/**
 * Welding Calculators - Styles
 * v2.0 - Grid layout, improved UX
 */

/* ============================================
   Variables
   ============================================ */
:root {
    --wc-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --wc-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --wc-primary: #2563eb;
    --wc-primary-hover: #1d4ed8;
    --wc-primary-light: rgba(37, 99, 235, 0.1);
    --wc-success: #059669;
    --wc-success-bg: #d1fae5;
    --wc-success-border: #6ee7b7;
    --wc-danger: #dc2626;
    --wc-danger-bg: #fee2e2;
    --wc-danger-border: #fca5a5;
    --wc-warning: #d97706;
    --wc-warning-bg: #fef3c7;
    --wc-gray-50: #f9fafb;
    --wc-gray-100: #f3f4f6;
    --wc-gray-200: #e5e7eb;
    --wc-gray-300: #d1d5db;
    --wc-gray-400: #9ca3af;
    --wc-gray-500: #6b7280;
    --wc-gray-600: #475569;
    --wc-gray-700: #334155;
    --wc-gray-900: #0f172a;
    --wc-radius: 12px;
    --wc-radius-sm: 8px;
    --wc-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --wc-shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --wc-transition: 0.2s ease;
}

/* ============================================
   Calculator Container
   ============================================ */
.wc-calculator {
    max-width: 600px;
    margin: 0.75rem auto;
    padding: 0.9rem 1.1rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
    font-family: var(--wc-font-sans);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    color: var(--wc-gray-900);
    line-height: 1.35;
}

.wc-calculator__title {
    margin: 0 0 0.65rem;
    padding-bottom: 0.5rem;
    border-bottom: 1.5px solid var(--wc-gray-100);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--wc-gray-900);
    letter-spacing: -0.02em;
}

/* ============================================
   Form Grid Layout
   ============================================ */
.wc-form {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}



.wc-form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.55rem;
}

@media (min-width: 640px) {
    .wc-form-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.65rem;
    }
}

.wc-full-width {
    grid-column: 1 / -1;
}

[hidden],
.wc-form-group[hidden] {
    display: none !important;
}

/* ============================================
   Form Elements
   ============================================ */
.wc-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.wc-label-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.wc-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--wc-gray-700);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.35rem;
    letter-spacing: -0.01em;
    line-height: 1.35;
    min-height: 1.15rem;
    margin-bottom: 0.2rem;
}

.wc-label-text {
    flex: 1;
    min-width: 0;
}

.wc-label-hint {
    font-weight: 500;
    color: #64748b;
    font-size: 0.6875rem;
    letter-spacing: normal;
    white-space: nowrap;
    flex-shrink: 0;
}

.wc-label-hint--block {
    display: block;
    width: 100%;
    margin-top: -0.1rem;
    margin-bottom: 0.2rem;
    font-size: 0.6875rem;
    color: #64748b;
    font-weight: 500;
    white-space: normal;
}

.wc-field-error {
    display: block;
    margin-top: 6px;
    color: #b42318;
    font-size: 12px;
    line-height: 1.4;
}

.wc-input,
.wc-select {
    width: 100%;
    padding: 0.38rem 0.6rem;
    font-family: var(--wc-font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    line-height: 1.35;
    color: var(--wc-gray-900);
    background-color: #fff;
    border: 1.5px solid #cbd5e1;
    border-radius: 6px;
    transition: border-color var(--wc-transition), box-shadow var(--wc-transition), background-color var(--wc-transition);
    box-sizing: border-box;
}

.wc-input:hover,
.wc-select:hover {
    border-color: #94a3b8;
}

.wc-input:focus,
.wc-select:focus {
    outline: none;
    border-color: var(--wc-primary);
    box-shadow: 0 0 0 2.5px rgba(37, 99, 235, 0.15);
    background-color: #ffffff;
}

.wc-input::placeholder {
    color: #94a3b8;
    font-size: 0.75rem;
    opacity: 0.9;
}

/* Custom Select Arrow */
.wc-select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    padding-right: 2rem;
    background-color: #fff;
    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='%23475569' 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 8px center;
    background-size: 14px 14px;
    cursor: pointer;
}

/* Firefox fix */
.wc-select::-ms-expand {
    display: none;
}

/* Input Helper Text */
.wc-input-helper {
    font-size: 0.675rem;
    color: #0284c7;
    font-weight: 600;
    margin-top: 0.15rem;
}

/* ============================================
   Button
   ============================================ */
.wc-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    box-shadow: 0 1.5px 5px rgba(37, 99, 235, 0.2);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.wc-button:hover:not(:disabled) {
    background: linear-gradient(135deg, #1d4ed8, #1e40af);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    transform: translateY(-1px);
}

.wc-button:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(37, 99, 235, 0.2);
}

.wc-button:disabled {
    background: #94a3b8;
    box-shadow: none;
    cursor: not-allowed;
}

.wc-button--loading .wc-button__text {
    opacity: 0.7;
}

.wc-button__spinner {
    display: none;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: wc-spin 0.8s linear infinite;
}

.wc-button--loading .wc-button__spinner {
    display: inline-block;
}

@keyframes wc-spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   Results Container
   ============================================ */
.wc-result {
    margin-top: 1.5rem;
}

