:root{--bg:#edf1f5;--bg-soft:#e2e7ed;--fg:#11151b;--fg-dim:#5c6570;--card:#0d1117;--card-2:#1c212a;--card-3:#272d38;--card-fg:#f4f6f8;--card-fg-dim:#97a0ab;--chip:#ffffff12;--chip-border:#ffffff1f;--line:#ffffff17;--accent:#5b9bff;--accent-soft:#5b9bff29;--danger:#ff7373;--star:#ffd166;--menu-bg:#dde2e8;--menu-fg:#14181f;--radius:26px;--radius-sm:14px;--header-h:72px;--page-max:980px}[data-theme=dark]{--bg:#07090c;--bg-soft:#11151b;--fg:#eef1f4;--fg-dim:#98a1ac;--card:#14181f;--card-2:#1d232c;--card-3:#28303b;--menu-bg:#e4e8ec}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--fg);min-height:100dvh;margin:0;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}#root{min-height:100dvh}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;margin:-1px;position:absolute;overflow:hidden}:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}.app-header{z-index:50;pointer-events:none;justify-content:space-between;align-items:center;padding:14px clamp(14px,3vw,28px);display:flex;position:fixed;inset:0 0 auto}.app-header>*{pointer-events:auto}.brand{letter-spacing:-.01em;color:var(--fg);background:color-mix(in srgb, var(--bg) 78%, transparent);-webkit-backdrop-filter:blur(10px);border-radius:999px;padding:10px 16px;font-size:17px;font-weight:700;text-decoration:none}.brand span{color:var(--fg-dim);font-weight:600}.menu-anchor{position:relative}.pill{font:inherit;letter-spacing:.08em;cursor:pointer;border:none;border-radius:999px;align-items:center;gap:10px;padding:13px 20px;font-size:13px;font-weight:700;display:inline-flex}.pill-dark{background:var(--card);color:var(--card-fg)}.menu-dots{background:var(--card-3);border-radius:999px;align-items:center;gap:3px;margin:-6px -10px -6px 0;padding:7px 8px;display:inline-flex}.menu-dots i{background:var(--card-fg);border-radius:50%;width:4px;height:4px}.menu-card{background:var(--menu-bg);border-radius:22px;flex-direction:column;min-width:240px;padding:18px 8px;animation:.18s menu-in;display:flex;position:absolute;top:calc(100% + 10px);right:0;box-shadow:0 24px 60px #00000047}@keyframes menu-in{0%{opacity:0;transform:translateY(-8px)scale(.98)}to{opacity:1;transform:none}}.menu-link{color:var(--menu-fg);letter-spacing:-.02em;border-radius:14px;padding:8px 20px;font-size:26px;font-weight:700;text-decoration:none}.menu-link:hover,.menu-link.is-active{background:#00000012}.page{max-width:var(--page-max);padding:calc(var(--header-h) + 14px) clamp(14px, 3vw, 28px) 120px;margin:0 auto}.page-title{letter-spacing:-.03em;margin:18px 6px 22px;font-size:clamp(34px,6vw,52px);font-weight:700;line-height:1.05}.page-title span{color:var(--fg-dim)}.page-intro{color:var(--fg-dim);max-width:56ch;margin:-10px 6px 24px}.card{background:var(--card);color:var(--card-fg);border-radius:var(--radius);padding:clamp(22px,4vw,40px)}.card--alt{background:var(--card-2)}.card--alt2{background:var(--card-3)}.stack{flex-direction:column;gap:20px;display:flex}.stack>.stack-card{top:calc(var(--header-h) + 4px);position:sticky;box-shadow:0 -18px 40px #0000002e}.stack>.stack-card:nth-child(2){top:calc(var(--header-h) + 16px)}.stack>.stack-card:nth-child(3){top:calc(var(--header-h) + 28px)}.stack>.stack-card:nth-child(4){top:calc(var(--header-h) + 40px)}.stack>.stack-card:nth-child(5){top:calc(var(--header-h) + 52px)}.display{letter-spacing:-.03em;margin:0 0 14px;font-size:clamp(34px,6vw,56px);font-weight:700;line-height:1.04}.display b{color:var(--card-fg);font-weight:700;display:block}.display span{color:var(--card-fg-dim);font-weight:700;display:block}.chips{flex-wrap:wrap;gap:8px;margin:16px 0;display:flex}.chip{background:var(--chip);border:1px solid var(--chip-border);color:var(--card-fg);border-radius:999px;padding:8px 15px;font-size:13.5px;font-weight:500}button.chip{cursor:pointer;font:inherit;font-size:13.5px}button.chip:hover,button.chip.is-active{background:var(--accent-soft);border-color:var(--accent)}.blurb{color:var(--card-fg);gap:12px;max-width:58ch;margin:14px 0 0;display:flex}.blurb:before{content:"✳";color:var(--card-fg-dim);flex-shrink:0}.badge{background:var(--accent-soft);color:var(--accent);border-radius:999px;align-items:center;gap:7px;padding:6px 14px;font-size:13px;font-weight:600;display:inline-flex}.badge:before{content:"";background:currentColor;border-radius:50%;width:7px;height:7px}.card-link{color:var(--card-fg);background:var(--chip);border:1px solid