/* =============================================================================
   article14.css - PRELIMINARY PT SLAB THICKNESS CALCULATOR
   Article : What Is the Maximum Recommended Span for a Residential PT Slab?
   Chemin  : public_html/assets/css/articles/article14.css
   Dashboard, Extra stylesheets : css/articles/article14.css

   Repris de l'ancien article PHP (bloc <style> de l'en-tete), limite au
   calculateur insere par js/articles/article14.js. Chaque regle est
   prefixee par .pt-calculator : les noms generiques de l'ancien style
   (.calc-btn, .result-value, .status-ok...) ne touchent rien d'autre.
   ============================================================================= */

.pt-calculator {
    background: #f0f6fb;
    border: 1px solid #c5d8e8;
    border-top: 4px solid #2C5370;
    border-radius: 4px;
    padding: 28px 32px;
    margin: 36px 0;
}
.pt-calculator h3 {
    font-family: var(--font-heading,'Merriweather',serif);
    color: #2C5370;
    font-size: 1.1rem;
    margin: 0 0 4px;
}
.pt-calculator .calc-tagline {
    font-size: 0.88rem;
    color: #666;
    margin: 0 0 24px;
    line-height: 1.55;
}
.pt-calculator .calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px 20px;
    margin-bottom: 20px;
    align-items: end;
}
.pt-calculator .calc-field label {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    color: #2C5370;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 7px;
}
.pt-calculator .calc-field input,
.pt-calculator .calc-field select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #b0c8d8;
    border-radius: 3px;
    font-size: 0.95rem;
    font-family: inherit;
    color: #222;
    background: #fff;
    box-sizing: border-box;
    transition: border-color 0.15s;
}
.pt-calculator .calc-field input:focus,
.pt-calculator .calc-field select:focus {
    outline: none;
    border-color: #2C5370;
    box-shadow: 0 0 0 2px rgba(44,83,112,0.12);
}
.pt-calculator .calc-btn {
    width: 100%;
    background: #2C5370;
    color: #fff;
    border: none;
    padding: 11px 20px;
    font-size: 0.92rem;
    font-weight: 700;
    border-radius: 3px;
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
    letter-spacing: 0.03em;
}
.pt-calculator .calc-btn:hover { background: #1e3d52; }
.pt-calculator .calc-results {
    border-top: 1px solid #c5d8e8;
    margin-top: 22px;
    padding-top: 22px;
    display: none;
}
.pt-calculator .calc-results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 14px;
}
.pt-calculator .calc-result-item {
    text-align: center;
    background: #fff;
    border: 1px solid #d5e4ef;
    border-radius: 3px;
    padding: 16px 12px;
}
.pt-calculator .result-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #888;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
}
.pt-calculator .result-value {
    display: block;
    font-size: 1.55rem;
    font-weight: 700;
    color: #2C5370;
    font-family: var(--font-heading,'Merriweather',serif);
    line-height: 1.1;
}
.pt-calculator .result-unit {
    font-size: 0.85rem;
    font-weight: 400;
    color: #888;
    font-family: inherit;
}
.pt-calculator .calc-status-row {
    text-align: center;
    margin-top: 4px;
}
.pt-calculator .result-status {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.4;
}
.pt-calculator .status-ok    { background: #e3f4e9; color: #1e6e38; }
.pt-calculator .status-warn  { background: #fff3e0; color: #b85c2a; }
.pt-calculator .status-alert { background: #fdecea; color: #c0392b; }
.pt-calculator .calc-disclaimer {
    font-size: 0.78rem;
    color: #888;
    line-height: 1.6;
    margin: 16px 0 0;
    font-style: italic;
    border-top: 1px dashed #c5d8e8;
    padding-top: 14px;
}
@media (max-width: 680px) {
    .pt-calculator .calc-grid { grid-template-columns: 1fr 1fr; }
    .pt-calculator .calc-grid .calc-field:last-child { grid-column: 1 / -1; }
    .pt-calculator .calc-results-grid { grid-template-columns: 1fr 1fr; }
    .pt-calculator { padding: 22px 18px; }
}
@media (max-width: 420px) {
    .pt-calculator .calc-grid { grid-template-columns: 1fr; }
    .pt-calculator .calc-results-grid { grid-template-columns: 1fr; }
}

/* --- Ajouts ------------------------------------------------------------- */
.pt-calculator .calc-btn:focus-visible,
.pt-calculator .calc-field input:focus-visible,
.pt-calculator .calc-field select:focus-visible { outline: 2px solid #2C5370; outline-offset: 2px; }
.pt-calculator .calc-field input.is-invalid { border-color: #c0392b; }
.pt-calculator .calc-results.is-visible { display: block; }