:root{
    --bg:#0b0d10;
    --panel:#12171d;
    --panel-2:#171e26;
    --panel-3:#1d252e;
    --line:#303945;
    --line-strong:#465363;
    --text:#f6f8fb;
    --muted:#a9b4c1;
    --dim:#768391;
    --rust:#c0623a;
    --rust-2:#e58a5c;
    --blue:#72b8ff;
    --green:#6be092;
    --amber:#ffd166;
    --red:#ff6b6b;
    --ink:#071016;
    --radius:8px;
    --shadow:0 16px 60px rgba(0,0,0,.32);
    --mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;
    --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    --fast:120ms;
    --med:180ms;
    --ease:cubic-bezier(.2,.8,.2,1);
    --press:cubic-bezier(.2,0,0,1);
    --calc-hero:#17212b;
    --calc-hero-deep:#0d131a;
    --calc-hero-text:#fffaf4;
    --calc-hero-muted:#d9d4cc;
    --calc-hero-accent:#f0a46f;
    --calc-hero-line:rgba(255,250,244,.18);
    --card-accent:var(--av-accent);
    --card-accent-soft:var(--av-accent-soft);
    --card-accent-line:var(--av-accent-line);
  }

  *{box-sizing:border-box}
  html,body{min-height:100%}
  body{
    margin:0;
    background:
      radial-gradient(circle at 16% -12%,rgba(192,98,58,.18),transparent 30rem),
      linear-gradient(180deg,#0b0d10 0%,#11161b 52%,#080a0d 100%);
    color:var(--text);
    font-family:var(--sans);
    line-height:1.45;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background:
      repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 80px),
      repeating-linear-gradient(0deg,rgba(255,255,255,.025) 0 1px,transparent 1px 80px);
    mask-image:linear-gradient(180deg,rgba(0,0,0,.8),rgba(0,0,0,.12));
  }
  a{color:inherit}
  button,input,select{
    font:inherit;
  }
  button{
    min-height:44px;
    border:1px solid var(--line);
    border-radius:var(--radius);
    background:var(--panel-2);
    color:var(--text);
    padding:9px 12px;
    cursor:pointer;
    user-select:none;
    -webkit-tap-highlight-color:transparent;
    transition:
      transform var(--fast) var(--press),
      border-color var(--fast) var(--ease),
      background var(--fast) var(--ease),
      box-shadow var(--fast) var(--ease),
      color var(--fast) var(--ease);
    touch-action:manipulation;
  }
  button:hover{
    border-color:var(--line-strong);
    background:var(--panel-3);
    transform:translateY(-1px);
    box-shadow:0 8px 22px rgba(0,0,0,.18);
  }
  button:active,
  button.is-pressing{
    transform:translateY(1px) scale(.975);
    box-shadow:inset 0 2px 5px rgba(0,0,0,.28);
  }
  button.primary{
    background:linear-gradient(180deg,var(--rust-2),var(--rust));
    border-color:var(--rust);
    color:#140905;
    font-weight:800;
  }
  button:focus-visible,
  input:focus-visible,
  select:focus-visible,
  a:focus-visible{
    outline:2px solid var(--blue);
    outline-offset:3px;
  }
  input,select{
    width:100%;
    min-height:44px;
    border:1px solid var(--line);
    border-radius:var(--radius);
    background:#0e1318;
    color:var(--text);
    padding:9px 10px;
    transition:border-color var(--fast) var(--ease),background var(--fast) var(--ease),box-shadow var(--fast) var(--ease);
  }
  input:hover,
  input:focus,
  select:hover,
  select:focus{
    border-color:var(--line-strong);
    background:#111821;
  }
  input::placeholder{color:var(--dim)}

  .skip-link{
    position:absolute;
    top:12px;
    left:12px;
    z-index:1000;
    background:var(--text);
    color:var(--ink);
    padding:10px 14px;
    border-radius:var(--radius);
    transform:translateY(-150%);
    transition:transform var(--med) var(--ease);
  }
  .skip-link:focus-visible{transform:translateY(0)}
  .sr-only{
    position:absolute;
    width:1px;
    height:1px;
    padding:0;
    margin:-1px;
    overflow:hidden;
    clip:rect(0,0,0,0);
    white-space:nowrap;
    border:0;
  }

  .app{
    position:relative;
    z-index:1;
    min-height:100vh;
  }
  .topbar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:14px 18px;
    border-bottom:1px solid rgba(255,255,255,.08);
    background:rgba(11,13,16,.88);