var(--chip-border);border-radius:999px;align-items:center;gap:8px;margin-top:20px;padding:11px 20px;font-size:14.5px;font-weight:600;text-decoration:none;display:inline-flex}.card-link:hover{background:var(--accent-soft);border-color:var(--accent)}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin-top:18px;display:grid}.tool-card{background:var(--card-3);color:var(--card-fg);border-radius:18px;justify-content:space-between;align-items:flex-start;gap:10px;min-height:64px;padding:16px 16px 16px 18px;text-decoration:none;transition:transform .15s,background .15s;display:flex}.tool-card:hover{background:color-mix(in srgb, var(--card-3) 80%, var(--accent) 20%);transform:translateY(-2px)}.tool-card--compact{align-items:center;min-height:52px}.tool-card-text{flex-direction:column;gap:3px;display:flex}.tool-card-name{letter-spacing:-.01em;font-size:15.5px;font-weight:650}.tool-card-blurb{color:var(--card-fg-dim);font-size:13.5px;line-height:1.4}.star-btn{color:var(--card-fg-dim);cursor:pointer;background:0 0;border:none;border-radius:50%;flex-shrink:0;margin:-6px;padding:8px;line-height:0}.star-btn.is-fav,.star-btn:hover{color:var(--star)}.calc-card{flex-direction:column;gap:18px;display:flex}.calc-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.calc-head .display{margin:0}.calc-head .star-btn svg{width:26px;height:26px}.calc-inputs{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;display:grid}.calc-inputs .seg,.calc-inputs .field--wide{grid-column:1/-1}.field-label{color:var(--card-fg-dim);margin:0 4px 7px;font-size:13.5px;font-weight:600;display:block}.field-input-wrap{background:var(--chip);border:1px solid var(--chip-border);border-radius:var(--radius-sm);align-items:center;padding:0 14px;display:flex}.field-input-wrap:focus-within{border-color:var(--accent)}.field-input{min-width:0;color:var(--card-fg);font:inherit;background:0 0;border:none;outline:none;flex:1;padding:14px 0;font-size:19px;font-weight:600}.field-input::placeholder{color:var(--card-fg-dim);font-weight:400}.field-unit{color:var(--card-fg-dim);margin-left:10px;font-size:14px;font-weight:600}.seg{background:var(--chip);border:1px solid var(--chip-border);border-radius:999px;gap:4px;width:fit-content;padding:4px;display:inline-flex}.seg-btn{color:var(--card-fg-dim);font:inherit;cursor:pointer;background:0 0;border:none;border-radius:999px;min-height:40px;padding:9px 18px;font-size:14px;font-weight:600}.seg-btn.is-active{background:var(--card-fg);color:var(--card)}.calc-error{color:var(--danger);border-radius:var(--radius-sm);background:#ff73731f;border:1px solid #ff73734d;margin:0;padding:12px 16px;font-size:14.5px}.result-card{background:var(--card-3);text-align:center;border-radius:20px;padding:24px}.result-value{letter-spacing:-.02em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:0;font-size:clamp(40px,9vw,58px);font-weight:700;line-height:1.05}.result-unit{color:var(--card-fg-dim);letter-spacing:.02em;font-size:.42em;font-weight:600}.result-sub{color:var(--card-fg-dim);font-variant-numeric:tabular-nums;margin:8px 0 0;font-size:15.5px}.result-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:18px;display:flex}.btn{font:inherit;cursor:pointer;border:none;border-radius:999px;min-height:44px;padding:12px 22px;font-size:14.5px;font-weight:600}.btn-ghost{background:var(--chip);border:1px solid var(--chip-border);color:var(--card-fg)}.btn-ghost:hover{background:var(--accent-soft);border-color:var(--accent)}.btn-danger{color:var(--danger);background:#ff73731f;border:1px solid #ff737359}.collapsible{border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}.collapsible-toggle{width:100%;color:var(--card-fg);font:inherit;cursor:pointer;background:0 0;border:none;justify-content:space-between;align-items:center;padding:15px 18px;font-size:15px;font-weight:600;display:flex}.collapsible-chevron{color:var(--card-fg-dim);font-size:19px}.collapsible-body{color:var(--card-fg-dim);padding:0 18px 16px;font-size:14.5px}.collapsible-body p{margin:0 0 10px}.formula{background:var(--chip);color:var(--card-fg);border-radius:10px;padding:12px 14px;font-family:ui-monospace,SF Mono,SFMono-Regular,Menlo,monospace;font-size:14px;overflow-x:auto}.calc-disclaimer{color:var(--card-fg-dim);margin:0;font-size:13px}.table-wrap{border-radius:var(--radius-sm);border:1px solid