:root{--bg: #f4f6f7;--surface: #ffffff;--border: #dfe4e6;--border-strong: #c7ced1;--text: #1c2426;--muted: #5c6b70;--accent: #0f766e;--accent-dark: #0b564f;--accent-soft: #e6f2f1;--danger: #b3261e;--radius: 10px;--radius-sm: 7px;--shadow: 0 1px 2px rgba(16, 24, 26, .05);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Noto Sans", sans-serif;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;max-width:100%;overflow-x:hidden}body{font-family:var(--font);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-size:15px;line-height:1.45}#root{min-height:100vh}.app{display:flex;flex-direction:column;min-height:100vh}.topbar{position:sticky;top:0;z-index:20;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--surface);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand__logo{flex:0 0 auto;border-radius:8px}.brand__text{min-width:0}.brand__title{margin:0;font-size:1.05rem;font-weight:650;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.brand__subtitle{margin:1px 0 0;font-size:.72rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.body{display:flex;flex:1;align-items:flex-start;min-width:0}.sidebar{display:none;flex:0 0 232px;width:232px;align-self:stretch;padding:16px 12px;background:var(--surface);border-right:1px solid var(--border);position:sticky;top:57px;max-height:calc(100vh - 57px);overflow-y:auto}.nav__group+.nav__group{margin-top:16px}.nav__category{margin:0 0 6px;padding:0 8px;font-size:.68rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}.nav__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.nav__item{width:100%;text-align:left;padding:9px 10px;min-height:40px;font:inherit;font-size:.9rem;color:var(--text);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer}.nav__item:hover{background:var(--accent-soft)}.nav__item--active{background:var(--accent-soft);border-color:#cbe4e1;color:var(--accent-dark);font-weight:600}.sidebar__note{margin:20px 8px 0;font-size:.72rem;color:var(--muted)}.mobile-nav{display:flex;align-items:center;gap:10px;margin-bottom:14px}.mobile-nav__label{font-size:.8rem;font-weight:600;color:var(--muted);white-space:nowrap}.mobile-nav__select{flex:1;min-width:0;min-height:44px;padding:10px 12px;font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm)}.main{flex:1;min-width:0;padding:16px}.calc{display:grid;grid-template-columns:1fr;gap:16px;align-items:start}.calc__results{display:flex;flex-direction:column;gap:12px;min-width:0}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;min-width:0}.panel__head{margin-bottom:14px}.panel__title{margin:0;font-size:1.05rem;font-weight:650}.panel__desc{margin:4px 0 0;font-size:.82rem;color:var(--muted)}.panel__controls{margin-bottom:14px}.panel__fields{min-width:0}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field:last-child{margin-bottom:0}.field__label{font-size:.8rem;font-weight:600;color:var(--muted)}.field__control{display:flex;gap:8px;min-width:0}.field__input{flex:1;min-width:0;min-height:44px;padding:10px 12px;font:inherit;font-variant-numeric:tabular-nums;color:var(--text);background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm)}.field__input:focus,.field__unit:focus,.mobile-nav__select:focus,.sigfigs__select:focus,.nav__item:focus-visible,.segmented__btn:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.field__input--invalid{border-color:var(--danger);background:#fdf3f2}.field__unit{flex:0 0 auto;width:92px;min-height:44px;padding:10px 8px;font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm)}.field__suffix{display:flex;align-items:center;padding:0 12px;font-size:.82rem;color:var(--muted);background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm)}.segmented{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.segmented__label{font-size:.78rem;font-weight:600;color:var(--muted)}.segmented__track{display:inline-flex;padding:3px;background:var(--bg);border:1px solid var(--border);border-radius:999px}.segmented__btn{padding:6px 14px;min-height:34px;font:inherit;font-size:.82rem;color:var(--muted);background:transparent;border:none;border-radius:999px;cursor:pointer}.segmented__btn--active{color:#fff;background:var(--accent);font-weight:600}.settings{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.sigfigs{display:flex;align-items:center;gap:6px}.sigfigs__label{font-size:.78rem;font-weight:600;color:var(--muted)}.sigfigs__select{min-height:34px;padding:4px 8px;font:inherit;font-size:.82rem;color:var(--text);background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm)}.about{display:flex;flex-direction:column;gap:6px}.about__name-cn{font-size:1.05rem;font-weight:700}.about__name-en{font-size:.9rem;color:var(--muted)}.about__version{font-size:.85rem;color:var(--muted)}.about__desc{font-size:.88rem;line-height:1.6;margin-top:6px}.about__copyright{font-size:.8rem;color:var(--muted);margin-top:10px}.result{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;min-width:0}.result__head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}.result__label{margin:0;font-size:.78rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}.result__primary{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px}.result__value{font-size:2rem;font-weight:650;letter-spacing:-.02em;color:var(--accent-dark);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.result__unit{font-size:1.05rem;font-weight:600;color:var(--muted)}.result__equiv{list-style:none;display:flex;flex-wrap:wrap;gap:6px 18px;margin:14px 0 0;padding:14px 0 0;border-top:1px dashed var(--border)}.result__equiv-item{display:flex;align-items:baseline;gap:5px}.result__equiv-value{font-variant-numeric:tabular-nums;font-weight:550}.result__equiv-unit{font-size:.8rem;color:var(--muted)}.result__formula{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin-top:10px;font-size:.85rem}.result__formula code{font-family:var(--mono);font-size:.84rem;color:var(--text);background:var(--bg);padding:2px 