    backdrop-filter:blur(18px);
    position:sticky;
    top:0;
    z-index:30;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:12px;
    text-decoration:none;
  }
  .brand-mark{
    width:38px;
    height:38px;
    border:1px solid rgba(255,255,255,.24);
    border-radius:50%;
    display:grid;
    place-items:center;
    font-family:Georgia,serif;
    font-size:19px;
    color:var(--rust-2);
    background:#11161c;
  }
  .brand-text{
    display:flex;
    flex-direction:column;
    gap:1px;
  }
  .brand-text strong{
    font-size:14px;
    letter-spacing:.08em;
    text-transform:uppercase;
  }
  .brand-text span{
    color:var(--muted);
    font-family:var(--mono);
    font-size:11px;
  }
  .top-actions{
    display:flex;
    align-items:center;
    justify-content:flex-end;
    gap:10px;
    flex-wrap:wrap;
  }
  .top-link{
    color:var(--text-2);
    font-family:var(--mono);
    font-size:12.5px;
    letter-spacing:.04em;
    text-transform:uppercase;
    text-decoration:none;
    transition:color var(--fast) var(--ease);
  }
  .top-link:hover{color:var(--text)}

  main{
    width:100%;
    max-width:1480px;
    margin:0 auto;
    padding:22px 18px 34px;
  }
  .hero{
    position:relative;
    isolation:isolate;
    overflow:hidden;
    margin-bottom:18px;
    padding:clamp(22px,3vw,38px);
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:18px;
    align-items:end;
    background:
      radial-gradient(circle at 84% 12%,rgba(114,184,255,.18),transparent 24rem),
      linear-gradient(135deg,var(--calc-hero) 0%,var(--calc-hero-deep) 72%);
    background-color:var(--calc-hero-deep);
    border:1px solid var(--calc-hero-line);
    border-radius:18px;
    box-shadow:var(--shadow);
  }
  .hero::before{
    content:"";
    position:absolute;
    z-index:-1;
    inset:0;
    background:
      repeating-linear-gradient(90deg,rgba(255,255,255,.045) 0 1px,transparent 1px 52px),
      repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 52px);
    mask-image:linear-gradient(90deg,#000,transparent 72%);
  }
  .hero::after{
    content:"";
    position:absolute;
    z-index:-1;
    width:260px;
    height:260px;
    right:-96px;
    bottom:-190px;
    border:34px solid rgba(240,164,111,.16);
    border-radius:50%;
  }
  .hero-copy{min-width:0}
  .hero .eyebrow{
    margin:0 0 10px;
    color:var(--calc-hero-accent);
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.12em;
    text-transform:uppercase;
  }
  h1{
    margin:0;
    color:var(--calc-hero-text);
    font-size:clamp(34px,5vw,64px);
    line-height:1.02;
    letter-spacing:-.05em;
  }
  .hero p{
    max-width:760px;
    margin:12px 0 0;
    color:var(--calc-hero-muted);
    font-size:15px;
  }
  .hero-signals{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin:18px 0 0;
    padding:0;
    list-style:none;
  }
  .hero-signals li{
    display:inline-flex;
    align-items:center;
    gap:7px;
    min-height:28px;
    padding:5px 9px;
    border:1px solid var(--calc-hero-line);
    border-radius:999px;
    background:rgba(255,255,255,.055);
    color:var(--calc-hero-muted);
    font-family:var(--mono);
    font-size:10px;
    letter-spacing:.07em;
    text-transform:uppercase;
  }
  .hero-signals li::before{
    content:"";
    width:6px;
    height:6px;
    flex:0 0 auto;
    border-radius:50%;
    background:var(--calc-hero-accent);
    box-shadow:0 0 0 3px rgba(240,164,111,.13);
  }
  .hero-actions{
    display:flex;
    align-items:center;
    justify-content:flex-end;
    gap:8px;
    flex-wrap:wrap;
  }

  .grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:18px;
  }
  .calc-card,
  .summary-panel{
    position:relative;
    isolation:isolate;
    background:var(--av-surface);
    border:1px solid var(--av-line);
    border-radius:14px;
    box-shadow:var(--shadow);
    overflow:hidden;
  }
  html[data-av-tool="av-calculator"] .calc-card,
  html[data-av-tool="av-calculator"] .summary-panel{
    background:
      linear-gradient(150deg,var(--card-accent-soft),transparent 13rem),