var(--line);-webkit-overflow-scrolling:touch;margin-top:16px;overflow-x:auto}table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:14.5px}th{text-align:left;color:var(--card-fg-dim);text-transform:uppercase;letter-spacing:.06em;border-bottom:1px solid var(--line);white-space:nowrap;padding:12px 14px;font-size:12.5px;font-weight:650}td{border-bottom:1px solid var(--line);color:var(--card-fg);white-space:nowrap;padding:12px 14px}tr:last-child td{border-bottom:none}.cell-copy{color:inherit;font:inherit;font-variant-numeric:tabular-nums;cursor:pointer;background:0 0;border:none;border-radius:8px;margin:-4px -6px;padding:4px 6px}.cell-copy:hover{background:var(--chip);color:var(--accent)}.searchbar{background:var(--chip);border:1px solid var(--chip-border);color:var(--card-fg-dim);border-radius:999px;align-items:center;gap:10px;margin-top:16px;padding:4px 8px 4px 16px;display:flex}.searchbar:focus-within{border-color:var(--accent)}.searchbar input{min-width:0;color:var(--card-fg);font:inherit;background:0 0;border:none;outline:none;flex:1;padding:10px 0;font-size:16px}.searchbar input::placeholder{color:var(--card-fg-dim)}.searchbar button{color:var(--card-fg-dim);cursor:pointer;background:0 0;border:none;padding:4px 12px;font-size:22px}.entry-list{flex-direction:column;gap:10px;margin-top:16px;display:flex}.entry{background:var(--card-3);border-radius:16px;padding:16px 18px}.entry-head{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.entry-code{color:var(--accent);font-family:ui-monospace,SF Mono,SFMono-Regular,Menlo,monospace;font-size:16px;font-weight:700}.entry-name{font-size:15.5px;font-weight:650}.entry-tag{color:var(--card-fg-dim);text-transform:uppercase;letter-spacing:.05em;margin-left:auto;font-size:12.5px;font-weight:600}.entry-body{color:var(--card-fg-dim);margin:7px 0 0;font-size:14.5px}.entry-caution{color:var(--star);margin:8px 0 0;font-size:13.5px}.entry-caution:before{content:"⚠ "}.progress{background:var(--chip);border-radius:999px;height:8px;margin:14px 0 4px;overflow:hidden}.progress>div{background:var(--accent);border-radius:999px;height:100%;transition:width .25s}.progress-label{color:var(--card-fg-dim);margin:0 0 8px;font-size:13.5px}.check-section{margin-top:18px}.check-section h2{margin:0 0 8px;font-size:17px;font-weight:700}.check-item{background:var(--card-3);width:100%;color:var(--card-fg);font:inherit;text-align:left;cursor:pointer;border:none;border-radius:14px;align-items:center;gap:14px;min-height:52px;margin-bottom:8px;padding:14px 16px;font-size:15.5px;display:flex}.check-box{border:2px solid var(--card-fg-dim);color:#0000;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:15px;font-weight:800;display:inline-flex}.check-item.is-done .check-box{background:var(--accent);border-color:var(--accent);color:#fff}.check-item.is-done span:last-child{color:var(--card-fg-dim);text-decoration:line-through}.hero-badges{flex-wrap:wrap;gap:8px;margin-top:18px;display:flex}.recent-item{background:var(--card-3);border-radius:16px;margin-top:10px;padding:14px 18px}.recent-head{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.recent-tool{font-size:15px;font-weight:650}.recent-time{color:var(--card-fg-dim);white-space:nowrap;font-size:12.5px}.recent-detail{color:var(--card-fg-dim);overflow-wrap:anywhere;margin:4px 0 0;font-size:14px}.recent-result{color:var(--card-fg);font-weight:600}.empty{text-align:center;color:var(--card-fg-dim);padding:26px 16px}.empty-glyph{margin-bottom:8px;font-size:22px;display:block}.empty-title{color:var(--card-fg);margin:0 0 4px;font-weight:600}.empty-hint{margin:0;font-size:14px}.setting-row{border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;display:flex}.setting-row:last-child{border-bottom:none}.setting-name{font-size:15.5px;font-weight:650}.setting-hint{color:var(--card-fg-dim);margin:3px 0 0;font-size:13.5px}.about-line{margin:6px 0;font-size:15px}.about-line span{color:var(--card-fg-dim)}.bottomnav{z-index:40;background:color-mix(in srgb, var(--card) 92%, transparent);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0}.bottomnav-item{color:var(--card-fg-dim);border-radius:12px;flex-direction:column;align-items:center;gap:2px;min-width:52px;padding:6px 8px;font-size:10.5px;font-weight:600;text-decoration:none;display:flex}.bottomnav-item.is-active{color:var(--card-fg)}@media (width>=880px){.bottomnav{display:none}.page{padding-bottom:80px}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}