.wc-result-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--wc-gray-50);
    border: 2px dashed var(--wc-gray-200);
    border-radius: var(--wc-radius);
    text-align: center;
}

.wc-result-placeholder__icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.wc-result-placeholder__text {
    font-size: 0.8125rem;
    color: var(--wc-gray-500);
}

.wc-result--active .wc-result-placeholder {
    display: none;
}

/* ============================================
   Result Card
   ============================================ */
.wc-result-card {
    border-radius: var(--wc-radius);
    overflow: hidden;
    border: 2px solid var(--wc-gray-200);
    background: #fff;
    animation: wc-fadeIn 0.3s ease;
}

@keyframes wc-fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.wc-result--safe .wc-result-card,
.wc-result-card.wc-result--safe {
    border-color: var(--wc-success-border);
}

.wc-result--danger .wc-result-card,
.wc-result-card.wc-result--danger {
    border-color: var(--wc-danger-border);
}

/* Result Header */
.wc-result-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--wc-gray-100);
}

.wc-result--safe .wc-result-header {
    background: #f0fdf4;
    border-bottom-color: #bbf7d0;
}

.wc-result--danger .wc-result-header,
.wc-result-card.wc-result--danger .wc-result-header {
    background: #fef2f2;
    border-bottom-color: #fecaca;
}

.wc-result-header__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.wc-result-status {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.wc-result-status__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 50%;
    color: #fff;
    flex-shrink: 0;
}

.wc-result--safe .wc-result-status__icon {
    background: #10b981;
    box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}

.wc-result--danger .wc-result-status__icon,
.wc-result-card.wc-result--danger .wc-result-status__icon {
    background: #ef4444;
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.3);
}

.wc-result-status__text {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.wc-result--safe .wc-result-status__text {
    color: #065f46;
}

.wc-result--danger .wc-result-status__text,
.wc-result-card.wc-result--danger .wc-result-status__text {
    color: #991b1b;
}

.wc-result-utilization {
    font-size: 0.75rem;
    font-weight: 600;
    color: #334155;
}

/* Utilization Bar */
.wc-util-bar {
    width: 100%;
    height: 5px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 9999px;
    overflow: hidden;
    margin-top: 0.4rem;
}

.wc-util-bar__fill {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.wc-result--safe .wc-util-bar__fill {
    background: linear-gradient(90deg, #10b981, #059669);
}

.wc-result--danger .wc-util-bar__fill {
    background: linear-gradient(90deg, #ef4444, #dc2626);
}

/* Result Body */
.wc-result-body {
    padding: 0.65rem 0.85rem;
}

.wc-result-error {
    margin: 0;
    color: var(--wc-danger);
    font-weight: 500;
}

.wc-result-error-list {
    margin: 0.75rem 0 0;
    padding-left: 1.5rem;
    color: var(--wc-danger);
}

/* ============================================
   Result Metrics Grid & Premium Cards
   ============================================ */
.wc-result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.45rem;
    margin: 0.55rem 0;
}

.wc-result-metric {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0.45rem 0.65rem;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.wc-result-metric:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px -2px rgba(0, 0, 0, 0.05);
    border-color: #cbd5e1;
}

.wc-result-metric__top {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.25rem;
}

.wc-result-metric__icon-box {
    width: 22px;
    height: 22px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
}

.wc-icon-shield { background: #ecfdf5; border-color: #a7f3d0; }
.wc-icon-bolt   { background: #eff6ff; border-color: #bfdbfe; }
.wc-icon-ruler  { background: #fefce8; border-color: #fef08a; }
.wc-icon-weight { background: #f5f3ff; border-color: #ddd6fe; }
.wc-icon-stack  { background: #eef2ff; border-color: #c7d2fe; }
.wc-icon-box    { background: #fff7ed; border-color: #fed7aa; }
.wc-icon-wind   { background: #ecfeff; border-color: #a5f3fc; }
.wc-icon-clock  { background: #fff1f2; border-color: #fecdd3; }
.wc-icon-circle { background: #f0fdf4; border-color: #bbf7d0; }
.wc-icon-layers { background: #f8fafc; border-color: #e2e8f0; }

.wc-result-metric__emoji {
    line-height: 1;
}

.wc-result-metric__label-group {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    flex: 1;
    min-width: 0;
}

.wc-result-metric__label {
    font-size: 0.7rem;
    font-weight: 600;
    color: #475569;
    letter-spacing: 0.01em;
    line-height: 1.2;
}

.wc-result-metric__bottom {
    display: flex;
    align-items: baseline;
    gap: 0.15rem;
    flex-wrap: wrap;
}

.wc-result-metric__value {
    font-size: 1.05rem;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.15;
    letter-spacing: -0.02em;
    font-feature-settings: "tnum";
    font-variant-numeric: tabular-nums;
}

.wc-result-metric__value small {
    font-size: 0.7rem;
    font-weight: 600;
    color: #64748b;
    margin-left: 0.15rem;
}

