
}

/* Schema-Marked 15 FAQ Accordion Cards */
.faq-section-block {
    margin: 4rem 0;
}

.faq-accordion-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.faq-item-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
}

.faq-question-btn {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: transparent;
    border: none;
    text-align: left;
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.faq-toggle-icon {
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--color-saddle-brown);
    transition: var(--transition-smooth);
}

.faq-answer-body {
    padding: 0 1.5rem 1.25rem;
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    display: none;
}

.faq-item-card.open .faq-answer-body {
    display: block;
    animation: fadeIn 0.2s ease;
}

.faq-item-card.open .faq-toggle-icon {
    transform: rotate(45deg);
    color: var(--color-accent);
}

/* E-E-A-T Editorial Verification Footer */
.eeat-badge-strip {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    padding: 1.25rem 1.5rem;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 2rem;
}

/* Image Compressor & Canvas Tools */
.drag-drop-zone {
    border: 2px dashed var(--color-border-hairline);
    background: var(--color-base-warm);
    border-radius: var(--border-radius-sm);
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    margin-bottom: 1.5rem;
}

.drag-drop-zone:hover, .drag-drop-zone.dragover {
    border-color: var(--color-accent);
    background: var(--color-accent-soft);
}

.image-preview-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.image-preview-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-hairline);
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    text-align: center;
}

.image-preview-card img {
    max-width: 100%;
    height: 140px;
    object-fit: cover;
    border-radius: 2px;
}

/* QR Code Display Canvas */
.qr-render-frame {
    background: #FFFFFF;
    padding: 1.5rem;
    display: inline-block;
    border: 1px solid var(--color-border-hairline);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 4px 15px rgba(0,0,0,0.04);
}

/* Range Slider */
.luxury-slider {
    width: 100%;
    accent-color: var(--color-accent);
    margin: 0.75rem 0;
    cursor: pointer;
}

/* Responsive Form Grids for Calculators */
.calc-form-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.calc-form-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.calc-form-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.calc-form-grid-gst {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.calc-form-grid-qr {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* Responsive Tool Layouts */
@media (max-width: 768px) {
    .converter-inputs-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .swap-units-btn {
        margin: 0.5rem auto;
        transform: rotate(90deg);
    }
    .instrument-result-banner {
        padding: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
    }
    .calc-form-grid-2,
    .calc-form-grid-3,
    .calc-form-grid-4,
    .calc-form-grid-gst,
    .calc-form-grid-qr {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .instrument-body {
        padding: 1.5rem 1.25rem;
    }
    .express-tab-content {
        padding: 1.5rem 1.25rem;
    }
    .tool-page-container {
        padding: 1.5rem 1rem 3.5rem;
    }
    .common-conversions-grid {
        grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
        gap: 0.5rem;
    }
    .conversion-pill-card {
        padding: 0.65rem 0.75rem;
        font-size: 0.78rem;
    }
    .formula-math-display {
        font-size: 1.15rem;
        padding: 0.9rem 1rem;
    }
    .faq-question-btn {
        font-size: 1rem;
        padding: 1rem 1.25rem;
    }
}