      var(--av-surface);
    border-color:var(--av-line);
  }
  .calc-card::before,
  .summary-panel::before{
    content:"";
    position:absolute;
    z-index:2;
    inset:0 0 auto;
    height:4px;
    background:var(--card-accent);
  }
  .calc-card::after,
  .summary-panel::after{
    content:"";
    position:absolute;
    z-index:-1;
    width:120px;
    height:120px;
    right:-72px;
    top:-72px;
    border:20px solid var(--card-accent-soft);
    border-radius:50%;
  }
  #audioCard{
    --card-accent:var(--av-focus);
    --card-accent-soft:var(--av-focus-soft);
    --card-accent-line:var(--av-focus-line);
  }
  #projectionCard{
    --card-accent:var(--av-warning);
    --card-accent-soft:var(--av-warning-soft);
    --card-accent-line:var(--av-warning-line);
  }
  #storageCard{
    --card-accent:var(--av-success);
    --card-accent-soft:var(--av-success-soft);
    --card-accent-line:var(--av-success-line);
  }
  #powerCard{
    --card-accent:var(--av-accent);
    --card-accent-soft:var(--av-accent-soft);
    --card-accent-line:var(--av-accent-line);
  }
  #voltageDropCard{
    --card-accent:var(--av-danger);
    --card-accent-soft:var(--av-danger-soft);
    --card-accent-line:var(--av-danger-line);
  }
  #splCard{
    --card-accent:var(--av-purple);
    --card-accent-soft:color-mix(in srgb,var(--av-purple) 11%,transparent);
    --card-accent-line:color-mix(in srgb,var(--av-purple) 42%,transparent);
  }
  #ledWallConfigurator{
    --card-accent:var(--av-purple);
    --card-accent-soft:color-mix(in srgb,var(--av-purple) 11%,transparent);
    --card-accent-line:color-mix(in srgb,var(--av-purple) 42%,transparent);
  }
  .card-head{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    min-height:58px;
    padding:18px 16px 14px;
    border-bottom:1px solid var(--av-line);
  }
  .card-head h2{
    display:flex;
    align-items:center;
    gap:9px;
    margin:0;
    font-size:14px;
    font-family:var(--mono);
    letter-spacing:.1em;
    text-transform:uppercase;
  }
  .card-index{
    display:grid;
    place-items:center;
    width:24px;
    height:24px;
    border:1px solid var(--card-accent-line);
    border-radius:6px;
    background:var(--card-accent-soft);
    color:var(--card-accent);
    font-size:9px;
    letter-spacing:0;
  }
  .card-head > span{
    color:var(--av-dim);
    font-family:var(--mono);
    font-size:11px;
  }
  .card-body{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:14px;
    padding:16px;
  }
  .field{
    display:grid;
    gap:7px;
  }
  .field[hidden]{
    display:none;
  }
  .field label{
    color:var(--muted);
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.08em;
    text-transform:uppercase;
  }
  .full{
    grid-column:1 / -1;
  }
  .result-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:10px;
    padding:0 16px 16px;
  }
  .result{
    min-width:0;
    padding:12px;
    border:1px solid var(--av-line);
    border-left:3px solid var(--card-accent);
    border-radius:var(--radius);
    background:color-mix(in srgb,var(--av-surface-2) 88%,var(--card-accent-soft));
  }
  .result span{
    display:block;
    margin-bottom:5px;
    color:var(--dim);
    font-family:var(--mono);
    font-size:10px;
    letter-spacing:.08em;
    text-transform:uppercase;
  }
  .result strong{
    display:block;
    font-family:var(--mono);
    font-size:18px;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .result.good strong{color:var(--green)}
  .result.warn strong{color:var(--amber)}
  .result.bad strong{color:var(--red)}

  .summary-panel{
    margin-top:18px;
    --card-accent:var(--av-accent);
    --card-accent-soft:var(--av-accent-soft);
    --card-accent-line:var(--av-accent-line);
  }
  .summary-body{
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:16px;
    align-items:start;
    padding:16px;
  }
  .summary-output{
    margin:0;
    min-height:132px;
    white-space:pre-wrap;
    color:var(--av-text);
    font-family:var(--mono);
