:root{color-scheme:light;--bg: #f7f5f0;--glow-0: #fff8ef;--glow-1: rgba(255, 248, 239, 0);--surface: #ffffff;--ink: #17171a;--ink-soft: #3a3a41;--muted: #5c5c66;--line: #e3ded4;--line-strong: #cfc7b8;--accent: #c2410c;--accent-hover: #9a3412;--accent-soft: #fdeee3;--accent-line: rgba(194, 65, 12, .4);--btn-bg: #c2410c;--btn-hover: #9a3412;--btn-ink: #ffffff;--solid-bg: #17171a;--solid-hover: #2b2b31;--solid-ink: #ffffff;--hover-fill: rgba(23, 23, 26, .06);--header-bg: rgba(247, 245, 240, .86);--footer-bg: rgba(255, 255, 255, .4);--card-bg: rgba(255, 255, 255, .62);--card-bg-hover: #ffffff;--faint: #8a8a94;--notice-bg: #fff4ea;--notice-line: #f0c9a8;--notice-ink: #7c2d12;--shadow: rgba(23, 23, 26, .45);--shadow-soft: rgba(23, 23, 26, .6);--frame-inset: rgba(255, 255, 255, .4);--focus: #c2410c;--scroll-thumb: #cfc7b8;--scroll-track: #f7f5f0;--dark: #0d0d12;--radius: 18px;--wrap: 1080px;--reading: 68ch;--font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace}:root[data-theme=dark]{color-scheme:dark;--bg: #0d0d12;--glow-0: #1e1712;--glow-1: rgba(30, 23, 18, 0);--surface: #16161c;--ink: #f4f4f5;--ink-soft: #d4d4d8;--muted: #a3a3ad;--line: #2b2b34;--line-strong: #3a3a45;--accent: #fb923c;--accent-hover: #fdba74;--accent-soft: rgba(251, 146, 60, .16);--accent-line: rgba(251, 146, 60, .45);--btn-bg: #f97316;--btn-hover: #fb923c;--btn-ink: #0d0d12;--solid-bg: #f4f4f5;--solid-hover: #e4e4e7;--solid-ink: #0d0d12;--hover-fill: rgba(255, 255, 255, .08);--header-bg: rgba(13, 13, 18, .86);--footer-bg: rgba(255, 255, 255, .03);--card-bg: rgba(255, 255, 255, .04);--card-bg-hover: #1d1d24;--faint: #8b8b96;--notice-bg: rgba(251, 146, 60, .12);--notice-line: rgba(251, 146, 60, .35);--notice-ink: #fdba74;--shadow: rgba(0, 0, 0, .55);--shadow-soft: rgba(0, 0, 0, .6);--frame-inset: rgba(255, 255, 255, .06);--focus: #fb923c;--scroll-thumb: #3a3a45;--scroll-track: #0d0d12}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scrollbar-color:var(--scroll-thumb) var(--scroll-track)}body{margin:0;min-height:100vh;color:var(--ink);font-family:var(--font-sans);font-size:16px;line-height:1.6;background:radial-gradient(1100px 520px at 50% -12%,var(--glow-0) 0%,var(--glow-1) 62%),var(--bg);-webkit-font-smoothing:antialiased}a{color:inherit}button,input{font:inherit}button{cursor:pointer}img{max-width:100%}::selection{background:var(--accent-soft);color:var(--ink)}:where(a,button,input,summary,[tabindex]):focus-visible{outline:2px solid var(--focus);outline-offset:2px}.site-header{position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line);background:var(--header-bg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:min(var(--wrap),calc(100% - 40px));margin:0 auto;padding:14px 0}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;letter-spacing:-.02em;text-decoration:none;white-space:nowrap}.brand__mark{display:grid;place-items:center;width:34px;height:30px;border-radius:9px;background:var(--solid-bg);color:var(--solid-ink);font-size:11.5px;font-weight:800;letter-spacing:0}.site-nav{display:flex;align-items:center;gap:6px;min-width:0;overflow-x:auto;scrollbar-width:none}.site-nav::-webkit-scrollbar{display:none}.site-nav a{padding:8px 12px;border-radius:999px;color:var(--muted);font-size:14px;font-weight:500;text-decoration:none;white-space:nowrap;transition:background .15s ease,color .15s ease}.site-nav a:hover{background:var(--hover-fill);color:var(--ink)}.site-nav a[aria-current=page]{background:var(--solid-bg);color:var(--solid-ink)}.site-header__actions{display:flex;align-items:center;gap:8px;min-width:0}.theme-switch{position:relative;flex:none}.theme-switch__trigger{display:grid;place-items:center;width:36px;height:36px;padding:0;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);cursor:pointer;transition:background .15s ease,border-color .15s ease}.theme-switch__trigger:hover{border-color:var(--line-strong);background:var(--card-bg-hover)}.theme-switch__icon{display:block;width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}.theme-switch__icon--moon{display:none}:root[data-theme=dark] .theme-switch__icon--sun{display:none}:root[data-theme=dark] .theme-switch__icon--moon{display:block}.wrap{width:min(var(--wrap),calc(100% - 