/* ═══════════════════════════════════════════════
   Margin Calculator – CSS (GST style)
   FairCalculator.com
═══════════════════════════════════════════════ */

/* Widget container — matches gst-widget-container width */
.margin-widget-container {
    max-width: 900px;
    margin: 0 auto 40px;
}

/* ── Mode Tabs ───────────────────────────────── */
.mc-tabs {
    display: flex;
    gap: 0;
    background: #f1f5f9;
    border-radius: 10px 10px 0 0;
    border: 1px solid #e2e8f0;
    border-bottom: none;
    overflow: hidden;
    margin-bottom: 0;
}

.mc-tab {
    flex: 1;
    padding: 13px 16px;
    border: none;
    background: transparent;
    font-size: 0.9rem;
    font-weight: 600;
    color: #64748b;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    transition: all 0.2s;
    border-right: 1px solid #e2e8f0;
}

.mc-tab:last-child {
    border-right: none;
}

.mc-tab.active {
    background: #fff;
    color: #2563eb;
    border-bottom: 3px solid #2563eb;
}

.mc-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.7);
    color: #1e40af;
}

/* ── Quick Presets ───────────────────────────── */
.mc-presets {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 40px;
}

.mc-preset-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #64748b;
}

.mc-preset-btn {
    padding: 6px 14px;
    border: 1.5px solid #c7d2fe;
    border-radius: 20px;
    background: #f8fafc;
    font-size: 0.83rem;
    font-weight: 600;
    color: #374151;
    cursor: pointer;
    transition: all 0.18s;
}

.mc-preset-btn:hover {
    border-color: #2563eb;
    background: #eff6ff;
    color: #2563eb;
}

/* ── Error ───────────────────────────────────── */
.mc-error {
    color: #dc2626;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 8px;
    min-height: 20px;
}

/* ── Breakdown Cards (after calculate) ───────── */
.mc-breakdown-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 14px 16px;
    text-align: center;
}

.mc-breakdown-label {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #64748b;
    margin-bottom: 5px;
}

.mc-breakdown-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: #1e293b;
}

.mc-breakdown-card.mc-highlight .mc-breakdown-value {
    color: #2563eb;
}

.mc-breakdown-card.mc-green .mc-breakdown-value {
    color: #16a34a;
}

.mc-breakdown-card.mc-purple .mc-breakdown-value {
    color: #7c3aed;
}

/* ── Comparison Table ────────────────────────── */
.mc-comparison {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 20px 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.mc-comp-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.mc-comp-table thead tr {
    background: #f8fafc;
    border-bottom: 2px solid #e2e8f0;
}

.mc-comp-table th {
    padding: 11px 14px;
    text-align: left;
    font-weight: 700;
    color: #1e293b;
}

.mc-comp-table td {
    padding: 10px 14px;
    border-bottom: 1px solid #f1f5f9;
    color: #475569;
}

.mc-comp-table tr:hover td {
    background: #f8fafc;
}

.mc-comp-table .mc-highlight-row td {
    background: #eff6ff !important;
    color: #1e293b;
    font-weight: 700;
}

.mc-comp-table .mc-pos {
    color: #16a34a;
    font-weight: 700;
}

.mc-comp-table .mc-neg {
    color: #dc2626;
    font-weight: 700;
}

/* ── GST-style rate table (for SEO section) ─── */
.gst-rate-table-container {
    overflow-x: auto;
    margin: 20px 0;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    background: #fff;
}

.gst-rate-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.gst-rate-table th {
    background-color: #f8fafc;
    color: #1e293b;
    font-weight: 700;
    text-align: left;
    padding: 12px 15px;
    border-bottom: 2px solid #e2e8f0;
}

.gst-rate-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #f1f5f9;
    color: #475569;
    vertical-align: top;
}

.gst-rate-table tr:hover {
    background-color: #f8fafc;
}

/* ── Responsive – Tablet (≤768px) ───────────── */
@media (max-width: 768px) {

    /* Formula cards: 2-col → 1-col on tablet */
    .mc-formula-grid {
        grid-template-columns: 1fr !important;
    }

    /* Pro Tip two-formula row: stack on tablet */
    .mc-protip-grid {
        grid-template-columns: 1fr !important;
    }

    /* Comparison table: allow horizontal scroll */
    .mc-comparison {
        padding: 14px 12px;
    }
}

/* ── Responsive – Mobile (≤640px) ───────────── */
@media (max-width: 640px) {

    /* Mode tabs: stack vertically */
    .mc-tabs {
        flex-direction: column;
        border-radius: 10px;
    }

    .mc-tab {
        border-right: none;
        border-bottom: 1px solid #e2e8f0;
    }

    .mc-tab:last-child {
        border-bottom: none;
    }

    .mc-tab.active {
        border-bottom: none;
        border-left: 3px solid #2563eb;
    }

    /* H1: scale down on small screens */
    .mc-hero-title {
        font-size: 1.75rem !important;
    }

    /* Calculator form: reduce padding on mobile */
    .calculator-form {
        padding: 1.25rem !important;
    }

    /* Stack 3-column grid to single column */
    .calculator-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
        margin-bottom: 20px !important;
    }

    /* Equation row: wrap + center + shrink symbols */
    .equation-container {
        flex-wrap: wrap !important;
        justify-content: center !important;
        gap: 6px !important;
    }

    .equation-item {
        min-width: 70px;
    }

    .equation-symbol {
        font-size: 1rem !important;
        padding: 0 4px;
    }

    /* Breakdown cards: 2-col (or full-width when JS sets maxWidth) */
    #breakdownGrid {
        grid-template-columns: 1fr 1fr !important;
        max-width: 100% !important;
        /* override JS 33% on mobile */
        margin: 0 !important;
    }

    /* Presets: smaller chips */
    .mc-preset-btn {
        padding: 5px 10px;
        font-size: 0.8rem;
    }

    /* Key Formulas section: reduce padding */
    .mc-formula-section {
        padding: 18px 16px !important;
    }

    /* Formula cards & Pro Tip: 1 column */
    .mc-formula-grid,
    .mc-protip-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ── Focus States (Accessibility) ───────────── */
.input-field:focus,
.mc-tab:focus,
.mc-preset-btn:focus,
.calc-action-btn:focus {
    outline: 3px solid #2563eb;
    outline-offset: 2px;
}

/* ── Print Styles ────────────────────────────── */
@media print {

    .mc-tabs,
    .mc-presets,
    .calc-action-btn,
    .header,
    .category-bar,
    .mobile-menu,
    .footer {
        display: none !important;
    }

    .mc-breakdown-card,
    .mc-comp-table tr {
        break-inside: avoid;
    }

    .margin-widget-container {
        max-width: 100%;
    }
}