@layer reset,base,components,utilities;@layer reset{*,*:before,*:after{box-sizing:border-box}*{margin:0}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{min-height:100dvh}img,picture,video,canvas,svg{display:block;max-width:100%}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}ul[class],ol[class]{list-style:none;padding:0}}@layer base{:root{--space-1: .5rem;--space-2: 1rem;--space-3: 1.5rem;--space-4: 2rem;--space-5: 3rem;--space-6: 4rem;--radius-sm: .625rem;--radius-md: .875rem;--radius-lg: 1.375rem;--radius-pill: 999px;--shadow-sm: 0 1px 2px rgb(74 50 28 / .05), 0 6px 18px -6px rgb(74 50 28 / .1);--shadow-md: 0 2px 4px rgb(74 50 28 / .05), 0 18px 40px -14px rgb(74 50 28 / .2);--ease-spring: cubic-bezier(.3, 1.25, .55, 1);--ease-out: cubic-bezier(.16, 1, .3, 1);--color-bg: #fbf6ef;--color-bg-elevated: #ffffff;--color-surface: #ffffff;--color-surface-sunken: #f4ece1;--color-surface-hover: #f6efe6;--color-border: #ebe1d3;--color-border-strong: #9a8b7b;--color-text: #211c18;--color-text-secondary: #6b625a;--color-text-tertiary: #5f574f;--color-accent: #cc3f0b;--color-accent-hover: #b0350a;--color-accent-contrast: #ffffff;--color-accent-soft: #fde9df;--color-accent-ink: #b0350a;--color-result-bg: #fff6f0;--color-result-border: #f6d6c4;--color-success: #166534;--color-success-soft: #e3f4e6;--color-warning: #8a5a00;--color-warning-soft: #fbeed2;--color-danger: #b42318;--color-danger-soft: #fde4e1;--color-focus-ring: #cc3f0b;--font-sans: "Figtree Variable", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-heading: var(--font-sans);--font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;--font-jp: "Figtree Variable", "Noto Sans JP", system-ui, sans-serif;--font-sans-ja: var(--font-jp);--font-heading-ja: var(--font-jp);--text-xs: .8125rem;--text-sm: .9375rem;--text-base: 1.0625rem;--text-lg: 1.1875rem;--text-xl: 1.375rem;--text-2xl: 1.625rem;--text-3xl: 2rem;--text-4xl: clamp(2.25rem, 1.55rem + 2.6vw, 3.5rem);--max-width: 76rem;--header-height: 4.25rem;color-scheme:light dark}[data-theme=dark]{--color-bg: #191512;--color-bg-elevated: #24201c;--color-surface: #24201c;--color-surface-sunken: #1f1b17;--color-surface-hover: #2e2924;--color-border: #3a332d;--color-border-strong: #857767;--color-text: #f5efe8;--color-text-secondary: #b8ada1;--color-text-tertiary: #a59a8e;--color-accent: #ff7a45;--color-accent-hover: #ff9466;--color-accent-contrast: #1a0f08;--color-accent-soft: #3a2216;--color-accent-ink: #ff8a5c;--color-result-bg: #2b211b;--color-result-border: #4a3326;--color-success: #6ee7a0;--color-success-soft: #12331f;--color-warning: #fbbf24;--color-warning-soft: #3a2c06;--color-danger: #ff8a80;--color-danger-soft: #451a15;--color-focus-ring: #ff8a5c;--shadow-sm: 0 1px 2px rgb(0 0 0 / .35), 0 6px 18px -6px rgb(0 0 0 / .5);--shadow-md: 0 2px 4px rgb(0 0 0 / .4), 0 18px 40px -14px rgb(0 0 0 / .65)}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 1rem)}html[lang=ja]{--font-sans: var(--font-sans-ja);--font-heading: var(--font-heading-ja)}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:1.6;color:var(--color-text);background-color:var(--color-bg);display:flex;flex-direction:column;-webkit-font-smoothing:antialiased;font-optical-sizing:auto}main{flex:1}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);line-height:1.2;text-wrap:balance;color:var(--color-text)}h1{font-size:var(--text-4xl);font-weight:650;letter-spacing:-.022em;line-height:1.08}h2{font-size:clamp(1.5rem,1.2rem + 1vw,2rem);font-weight:650;letter-spacing:-.015em}h3{font-size:var(--text-xl);font-weight:650;letter-spacing:-.01em}h4{font-size:var(--text-lg);font-weight:650}h5{font-size:var(--text-base);font-weight:650}h6{font-size:var(--text-sm);font-weight:650}a{color:var(--color-accent-ink);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--color-accent-hover);text-decoration-thickness:2px}p{max-width:68ch}::selection{background-color:var(--color-accent-soft);color:var(--color-text)}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-thumb{background-color:var(--color-border-strong);border:3px