/* Ratio and proportion calculator (#71) */
.container--ratio-tool{width:min(100% - 1.5rem,76rem)}
.ratio-tool-intro{max-width:60rem}
.ratio-app{display:grid;gap:1rem;margin:1.5rem 0 2rem}
.ratio-mode-switch{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.4rem;padding:.4rem;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface-soft)}
.ratio-mode-button{min-width:0;min-height:50px;padding:.75rem .6rem;border:1px solid transparent;border-radius:calc(var(--radius-lg) - 6px);background:transparent;color:var(--color-muted);font:inherit;font-weight:800;cursor:pointer;overflow-wrap:anywhere}
.ratio-mode-button[aria-pressed="true"]{border-color:rgba(20,107,99,.32);background:var(--color-surface);color:var(--color-primary);box-shadow:var(--shadow-sm)}
.ratio-mode-button:focus-visible,.ratio-examples button:focus-visible,.ratio-item-remove:focus-visible,.ratio-unknown-fieldset label:focus-within{outline:3px solid rgba(20,107,99,.34);outline-offset:2px}
.ratio-workspace{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(20rem,.88fr);gap:1rem;align-items:start}
.ratio-input-panel,.ratio-result-panel{min-width:0;margin:0;padding:clamp(1rem,2.6vw,1.5rem)}
.ratio-panel-heading,.ratio-section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;margin-bottom:1rem}
.ratio-panel-heading h2,.ratio-section-heading h3,.ratio-result-panel h2{margin:0}
.ratio-panel-heading p,.ratio-section-heading p{margin:.2rem 0 0;color:var(--color-muted);font-size:.88rem}
.ratio-section-heading{align-items:end;margin-top:.4rem}
.ratio-items{display:grid;gap:.65rem;min-width:0}
.ratio-item-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:.6rem;min-width:0}
.ratio-item-row label,.ratio-total-field,.ratio-proportion-grid label{display:grid;min-width:0;gap:.35rem;color:var(--color-text);font-weight:750}
.ratio-item-row input,.ratio-total-field input,.ratio-proportion-grid input{box-sizing:border-box;width:100%;max-width:100%;min-width:0;min-height:46px;padding:.68rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text);font:inherit}
.ratio-item-row input:focus,.ratio-total-field input:focus,.ratio-proportion-grid input:focus{border-color:var(--color-primary);outline:3px solid rgba(20,107,99,.18)}
.ratio-proportion-grid input:disabled{background:#edf4f2;color:var(--color-primary);font-weight:900;text-align:center;opacity:1}
.ratio-item-remove{min-height:46px;padding:.55rem .75rem;border:1px solid #d7aca8;border-radius:var(--radius-sm);background:#fff;color:#982f28;font:inherit;font-weight:750;cursor:pointer}
.ratio-item-remove:disabled{cursor:not-allowed;opacity:.45}
.ratio-total-field{margin-bottom:1rem}
.ratio-unknown-fieldset{min-width:0;margin:0 0 1rem;padding:.85rem;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-soft)}
.ratio-unknown-fieldset legend{padding:0 .35rem;font-weight:800}
.ratio-unknown-fieldset>div{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.45rem}
.ratio-unknown-fieldset label{display:flex;min-width:0;min-height:42px;align-items:center;justify-content:center;gap:.35rem;padding:.45rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);font-weight:750;cursor:pointer}
.ratio-unknown-fieldset label:has(input:checked){border-color:var(--color-primary);background:#eaf6f4;color:var(--color-primary)}
.ratio-unknown-fieldset input{accent-color:var(--color-primary)}
.ratio-proportion-grid{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr) auto minmax(0,1fr) auto minmax(0,1fr);align-items:end;gap:.55rem;min-width:0}
.ratio-proportion-grid>span,.ratio-proportion-grid>strong{align-self:end;padding-bottom:.75rem;color:var(--color-primary);font-size:1.25rem;text-align:center}
.ratio-examples{margin-top:1rem}
.ratio-examples h4{margin:0 0 .45rem;color:var(--color-muted);font-size:.85rem}
.ratio-examples>div{display:flex;flex-wrap:wrap;gap:.45rem}
.ratio-examples button{min-height:40px;max-width:100%;padding:.48rem .7rem;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);color:var(--color-primary);font:inherit;font-weight:750;cursor:pointer;overflow-wrap:anywhere}
.ratio-examples button:hover{border-color:var(--color-primary-light);background:var(--color-surface-soft)}
.ratio-error{min-height:1.5em;margin:.65rem 0 0;color:var(--color-danger);font-weight:750}
.ratio-result-panel{position:sticky;top:5.5rem}
.ratio-result-card{display:grid;min-width:0;gap:.65rem;margin-top:1rem;padding:clamp(1.2rem,4vw,2rem);border:1px solid rgba(20,107,99,.25);border-radius:var(--radius-lg);background:linear-gradient(145deg,rgba(20,107,99,.09),rgba(255,255,255,.88));text-align:center}
.ratio-result-card output{display:block;max-width:100%;color:var(--color-primary);font-size:clamp(1.8rem,6vw,3.2rem);font-weight:900;line-height:1.2;overflow-wrap:anywhere;word-break:break-word}
.ratio-result-card p{margin:0;color:var(--color-text);font-weight:750;overflow-wrap:anywhere;word-break:break-word}
.ratio-copy-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem;margin-top:.8rem}
.ratio-copy-actions .button{min-width:0;width:100%}
.ratio-copy-actions .button:disabled{cursor:not-allowed;opacity:.5}
.ratio-method{margin-top:.9rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface-soft)}
.ratio-method summary{padding:.8rem .9rem;font-weight:800;cursor:pointer}
.ratio-method ol{display:grid;gap:.35rem;margin:0;padding:0 .9rem .9rem 2.2rem}
.ratio-method li{overflow-wrap:anywhere;word-break:break-word}
.ratio-status{min-height:1.5em;margin:.7rem 0 0;color:var(--color-primary);font-weight:750}
.ratio-faq{margin-top:1rem}
.ratio-input-panel>[data-ratio-panel][hidden]{display:none}
@media(max-width:860px){.ratio-workspace{grid-template-columns:1fr}.ratio-result-panel{position:static}}
@media(max-width:700px){.ratio-proportion-grid{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}.ratio-proportion-grid>strong{grid-column:1/-1;padding:.15rem}.ratio-unknown-fieldset>div{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:420px){.container--ratio-tool{width:min(100% - 1rem,76rem);max-width:100%}.ratio-mode-switch{grid-template-columns:1fr}.ratio-input-panel,.ratio-result-panel{width:100%;max-width:100%;min-width:0;padding:.85rem}.ratio-panel-heading,.ratio-section-heading{align-items:stretch;flex-direction:column}.ratio-panel-heading .button,.ratio-section-heading .button{width:100%}.ratio-item-row{grid-template-columns:minmax(0,1fr) auto;gap:.4rem}.ratio-item-remove{padding-inline:.55rem}.ratio-copy-actions{grid-template-columns:1fr}.ratio-unknown-fieldset{padding:.7rem}.ratio-proportion-grid{gap:.35rem}.ratio-proportion-grid input{padding:.6rem .45rem}.ratio-result-card{padding:1rem}.ratio-result-card output{font-size:clamp(1.6rem,10vw,2.25rem)}}