/* Futuristic dark theme */
:root{color-scheme:dark}
:root{--bg:#070b14;--bg2:#0d1424;--fg:#e9eefb;--muted:#9aa6c0;--card:rgba(255,255,255,.045);--card-solid:#0f1729;--line:rgba(140,170,255,.18);--accent:#5ee1ff;--accent2:#8b7bff;--accent-fg:#04101a;--warn:rgba(255,200,80,.10);--warn-line:rgba(255,200,80,.45);--glow:0 0 0 1px rgba(94,225,255,.25),0 10px 40px -10px rgba(94,225,255,.35)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--accent)}
.wrap{max-width:820px;margin:0 auto;padding:0 16px}
header.site{background:var(--card);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;justify-content:space-between;align-items:center;padding-top:12px;padding-bottom:12px;gap:12px;flex-wrap:wrap}
.brand{font-weight:700;text-decoration:none;color:var(--fg)}
.tag{font-size:.8rem;color:var(--muted)}
h1{font-size:clamp(1.7rem,5vw,2.3rem);line-height:1.25;margin:1.4rem 0 .6rem}
h2{font-size:1.5rem;margin:2.4rem 0 .6rem;line-height:1.3}
h3{font-size:1.15rem;margin:1.6rem 0 .4rem}
.lead{color:var(--muted);font-size:1.05rem}
.meta{font-size:.9rem;color:var(--muted)}
.cta{display:block;text-align:center;background:var(--accent);color:var(--accent-fg);font-weight:700;text-decoration:none;padding:14px 18px;border-radius:10px;margin:1rem 0}
.cta:hover{filter:brightness(1.08)}
.note{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:12px 16px;margin:1rem 0}
.note.warn{background:var(--warn);border-color:var(--warn-line);border-left-color:var(--warn-line)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 16px}
.toc ul{margin:.3rem 0 0;padding-left:1.2rem}
table{border-collapse:collapse;width:100%;background:var(--card);margin:1rem 0}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{width:34%}
figure{margin:1.2rem 0}
figure button{display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:none;cursor:zoom-in}
figure img{display:block;width:100%;height:auto}
figcaption{font-size:.9rem;color:var(--muted);margin-top:.4rem}
.figure-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;align-items:start}
.figure-grid figure{margin:.4rem 0}
.tour-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
details{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:.6rem 0}
summary{cursor:pointer;font-weight:600}
code{background:var(--card);border:1px solid var(--line);border-radius:4px;padding:1px 5px;font-size:.92em;word-break:break-all}
.adslot{margin:2.5rem 0;overflow:hidden}
.adlabel{margin:0 0 4px;font-size:.75rem;color:var(--muted);text-align:center;letter-spacing:.05em;text-transform:uppercase}
footer.site{margin-top:3rem;background:var(--card);border-top:1px solid var(--line);padding:24px 0;font-size:.9rem;color:var(--muted)}
footer.site nav a{margin-right:14px;display:inline-block}
dialog{border:0;padding:0;background:transparent;max-width:96vw;max-height:96vh}
dialog::backdrop{background:rgba(0,0,0,.8)}
dialog img{display:block;max-width:96vw;max-height:90vh;width:auto;height:auto;border-radius:6px}
dialog button{display:block;margin:8px auto 0;padding:8px 20px;font-size:1rem;border-radius:8px;border:0;cursor:pointer}
@media (max-width:620px){.figure-grid,.tour-grid{grid-template-columns:1fr}}
@media (max-width:480px){body{font-size:16px}}