.wc-result-metric__value em {
    display: inline-block;
    font-size: 0.65rem;
    font-style: normal;
    font-weight: 600;
    color: #0369a1;
    background: #e0f2fe;
    padding: 0.08rem 0.25rem;
    border-radius: 3px;
    margin-left: 0.2rem;
}

.wc-result-metric__value em.wc-badge--prohibited {
    color: #991b1b;
    background: #fee2e2;
    border: 1px solid #fca5a5;
}

/* ============================================
   Result Details Table
   ============================================ */
.wc-result-details {
    margin-top: 0.55rem;
    border-top: 1px solid #e2e8f0;
    padding-top: 0.55rem;
}

.wc-result-details__title {
    font-size: 0.75rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 0.35rem;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.wc-result-table {
    width: 100%;
    font-size: 0.75rem;
    border-collapse: collapse;
    line-height: 1.35;
}

.wc-result-table tr {
    transition: background-color 0.15s ease;
}

.wc-result-table tr:hover td {
    background-color: #f8fafc;
}

.wc-result-table td {
    padding: 0.25rem 0.3rem;
    border-bottom: 1px solid #f1f5f9;
}

.wc-result-table td:first-child {
    color: #334155;
    font-weight: 500;
}

.wc-result-table td:last-child {
    text-align: right;
    font-weight: 700;
    color: #0f172a;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
    letter-spacing: -0.01em;
}

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

/* ============================================
   Warnings & Engineering Notes
   ============================================ */
.wc-result-warnings {
    margin-top: 0.55rem;
    padding: 0.55rem 0.75rem;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-left: 3.5px solid #f59e0b;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(245, 158, 11, 0.04);
}

.wc-result-warnings__header {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.25rem;
}

.wc-result-warnings__icon {
    font-size: 0.9rem;
    line-height: 1;
    flex-shrink: 0;
}

.wc-result-warnings__title {
    font-size: 0.75rem;
    font-weight: 700;
    color: #92400e;
    letter-spacing: -0.01em;
}

.wc-result-warnings__list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.wc-result-warnings__list li {
    position: relative;
    padding-left: 0.95rem;
    font-size: 0.75rem;
    line-height: 1.4;
    color: #451a03;
}

.wc-result-warnings__list li::before {
    content: "•";
    position: absolute;
    left: 0.25rem;
    top: 0;
    color: #d97706;
    font-weight: 700;
    font-size: 0.9rem;
    line-height: 1.3;
}

.wc-result-warnings--danger {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-left: 3.5px solid #dc2626;
    box-shadow: 0 1px 2px rgba(220, 38, 38, 0.05);
}

.wc-result-warnings--danger .wc-result-warnings__title {
    color: #991b1b;
}

.wc-result-warnings--danger .wc-result-warnings__list li {
    color: #7f1d1d;
    font-weight: 500;
}

.wc-result-warnings--danger .wc-result-warnings__list li::before {
    color: #dc2626;
}

/* ============================================
   Method Selector Cards (MMA / MIG / TIG)
   ============================================ */
.wc-method-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}

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

.wc-method-card {
    position: relative;
    border: 1.5px solid #cbd5e1;
    border-radius: 8px;
    padding: 0.6rem 0.5rem;
    text-align: center;
    cursor: pointer;
    background: #ffffff;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    user-select: none;
}

.wc-method-card:hover {
    border-color: #94a3b8;
    background: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.wc-method-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.wc-method-card--active,
.wc-method-card:has(input[type="radio"]:checked) {
    border-color: var(--wc-primary) !important;
    background: #eff6ff !important;
    box-shadow: 0 0 0 2.5px rgba(37, 99, 235, 0.18) !important;
}

.wc-method-card__icon {
    font-size: 1.25rem;
    line-height: 1;
    margin-bottom: 0.1rem;
}

.wc-method-card__title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.01em;
}

.wc-method-card--active .wc-method-card__title,
.wc-method-card:has(input[type="radio"]:checked) .wc-method-card__title {
    color: var(--wc-primary);
}

.wc-method-card__desc {
    font-size: 0.65rem;
    font-weight: 500;
    color: #64748b;
    line-height: 1.2;
}

/* ============================================
   Joint Type Tabs (Fillet / Butt)
   ============================================ */
.wc-joint-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}

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

.wc-joint-tab {
    position: relative;
    border: 1.5px solid #cbd5e1;
    border-radius: 8px;
    padding: 0.55rem 0.6rem;
    cursor: pointer;
    background: #ffffff;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.15rem;
    user-select: none;
}

.wc-joint-tab:hover {
    border-color: #94a3b8;
    background: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.wc-joint-tab input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.wc-joint-tab--active,
.wc-joint-tab:has(input[type="radio"]:checked) {
    border-color: var(--wc-primary) !important;
    background: #eff6ff !important;
    box-shadow: 0 0 0 2.5px rgba(37, 99, 235, 0.18) !important;
}

.wc-joint-tab__title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.01em;
}

.wc-joint-tab--active .wc-joint-tab__title,
.wc-joint-tab:has(input[type="radio"]:checked) .wc-joint-tab__title {
    color: var(--wc-primary);
}

.wc-joint-tab__desc {
    font-size: 0.65rem;
    font-weight: 500;
    color: #64748b;
    line-height: 1.2;
}