solid var(--color-bg);border-radius:var(--radius-pill)}::-webkit-scrollbar-track{background-color:var(--color-bg)}*{caret-color:var(--color-accent)}:focus-visible{outline:2px solid var(--color-focus-ring);outline-offset:2px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}}@layer components{.container{width:100%;max-width:var(--max-width);margin-inline:auto;padding-inline:var(--space-2)}@media(min-width:48rem){.container{padding-inline:var(--space-4)}}.section{margin-block:var(--space-6)}.section--tight{margin-block:var(--space-3)}.label-plate{display:inline-flex;align-items:center;gap:.5rem;padding:.3125rem .75rem;border-radius:var(--radius-pill);background-color:var(--color-surface-sunken);color:var(--color-text-secondary);font-size:var(--text-xs);font-weight:600;line-height:1.4}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:48px;padding:.75em 1.375em;border-radius:var(--radius-md);border:1px solid transparent;font-weight:600;font-size:var(--text-base);line-height:1.2;text-decoration:none;transition:background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease,transform .28s var(--ease-spring)}.btn:active:not(:disabled){transform:scale(.97);transition-duration:.08s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background-color:var(--color-accent);color:var(--color-accent-contrast);box-shadow:0 1px 2px #8c280040,0 6px 14px -6px #cc3f0b8c}.btn--primary:hover:not(:disabled){background-color:var(--color-accent-hover);color:var(--color-accent-contrast)}.btn--secondary{background-color:var(--color-surface);color:var(--color-text);border-color:var(--color-border-strong)}.btn--secondary:hover:not(:disabled){background-color:var(--color-surface-sunken);color:var(--color-text)}.btn--ghost{background-color:transparent;color:var(--color-accent-ink)}.btn--ghost:hover:not(:disabled){background-color:var(--color-accent-soft);color:var(--color-accent-hover)}.btn--sm{min-height:40px;padding:.5em 1em;font-size:var(--text-sm)}@media(pointer:coarse){.btn--sm,.icon-btn,.nav__list a,.footer__list a{min-height:44px}.nav__list a,.footer__list a{display:inline-flex;align-items:center}}.field{display:flex;flex-direction:column;gap:.4375rem}.field__label{font-size:var(--text-sm);font-weight:600;color:var(--color-text)}.field__hint{font-size:var(--text-xs);color:var(--color-text-secondary)}.field__error{font-size:var(--text-sm);color:var(--color-danger);font-weight:600}.checkbox{display:flex;align-items:center;gap:.625rem;min-height:48px;padding:.625rem .875rem;background-color:var(--color-surface);border:1px solid var(--color-border-strong);border-radius:var(--radius-md);cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.checkbox:has(input:checked){border-color:var(--color-accent);background-color:var(--color-accent-soft)}.checkbox__input{width:1.25rem;height:1.25rem;accent-color:var(--color-accent);flex-shrink:0}.checkbox__label{font-size:var(--text-sm);font-weight:600;color:var(--color-text)}.input,.select,.textarea{width:100%;min-height:48px;padding:.6875rem .875rem;background-color:var(--color-surface);border:1px solid var(--color-border-strong);border-radius:var(--radius-md);color:var(--color-text);font-size:var(--text-base);transition:border-color .15s ease,box-shadow .15s ease}.input::placeholder,.textarea::placeholder{color:var(--color-text-secondary)}.input:hover,.select:hover,.textarea:hover{border-color:var(--color-text-secondary)}.input:focus,.select:focus,.textarea:focus{border-color:var(--color-accent);box-shadow:0 0 0 4px var(--color-accent-soft);outline:none}.input[aria-invalid=true],.select[aria-invalid=true],.textarea[aria-invalid=true]{border-color:var(--color-danger);box-shadow:0 