.vital-kit{--bg:#0b0d12;--bg-elevated:#141821;--bg-elevated-2:#1c2230;--border:#262c3a;--text:#eef1f7;--text-dim:#97a1b5;--text-faint:#667085;--accent:#ff4d6d;--accent-soft:rgba(255,77,109,.14);--good:#35d07f;--fair:#ffb020;--poor:#ff5a5f;--radius:16px;--radius-lg:24px;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;min-height:100dvh;color:var(--text);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overscroll-behavior-y:contain;padding:calc(var(--safe-top) + 16px)20px calc(var(--safe-bottom) + 24px);flex-direction:column;width:100%;max-width:560px;margin:0 auto;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif;display:flex}.vital-kit *,.vital-kit :before,.vital-kit :after{box-sizing:border-box}.topbar{justify-content:space-between;align-items:center;gap:12px;min-height:32px;margin-bottom:8px;display:flex}.topbar h1{letter-spacing:-.01em;margin:0;font-size:1.05rem;font-weight:600}.link-button{color:var(--text-faint);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:6px 8px;font-family:inherit;font-size:.82rem}.link-button:hover{color:var(--text-dim)}.page{flex-direction:column;flex:1;justify-content:center;gap:20px;display:flex}.page--top{justify-content:flex-start;padding-top:8px}.hero-title{letter-spacing:-.02em;margin:0;font-size:1.85rem;font-weight:700;line-height:1.15}.lead{color:var(--text-dim);margin:0;font-size:1rem;line-height:1.55}.section-title{text-transform:uppercase;letter-spacing:.09em;color:var(--text-faint);margin:0 0 10px;font-size:.78rem;font-weight:600}.fine-print{color:var(--text-faint);margin:0;font-size:.8rem;line-height:1.55}.card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.card--flush{padding:14px 16px}.stack{flex-direction:column;gap:14px;display:flex}.stack--tight{gap:8px}.button{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;border:none;border-radius:999px;width:100%;padding:16px 24px;font-family:inherit;font-size:1rem;font-weight:600;transition:transform .12s,opacity .12s}.button:active{transform:scale(.985)}.button:disabled{opacity:.5;cursor:default}.button--primary{background:var(--accent);color:#fff}.button--secondary{background:var(--bg-elevated-2);color:var(--text);border:1px solid var(--border)}.button--ghost{color:var(--text-dim);border:1px solid var(--border);background:0 0}.result{text-align:center;flex-direction:column;align-items:center;gap:6px;display:flex}.result__heart{font-size:2.6rem;line-height:1}.result__heart--beating{animation:1s ease-in-out infinite beat}@keyframes beat{0%,to{transform:scale(1)}14%{transform:scale(1.16)}28%{transform:scale(1)}42%{transform:scale(1.09)}}@media (prefers-reduced-motion:reduce){.result__heart--beating{animation:none}}.result__bpm{letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-size:4.5rem;font-weight:700;line-height:1}.result__bpm--placeholder{color:var(--text-faint)}.result__unit{color:var(--text-dim);letter-spacing:.14em;text-transform:uppercase;font-size:.95rem;font-weight:600}.result__provisional{color:var(--text-faint);letter-spacing:.05em;font-size:.78rem}.quality{flex-direction:column;align-items:center;gap:10px;display:flex}.quality__badge{letter-spacing:.05em;text-transform:uppercase;border-radius:999px;align-items:center;gap:8px;padding:7px 14px;font-size:.82rem;font-weight:600;display:inline-flex}.quality__badge--good{color:var(--good);background:rgba(53,208,127,.15)}.quality__badge--fair{color:var(--fair);background:rgba(255,176,32,.15)}.quality__badge--poor{color:var(--poor);background:rgba(255,90,95,.15)}.quality__dot{background:currentColor;border-radius:50%;width:8px;height:8px}.quality__reasons{text-align:center;flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.quality__reasons li{color:var(--text-dim);font-size:.85rem;line-height:1.45}.progress-ring{margin:0 auto;display:block}.progress-ring__track{stroke:var(--border)}.progress-ring__value{stroke:var(--accent);stroke-linecap:round;transition:stroke-dashoffset .15s