body{background:radial-gradient(1100px 520px at 12% -8%,rgba(94,225,255,.16),transparent 60%),radial-gradient(900px 480px at 100% 0,rgba(139,123,255,.16),transparent 55%),var(--bg);background-attachment:fixed;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
header.site{position:sticky;top:0;z-index:20;background:rgba(7,11,20,.6);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em}
.brand::before{content:"";width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 0 14px var(--accent)}
.hnav a{margin-left:16px;font-size:.85rem;color:var(--muted);text-decoration:none}.hnav a:hover{color:var(--accent)}
h1{font-weight:800;letter-spacing:-.02em;background:linear-gradient(100deg,var(--fg) 30%,var(--accent) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
h2{letter-spacing:-.01em;padding-top:.4rem;border-top:1px solid var(--line)}
a{text-underline-offset:3px}
.cta{background:linear-gradient(100deg,var(--accent),var(--accent2));color:var(--accent-fg);box-shadow:var(--glow);transition:transform .15s,filter .15s}
.cta:hover{transform:translateY(-2px)}
.note,.toc,details,table,figure button{background:var(--card);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-color:var(--line);border-radius:14px}
.note{border-left:3px solid var(--accent)}
table{border-radius:14px;overflow:hidden;border-collapse:separate;border-spacing:0}
th,td{border:0;border-bottom:1px solid var(--line)}tr:last-child th,tr:last-child td{border-bottom:0}
code{background:rgba(94,225,255,.10);border-color:var(--line)}
footer.site{background:rgba(7,11,20,.5);margin-top:4rem}
footer.site nav a{color:var(--fg);text-decoration:none;margin-right:18px;opacity:.85}footer.site nav a:hover{color:var(--accent);opacity:1}
/* info pages */
.page-hero{padding:2.2rem 0 .4rem}
.eyebrow{display:inline-block;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);border:1px solid var(--line);border-radius:999px;padding:3px 12px;background:var(--card)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:1.2rem 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 18px;backdrop-filter:blur(8px)}
.card h3{margin:.2rem 0 .3rem;font-size:1.02rem}.card p{margin:0;color:var(--muted);font-size:.95rem}
.legal h2{font-size:1.2rem;margin-top:2rem}
.legal li{margin:.25rem 0}
.btn{display:inline-block;padding:10px 18px;border-radius:10px;border:1px solid var(--line);text-decoration:none;font-weight:600;background:var(--card)}
.btn:hover{border-color:var(--accent);box-shadow:var(--glow)}

/* Enlarged view: phones get a scrollable, larger image so small text stays readable */
dialog{overflow:auto}
dialog img{touch-action:pan-x pan-y pinch-zoom}
@media (max-width:620px){dialog{max-height:92vh}dialog img{max-width:none;max-height:none;width:180vw}}

.disclosure h2{font-size:1.2rem;margin:0 0 .6rem;border-top:0;padding-top:0}
.disclosure table{margin:.4rem 0}
.disclosure th{width:30%}