0 0 4px var(--color-danger-soft)}.textarea{min-height:10rem;font-family:var(--font-mono);font-size:var(--text-sm);line-height:1.55;resize:vertical}.select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--color-text-secondary) 50%),linear-gradient(135deg,var(--color-text-secondary) 50%,transparent 50%);background-position:calc(100% - 1.15rem) 52%,calc(100% - .8rem) 52%;background-size:.35rem .35rem;background-repeat:no-repeat;padding-right:2.5rem}.input-group{display:flex;align-items:stretch;position:relative}.input-prefix{position:absolute;left:.875rem;top:0;bottom:0;display:inline-flex;align-items:center;color:var(--color-text-secondary);font-weight:600;pointer-events:none;z-index:1}.input-group .input{padding-left:2rem}.tool-form{display:grid;gap:var(--space-3)}.tool-form__fields{display:grid;grid-template-columns:1fr;gap:var(--space-2) var(--space-3)}@media(min-width:48rem){.tool-form__fields{grid-template-columns:repeat(2,1fr)}}.tool-form__actions{display:flex;flex-wrap:wrap;gap:var(--space-1)}.unit-toggle{border:0;padding:0;margin:0 0 var(--space-2);display:grid;gap:.5rem;min-width:0}.unit-toggle__legend{font-size:var(--text-sm);font-weight:600;padding:0;margin-bottom:.5rem}.unit-toggle__options{display:flex;flex-wrap:nowrap;gap:.25rem;padding:.3125rem;background-color:var(--color-surface-sunken);border-radius:var(--radius-md);width:fit-content;max-width:100%}.unit-toggle__option{display:inline-flex;flex:1 1 0;justify-content:center;text-align:center;line-height:1.25;align-items:center;gap:.375rem;min-height:40px;padding:.4375rem .9375rem;border-radius:var(--radius-sm);font-size:var(--text-sm);font-weight:600;color:var(--color-text-secondary);cursor:pointer;transition:background-color .18s ease,color .18s ease,box-shadow .18s ease}.unit-toggle__option:hover{color:var(--color-text)}.unit-toggle__option:has(input:checked){background-color:var(--color-surface);color:var(--color-text);box-shadow:var(--shadow-sm)}.unit-toggle__option:has(input:focus-visible){outline:2px solid 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2vw,3.25rem);font-weight:650;line-height:1.05;letter-spacing:-.03em;font-variant-numeric:tabular-nums}.bar{position:relative;display:flex;height:.625rem;border-radius:var(--radius-pill);background-color:var(--color-surface-sunken);overflow:hidden}.result-panel .bar{background-color:color-mix(in srgb,var(--color-result-border) 55%,var(--color-surface))}.bar__fill{position:relative;height:100%;width:0;background-color:var(--color-accent);border-radius:var(--radius-pill);transform:scaleX(0);transform-origin:left;transition:transform .6s var(--ease-out)}.bar__fill.is-set{transform:scaleX(1)}.bar__fill[data-polarity=positive]{background-color:var(--color-accent)}.bar__fill[data-polarity=negative]{background-color:var(--color-danger)}.bar__fill--stack-secondary{background-color:var(--color-border-strong)}.bar__fill--muted{background-color:var(--color-text-tertiary);opacity:.45}.result-summary{margin-top:var(--space-3);font-size:var(--text-base);font-weight:500;color:var(--color-text);max-width:68ch}.result-actions{display:flex;flex-wrap:wrap;gap:var(--space-1);margin-top:var(--space-2);padding-top:var(--space-2);border-top:1px solid var(--color-result-border)}.size-compare{display:grid;gap:.625rem;margin-top:var(--space-1)}.size-compare__row{display:grid;grid-template-columns:4.5rem 1fr 6rem;gap:.75rem;align-items:center}.size-compare__label{font-size:var(--text-xs);font-weight:600;color:var(--color-text-secondary)}.size-compare__bar{height:.5rem}.size-compare__value{font-size:var(--text-xs);color:var(--color-text-secondary);text-align:right;font-variant-numeric:tabular-nums}.rack{margin-top:var(--space-2);padding:.375rem;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.rack:empty{display:none}.rack-row{position:relative;display:grid;grid-template-columns:2.75rem