linear}.progress-bar{background:var(--bg-elevated-2);border-radius:999px;height:8px;overflow:hidden}.progress-bar__fill{background:var(--accent);border-radius:999px;height:100%;transition:width .15s linear}.progress-meta{color:var(--text-dim);justify-content:space-between;margin-top:8px;font-size:.82rem;display:flex}.preview{border:2px solid var(--border);background:#000;border-radius:50%;flex:none;width:132px;height:132px;margin:0 auto;position:relative;overflow:hidden}.preview--large{border-radius:var(--radius-lg);width:100%;max-width:320px;height:240px}.preview--active{border-color:var(--accent);box-shadow:0 0 0 8px var(--accent-soft)}.preview video{object-fit:cover;width:100%;height:100%;display:block}.preview__placeholder{color:var(--text-faint);justify-content:center;align-items:center;font-size:2rem;display:flex;position:absolute;top:0;bottom:0;left:0;right:0}.preview--offscreen{opacity:0;pointer-events:none;border:none;width:2px;height:2px;position:absolute}.waveform{background:var(--bg-elevated-2);border-radius:12px;width:100%;height:90px;display:block}.rows{background:var(--border);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:1px;display:flex;overflow:hidden}.row{background:var(--bg-elevated);justify-content:space-between;align-items:baseline;gap:12px;padding:11px 14px;font-size:.88rem;display:flex}.row__label{color:var(--text-dim)}.row__value{font-variant-numeric:tabular-nums;text-align:right;font-weight:600}.row__value--ok{color:var(--good)}.row__value--bad{color:var(--poor)}.row__value--warn{color:var(--fair)}.instructions{color:var(--text-dim);margin:0;padding-left:20px;font-size:.92rem;line-height:1.7}.notice{border-radius:12px;padding:12px 14px;font-size:.87rem;line-height:1.5}.notice--info{background:var(--bg-elevated-2);color:var(--text-dim)}.notice--warn{color:#ffcf70;background:rgba(255,176,32,.12)}.notice--error{color:#ff9a9d;background:rgba(255,90,95,.12)}.status-line{text-align:center;color:var(--text-dim);min-height:1.4em;font-size:.95rem}.disclaimer{border-top:1px solid var(--border);margin-top:4px;padding-top:14px}.debug-grid{grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:8px;display:grid}.debug-cell{background:var(--bg-elevated);border:1px solid var(--border);border-radius:10px;padding:9px 11px}.debug-cell__label{text-transform:uppercase;letter-spacing:.07em;color:var(--text-faint);font-size:.66rem}.debug-cell__value{font-variant-numeric:tabular-nums;margin-top:3px;font-size:1.02rem;font-weight:600}.checks{flex-wrap:wrap;gap:6px;display:flex}.check{background:var(--bg-elevated-2);color:var(--text-faint);font-variant-numeric:tabular-nums;border-radius:999px;padding:4px 9px;font-size:.74rem}.check--pass{color:var(--good);background:rgba(53,208,127,.14)}.check--fail{color:var(--poor);background:rgba(255,90,95,.14)}.button-row{gap:8px;display:flex}.button-row .button{padding:12px 14px;font-size:.88rem}.vitals{flex-direction:column;gap:10px;display:flex}.vitals__divider{background:var(--border);height:1px;margin:8px 0 4px}.vitals__header{flex-direction:column;gap:4px;display:flex}.vitals__list{flex-direction:column;gap:8px;display:flex}.vital{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.vital[open]{background:var(--bg-elevated-2);border-color:#303747}.vital__summary{cursor:pointer;-webkit-tap-highlight-color:transparent;flex-direction:column;gap:6px;padding:14px 40px 14px 16px;list-style:none;display:flex;position:relative}.vital__summary::-webkit-details-marker{display:none}.vital__summary:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.vital__heading{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.vital__name{color:var(--text);font-size:.95rem;font-weight:600}.vital__tier{letter-spacing:.03em;text-transform:uppercase;border:1px solid var(--border);color:var(--text-faint);white-space:nowrap;border-radius:999px;padding:2px 