7px;border-radius:5px;overflow-wrap:anywhere}.result__tag{font-size:.68rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);padding:2px 7px;border-radius:5px;white-space:nowrap}.conversion{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:2px}.conversion__row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:8px 10px;border-radius:var(--radius-sm)}.conversion__row:nth-child(odd){background:#fafbfb}.conversion__row--active{background:var(--accent-soft);font-weight:600}.conversion__value{font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.conversion__unit{flex:0 0 auto;color:var(--muted);font-size:.85rem}.btn{font:inherit;font-size:.8rem;border-radius:var(--radius-sm);cursor:pointer;border:1px solid transparent;min-height:34px;padding:6px 12px}.btn--ghost{color:var(--accent-dark);background:var(--surface);border-color:var(--border-strong)}.btn--ghost:hover:not(:disabled){background:var(--accent-soft)}.btn:disabled{opacity:.45;cursor:not-allowed}.result__controls{display:flex;align-items:center;gap:8px}.field__unit--inline{width:auto;min-height:30px;padding:3px 8px;font-size:.8rem}.field-error{margin:4px 0 0;color:var(--danger);font-size:.82rem;line-height:1.35}.result__empty{margin:0;padding:8px 0 4px;color:var(--muted);font-size:.88rem}.data-table{width:100%;border-collapse:collapse;font-size:.9rem}.data-table th,.data-table td{text-align:right;padding:7px 10px;border-bottom:1px solid var(--border)}.data-table th:first-child,.data-table td:first-child{text-align:left;color:var(--muted);width:3.5rem}.data-table thead th{font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);border-bottom:1px solid var(--border-strong)}.data-table tbody td:nth-child(2){font-family:var(--mono);font-weight:600;color:var(--text)}.data-table tbody tr:nth-child(2n){background:var(--accent-soft)}.data-table__initial td{color:var(--muted);font-style:italic}.data-table__initial td:nth-child(2){font-weight:500;color:var(--muted)}.topbar__right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.topbar__history{white-space:nowrap}.star{flex:0 0 auto;width:30px;height:30px;padding:0;font-size:1rem;line-height:1;color:var(--muted);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer}.star:hover{color:#d9a400;background:var(--accent-soft)}.star--on{color:#e0a800}.star--topbar{width:34px;height:34px;font-size:1.15rem;border-color:var(--border-strong);background:var(--surface)}.nav__row{display:flex;align-items:center;gap:2px}.nav__row .nav__item{flex:1;min-width:0}.nav__row .star{width:28px;height:34px;font-size:.9rem}.presets{margin-bottom:16px}.presets__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.presets__item{width:100%;display:flex;flex-direction:column;gap:1px;text-align:left;padding:7px 10px;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer}.presets__item:hover{background:var(--accent-soft);border-color:#cbe4e1}.presets__label{font-size:.86rem;font-weight:600}.presets__detail{font-size:.72rem;color:var(--muted);font-variant-numeric:tabular-nums}.seg-card{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);padding:10px 12px 12px;margin-bottom:10px}.seg-card__head{display:flex;align-items:center;gap:8px;margin-bottom:10px}.seg-card__title{font-size:.78rem;font-weight:700;color:var(--muted);letter-spacing:.03em}.seg-card__kind{flex:1;min-width:0;min-height:32px;padding:3px 8px;font:inherit;font-size:.82rem;color:var(--text);background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm)}.seg-card__vol{flex:0 0 auto;font-family:var(--mono);font-size:.82rem;color:var(--accent-dark);font-variant-numeric:tabular-nums}.seg-card__remove{flex:0 0 auto;width:28px;height:28px;padding:0;font-size:.9rem;color:var(--muted);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer}.seg-card__remove:hover{color:var(--danger);background:#fdf3f2}.seg-card__fields{min-width:0}.seg-add{width:100%;min-height:40px}.sweep-scroll{max-height:340px;overflow-y:auto;margin-top:4px}.drawer__backdrop{position:fixed;inset:0;z-index:40;background:#10181a59;opacity:0;pointer-events:none;transition:opacity .2s ease}.drawer__backdrop--open{opacity:1;pointer-events:auto}.drawer{position:fixed;top:0;right:0;z-index:50;display:flex;flex-direction:column;width:min(400px,92vw);height:100%;background:var(--surface);border-left:1px solid var(--border);box-shadow:-2px 0 16px #10181a24;transform:translate(100%);transition:transform .22s ease}.drawer--open{transform:translate(0)}.drawer__head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 16px;border-bottom:1px solid var(--border)}.drawer__title{margin:0;font-size:1rem;font-weight:650}.drawer__actions{display:flex;align-items:center;gap:8px}.drawer__close{width:32px;height:32px;padding:0;font-size:1rem;color:var(--muted);background:transparent;border:1px solid var(--border-strong);border-radius:var(--radius-sm);cursor:pointer}.drawer__close:hover{color:var(--text);background:var(--bg)}.drawer__body{flex:1;overflow-y:auto;padding:12px 16px 20px}.drawer__empty{margin:8px 0;color:var(--muted);font-size:.88rem;line-height:1.5}.history{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.history__item{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);padding:10px 12px}.history__main{display:flex;flex-direction:column;gap:2px;margin-bottom:8px}.history__name{font-size:.88rem;font-weight:650;color:var(--text)}.history__preview{font-family:var(--mono);font-size:.78rem;color:var(--accent-dark);overflow-wrap:anywhere}.history__time{font-size:.7rem;color:var(--muted)}.history__actions{display:flex;flex-wrap:wrap;gap:6px}.history__actions .btn{min-height:30px;padding:4px 10px;font-size:.76rem}@media (min-width: 900px){.calc{grid-template-columns:minmax(280px,360px) minmax(0,1fr)}}@media (min-width: 1024px){.sidebar{display:block}.mobile-nav{display:none}.main{padding:20px 24px}}@media (max-width: 400px){.result__value{font-size:1.7rem}.field__unit{width:82px}.brand__subtitle{display:none}}@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}