:root{color-scheme:dark;font-family:system-ui,sans-serif;color:#edf2f2;background:#111719;font-size:16px}*{box-sizing:border-box}body{margin:0}main{max-width:800px;margin:auto;padding:36px 24px 48px}header,.row,.actions{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}header{border-bottom:1px solid #354146;padding-bottom:24px;margin-bottom:34px}.brand{font-weight:850;font-size:32px;letter-spacing:-1.5px;text-decoration:none;color:#edf2f2}.brand span{color:#ffc35a}.tag{font-size:14px;letter-spacing:2px;color:#afbec3}h1{font-size:clamp(27px,5vw,36px);letter-spacing:-.8px;line-height:1.2;margin:0 0 14px}h2{font-size:20px;margin:0}p{line-height:1.55;color:#bdc9cd}.intro{max-width:650px;margin-bottom:30px}.card{border:1px solid #3b494e;border-radius:14px;background:#1d272b;padding:24px;margin:16px 0}.badge{font-size:14px;padding:6px 10px;border:1px solid #536167;border-radius:20px;white-space:nowrap}.badge.connected{color:#8fe1b3;border-color:#418263;background:#193c2d}button{font:600 16px system-ui;padding:13px 18px;border:1px solid #718087;border-radius:8px;background:#263337;color:#eef4f5;cursor:pointer;min-height:48px;min-width:120px}button:hover:not(:disabled){background:#35474d}button.primary{color:#171b1b;background:#ffc35a;border-color:#ffc35a}button.primary:hover:not(:disabled){background:#ffd389}button:disabled{color:#879397;border-color:#435158;background:#202a2e;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:3px solid #8dcafb;outline-offset:4px}.actions{justify-content:flex-start}dl{margin:24px 0 0;border-top:1px solid #435158}dl div{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid #344348;padding:12px 0}dt{color:#b8c8ce}dd{margin:0;text-align:right;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.options{display:flex;flex-wrap:wrap;gap:8px;padding:0;list-style:none}.options li{background:#18432f;color:#a2edc4;border:1px solid #397b57;padding:7px 11px;border-radius:6px;font-size:14px}#status{min-height:50px;overflow-wrap:anywhere}#status.error{color:#ffb6ac}progress{width:100%;margin-top:18px;accent-color:#ffc35a}footer{font-size:14px;color:#aebdc4;line-height:1.7;margin-top:24px}a{color:#a9d8ff}dialog{max-width:560px;background:#1d272b;color:#eef4f5;border:1px solid #718087;border-radius:12px;padding:24px}dialog::backdrop{background:#000a}@media(max-width:500px){main{padding:24px 14px}.card{padding:18px}.row{gap:12px}.actions button{flex:1}dl div{display:block}dd{text-align:left;margin-top:4px}.tag{font-size:12px}}
textarea{width:100%;display:block;margin:10px 0 16px;border:1px solid #718087;border-radius:8px;padding:14px;background:#111719;color:#edf2f2;font:14px/1.5 ui-monospace,monospace;resize:vertical;min-height:220px}textarea:focus-visible{outline:3px solid #8dcafb;outline-offset:3px}li{line-height:1.6;margin:8px 0}label{color:#bdc9cd;font-size:14px}
#id-choice{display:block;max-width:100%;margin:8px 0 12px;padding:12px;background:#263337;color:#edf2f2;border:1px solid #718087;border-radius:8px;font:inherit}
#id-log{min-height:110px;max-height:260px}#id-log[hidden]{display:none}
#blank-type{display:block;margin:8px 0 12px}.installer label[for="blank-type"]{display:block;margin-top:10px}
.notice{margin-top:20px;border-left:3px solid #ffc35a;padding:2px 0 2px 16px;overflow-wrap:anywhere}.notice h3{font-size:18px;color:#ffc35a}.notice h3:focus-visible{outline:3px solid #8dcafb;outline-offset:4px}
input[type=password],.installer input[type=text]{display:block;width:100%;margin:10px 0 16px;padding:13px;font:16px system-ui;color:#edf2f2;background:#111719;border:1px solid #718087;border-radius:8px}input[type=checkbox]{width:20px;height:20px;vertical-align:middle;margin-right:8px}summary{cursor:pointer}#identity{overflow-wrap:anywhere}

/* Desktop workspace: keep the three installation stages in view, not a phone column. */
.usb-monitor{position:sticky;top:6px;z-index:5;padding:10px 14px;margin:8px 0 12px;border:1px solid #617278;border-left:4px solid #94aab3;border-radius:8px;background:#162328;box-shadow:0 4px 12px #0005;overflow-wrap:anywhere}