7px;font-size:.66rem;font-weight:600}.vital__tier--directly-measured{color:var(--good);border-color:rgba(53,208,127,.35)}.vital__tier--ppg-derived{color:#6fb4ff;border-color:rgba(111,180,255,.35)}.vital__tier--algorithmically-estimated{color:var(--fair);border-color:rgba(255,176,32,.35)}.vital__tier--model-predicted{color:var(--poor);border-color:rgba(255,90,95,.4)}.vital__readout{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.vital__value{font-variant-numeric:tabular-nums;color:var(--text);font-size:1.5rem;font-weight:700;line-height:1.1}.vital__value--absent{color:var(--text-faint);font-size:1.1rem}.vital__category{font-size:.8rem;font-weight:500}.vital__category--good{color:var(--good)}.vital__category--watch{color:var(--fair)}.vital__category--alert{color:var(--poor)}.vital__category--neutral{color:var(--text-dim)}.vital__caveat{color:var(--fair);margin:2px 0 0;font-size:.76rem;line-height:1.45}.vital__chevron{border-right:2px solid var(--text-faint);border-bottom:2px solid var(--text-faint);width:8px;height:8px;transition:transform .16s;position:absolute;top:18px;right:16px;transform:rotate(45deg)}.vital[open] .vital__chevron{transform:rotate(-135deg)}.vital__body{border-top:1px solid var(--border);flex-direction:column;gap:14px;padding:14px 16px 16px;display:flex}.vital__section{flex-direction:column;gap:5px;display:flex}.vital__section-title{letter-spacing:.06em;text-transform:uppercase;color:var(--text-faint);margin:0;font-size:.72rem;font-weight:700}.vital__text{color:var(--text-dim);margin:0;font-size:.85rem;line-height:1.55}.vital__detail{flex-direction:column;gap:4px;margin:0;display:flex}.vital__detail-row{justify-content:space-between;align-items:baseline;gap:12px;font-size:.84rem;display:flex}.vital__detail-row dt{color:var(--text-dim)}.vital__detail-row dd{color:var(--text);font-variant-numeric:tabular-nums;text-align:right;margin:0;font-weight:600}.vital__meta{flex-wrap:wrap;gap:10px;display:flex}.vital__meta-item{background:var(--bg);border:1px solid var(--border);border-radius:12px;flex-direction:column;flex:40%;gap:2px;min-width:130px;padding:9px 11px;display:flex}.vital__meta-label{letter-spacing:.05em;text-transform:uppercase;color:var(--text-faint);font-size:.68rem}.vital__meta-value{color:var(--text);font-size:.85rem;font-weight:600}.vital__quality--good{color:var(--good)}.vital__quality--acceptable{color:#6fb4ff}.vital__quality--poor{color:var(--fair)}.vital__quality--unreliable{color:var(--poor)}.vital__limitations{color:var(--text-dim);flex-direction:column;gap:6px;margin:0;padding-left:18px;font-size:.82rem;line-height:1.5;display:flex}.vital--aside{background:0 0;border-style:dashed}.vital--aside .vital__name{color:var(--text-dim);font-size:.86rem;font-weight:500}@media (prefers-reduced-motion:reduce){.vital__chevron{transition:none}}.vital__signals{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.vital__health{border:1px solid transparent;border-radius:999px;align-items:center;gap:5px;padding:3px 9px;font-size:.76rem;font-weight:600;display:inline-flex}.vital__health--positive{color:var(--good);background:rgba(53,208,127,.12);border-color:rgba(53,208,127,.3)}.vital__health--caution{color:var(--fair);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.3)}.vital__health--negative{color:var(--poor);background:rgba(255,90,95,.12);border-color:rgba(255,90,95,.32)}.vital__health--not-assessed{color:var(--text-faint);border-color:var(--border);background:0 0}.vital__direction{color:var(--text-faint);font-size:.72rem}.vital__text--plain{color:var(--text);font-size:.88rem}.vital__verdict{border:1px solid var(--border);background:var(--bg);border-left-width:3px;border-radius:12px;flex-direction:column;gap:4px;padding:11px 13px;display:flex}.vital__verdict--positive{border-left-color:var(--good)}.vital__verdict--caution{border-left-color:var(--fair)}.vital__verdict--negative{border-left-color:var(--poor)}.vital__verdict--not-assessed{border-left-color:var(--text-faint)}.vital__verdict-head{color:var(--text);align-items:center;gap:6px;font-size:.86rem;font-weight:600;display:flex}.vital__verdict-note{color:var(--text-dim);font-size:.8rem;line-height:1.5}