:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--background:#fff;--foreground:#111;--border:#d9d9d9;--border-strong:#111;--muted:#6b6b6b;--surface:#fafafa;--surface-strong:#f0f0f0;--pressed:#e7e7e7;--error:#b42318}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--background);color:var(--foreground);margin:0;font-family:SF Pro Display,Helvetica Neue,Helvetica,Arial,sans-serif}button,input,select{font:inherit;touch-action:manipulation}button{cursor:pointer;-webkit-user-select:none;user-select:none}.page-shell{min-height:100vh;padding:24px 16px 32px}.page-content{width:min(100%,460px);margin:0 auto}.page-header{margin-bottom:24px}.page-header h1{letter-spacing:-.06em;max-width:10ch;margin:0;font-size:clamp(2rem,7vw,3.15rem);line-height:.98}.eyebrow,.section-label,.field-label,.output-unit{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-size:.75rem}.eyebrow,.section-label{margin:0 0 8px}.converter-stack,.tabbed-converters{gap:16px;display:grid}.tabs-shell{justify-content:center;padding:8px 0;display:flex}.tabs-control{border:1px solid var(--border);background:#fff;border-radius:18px;grid-template-columns:repeat(2,minmax(0,1fr));width:min(100%,320px);padding:4px;display:grid;box-shadow:0 8px 24px #0000000f}.tab-button{min-height:48px;color:var(--muted);-webkit-tap-highlight-color:transparent;background:0 0;border:0;border-radius:14px;transition:background-color .16s,color .16s,transform .16s}.tab-button.active{background:var(--foreground);color:#fff}.tab-button:active{transform:scale(.98)}.tab-panel{animation:.18s both tab-panel-in}.tab-panel[hidden]{display:none}@keyframes tab-panel-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.converter-card{border:1px solid var(--border);background:var(--surface);border-radius:24px;padding:24px}.section-heading{margin-bottom:16px}.section-heading h2{letter-spacing:-.04em;margin:0;font-size:1.35rem}.conversion-grid{grid-template-columns:minmax(0,1fr);align-items:stretch;gap:10px;display:grid}.field-block{gap:8px;display:grid}.converter-input,.converter-output,.workout-input,.workout-select,.workout-summary{border:1px solid var(--border);background:#fff;border-radius:18px;min-height:72px;padding:16px}.converter-input{letter-spacing:-.04em;width:100%;color:var(--foreground);appearance:none;pointer-events:auto;font-size:1.4rem}.range-inputs{gap:8px;display:grid}.range-input{min-height:52px;font-size:1.12rem}.time-estimator-inputs{gap:10px;display:grid}.workout-input,.workout-select{width:100%;min-height:56px;color:var(--foreground);appearance:none;font-size:1rem}.converter-input:focus,.workout-input:focus,.workout-select:focus{outline:2px solid var(--border-strong);outline-offset:2px}.workout-input.field-invalid,.workout-select.field-invalid{border-color:var(--error);box-shadow:0 0 0 2px color-mix(in srgb, var(--error) 18%, transparent)}.workout-input.field-invalid:focus,.workout-select.field-invalid:focus{outline-color:var(--error)}.converter-output{letter-spacing:-.04em;flex-direction:column;justify-content:space-between;font-size:1.75rem;transition:opacity .18s,transform .18s;display:flex}.range-output{font-size:1.35rem}.converter-output-value{overflow-wrap:anywhere}.result-updated{opacity:.78;transform:translateY(-1px)}.equals-sign{color:var(--muted);place-items:center;font-size:1.35rem;font-weight:600;line-height:1;display:grid}.output-block{padding-top:0}.controls-row,.action-row{grid-template-columns:minmax(0,1fr);gap:10px;margin-top:14px;display:grid}.toggle-button,.primary-button,.secondary-button{border:1px solid var(--border);min-height:52px;color:var(--foreground);-webkit-tap-highlight-color:transparent;pointer-events:auto;background:#fff;border-radius:16px;padding:0 16px;transition:background-color .14s,transform .14s,border-color .14s}.toggle-button,.primary-button{width:100%}.controls-row.converter-mode-toggle{border:1px solid