minmax(0,1fr) 1.25rem;grid-template-areas:"icon cat go" "icon name go" "icon desc go";column-gap:.875rem;row-gap:.0625rem;align-items:center;padding:.875rem;border-radius:var(--radius-md);text-decoration:none;color:var(--color-text);transition:background-color .15s ease}.rack>*+*{box-shadow:0 -1px color-mix(in srgb,var(--color-border) 70%,transparent)}.rack>*+.rack-row,.rack>*+* .rack-row{margin-top:1px}.rack-row__icon{grid-area:icon;align-self:center;display:grid;place-items:center;width:2.75rem;height:2.75rem;border-radius:var(--radius-md);background-color:var(--color-accent-soft);color:var(--color-accent-ink);transition:transform .3s var(--ease-spring)}.rack-row:hover .rack-row__icon{transform:scale(1.06) rotate(-4deg)}.rack-row:after{content:"";grid-area:go;width:1.25rem;height:1.25rem;background-color:var(--color-text-secondary);mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 6 6 6-6 6'/%3E%3C/svg%3E") center / contain no-repeat;transition:transform .28s 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svg{fill:currentColor}@media(pointer:coarse){.fav-toggle{width:44px;height:44px;right:.375rem}}.icon-chip{display:grid;place-items:center;width:2.5rem;height:2.5rem;border-radius:var(--radius-sm);background-color:var(--color-accent-soft);color:var(--color-accent-ink);margin-bottom:.25rem}.badge{display:inline-flex;align-items:center;gap:.375rem;padding:.1875rem .625rem;border-radius:var(--radius-pill);font-size:var(--text-xs);font-weight:600;background-color:var(--color-surface-sunken);color:var(--color-text-secondary);width:fit-content}.badge--success{background-color:var(--color-success-soft);color:var(--color-success)}.prose{max-width:70ch;display:grid;gap:var(--space-3)}.prose h2{margin-top:var(--space-3)}.prose ul,.prose ol{padding-left:1.375rem;display:grid;gap:.5rem}.prose ul{list-style:disc}.prose ol{list-style:decimal}.prose li::marker{color:var(--color-text-secondary)}.prose table,.tool-page__content table{width:100%;border-collapse:separate;border-spacing:0;font-size:var(--text-sm);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;background-color:var(--color-surface)}.prose th,.prose td,.tool-page__content th,.tool-page__content td{border-bottom:1px solid var(--color-border);padding:.625rem .875rem;text-align:left;vertical-align:top}.prose tr:last-child>*,.tool-page__content tr:last-child>*{border-bottom:0}.prose thead th,.tool-page__content thead th{background-color:var(--color-surface-sunken);font-weight:650}.prose code,.tool-page__content code{font-family:var(--font-mono);font-size:.875em;background-color:var(--color-surface-sunken);border-radius:.375rem;padding:.125rem .375rem}.prose pre{background-color:var(--color-surface-sunken);border-radius:var(--radius-md);padding:var(--space-2);overflow-x:auto;font-size:var(--text-sm);line-height:1.55}.prose pre code{background:none;padding:0}.prose blockquote{background-color:var(--color-surface-sunken);border-radius:var(--radius-md);padding:var(--space-2) var(--space-3);color:var(--color-text)}.formula,.prose .formula{font-family:var(--font-mono);background-color:var(--color-surface-sunken);border-radius:var(--radius-md);padding:.875rem 1.125rem;overflow-x:auto;font-size:var(--text-base);max-width:none}.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.375rem;font-size:var(--text-sm);color:var(--color-text-secondary)}.breadcrumbs a{color:var(--color-text-secondary);text-decoration:none}.breadcrumbs a:hover{color:var(--color-accent-ink);text-decoration:underline}.breadcrumbs [aria-current=page]{color:var(--color-text);font-weight:600}.breadcrumbs__sep{color:var(--color-border-strong)}.privacy-note{display:inline-flex;align-items:center;gap:.4375rem;width:fit-content;font-size:var(--text-sm);font-weight:600;color:var(--color-text);padding:.375rem .875rem .375rem 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