.usb-monitor-row{display:flex;align-items:baseline;gap:8px 18px;flex-wrap:wrap}
.installer .usb-monitor h2{font-size:14px;margin:0;color:#c2d0d5}
.usb-monitor strong{font-size:15px}
.usb-monitor #usb-elapsed{font-variant-numeric:tabular-nums;font-size:13px;color:#c2d0d5;margin-left:auto}
.installer .usb-monitor p{font-size:13px;line-height:1.35;margin:5px 0 0}
.usb-monitor[data-tone="success"]{border-left-color:#70dda6}.usb-monitor[data-tone="success"] strong{color:#90e9b9}
.usb-monitor[data-tone="waiting"],.usb-monitor[data-tone="warning"]{border-left-color:#ffc35b}.usb-monitor[data-tone="waiting"] strong,.usb-monitor[data-tone="warning"] strong{color:#ffd17c}
.usb-monitor[data-tone="error"]{border-left-color:#ff8181}.usb-monitor[data-tone="error"] strong{color:#ffa4a4}
@media(max-width:600px){.usb-monitor{padding:8px 10px}.usb-monitor-row{gap:5px 10px}.usb-monitor-row h2{width:100%}}
/* Keep focused controls below the sticky status when keyboard navigation scrolls. */
.installer button,.installer input,.installer select,.installer summary{scroll-margin-top:200px}
.header-tools{display:flex;align-items:center;justify-content:flex-end;gap:20px;flex-wrap:wrap}
.language-control{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.language-control select{font:inherit;color:#edf2f2;background:#263337;border:1px solid #718087;border-radius:8px;min-height:44px;padding:8px 30px 8px 12px;max-width:100%;cursor:pointer}
.language-control select:focus-visible{outline:3px solid #8dcafb;outline-offset:3px}
@media(max-width:600px){.header-tools{width:100%;justify-content:space-between;gap:12px}.language-control select{min-height:48px}}
.desktop-layout main{max-width:1760px;padding:22px 28px 26px}
.desktop-layout code{overflow-wrap:anywhere}
.desktop-layout header{margin-bottom:18px;padding-bottom:14px}
.desktop-layout .intro{max-width:none;margin:0 0 14px}
.steps-grid,.guide-grid{display:grid;gap:14px;align-items:start}
.steps-grid>.card,.guide-grid>.card{margin:0;min-width:0}
.installer .card{padding:16px;margin:12px 0}
.installer .steps-grid>.card{margin:0}
.installer h2{font-size:19px}
.installer p{margin:9px 0;line-height:1.45}
.installer .safety{border-color:#8a713e}
.installer .safety label{display:block;color:#edf2f2}
.installer .board-guide{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;font-size:12px}
.installer #board{padding:4px;min-height:32px;width:auto;max-width:100%}
.installer #board+div{margin:4px 0}
.installer .safety-heading,.installer .board-selector{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.installer .safety-heading h2{margin:0}
.installer .safety .board-selector label{margin:0}
.installer #install-all{margin-top:10px}
@media(max-width:800px){.installer .board-guide{grid-template-columns:1fr;gap:0}}
.installer .actions,.installer .diagnostic-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:10px 0}
.installer button{min-width:0;width:100%;font-size:14px;min-height:44px;padding:9px 10px;line-height:1.3}
.installer #code{margin:6px 0 10px;min-height:44px;padding:9px}
.installer .notice{padding-left:10px;font-size:14px}
.installer details{font-size:14px;line-height:1.45}
.installer summary{color:#aad7ef;padding:3px 0}
.installer .progress-panel{border:1px solid #536167;background:#141e21;border-radius:8px;padding:12px;margin:12px 0}
.installer #status{min-height:0;margin:0}
.installer progress{margin-top:8px;height:8px;display:block}
.installer footer{margin-top:12px;font-size:12px}
.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.guide-grid .card{padding:20px}
.guide-grid li{line-height:1.5;margin:8px 0}
/* Desktop updater: actions stay together; secondary instructions are disclosed. */
.updater main{max-width:1700px;container-type:inline-size}
.updater-nav{display:flex;gap:20px;flex-wrap:wrap;margin:14px 0 20px;font-size:14px}
.updater-grid,.updater-extras{display:grid;gap:16px;align-items:start}
.updater-grid>.card,.updater-extras>.card{margin:0;min-width:0}
.updater-extras{margin-top:16px}
