@font-face{font-family:"Bricolage Grotesque";src:url("fonts/bricolage-latin.woff2") format("woff2");font-weight:200 800;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Bricolage Grotesque";src:url("fonts/bricolage-latin-ext.woff2") format("woff2");font-weight:200 800;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Instrument Sans";src:url("fonts/instrument-latin.woff2") format("woff2");font-weight:400 700;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Instrument Sans";src:url("fonts/instrument-latin-ext.woff2") format("woff2");font-weight:400 700;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

:root{
  /* Layout: copy on the left, the working tool on the right, one column on phones.
     The only loud color is UV violet, reserved for hidden text. */
  --paper:#eef3f1; --sheet:#ffffff; --ink:#0e1f26; --ink-2:#4a5d66; --line:#d3ddd9;
  --rinse:#0a6f76; --rinse-ink:#ffffff; --rinse-soft:#dcefee;
  --uv:#5b2bf0; --uv-bg:#ebe4ff; --warn:#a63d0a; --warn-bg:#fdeee4; --ok:#14704a;
  --display:"Bricolage Grotesque","Hiragino Sans","Noto Sans JP","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --body:"Instrument Sans","Hiragino Sans","Noto Sans JP","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --r:14px; --shadow:0 1px 0 rgba(14,31,38,.04),0 12px 32px -12px rgba(14,31,38,.18);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0b1417; --sheet:#121e22; --ink:#e7f0ee; --ink-2:#9db1b3; --line:#243539;
  --rinse:#45c6c8; --rinse-ink:#052023; --rinse-soft:#12343a;
  --uv:#ab95ff; --uv-bg:#241b48; --warn:#ffb38a; --warn-bg:#3a2115; --ok:#6fd6a4;
  --shadow:0 12px 32px -12px rgba(0,0,0,.6); color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0b1417; --sheet:#121e22; --ink:#e7f0ee; --ink-2:#9db1b3; --line:#243539;
  --rinse:#45c6c8; --rinse-ink:#052023; --rinse-soft:#12343a;
  --uv:#ab95ff; --uv-bg:#241b48; --warn:#ffb38a; --warn-bg:#3a2115; --ok:#6fd6a4;
  --shadow:0 12px 32px -12px rgba(0,0,0,.6); color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.0625rem/1.6 var(--body)}
img,video,canvas{max-width:100%}
a{color:var(--rinse);text-underline-offset:.18em}
h1,h2,h3{font-family:var(--display);line-height:1.08;letter-spacing:-.02em;text-wrap:balance;margin:0}
h2{font-size:clamp(1.6rem,3.2vw,2.3rem);font-weight:700}
h3{font-size:1.15rem;font-weight:650;letter-spacing:-.01em;line-height:1.25}
p{margin:0}
:focus-visible{outline:3px solid var(--uv);outline-offset:2px;border-radius:6px}
[hidden]{display:none!important}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}

/* header */
.site-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px 28px;padding:18px 0}
.logo{display:flex;align-items:center;gap:10px;font:750 1.3rem/1 var(--display);letter-spacing:-.03em;color:var(--ink);text-decoration:none}
.logo svg{width:30px;height:30px}
.site-head nav{display:flex;flex-wrap:wrap;gap:4px 22px;margin-left:auto;font-size:.95rem}
.site-head nav a{color:var(--ink-2);text-decoration:none}
.site-head nav a:hover{color:var(--ink);text-decoration:underline}
.lang select{font:inherit;font-size:.95rem;color:var(--ink);background:var(--sheet);border:1px solid var(--line);border-radius:999px;padding:7px 12px}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:40px;align-items:start;padding:28px 0 56px}
.eyebrow{font-size:.9rem;font-weight:600;color:var(--rinse);margin-bottom:18px}
.hero h1{font-size:clamp(2.3rem,5.2vw,4.1rem);font-weight:800;letter-spacing:-.035em}
.lead{margin-top:22px;color:var(--ink-2);font-size:1.12rem;max-width:34em}
.hero-copy{padding-top:20px}

/* demo */
.demo{margin-top:34px}
.demo-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.demo-head h2{font-size:1.05rem;font-weight:650;letter-spacing:-.01em}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:999px;background:var(--sheet);padding:3px}
.seg button{font:600 .85rem var(--body);border:0;background:none;color:var(--ink-2);padding:6px 14px;border-radius:999px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.readers{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.reader{background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:14px 14px 16px;min-width:0}
.reader h3{font:600 .78rem var(--body);letter-spacing:.04em;text-transform:uppercase;color:var(--ink-2);margin-bottom:10px}
.page-view{font-size:.86rem;line-height:1.5;display:grid;gap:4px}
.page-view .big{font:700 1rem var(--display)}
.page-view .gap{height:2.9em;border:1px dashed transparent}
.ai-view{font:400 .78rem/1.55 var(--mono);display:grid;gap:4px;overflow-wrap:anywhere}
.uv-line{background:var(--uv-bg);color:var(--uv);border-left:3px solid var(--uv);padding:4px 8px;border-radius:0 6px 6px 0;font-weight:600;transition:opacity .35s,transform .35s}
.demo[data-view="after"] .uv-line{display:none}
.demo-caption{margin-top:12px;font-size:.9rem;color:var(--ink-2);max-width:40em}