/* ============================================
   Pipe Mode Tabs (Single / Combined)
   ============================================ */
.wc-pipe-mode-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}

@media (max-width: 480px) {
    .wc-pipe-mode-tabs {
        grid-template-columns: 1fr;
    }
}

.wc-pipe-mode-tab {
    position: relative;
    border: 1.5px solid #cbd5e1;
    border-radius: 8px;
    padding: 0.55rem 0.6rem;
    cursor: pointer;
    background: #ffffff;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.15rem;
    user-select: none;
}

.wc-pipe-mode-tab:hover {
    border-color: #94a3b8;
    background: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.wc-pipe-mode-tab input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.wc-pipe-mode-tab--active,
.wc-pipe-mode-tab:has(input[type="radio"]:checked) {
    border-color: var(--wc-primary) !important;
    background: #eff6ff !important;
    box-shadow: 0 0 0 2.5px rgba(37, 99, 235, 0.18) !important;
}

.wc-pipe-mode-tab__title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.01em;
}

.wc-pipe-mode-tab--active .wc-pipe-mode-tab__title,
.wc-pipe-mode-tab:has(input[type="radio"]:checked) .wc-pipe-mode-tab__title {
    color: var(--wc-primary);
}

.wc-pipe-mode-tab__desc {
    font-size: 0.65rem;
    font-weight: 500;
    color: #64748b;
    line-height: 1.2;
}

.wc-pipe-pass-card {
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    padding: 0.85rem;
    background: #f8fafc;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.wc-pipe-pass-card--root {
    border-color: #fde68a;
    background: #fffdf5;
}

.wc-pipe-pass-card--fill {
    border-color: #bfdbfe;
    background: #f8faff;
}

.wc-pipe-pass-card__header {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8125rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.wc-pipe-pass-card--root .wc-pipe-pass-card__header {
    color: #92400e;
}

.wc-pipe-pass-card--fill .wc-pipe-pass-card__header {
    color: #1e40af;
}

/* ============================================
   Quick Value Chips (Presets for leg and length)
   ============================================ */
.wc-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-top: 0.3rem;
}

.wc-chip {
    font-family: inherit;
    font-size: 0.6875rem;
    font-weight: 600;
    color: #475569;
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 0.15rem 0.45rem;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    line-height: 1.2;
}

.wc-chip:hover {
    background: #e2e8f0;
    color: #0f172a;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.wc-chip:active,
.wc-chip--active {
    background: #e0f2fe;
    color: #0369a1;
    border-color: #bae6fd;
}

/* ============================================
   Materials Hero Specification Card
   ============================================ */
.wc-materials-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border-radius: 9px;
    padding: 0.85rem 1rem;
    color: #ffffff;
    margin-bottom: 0.65rem;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
    border: 1px solid #334155;
}

.wc-materials-hero__top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.35rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.wc-materials-hero__badge {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #38bdf8;
    background: rgba(56, 189, 248, 0.15);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.wc-materials-hero__title {
    font-size: 0.78rem;
    font-weight: 600;
    color: #94a3b8;
}

.wc-materials-hero__main {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.wc-materials-hero__val-wrap {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.wc-materials-hero__val {
    font-size: 1.65rem;
    font-weight: 900;
    color: #38bdf8;
    letter-spacing: -0.03em;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.wc-materials-hero__unit {
    font-size: 0.875rem;
    font-weight: 700;
    color: #cbd5e1;
}

.wc-materials-hero__sub {
    font-size: 0.75rem;
    font-weight: 600;
    color: #94a3b8;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.25rem 0.55rem;
    border-radius: 5px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.wc-materials-hero__details {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    align-items: flex-end;
}

@media (max-width: 600px) {
    .wc-materials-hero__details {
        align-items: flex-start;
        width: 100%;
        margin-top: 0.5rem;
    }
}

.wc-materials-hero__detail-item {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.75rem;
    color: #cbd5e1;
    background: rgba(255, 255, 255, 0.08);
    padding: 0.2rem 0.55rem;
    border-radius: 5px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.wc-materials-hero__detail-label {
    color: #94a3b8;
    font-weight: 500;
}

.wc-materials-hero__detail-val {
    color: #38bdf8;
    font-weight: 700;
}

/* ============================================
   UX Revamp: Clean Specification Table & KPI Cards
   ============================================ */
.wc-pipe-hero-kpi {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.5rem;
    margin: 0.5rem 0 0.65rem;
}

.wc-pipe-kpi-card {
    background: #f8fafc;
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    padding: 0.6rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    transition: all 0.2s ease;
}

.wc-pipe-kpi-card--primary {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.wc-pipe-kpi-card__label {
    font-size: 0.7rem;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.wc-pipe-kpi-card--primary .wc-pipe-kpi-card__label {
    color: #1e40af;
}

.wc-pipe-kpi-card__value {
    font-size: 1.35rem;
    font-weight: 900;
    color: #0f172a;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}

.wc-pipe-kpi-card--primary .wc-pipe-kpi-card__value {
    color: #1d4ed8;
}

.wc-pipe-kpi-card__value small {
    font-size: 0.8rem;
    font-weight: 700;
    color: #64748b;
    margin-left: 0.15rem;
}

