:root{--accent-raw: #4f46e5;--accent: var(--accent-raw);--radius: 10px;--measure: 42rem;--leading: 1.85;--page-max: 70rem;--header-h: 64px;--font-body: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;--font-heading: var(--font-body);--heading-weight: 700;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--bg: #fafaf7;--surface: #ffffff;--ink: #1c1c1a;--ink-muted: #6b6b65;--hairline: #e7e6e0;--code-bg: #f2f1ec;color-scheme:light}[data-theme=dark]{--bg: #0f0f11;--surface: #17171b;--ink: #e9e8e4;--ink-muted: #98978f;--hairline: #28282d;--code-bg: #1e1e23;--accent: color-mix(in oklch, var(--accent-raw), white 18%);color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html{text-spacing-trim:trim-start;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 1.5rem);-webkit-text-size-adjust:100%}body{margin:0;min-height:100svh;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:17px;line-height:var(--leading);-webkit-font-smoothing:antialiased}@media(max-width:640px){body{font-size:16px}}img,svg,video{max-width:100%}button{font:inherit}:where([hidden]){display:none!important}::selection{background:var(--accent);color:var(--bg)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.accent-dot{color:var(--accent)}.skip-link{position:absolute;left:1rem;top:-100%;z-index:100;background:var(--surface);color:var(--ink);padding:.5em 1em;border:1px solid var(--hairline);border-radius:var(--radius);text-decoration:none}.skip-link:focus{top:.75rem}.container{width:100%;max-width:var(--page-max);margin-inline:auto;padding-inline:clamp(1.1rem,4vw,2rem)}.site-main{flex:1;width:100%;padding-bottom:4rem}.section-label{font-size:12px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;font-variant-numeric:tabular-nums;color:var(--ink-muted);margin:3rem 0 .5rem}.site-header{position:sticky;top:0;z-index:50;height:var(--header-h);background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--hairline)}.site-header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem}.wordmark{display:inline-flex;align-items:center;gap:.45ch;font-family:var(--font-heading);font-weight:var(--heading-weight);font-size:1.15rem;letter-spacing:.01em;color:var(--ink);text-decoration:none;white-space:nowrap;min-width:0}.wordmark-mark{flex:none;width:1.4em;height:1.4em}.wordmark-text{min-width:0;overflow:hidden;text-overflow:ellipsis}.site-nav{display:flex;align-items:center;gap:clamp(.9rem,2.5vw,1.5rem);font-size:.9rem}.site-nav>a{display:inline-flex;align-items:center;min-height:44px;color:var(--ink-muted);text-decoration:none;transition:color .2s ease;white-space:nowrap}.site-nav>a:hover{color:var(--accent)}.tsu-theme-toggle{position:relative;width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0;border:0;border-radius:50%;background:none;color:var(--ink-muted);cursor:pointer}.tsu-theme-toggle:hover{color:var(--accent)}.tsu-theme-toggle svg{position:absolute;transition:opacity .25s ease,transform .25s ease}.tsu-theme-toggle .icon-sun{opacity:1;transform:none}.tsu-theme-toggle .icon-moon{opacity:0;transform:rotate(45deg) scale(.6)}[data-theme=dark] .tsu-theme-toggle .icon-sun{opacity:0;transform:rotate(-45deg) scale(.6)}[data-theme=dark] .tsu-theme-toggle .icon-moon{opacity:1;transform:none}.page-title{margin:3rem 0 1rem;font-family:var(--font-heading);font-weight:var(--heading-weight);font-size:clamp(1.75rem,4.5vw,2.5rem);line-height:1.35;letter-spacing:.01em;word-break:auto-phrase}.site-footer{border-top:1px solid var(--hairline);margin-top:4rem;padding:2.25rem 0 2.75rem;font-size:.88rem;color:var(--ink-muted)}.footer-nav{display:flex;flex-wrap:wrap;gap:1.1rem;margin-bottom:1.1rem}.footer-nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--ink-muted);text-decoration:none;transition:color .2s ease}.footer-nav a:hover{color:var(--accent)}.footer-install-button{margin-bottom:1.1rem}.footer-install-hint{max-width:var(--measure);margin:0 0 1.1rem;color:var(--ink-muted);font-size:.85rem}.footer-sns{margin-bottom:1.1rem}.footer-amazon{margin:0 0 .8rem;font-size:12.5px}.footer-copy{margin:0;font-size:12.5px;letter-spacing:.02em;font-variant-numeric:tabular-nums}.footer-copy a{display:inline-flex;align-items:center;min-height:44px;color:inherit;text-underline-offset:3px}:root{--tsu-danger: #b42318}[data-theme=dark]{--tsu-danger: #f97066}.auth-form{max-width:24rem;margin:2rem 0}.form-field{margin:0 0 1.3rem}.form-field label{display:block;margin-bottom:.45rem;font-size:12px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-muted)}.form-field-checkbox,.form-field.form-field-checkbox label{display:inline-flex;align-items:center;gap:.6rem;min-height:44px;cursor:pointer}.form-field.form-field-checkbox label{margin-bottom:0;letter-spacing:normal;text-transform:none}.form-field-checkbox a{color:var(--accent);text-underline-offset:3px}.form-input{width:100%;min-height:44px;padding:.55em .8em;font:inherit;font-size:16px;color:var(--ink);background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius)}.form-input:focus-visible{border-color:var(--accent)}.btn-primary,.btn-secondary,.btn-danger{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.55em 1.5em;font-size:.95rem;font-weight:500;border-radius:var(--radius);cursor:pointer;text-decoration:none;transition:background-color .2s ease,color .2s ease,border-color .2s ease}.btn-primary{border:1px solid var(--accent);background:var(--accent);color:#fff}.btn-primary:hover{background:color-mix(in srgb,var(--accent) 86%,var(--ink));border-color:color-mix(in srgb,var(--accent) 86%,var(--ink))}.btn-secondary{border:1px solid var(--hairline);background:none;color:var(--ink)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}.btn-danger{border:1px solid var(--tsu-danger);background:var(--tsu-danger);color:var(--bg)}.btn-danger:hover{background:color-mix(in srgb,var(--tsu-danger) 86%,var(--ink));border-color:color-mix(in srgb,var(--tsu-danger) 86%,var(--ink))}.btn-primary:disabled,.btn-secondary:disabled,.btn-danger:disabled{opacity:.55;cursor:default}.form-error{margin:.9rem 0 0;font-size:.9rem;color:var(--tsu-danger)}.form-success{margin:.9rem 0 0;font-size:.9rem;color:var(--accent)}.form-note{margin:.9rem 0 0;font-size:.9rem;color:var(--ink-muted)}.auth-alt{margin:1.5rem 0 0;font-size:.9rem;color:var(--ink-muted)}.auth-alt a{color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.tsu-progress{display:none}}