40px));margin:0 auto;padding:56px 0 80px}.crumbs{margin:0 0 28px;color:var(--muted);font-size:13px}.crumbs a{text-decoration:none}.crumbs a:hover{text-decoration:underline}.crumbs span{margin:0 8px;opacity:.5}.hero{max-width:820px}.eyebrow{display:inline-flex;align-items:center;gap:10px;margin:0 0 16px;color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.eyebrow:before{content:"";display:block;width:26px;height:2px;background:currentColor}h1{margin:0;font-size:clamp(2.15rem,5.2vw,3.65rem);line-height:1.04;letter-spacing:-.045em;text-wrap:balance}.lead{max-width:66ch;margin:20px 0 0;color:var(--muted);font-size:clamp(1.02rem,1.5vw,1.18rem);line-height:1.65}.trust{display:flex;flex-wrap:wrap;gap:8px 18px;margin:26px 0 0;padding:0;list-style:none;color:var(--muted);font-size:13.5px}.trust li{display:inline-flex;align-items:center;gap:7px}.trust li:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}.doors{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;max-width:760px;margin:30px 0 0}.door{display:flex;flex-direction:column;gap:6px;padding:20px 22px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--card-bg);color:var(--ink);text-decoration:none;transition:border-color .15s ease,background .15s ease,transform .15s ease}.door:hover{border-color:var(--accent-line);background:var(--card-bg-hover);transform:translateY(-1px)}.door__kicker{color:var(--accent);font-family:var(--font-mono);font-size:11.5px;font-weight:600;letter-spacing:.06em}.door strong{font-size:1.14rem;letter-spacing:-.02em}.door__note{color:var(--muted);font-size:14px;line-height:1.6}.door__cta{margin-top:6px;color:var(--ink);font-size:13.5px;font-weight:600}.door__cta:after{content:" →";color:var(--accent)}.sample-link{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;max-width:760px;margin:14px 0 0;padding:12px 18px;border:1px dashed var(--line-strong);border-radius:var(--radius);color:var(--ink);text-decoration:none;transition:border-color .15s ease,background .15s ease}.sample-link:hover{border-color:var(--accent-line);background:var(--card-bg-hover)}.sample-link__title{font-size:14px;font-weight:600}.sample-link__title:after{content:" →";color:var(--accent)}.sample-link__note{color:var(--muted);font-size:13px}.tools{margin-top:52px;padding-top:30px;border-top:1px solid var(--line)}.tools h2{margin:0 0 6px;font-size:1.05rem;letter-spacing:-.02em}.tools__intro{margin:0 0 18px;color:var(--muted);font-size:14.5px}.tools__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}.tool-card{display:flex;flex-direction:column;gap:5px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--card-bg);text-decoration:none;transition:border-color .15s ease,background .15s ease}.tool-card:hover{border-color:var(--accent-line);background:var(--card-bg-hover)}.tool-card__kind{color:var(--faint);font-family:var(--font-mono);font-size:10.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase}.tool-card__label{color:var(--ink);font-size:15px;font-weight:600;letter-spacing:-.01em}.tool-card__note{color:var(--muted);font-size:13.5px;line-height:1.55}.bridge{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;margin:32px 0 0;padding:16px 18px;border:1px dashed var(--line-strong);border-radius:14px;color:var(--muted);font-size:14.5px}.bridge a{color:var(--ink);font-weight:600}.demo{min-height:100vh;min-height:100svh;padding:calc(30px + env(safe-area-inset-top)) 20px calc(30px + env(safe-area-inset-bottom))}.demo__panel{max-width:520px;margin:0 auto;text-align:center}.demo__status,.demo__error{margin:0 0 8px;color:var(--muted);font-size:14px}.demo__error{color:var(--accent)}.demo__hint{margin:0;color:var(--faint);font-size:13px}.demo__hint a{color:var(--ink)}.demo__credit{max-width:48ch;margin:14px auto 0;color:var(--faint);font-size:12px;line-height:1.65}.demo__credit a{color:var(--muted);text-decoration:underline;text-underline-offset:2px}.reader-section{margin:38px 0 8px}.reader-frame{overflow:hidden;border:1px