.updater summary h2{display:inline;font-size:16px}
.updater .muted{font-size:13px;color:#aabcc3}
.updater .diagnostic-actions{margin-top:12px}
.updater .actions{gap:10px}
.updater .actions button{flex:1;min-width:120px}
.updater #registration-report{min-height:155px}
@media(min-width:1050px){
  .updater{font-size:14px}
  .updater main{padding:18px 24px}
  .updater header{padding-bottom:12px;margin-bottom:18px}
  .updater h1{font-size:30px;margin-bottom:8px}
  .updater h2{font-size:18px}
  .updater .card{padding:18px}
  .updater button{font-size:14px;padding:10px 12px}
  .updater #status{min-height:72px}
  .updater dl{margin-top:16px}
  .updater dl div{padding:9px 0}
  .updater footer{font-size:12px;margin-top:18px}
}
/* Use actual available content width, including browser/accessibility zoom. */
@container(min-width:1000px){
  .updater-grid{grid-template-columns:minmax(360px,1.3fr) minmax(260px,.85fr) minmax(280px,1fr)}
  .updater-extras{grid-template-columns:1fr 1fr}
}
@media(min-width:1150px){
  .steps-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .installer{font-size:14px}
  .installer main{padding:10px 24px 12px}
  .installer h1{font-size:28px;margin-bottom:8px}
  .installer header{margin-bottom:8px;padding-bottom:8px}
  .installer .brand{font-size:28px}
  .installer footer{line-height:1.4;margin-top:8px}
  .installer .safety h2{font-size:16px}
  .installer .safety p{margin:5px 0}
  .installer .safety{padding:8px 12px}
  .installer .card{padding:12px;margin:8px 0}
  .installer .step p{margin:5px 0;line-height:1.4}
  .installer .step button{padding:6px 8px}
  .installer .progress-panel{padding:10px;margin:8px 0}
  .installer .intro{margin-bottom:8px}
  .installer .safety p{margin:3px 0}
  .installer .usb-monitor{margin:6px 0 8px;padding:8px 12px}
  .installer .step .actions,.installer .step .diagnostic-actions{margin:8px 0}
}
@media(max-width:750px){
  .desktop-layout main{padding:22px 14px}
  .guide-grid{grid-template-columns:1fr}
  .installer .progress-panel{position:static}
  .installer button{min-height:48px}
}
.options li{border-radius:999px;max-width:100%;overflow-wrap:anywhere}
.options li[hidden]{display:none}
.cluster-type{color:#a2edc4;font-size:14px;line-height:1.5;overflow-wrap:anywhere;margin:6px 0 0}
.cluster-type[hidden]{display:none}
/* Public updater polish: short, restrained transitions, no moving USB controls. */
html:has(.updater),html:has(body[data-transition="yes"]){scroll-behavior:smooth;scroll-padding-top:20px}
.updater,body[data-transition="yes"]{background:radial-gradient(ellipse at 12% 0%,#26363888,transparent 55%),#101718}
.updater .card,body[data-transition="yes"] .card{box-shadow:0 12px 30px #00000030,inset 0 1px #ffffff06;transition:border-color .2s,box-shadow .2s;animation:canbox-appear .4s ease-out both}
.updater-grid>.card:nth-child(2){animation-delay:50ms}.updater-grid>.card:nth-child(3){animation-delay:100ms}.updater-grid>.card:nth-child(4){animation-delay:150ms}
.updater button,body[data-transition="yes"] button,.updater-nav a{box-shadow:0 4px 10px #00000025;transition:background-color .18s,border-color .18s,box-shadow .18s}
.updater button:enabled:hover,body[data-transition="yes"] button:enabled:hover,.updater-nav a:hover{box-shadow:0 6px 18px #00000045;border-color:#e7bb62}
.updater button:enabled:active,body[data-transition="yes"] button:enabled:active{box-shadow:inset 0 2px 6px #00000045}
.updater-nav a{display:inline-flex;padding:9px 14px;border:1px solid #536167;border-radius:999px;text-decoration:none;background:#202d30}
.updater .options{gap:8px}.updater .options li{box-shadow:0 3px 8px #00000020}
.updater .updater-extras{grid-template-columns:minmax(0,1fr)}
.updater details[open]>:not(summary),body[data-transition="yes"] details[open]>:not(summary){animation:canbox-appear .2s ease-out}
@keyframes canbox-appear{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){html:has(.updater),html:has(body[data-transition="yes"]){scroll-behavior:auto}.updater *,body[data-transition="yes"] *{animation:none!important;transition:none!important}}