    font-size:13px;
    line-height:1.55;
    overflow-wrap:anywhere;
  }
  .summary-actions{
    display:flex;
    flex-direction:column;
    gap:8px;
  }
  .hint{
    min-height:21px;
    color:var(--muted);
    font-size:13px;
    line-height:1.45;
    padding:0 16px 16px;
  }
  .hint.success{color:var(--av-success)}
  .hint.error{color:var(--av-danger)}
  .hint.warning{color:var(--av-warning)}
  .status-message{min-height:1.45em}

  .calc-card:focus-within{
    border-color:var(--card-accent);
    box-shadow:var(--shadow),0 0 0 3px var(--card-accent-soft);
  }

  .led-suite{
    position:relative;
    isolation:isolate;
    margin-top:18px;
    overflow:hidden;
    border:1px solid var(--av-line);
    border-radius:18px;
    background:
      linear-gradient(145deg,var(--card-accent-soft),transparent 28rem),
      var(--av-surface);
    box-shadow:var(--shadow-pop);
  }
  .led-suite::before{
    content:"";
    position:absolute;
    z-index:2;
    inset:0 0 auto;
    height:5px;
    background:linear-gradient(90deg,var(--av-purple),var(--av-focus),var(--av-accent));
  }
  .led-suite-head{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:20px;
    padding:24px 22px 20px;
    border-bottom:1px solid var(--av-line);
  }
  .led-suite-title{
    display:grid;
    gap:7px;
    min-width:0;
  }
  .led-suite-kicker{
    margin:0;
    color:var(--av-purple);
    font-family:var(--mono);
    font-size:10px;
    font-weight:800;
    letter-spacing:.12em;
    text-transform:uppercase;
  }
  .led-suite-title h2{
    margin:0;
    font-family:var(--mono);
    font-size:clamp(22px,3vw,34px);
    letter-spacing:-.035em;
    text-transform:uppercase;
  }
  .led-suite-title p{
    max-width:720px;
    margin:0;
    color:var(--av-muted);
    font-size:14px;
  }
  .led-suite-actions{
    display:flex;
    justify-content:flex-end;
    gap:8px;
    flex-wrap:wrap;
  }
  .led-input-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px;
    padding:18px;
  }
  .led-module{
    min-width:0;
    margin:0;
    padding:16px;
    border:1px solid var(--av-line);
    border-radius:12px;
    background:color-mix(in srgb,var(--av-surface-2) 90%,var(--card-accent-soft));
  }
  .led-module legend{
    padding:0 8px;
    color:var(--av-text);
    font-family:var(--mono);
    font-size:11px;
    font-weight:800;
    letter-spacing:.09em;
    text-transform:uppercase;
  }
  .led-module-fields{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:12px;
  }
  .led-mode-fields[hidden]{display:none}
  .field-note{
    margin:0;
    color:var(--av-dim);
    font-size:11px;
    line-height:1.4;
  }
  .led-stage{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(230px,.34fr);
    gap:18px;
    align-items:center;
    margin:0 18px 18px;
    padding:20px;
    overflow:hidden;
    border:1px solid color-mix(in srgb,var(--av-purple) 48%,var(--av-line));
    border-radius:14px;
    background:
      radial-gradient(circle at 22% 0%,color-mix(in srgb,var(--av-purple) 22%,transparent),transparent 45%),
      radial-gradient(circle at 90% 100%,color-mix(in srgb,var(--av-focus) 15%,transparent),transparent 40%),
      #0c121c;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 14px 34px rgba(7,10,16,.18);
    color:#f7f2eb;
  }
  .led-stage-view{
    position:relative;
    display:grid;
    grid-template-columns:auto minmax(0,1fr);
    grid-template-rows:minmax(0,1fr) auto;
    gap:8px 10px;
    align-items:center;
    min-width:0;
    padding:16px 16px 10px 6px;
    perspective:1200px;
  }
  .led-stage-view::before{
    content:"";
    position:absolute;
    z-index:0;
    right:3%;
    bottom:-3%;
    width:86%;
    height:34%;
    border-radius:50%;
    background:radial-gradient(ellipse,rgba(155,128,255,.2),transparent 67%);
    transform:rotateX(72deg);
    filter:blur(3px);
    pointer-events:none;
  }
  .led-stage-axis{
    color:#aeb9c9;
    font-family:var(--mono);
    font-size:9px;
    font-weight:800;
    letter-spacing:.1em;
    text-transform:uppercase;