solid var(--line);border-radius:calc(var(--radius) + 6px);background:var(--dark);box-shadow:0 1px 0 var(--frame-inset) inset,0 24px 60px -32px var(--shadow)}.reader-note{margin:12px 2px 0;color:var(--muted);font-size:12.5px}.converter-section{margin:38px 0 8px}.converter-shell{padding:8px;border:1px solid var(--line);border-radius:calc(var(--radius) + 6px);background:var(--card-bg);box-shadow:0 1px 0 var(--frame-inset) inset,0 24px 60px -38px var(--shadow)}.converter-fallback{min-height:300px;display:flex;flex-direction:column;justify-content:center;padding:40px 22px;border:1.5px dashed var(--line-strong);border-radius:16px;background:var(--surface);color:var(--ink);text-align:center}.converter-kicker{margin:0 0 10px;color:var(--accent);font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}.converter-fallback h2{margin:0;font-size:clamp(1.35rem,3vw,1.8rem);letter-spacing:-.02em}.converter-fallback p{max-width:46ch;margin:12px auto 0;color:var(--muted);font-size:14.5px;line-height:1.6}.converter-fallback p.converter-fine{margin-top:18px;color:var(--faint);font-size:12.5px}.shelf{margin:30px 0 0}.shelf__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:12px}.shelf__head h2{margin:0;font-size:17px;letter-spacing:-.01em}.shelf__clear{padding:4px 2px;border:0;background:none;color:var(--muted);font:inherit;font-size:12.5px;text-decoration:underline;text-underline-offset:3px;cursor:pointer}.shelf__clear:hover{color:var(--accent)}.shelf__list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px;margin:0;padding:0;list-style:none}.shelf__item{position:relative;display:flex}.shelf__card{display:flex;flex:1;align-items:center;gap:12px;min-width:0;padding:10px 36px 10px 10px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:inherit;font:inherit;text-align:left;cursor:pointer;transition:border-color .15s ease,box-shadow .15s ease}.shelf__card:hover{border-color:var(--line-strong);box-shadow:0 10px 24px -18px var(--shadow-soft)}.shelf__cover{flex:0 0 auto;width:46px;height:64px;border-radius:6px;background:var(--accent-soft);object-fit:cover}.shelf__cover--empty{display:grid;place-items:center;color:var(--accent);font-size:12px;font-weight:700}.shelf__body{display:flex;flex-direction:column;gap:3px;min-width:0}.shelf__name{overflow:hidden;color:var(--ink);font-size:13px;font-weight:600;text-overflow:ellipsis;white-space:nowrap}.shelf__meta{overflow:hidden;color:var(--muted);font-size:11.5px;text-overflow:ellipsis;white-space:nowrap}.shelf__time{color:var(--faint);font-size:11px}.shelf__delete{position:absolute;top:6px;right:6px;width:26px;height:26px;border:0;border-radius:8px;background:transparent;color:var(--faint);font-size:15px;line-height:1;cursor:pointer}.shelf__delete:hover{background:var(--accent-soft);color:var(--accent)}.shelf__hint{margin:10px 2px 0;padding:8px 10px;border-radius:10px;background:var(--accent-soft);color:var(--notice-ink);font-size:12.5px}.reader-fallback{display:grid;place-items:center;min-height:420px;padding:28px;background:radial-gradient(560px 220px at 50% 0%,rgba(194,65,12,.16),transparent 70%),var(--dark)}.dropzone{width:min(640px,100%);padding:52px 28px;border:1.5px dashed rgba(255,255,255,.22);border-radius:16px;color:#f5f5f7;text-align:center;transition:border-color .2s ease,background .2s ease}.dropzone:hover{border-color:#ffffff6b;background:#ffffff08}.dropzone__kicker{margin:0 0 12px;color:#fb923c;font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}.dropzone h2{margin:0;color:#fff;font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.03em}.dropzone p{max-width:44ch;margin:12px auto 0;color:#f5f5f7ad;font-size:14.5px}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;margin-top:24px;padding:0 22px;border:0;border-radius:999px;background:var(--btn-bg);color:var(--btn-ink);font-weight:650;text-decoration:none;box-shadow:0 10px 24px -10px #c2410ccc;transition:background .15s ease,transform .15s ease}.btn-primary:hover{background:var(--btn-hover);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.dropzone__fine{margin-top:18px!important;color:#f5f5f785!important;font-size:12px!important}.content{max-width:780px;margin-top:56px}.content