/* ---- Layout with sidebar ---- */
.layout{max-width:1100px;margin:0 auto;padding:0 16px;display:grid;grid-template-columns:minmax(0,1fr);gap:28px}
@media (min-width:980px){.layout{grid-template-columns:minmax(0,1fr) 290px;gap:40px}.toc-mobile{display:none}}
.layout article{min-width:0;max-width:760px}
.sidebar{min-width:0}
@media (min-width:980px){.sidebar{position:sticky;top:76px;align-self:start;max-height:calc(100vh - 96px);overflow:auto}}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:0 0 14px;backdrop-filter:blur(8px)}
.side-box h2{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 .5rem;border:0;padding:0}
.side-box ul{list-style:none;margin:0;padding:0}
.side-box li{margin:.15rem 0}
.side-box a{text-decoration:none;font-size:.95rem;display:block;padding:3px 0}
.side-box a:hover,.side-box a[aria-current="page"]{color:var(--fg)}
.side-box a[aria-current="page"]{font-weight:700}
.side-box p{font-size:.88rem;color:var(--muted);margin:.2rem 0 .5rem}
.toc-mobile{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:8px 14px;margin:1rem 0}
.toc-mobile ul{margin:.4rem 0;padding-left:1.2rem}
/* ---- Useful-page components ---- */
.quick{background:linear-gradient(135deg,rgba(94,225,255,.10),rgba(139,123,255,.10));border:1px solid var(--line);border-radius:16px;padding:14px 18px;margin:1.2rem 0}
.quick h2{font-size:1.1rem;margin:0 0 .4rem;border:0;padding:0}
.quick ol{margin:.3rem 0 0;padding-left:1.3rem}
.textlink{font-size:1rem;margin:.8rem 0}
.tool{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 18px;margin:1rem 0}
.tool label{display:block;font-weight:600;margin:.4rem 0 .2rem}
.tool input[type=text],.tool input[type=number]{width:100%;max-width:260px;padding:10px 12px;font-size:1rem;border-radius:10px;border:1px solid var(--line);background:var(--card-solid);color:var(--fg)}
.tool button.go{margin-top:.7rem;padding:10px 18px;border-radius:10px;border:0;font-weight:700;cursor:pointer;background:linear-gradient(100deg,var(--accent),var(--accent2));color:var(--accent-fg)}
.result{margin-top:.8rem;padding:10px 14px;border-radius:10px;border:1px solid var(--line);display:none}
.result.ok{display:block;border-color:rgba(80,220,140,.6);background:rgba(80,220,140,.10)}
.result.ng{display:block;border-color:var(--warn-line);background:var(--warn)}
.checklist{list-style:none;padding:0;margin:.6rem 0}
.checklist li{margin:.35rem 0}
.checklist label{display:flex;gap:10px;align-items:flex-start;font-weight:500;cursor:pointer}
.checklist input{margin-top:.35rem;width:18px;height:18px;flex:none}
.progress{font-size:.9rem;color:var(--muted)}
.table-wrap{overflow-x:auto}
.table-wrap table{min-width:520px}
.table-wrap th{width:auto}
.steps{counter-reset:s;list-style:none;padding:0}
.steps>li{counter-increment:s;position:relative;padding-left:46px;margin:1rem 0}
.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));color:var(--accent-fg);font-weight:800;display:grid;place-items:center}
dl.gloss dt{font-weight:700;margin-top:1rem}
dl.gloss dd{margin:.2rem 0 0;color:var(--muted)}
.hnav{display:flex;flex-wrap:wrap}
.has-layout header.site .wrap,.has-layout footer.site .wrap{max-width:1100px}

.tool input[type=email],.tool select,.tool textarea{width:100%;max-width:520px;padding:10px 12px;font-size:1rem;border-radius:10px;border:1px solid var(--line);background:var(--card-solid);color:var(--fg);font-family:inherit}
.tool .check{display:flex;gap:10px;align-items:flex-start;font-weight:500;margin-top:.8rem}
.tool .check input{width:18px;height:18px;margin-top:.3rem;flex:none;max-width:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---- Form v2: larger, balanced fields ---- */
form.tool{padding:24px 26px;max-width:none}
form.tool .formgrid{display:grid;grid-template-columns:minmax(0,1fr);gap:0 20px}
@media (min-width:720px){form.tool .formgrid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
form.tool label{display:block;margin:1.2rem 0 .45rem;font-weight:600}
form.tool .check{display:flex;margin-top:1.4rem}
form.tool input[type=text],form.tool input[type=email],form.tool select,form.tool textarea{
  display:block;width:100%;max-width:none;box-sizing:border-box;min-height:54px;padding:14px 16px;font-size:1.05rem;line-height:1.5;
  border-radius:12px;border:1px solid var(--line);background:var(--card-solid);color:var(--fg);font-family:inherit;-webkit-appearance:none;appearance:none}
form.tool textarea{min-height:240px;resize:vertical;padding-top:14px}
form.tool select{padding-right:44px;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'><path d='M1 1l6 6 6-6' fill='none' stroke='%239aa6c0' stroke-width='2' stroke-linecap='round'/></svg>");background-repeat:no-repeat;background-position:right 16px center}
form.tool input:focus,form.tool select:focus,form.tool textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
form.tool .check input{width:20px;height:20px;margin-top:.25rem;flex:none}
form.tool button.go{margin-top:1.4rem;padding:15px 34px;font-size:1.05rem;border-radius:12px}
form.tool .progress{margin-top:1.2rem}
.hp{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;overflow:hidden!important}
h2[id],h3[id]{scroll-margin-top:84px}