.wc-pipe-kpi-card__sub {
    font-size: 0.6875rem;
    color: #64748b;
    line-height: 1.25;
}

/* Specification Matrix Table */
.wc-spec-table-wrap {
    overflow-x: auto;
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    background: #ffffff;
    margin: 0.65rem 0;
}

.wc-spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78125rem;
    line-height: 1.35;
    text-align: left;
}

.wc-spec-table th {
    background: #f1f5f9;
    padding: 0.5rem 0.65rem;
    font-weight: 700;
    color: #334155;
    border-bottom: 1.5px solid #cbd5e1;
    font-size: 0.75rem;
}

.wc-spec-table td {
    padding: 0.45rem 0.65rem;
    border-bottom: 1px solid #f1f5f9;
    color: #334155;
    vertical-align: middle;
}

.wc-spec-table tbody tr:hover {
    background: #f8fafc;
}

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

.wc-spec-table .wc-spec-col-highlight {
    font-weight: 700;
    color: #0f172a;
    background: rgba(241, 245, 249, 0.4);
}

.wc-spec-tag {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    color: #475569;
    background: #f1f5f9;
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    margin-left: 0.25rem;
}

/* Compact Info Callouts */
.wc-compact-note {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    margin-top: 0.45rem;
    border: 1px solid transparent;
}

.wc-compact-note--success {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #166534;
}

.wc-compact-note--warning {
    background: #fffbeb;
    border-color: #fde68a;
    color: #92400e;
}

.wc-compact-note--info {
    background: #f0f9ff;
    border-color: #bae6fd;
    color: #0369a1;
}

/* Pipe Passes Comparison Box (Root vs Fill) */
.wc-pipe-passes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0.65rem;
    margin: 0.65rem 0;
}

.wc-pipe-pass-box {
    border-radius: 8px;
    padding: 0.75rem;
    border: 1.5px solid #e2e8f0;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.wc-pipe-pass-box--root {
    border-color: #fde68a;
    background: #fffdf7;
}

.wc-pipe-pass-box--fill {
    border-color: #fed7aa;
    background: #fffaf5;
}

.wc-pipe-pass-box__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 0.5rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.wc-pipe-pass-box__badge {
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.1rem 0.45rem;
    border-radius: 4px;
}

.wc-pipe-pass-box--root .wc-pipe-pass-box__badge {
    background: #fef08a;
    color: #854d0e;
}

.wc-pipe-pass-box--fill .wc-pipe-pass-box__badge {
    background: #ffedd5;
    color: #9a3412;
}

.wc-pipe-pass-box__list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.75rem;
}

.wc-pipe-pass-box__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #475569;
}

.wc-pipe-pass-box__row strong {
    color: #0f172a;
    font-weight: 700;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 480px) {
    .wc-calculator {
        margin: 1rem;
        padding: 1rem;
    }

    .wc-result-grid {
        grid-template-columns: 1fr;
    }

    .wc-result-metric {
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;
    }

    .wc-result-metric__icon {
        order: -1;
        margin-bottom: 0;
    }

    .wc-result-metric__label {
        flex: 1;
    }

    .wc-result-metric__value {
        text-align: right;
    }
}

/* ============================================
   Tooltips - Fixed Toast (All Devices)
   ============================================ */

.wc-info-icon {
    border: 0;
    padding: 0;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    margin-left: 4px;
    border-radius: 50%;
    background-color: #e0e0e0;
    color: #666;
    font-size: 10px;
    font-weight: bold;
    cursor: help;
    position: relative;
    vertical-align: middle;
    transition: all 0.2s;
    line-height: 1;
    flex-shrink: 0;
}

.wc-info-icon:hover,
.wc-info-icon:focus {
    background-color: #007cba;
    color: #fff;
    outline: none;
}

/* Tooltip Body - Fixed Position Toast */
.wc-info-icon::after {
    content: attr(data-tooltip);
    position: fixed;
    bottom: 16px;
    left: 16px;
    right: 16px;
    width: auto;
    max-width: none;
    padding: 12px 16px;
    background-color: rgba(30, 30, 30, 0.95);
    color: #fff;
    font-size: 13px;
    line-height: 1.5;
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
    z-index: 999999;
    white-space: normal;
    text-align: left;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    font-weight: normal;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* No arrow needed for toast */
.wc-info-icon::before {
    display: none;
}

/* Show State */
.wc-info-icon:hover::after,
.wc-info-icon:focus::after {
    opacity: 1;
    visibility: visible;
}

/* Desktop: limit width for readability */
@media (min-width: 768px) {
    .wc-info-icon::after {
        left: auto;
        right: 16px;
        max-width: 400px;
    }
}

/* Combined Welding - responsive two columns */
.wc-combined-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 540px) {
    .wc-combined-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Ultimate Pro Mode Switcher & Header
   ============================================ */

.wc-calculator__header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.wc-mode-toggle {
    display: inline-flex;
    background: #f1f5f9;
    padding: 0.25rem;
    border-radius: 9999px;
    border: 1px solid #cbd5e1;
}