/* tool */
.tool{background:var(--sheet);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:22px;display:grid;gap:18px;min-width:0}
.drop{display:grid;justify-items:center;gap:8px;text-align:center;border:2px dashed var(--line);border-radius:var(--r);padding:28px 16px;background:var(--paper);transition:border-color .15s,background .15s}
.tool.dragging .drop{border-color:var(--rinse);background:var(--rinse-soft)}
.drop-title{font:700 1.35rem var(--display);letter-spacing:-.02em}
.drop-or{color:var(--ink-2);font-size:.9rem}
.drop-hint{color:var(--ink-2);font-size:.86rem;max-width:30em}
.drop-note{display:inline-flex;align-items:center;gap:6px;font-size:.86rem;font-weight:600;color:var(--ok)}
.drop-note::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.src-row{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:4px}
.btn{font:650 1rem var(--body);border-radius:999px;border:1px solid transparent;padding:11px 20px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;transition:transform .06s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--rinse);color:var(--rinse-ink)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-big{width:100%;font-size:1.1rem;padding:15px 20px}
.btn-ghost{background:var(--sheet);color:var(--ink);border-color:var(--line);font-size:.9rem;padding:8px 14px}
.btn-ghost:hover{border-color:var(--ink-2)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.only-touch{display:none}
@media (pointer:coarse){.only-touch{display:inline-flex}}
.no-capture .needs-capture{display:none}

.queue{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.queue li{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:.92rem;min-width:0}
.queue .q-kind{flex:none;font:700 .68rem var(--mono);background:var(--rinse-soft);color:var(--rinse);border-radius:5px;padding:3px 6px}
.queue .q-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.queue .q-meta{flex:none;color:var(--ink-2);font-size:.82rem;font-variant-numeric:tabular-nums}
.queue button{flex:none;border:0;background:none;color:var(--ink-2);font-size:1.2rem;line-height:1;cursor:pointer;padding:4px 6px;border-radius:6px}
.queue button:hover{color:var(--warn)}
.queue-actions{display:flex;gap:8px;flex-wrap:wrap}

fieldset{border:0;margin:0;padding:0;min-width:0}
legend,.field-label{font-weight:650;font-size:.9rem;margin-bottom:8px;padding:0;display:block}
.choices{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.choice{position:relative;display:block}
.choice input{position:absolute;opacity:0;inset:0;cursor:pointer}
.choice span{display:grid;gap:2px;height:100%;border:1.5px solid var(--line);border-radius:12px;padding:11px 12px}
.choice b{font-weight:650;font-size:.95rem}
.choice small{color:var(--ink-2);font-size:.78rem;line-height:1.3}
.choice input:checked+span{border-color:var(--rinse);background:var(--rinse-soft)}
.choice input:focus-visible+span{outline:3px solid var(--uv);outline-offset:2px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pills{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px;width:fit-content;max-width:100%}
.pills label{position:relative}
.pills input{position:absolute;opacity:0;inset:0;cursor:pointer}
.pills span{display:block;padding:6px 13px;border-radius:999px;font-size:.88rem;font-weight:600;color:var(--ink-2)}
.pills input:checked+span{background:var(--ink);color:var(--paper)}
.pills input:focus-visible+span{outline:3px solid var(--uv);outline-offset:2px}
select.field{font:inherit;font-size:.95rem;width:100%;color:var(--ink);background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:9px 10px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.92rem}
.check input{width:18px;height:18px;margin-top:3px;accent-color:var(--rinse);flex:none}

.pw{display:grid;gap:8px;background:var(--warn-bg);border-radius:12px;padding:14px}
.pw-row{display:flex;gap:8px;flex-wrap:wrap}
.pw input{flex:1;min-width:140px;font:inherit;border:1px solid var(--line);border-radius:10px;padding:9px 10px;background:var(--sheet);color:var(--ink)}
.error{background:var(--warn-bg);color:var(--warn);border-radius:12px;padding:12px 14px;font-weight:600;font-size:.95rem}
.note{font-size:.88rem;color:var(--ink-2)}

.progress{display:grid;gap:10px}
.progress-text{font-weight:600;font-variant-numeric:tabular-nums}
.bar{height:10px;border-radius:999px;background:var(--rinse-soft);overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--rinse);border-radius:999px;transition:width .25s}