section{padding:30px 0;border-top:1px solid var(--line)}.content h2{margin:0 0 14px;font-size:clamp(1.24rem,2.2vw,1.55rem);line-height:1.25;letter-spacing:-.025em}.content p{max-width:var(--reading);margin:0 0 14px;color:var(--ink-soft);line-height:1.75}.content p:last-child{margin-bottom:0}.content ul{max-width:var(--reading);margin:0;padding:0;list-style:none}.content li{position:relative;margin:0 0 10px;padding-left:22px;color:var(--ink-soft);line-height:1.65}.content li:before{content:"";position:absolute;top:.62em;left:2px;width:7px;height:7px;border-radius:2px;background:var(--accent)}.section-note{max-width:var(--reading);margin:22px 0 0;padding:18px 20px;border:1px solid var(--line-strong);border-left:3px solid var(--accent);border-radius:12px;background:var(--accent-soft)}.section-note h3{margin:0 0 10px;font-size:1.02rem;letter-spacing:-.01em}.section-note p{margin-bottom:10px}.contact{margin-top:4px}.contact a{display:inline-block;padding:4px 10px;border:1px solid var(--line-strong);border-radius:999px;background:var(--surface);color:var(--accent);font-weight:650;text-decoration:underline;text-decoration-style:dotted;text-underline-offset:3px}.contact a:hover{border-color:var(--accent)}.faq{margin-top:24px;padding-top:30px;border-top:1px solid var(--line)}.faq h2{margin:0 0 8px;font-size:clamp(1.24rem,2.2vw,1.55rem);letter-spacing:-.025em}.faq details{border-bottom:1px solid var(--line)}.faq summary{position:relative;padding:18px 36px 18px 0;font-weight:600;line-height:1.4;cursor:pointer;list-style:none}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";position:absolute;top:50%;right:6px;color:var(--accent);font-size:20px;font-weight:400;transform:translateY(-50%)}.faq details[open] summary:after{content:"−"}.faq details p{max-width:var(--reading);margin:0;padding:0 24px 18px 0;color:var(--muted);line-height:1.7}.cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin-top:44px;padding:24px 26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}.cta h2{margin:0;font-size:1.15rem;letter-spacing:-.02em}.cta p{margin:4px 0 0;color:var(--muted);font-size:14px}.cta .btn-primary{margin-top:0;background:var(--solid-bg);color:var(--solid-ink);box-shadow:none}.cta .btn-primary:hover{background:var(--solid-hover)}.related{margin-top:56px;padding-top:30px;border-top:1px solid var(--line)}.related h2{margin:0 0 18px;font-size:1.05rem;letter-spacing:-.02em}.related__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.related__grid a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--card-bg);font-size:14px;font-weight:550;text-decoration:none;transition:border-color .15s ease,background .15s ease,transform .15s ease}.related__grid a:hover{border-color:var(--accent-line);background:var(--card-bg-hover);transform:translateY(-1px)}.related__grid a:after{content:"→";color:var(--accent)}.site-footer{border-top:1px solid var(--line);background:var(--footer-bg)}.site-footer__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;width:min(var(--wrap),calc(100% - 40px));margin:0 auto;padding:26px 0 34px;color:var(--muted);font-size:13px}.site-footer nav{display:flex;flex-wrap:wrap;gap:16px}.site-footer a{text-decoration:none}.site-footer a:hover{color:var(--ink);text-decoration:underline}.noscript{margin:16px 0;padding:14px 16px;border:1px solid var(--notice-line);border-radius:12px;background:var(--notice-bg);color:var(--notice-ink);font-size:14px}@media(max-width:760px){.wrap{width:min(var(--wrap),calc(100% - 28px));padding-top:34px}.site-header__inner{width:min(var(--wrap),calc(100% - 28px));gap:12px}.theme-switch__trigger{width:34px;height:34px}.site-nav a{padding:7px 9px;font-size:13px}.site-nav a:nth-child(n+3):not([aria-current=page]){display:none}.doors{grid-template-columns:1fr;max-width:none}.reader-fallback{min-height:340px;padding:14px}.converter-fallback{min-height:280px;padding:30px 14px}.dropzone{padding:36px 18px}.content{margin-top:38px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}