.wc-mode-btn {
    border: none;
    background: transparent;
    padding: 0.4rem 0.9rem;
    font-size: 0.825rem;
    font-weight: 600;
    color: #64748b;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.wc-mode-btn:not(.wc-mode-btn--active) {
    background: #e2e8f0;
    color: #334155 !important;
}

.wc-mode-btn:hover {
    color: #1e293b;
}

.wc-mode-btn--active {
    background: #0ea5e9;
    color: #ffffff !important;
    box-shadow: 0 2px 6px rgba(14, 165, 233, 0.35);
}

/* Keep the mode switch readable when a theme adds global button styles. */
.wc-calculator .wc-mode-toggle .wc-mode-btn:not(.wc-mode-btn--active) {
    background-color: #e2e8f0 !important;
    color: #334155 !important;
    -webkit-text-fill-color: #334155 !important;
    opacity: 1 !important;
}

.wc-calculator .wc-mode-toggle .wc-mode-btn.wc-mode-btn--active {
    background-color: #0ea5e9 !important;
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff !important;
    opacity: 1 !important;
}

/* ============================================
   PRO Engineering Panel
   ============================================ */

.wc-pro-panel {
    background: linear-gradient(145deg, #090d16 0%, #131d2e 100%);
    border: 1px solid #1e293b;
    border-radius: 10px;
    padding: 0.85rem 1rem;
    margin: 0.75rem 0;
    color: #f8fafc;
    box-shadow: 0 8px 20px -4px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.05);
    color-scheme: dark;
}

.wc-pro-panel__header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.65rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.wc-pro-panel__badge {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: #ffffff;
    font-size: 0.65rem;
    font-weight: 800;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.wc-pro-panel__title {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 700;
    color: #f8fafc;
}

.wc-pro-panel .wc-label {
    color: #cbd5e1;
    font-size: 0.75rem;
    min-height: 1.25rem;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.35rem;
    white-space: nowrap;
}

.wc-pro-panel .wc-label-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.wc-pro-panel .wc-label-hint {
    color: #94a3b8;
    font-size: 0.7rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.wc-pro-panel .wc-input {
    background-color: #0d1524 !important;
    border: 1.5px solid #2d3b4f !important;
    color: #f8fafc !important;
    color-scheme: dark;
    padding: 0.45rem 0.65rem;
    font-size: 0.8125rem;
}

.wc-pro-panel .wc-select {
    background-color: #0d1524 !important;
    border: 1.5px solid #2d3b4f !important;
    color: #f8fafc !important;
    color-scheme: dark;
    padding: 0.45rem 0.65rem;
    font-size: 0.8125rem;
    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='%2394a3b8' 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") !important;
    background-repeat: no-repeat !important;
    background-position: right 10px center !important;
    background-size: 14px 14px !important;
}

.wc-pro-panel select option,
.wc-pro-panel .wc-select option {
    background-color: #0d1524 !important;
    color: #f8fafc !important;
}

.wc-pro-panel .wc-input:hover,
.wc-pro-panel .wc-select:hover {
    border-color: #475569 !important;
}

.wc-pro-panel .wc-input:focus,
.wc-pro-panel .wc-select:focus {
    border-color: #38bdf8 !important;
    box-shadow: 0 0 0 2.5px rgba(56, 189, 248, 0.25) !important;
}

/* ============================================
   2D SVG Weld Geometry Visualizer
   ============================================ */

.wc-svg-container {
    background: #090d16;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    border: 1px solid #1e293b;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.wc-svg-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    font-weight: 600;
    color: #94a3b8;
    margin-bottom: 0.5rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.wc-svg-badge {
    background: rgba(255, 255, 255, 0.08);
    color: #cbd5e1;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.6875rem;
    font-weight: 600;
}

.wc-weld-svg {
    width: 100%;
    height: auto;
    min-height: 165px;
    max-height: 220px;
    display: block;
    border-radius: 6px;
}

/* Print Stamp (Hidden on Screen, Active only in Print / PDF) */
.wc-print-sheet,
.wc-print-stamp {
    display: none !important;
}

/* ============================================
   Thermal & Preheat Card (CEV)
   ============================================ */

.wc-thermal-card {
    border-radius: 8px;
    padding: 0.55rem 0.75rem;
    margin: 0.55rem 0;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.wc-thermal-card--ok {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #14532d;
}

.wc-thermal-card--warn {
    background: #fffbeb;
    border-color: #fde68a;
    color: #78350f;
}

.wc-thermal-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.3rem;
    font-weight: 700;
    font-size: 0.8125rem;
    margin-bottom: 0.35rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.wc-thermal-card__title-wrap {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: #0f172a;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.wc-thermal-card__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.35rem;
    font-size: 0.75rem;
    margin-bottom: 0.35rem;
}

.wc-thermal-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.wc-thermal-item__label {
    color: #334155;
    font-weight: 500;
}

.wc-thermal-item__val {
    font-weight: 700;
    color: #0f172a;
    font-variant-numeric: tabular-nums;
}