.result{display:grid;gap:16px}
.result-head{display:flex;gap:14px;align-items:center}
.result-head img{width:64px;height:84px;object-fit:cover;object-position:top;border:1px solid var(--line);border-radius:6px;background:#fff;flex:none}
.result-head h3{font-size:1.5rem;font-weight:750}
.result-head p{color:var(--ink-2);font-size:.92rem;font-variant-numeric:tabular-nums}
.result-actions{display:flex;flex-wrap:wrap;gap:8px}
textarea.out{width:100%;min-height:170px;resize:vertical;font:400 .82rem/1.5 var(--mono);color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:12px}
.hidden-alert{border:1.5px solid var(--uv);background:var(--uv-bg);border-radius:12px;padding:14px;display:grid;gap:8px}
.hidden-alert h4{margin:0;color:var(--uv);font:700 1rem var(--display)}
.hidden-alert ul{margin:0;padding:0;list-style:none;display:grid;gap:5px;max-height:180px;overflow:auto}
.hidden-alert li{font:500 .8rem/1.45 var(--mono);color:var(--uv);overflow-wrap:anywhere;border-left:3px solid var(--uv);padding-left:8px}
.hidden-ok{color:var(--ok);font-weight:600;font-size:.92rem}
.report{border-top:1px solid var(--line);padding-top:14px}
.report h4{margin:0 0 2px;font:650 .95rem var(--body)}
.report dl{margin:10px 0 0;display:grid;grid-template-columns:1fr auto;gap:4px 16px;font-size:.9rem}
.report dt{color:var(--ink-2)}
.report dd{margin:0;font-weight:650;font-variant-numeric:tabular-nums;text-align:right}

.capture{border:1.5px solid var(--rinse);border-radius:12px;padding:12px;display:grid;gap:10px}
.capture video{width:100%;max-height:260px;background:#000;border-radius:8px}
.capture-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.capture-count{font-size:.88rem;color:var(--ink-2);margin-left:auto}

.tool[data-state="idle"] .when-ready,.tool[data-state="idle"] .when-busy,.tool[data-state="idle"] .when-done,
.tool[data-state="ready"] .when-busy,.tool[data-state="ready"] .when-done,
.tool[data-state="busy"] .when-idle,.tool[data-state="busy"] .when-done,.tool[data-state="busy"] .when-edit,
.tool[data-state="done"] .when-idle,.tool[data-state="done"] .when-busy,.tool[data-state="done"] .when-edit{display:none}
.tool[data-state="ready"] .drop{padding:14px}
.tool[data-state="ready"] .drop-title{font-size:1.05rem}
.tool[data-state="ready"] .drop-hint,.tool[data-state="ready"] .drop-or{display:none}

/* sections */
section.block{padding:56px 0;border-top:1px solid var(--line)}
.block-head{max-width:40em;margin-bottom:28px}
.block-head p{color:var(--ink-2);margin-top:10px}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;counter-reset:s;list-style:none;margin:0;padding:0}
.steps li{counter-increment:s;display:grid;gap:8px;align-content:start}
.steps li::before{content:counter(s);font:800 2.6rem/1 var(--display);color:var(--rinse)}
.steps p,.cards p,.faq p{color:var(--ink-2)}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px}
.ticks,.crosses{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.ticks li,.crosses li{padding-left:30px;position:relative;color:var(--ink-2)}
.ticks strong,.crosses strong{color:var(--ink)}
.ticks li::before,.crosses li::before{position:absolute;left:0;top:.1em;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;font:700 .75rem var(--body)}
.ticks li::before{content:"✓";background:var(--rinse-soft);color:var(--rinse)}
.crosses li::before{content:"!";background:var(--warn-bg);color:var(--warn)}
.students{background:var(--sheet);border:1px solid var(--line);border-radius:22px;padding:30px;display:grid;gap:12px}
.students p{color:var(--ink-2);max-width:46em}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.cards>div{display:grid;gap:8px;align-content:start;border-top:3px solid var(--ink);padding-top:14px}
.faq{display:grid;gap:0;max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font:650 1.08rem var(--display);letter-spacing:-.01em;list-style-position:outside}
.faq details p{margin-top:10px;max-width:42em}
.ad-slot{margin:8px auto 40px;max-width:970px;text-align:center}
.ad-slot small{display:block;color:var(--ink-2);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px}

.site-foot{border-top:1px solid var(--line);padding:32px 0 48px;display:grid;gap:14px;font-size:.92rem;color:var(--ink-2)}
.site-foot .foot-tag{font:700 1.25rem var(--display);color:var(--ink);letter-spacing:-.02em}
.foot-links{display:flex;flex-wrap:wrap;gap:6px 20px}
.foot-links a{color:var(--ink-2)}

/* text pages */
.doc{max-width:720px;padding:24px 0 64px}
.doc h1{font-size:clamp(2rem,4vw,2.8rem);font-weight:800;margin-bottom:8px}
.doc h2{font-size:1.35rem;margin:34px 0 10px}
.doc p,.doc li{color:var(--ink-2)}
.doc p+p{margin-top:12px}
.doc ul{padding-left:1.2em;display:grid;gap:6px}
.doc .meta{font-size:.9rem}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:26px;padding-top:8px}
  .hero-copy{padding-top:0;display:contents}
  .hero-text{order:1}.tool{order:2}.demo{order:3;margin-top:0}
  .steps,.two{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr 1fr}
  .site-head nav{display:none}
  .lang{margin-left:auto}
}
@media (max-width:520px){
  .choices,.row,.readers,.cards{grid-template-columns:1fr}
  .tool{padding:16px;border-radius:18px}
  section.block{padding:40px 0}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.tool[data-state="busy"] .when-ready,.tool[data-state="done"] .when-ready{display:none}