var(--border);background:#fff;border-radius:16px;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;min-height:44px;padding:4px;display:grid}.converter-mode-toggle .toggle-button{min-height:44px;color:var(--muted);background:0 0;border-color:#0000;border-radius:12px;padding:0 12px;transition:all .16s;box-shadow:inset 0 0 0 1px #0000}.converter-mode-toggle .toggle-button.active{border-color:var(--border-strong);background:var(--foreground);color:#fff;box-shadow:inset 0 0 0 1px #ffffff29,0 3px 10px #0f172a1f}.toggle-button.active{border-color:var(--border-strong);background:var(--surface-strong)}.primary-button{background:var(--foreground);border-color:var(--foreground);color:#fff}.secondary-button{min-width:92px}.workout-builder,.workout-substack{gap:14px;margin-top:14px;display:grid}.workout-mode-select{margin-top:14px}.output-unit-control{gap:8px;margin-top:14px;display:grid}.output-unit-row{margin-top:0}.workout-panel{border:1px solid var(--border);background:#fff;border-radius:22px;padding:16px}.workout-panel-muted{opacity:.7}.workout-panel-header{justify-content:space-between;align-items:start;gap:12px;display:flex}.workout-panel-title{letter-spacing:-.03em;margin:0;font-size:1.2rem}.workout-panel-summary{color:var(--muted);margin:4px 0 0}.workout-panel-body{border-top:1px solid var(--border);gap:14px;margin-top:16px;padding-top:16px;display:grid}.workout-step-section{gap:8px;display:grid}.workout-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.pace-input-shell{display:block;position:relative}.pace-input-shell.with-unit .pace-inline-input{padding-right:68px}.pace-unit-button{border:1px solid var(--border);background:var(--surface);min-width:48px;min-height:34px;color:var(--foreground);-webkit-tap-highlight-color:transparent;border-radius:12px;font-size:.9rem;line-height:1;position:absolute;top:50%;right:10px;transform:translateY(-50%)}.pace-unit-button:active{background:var(--pressed)}.workout-inline-actions{flex-wrap:wrap;gap:10px;display:flex}.workout-pair{border:1px solid var(--border);background:var(--surface);border-radius:18px;gap:10px;padding:14px;display:grid}.workout-delete{color:var(--error);text-align:left;background:0 0;border:0;padding:0}.workout-toggle{justify-items:end;gap:6px;display:grid}.workout-toggle input{width:18px;height:18px}.workout-summary{margin-top:8px}.workout-summary h3{letter-spacing:-.03em;margin:8px 0 0;font-size:1.2rem}.workout-summary-list{gap:10px;margin:14px 0 0;padding-left:18px;display:grid}.workout-summary-structured{gap:14px;margin-top:14px;display:grid}.workout-summary-line,.workout-summary-block-title,.workout-summary-step{margin:0}.workout-summary-line{color:var(--foreground)}.workout-summary-block{gap:8px;display:grid}.workout-summary-block-title{font-weight:650}.workout-summary-block-steps{border-left:2px solid var(--border);gap:8px;margin-left:6px;padding-left:14px;display:grid}.workout-summary-step{color:var(--foreground)}.workout-summary-empty{color:var(--muted);margin:14px 0 0}.toggle-button:active,.primary-button:active,.secondary-button:active{transform:scale(.98)}.toggle-button:active,.secondary-button:active{background:var(--pressed)}.inline-error{color:#0000;min-height:20px;margin:10px 0 0;font-size:.9rem}.inline-error.visible{color:var(--error)}@media (min-width:640px){.page-shell{padding:40px 24px 56px}.converter-card{padding:28px}.conversion-grid{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:end;gap:12px}.equals-sign{align-self:end;min-height:72px;padding-bottom:0;font-size:1.9rem}.output-block{padding-top:0}.controls-row,.action-row{display:flex}.toggle-button,.primary-button{flex:1}.converter-output{font-size:1.6rem}.range-output{font-size:1.22rem}}@media (max-width:520px){.workout-row{grid-template-columns:minmax(0,1fr)}.workout-action-row{flex-wrap:wrap}.workout-inline-actions{flex-direction:column}.workout-action-row .secondary-button,.workout-action-row .primary-button{flex:calc(50% - 10px)}}