.wc-thermal-card__advice {
    font-size: 0.75rem;
    line-height: 1.4;
    color: #1e293b;
    background: rgba(255, 255, 255, 0.85);
    padding: 0.4rem 0.6rem;
    border-radius: 5px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    margin-top: 0.25rem;
}

/* ============================================
   Action Toolbar & Badges
   ============================================ */

.wc-result-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.85rem;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.wc-result-toolbar__left {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.wc-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.wc-badge--primary {
    background: #e0f2fe;
    color: #0369a1;
    border: 1px solid #bae6fd;
}

.wc-badge--secondary {
    background: #f1f5f9;
    color: #334155;
    border: 1px solid #cbd5e1;
}

.wc-badge--accent {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.wc-badge--danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.wc-badge--success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.wc-btn-print {
    background: #ffffff;
    border: 1.5px solid #cbd5e1;
    color: #334155;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.wc-btn-print:hover {
    background: #f8fafc;
    border-color: #94a3b8;
    color: #0f172a;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
}

/* ============================================
   Pipe Calculator PRO Tabs & Pass Cards
   ============================================ */

.wc-pipe-mode-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.wc-pipe-mode-tab {
    display: flex;
    flex-direction: column;
    padding: 0.65rem 0.85rem;
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    background: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    position: relative;
}

.wc-pipe-mode-tab input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.wc-pipe-mode-tab:hover {
    border-color: #93c5fd;
    background: #f8fafc;
    transform: translateY(-1px);
}

.wc-pipe-mode-tab--active {
    border-color: #2563eb;
    background: #eff6ff;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.12);
}

.wc-pipe-mode-tab__title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.15rem;
}

.wc-pipe-mode-tab--active .wc-pipe-mode-tab__title {
    color: #1d4ed8;
}

.wc-pipe-mode-tab__desc {
    font-size: 0.6875rem;
    color: #64748b;
    line-height: 1.25;
}

.wc-pipe-pass-card {
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    padding: 0.75rem;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.wc-pipe-pass-card--root {
    border-color: #fde68a;
    background: #fffdf5;
}

.wc-pipe-pass-card--fill {
    border-color: #fed7aa;
    background: #fffaf5;
}

.wc-pipe-pass-card__header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.65rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.wc-pro-card {
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    padding: 0.75rem;
    background: #f8fafc;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.wc-pro-card__title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 0.5rem 0;
}

/* ============================================
   Print Media Stylesheet (@media print)
   ============================================ */

@media print {
    @page {
        size: A4 portrait;
        margin: 10mm 12mm;
    }

    html, body {
        background: #ffffff !important;
        color: #0f172a !important;
        font-family: var(--wc-font-sans) !important;
        font-size: 9pt !important;
        line-height: 1.35 !important;
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Hide non-print UI surroundings */
    #wpadminbar,
    .admin-bar,
    header,
    footer,
    nav,
    aside,
    .sidebar,
    .wc-calculator__title,
    .wc-calculator__header-flex,
    .wc-form,
    .wc-mode-toggle,
    .wc-result-toolbar,
    .wc-btn-print,
    .wc-result-placeholder,
    .wc-result-header,
    .wc-info-icon,
    button,
    input,
    select {
        display: none !important;
    }

    /* Expand containers to full A4 page width */
    .wc-calculator,
    .wc-calculator--geometry-strength,
    .wc-calculator--materials-consumption,
    .wc-calculator--pipe-welding {
        max-width: 100% !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        box-shadow: none !important;
        border: none !important;
        background: transparent !important;
    }

    .wc-result,
    .wc-result-card {
        max-width: 100% !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        box-shadow: none !important;
        border: none !important;
        background: #ffffff !important;
        display: block !important;
        position: static !important;
    }

    /* Print Engineering Stamp Header */
    .wc-print-sheet,
    .wc-print-stamp {
        display: block !important;
        margin-bottom: 4mm !important;
        border: 1.5pt solid #0f172a !important;
        border-radius: 3px !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .wc-print-stamp__header {
        background: #f1f5f9 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
        padding: 3mm 4mm !important;
        text-align: center;
        border-bottom: 1.5pt solid #0f172a !important;
    }

    .wc-print-stamp__title-badge {
        display: inline-block;
        font-size: 7pt !important;
        font-weight: 800 !important;
        letter-spacing: 0.12em !important;
        color: #475569 !important;
        margin-bottom: 1mm !important;
        text-transform: uppercase;
    }

    .wc-print-stamp__header h3 {
        margin: 0 !important;
        font-size: 11.5pt !important;
        font-weight: 800 !important;
        color: #0f172a !important;
        letter-spacing: 0.02em !important;
        text-transform: uppercase;
    }

    .wc-print-stamp__header p {
        margin: 1mm 0 0 !important;
        font-size: 7.5pt !important;
        font-weight: 600 !important;
        color: #475569 !important;
    }

    .wc-print-stamp__grid {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 1.5mm 5mm !important;
        padding: 2.5mm 4mm !important;
        font-size: 8.5pt !important;
    }

    .wc-print-stamp__cell strong {
        color: #334155 !important;
    }

    .wc-print-stamp__verdict {
        grid-column: 1 / -1 !important;
        padding: 2mm 3mm !important;
        margin-top: 1.5mm !important;
        border-top: 1pt dashed #94a3b8 !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        font-size: 9.5pt !important;
        font-weight: 800 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .wc-print-stamp__verdict--safe {
        background: #f0fdf4 !important;
        color: #166534 !important;
    }

    .wc-print-stamp__verdict--danger {
        background: #fef2f2 !important;
        color: #991b1b !important;
    }

    /* Print-Friendly SVG Drawing (Toner-saving Light Theme) */
    .wc-svg-container {
        background: #ffffff !important;
        border: 1pt solid #94a3b8 !important;
        box-shadow: none !important;
        padding: 2.5mm 3.5mm !important;
        margin: 3.5mm 0 !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .wc-svg-header {
        color: #0f172a !important;
        border-bottom: 1pt solid #cbd5e1 !important;
        font-size: 8pt !important;
        font-weight: 700 !important;
        padding-bottom: 1.5mm !important;
        margin-bottom: 2mm !important;
    }

    .wc-svg-badge {
        display: none !important;
    }

    .wc-weld-svg {
        max-height: 52mm !important;
        min-height: 38mm !important;
    }

    .wc-weld-svg rect[fill^="url(#wc-geometry-svg"] {
        fill: #f8fafc !important;
    }

    .wc-weld-svg text {
        fill: #0f172a !important;
        font-weight: 700 !important;
    }

    .wc-weld-svg text[fill="#38bdf8"],
    .wc-weld-svg text[fill="#94a3b8"] {
        fill: #0284c7 !important;
    }

    .wc-weld-svg text[fill="#fbbf24"] {
        fill: #b45309 !important;
    }

    .wc-weld-svg line[stroke="#38bdf8"] {
        stroke: #0284c7 !important;
        stroke-width: 1.5 !important;
    }

    /* Metrics Grid in Print */
    .wc-result-body {
        padding: 0 !important;
    }

    .wc-result-grid {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 2mm !important;
        margin: 3mm 0 !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .wc-result-metric {
        background: #ffffff !important;
        border: 1pt solid #cbd5e1 !important;
        padding: 2mm 2.5mm !important;
        border-radius: 3px !important;
        box-shadow: none !important;
    }

    .wc-result-metric__top {
        gap: 1.5mm !important;
        margin-bottom: 1mm !important;
    }

    .wc-result-metric__icon-box {
        width: 5mm !important;
        height: 5mm !important;
        background: #f1f5f9 !important;
        border: 1pt solid #cbd5e1 !important;
    }

    .wc-result-metric__label {
        font-size: 7.5pt !important;
        color: #334155 !important;
        font-weight: 600 !important;
    }

    .wc-result-metric__value {
        font-size: 11pt !important;
        font-weight: 800 !important;
        color: #0f172a !important;
    }

    /* Thermal & Preheat Card Print */
    .wc-thermal-card {
        border: 1pt solid #cbd5e1 !important;
        background: #f8fafc !important;
        padding: 2mm 3mm !important;
        margin: 3mm 0 !important;
        page-break-inside: avoid;
        break-inside: avoid;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .wc-thermal-card__header {
        font-size: 8pt !important;
        border-bottom: 1pt solid #e2e8f0 !important;
        margin-bottom: 1.5mm !important;
        padding-bottom: 1mm !important;
    }

    .wc-thermal-card__grid {
        font-size: 7.5pt !important;
        margin-bottom: 1.5mm !important;
    }

    .wc-thermal-card__advice {
        font-size: 7.5pt !important;
        background: #ffffff !important;
        border: 1pt solid #e2e8f0 !important;
        padding: 1.5mm 2.5mm !important;
    }

    /* Engineering Parameters Table */
    .wc-result-details {
        margin-top: 3mm !important;
        padding-top: 2mm !important;
        border-top: 1pt solid #cbd5e1 !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .wc-result-details__title {
        font-size: 8.5pt !important;
        font-weight: 700 !important;
        color: #0f172a !important;
        margin-bottom: 1.5mm !important;
    }

    .wc-result-table {
        width: 100% !important;
        font-size: 8pt !important;
        border: 1pt solid #cbd5e1 !important;
        border-collapse: collapse !important;
    }

    .wc-result-table td {
        padding: 1.5mm 2.5mm !important;
        border-bottom: 1pt solid #e2e8f0 !important;
    }

    .wc-result-table td:last-child {
        font-weight: 700 !important;
    }

    /* Engineering Warnings Box */
    .wc-result-warnings {
        background: #fffbeb !important;
        border: 1pt solid #fde68a !important;
        border-left: 3pt solid #d97706 !important;
        padding: 2mm 3mm !important;
        margin: 2.5mm 0 !important;
        page-break-inside: avoid;
        break-inside: avoid;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .wc-result-warnings--danger {
        background: #fef2f2 !important;
        border: 1pt solid #fecaca !important;
        border-left: 3pt solid #dc2626 !important;
    }

    .wc-result-warnings__title {
        font-size: 8pt !important;
        font-weight: 700 !important;
    }

    .wc-result-warnings__list li {
        font-size: 7.5pt !important;
        line-height: 1.35 !important;
    }
}