  }
  .led-stage-axis.vertical{
    position:relative;
    z-index:2;
    grid-row:1;
    writing-mode:vertical-rl;
    transform:rotate(180deg);
  }
  .led-stage-axis.horizontal{
    position:relative;
    z-index:2;
    grid-column:2;
    text-align:center;
  }
  .led-wall-preview{
    position:relative;
    z-index:1;
    grid-column:2;
    width:min(100%,720px);
    max-height:280px;
    margin-inline:auto;
    overflow:hidden;
    border:4px solid #263244;
    border-radius:6px;
    aspect-ratio:var(--wall-ratio,1.6);
    background:
      linear-gradient(90deg,rgba(255,255,255,.34) 1px,transparent 1px),
      linear-gradient(rgba(255,255,255,.34) 1px,transparent 1px),
      repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 4px),
      radial-gradient(circle at 68% 32%,rgba(155,128,255,.75),transparent 34%),
      linear-gradient(135deg,#273567 0%,#764b9d 48%,#b5482c 100%);
    background-size:
      calc(100% / var(--wall-cols,8)) 100%,
      100% calc(100% / var(--wall-rows,5)),
      auto,
      auto,
      auto;
    box-shadow:
      1px 0 0 #46516a,
      3px 2px 0 #303a4c,
      6px 5px 0 #202938,
      11px 10px 0 #141b27,
      22px 26px 42px rgba(0,0,0,.48),
      0 0 34px rgba(155,128,255,.22);
    transform:rotateX(-3deg) rotateY(-10deg) rotateZ(.35deg);
    transform-origin:center;
    transition:transform var(--med) var(--ease),box-shadow var(--med) var(--ease);
  }
  .led-stage-view.front-view .led-wall-preview{
    transform:none;
    box-shadow:0 0 0 1px rgba(255,255,255,.16),0 18px 36px rgba(0,0,0,.38),0 0 34px rgba(155,128,255,.22);
  }
  .led-wall-preview::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(115deg,rgba(255,255,255,.18),transparent 22% 74%,rgba(255,255,255,.08));
    pointer-events:none;
  }
  .led-wall-preview::after{
    content:"NATIVE LED CANVAS";
    position:absolute;
    right:10px;
    bottom:8px;
    padding:4px 6px;
    border:1px solid rgba(255,255,255,.28);
    border-radius:4px;
    background:rgba(8,12,20,.72);
    color:#fff;
    font-family:var(--mono);
    font-size:8px;
    font-weight:800;
    letter-spacing:.12em;
  }
  .led-stage-data{
    display:grid;
    gap:13px;
    min-width:0;
  }
  .led-stage-kicker{
    margin:0;
    color:#d0b9ff;
    font-family:var(--mono);
    font-size:9px;
    font-weight:800;
    letter-spacing:.13em;
    text-transform:uppercase;
  }
  .led-stage-data strong{
    display:block;
    font-family:var(--mono);
    font-size:clamp(21px,3vw,34px);
    line-height:1;
    letter-spacing:-.04em;
  }
  .led-stage-data p{
    margin:0;
    color:#bdc7d4;
    font-size:12px;
    line-height:1.45;
  }
  .led-stage-rails{
    display:grid;
    gap:8px;
  }
  .led-view-toggle{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:6px;
  }
  .led-view-toggle button{
    min-height:44px;
    padding:7px 10px;
    border-color:#3c4960;
    background:#151e2b;
    color:#d5dde7;
    font-size:11px;
  }
  .led-view-toggle button[aria-pressed="true"]{
    border-color:#b59af4;
    background:#302750;
    color:#fff;
    box-shadow:inset 0 0 0 1px rgba(208,185,255,.28);
  }
  .led-stage-rail{
    display:grid;
    grid-template-columns:auto 1fr auto;
    gap:8px;
    align-items:center;
    color:#d5dde7;
    font-family:var(--mono);
    font-size:9px;
    letter-spacing:.06em;
    text-transform:uppercase;
  }
  .led-stage-rail i{
    height:3px;
    overflow:hidden;
    border-radius:999px;
    background:#313d50;
  }
  .led-stage-rail i::before{
    content:"";
    display:block;
    width:var(--rail-fill,60%);
    height:100%;
    border-radius:inherit;
    background:linear-gradient(90deg,#7bd4aa,#c9adff,#ef8f4d);
  }
  .led-result-strip{
    display:grid;
    grid-template-columns:repeat(5,minmax(0,1fr));
    gap:1px;
    border-block:1px solid var(--av-line);
    background:var(--av-line);
  }
  .led-result{
    min-width:0;
    min-height:132px;
    padding:16px;
    background:var(--av-surface);
    box-shadow:inset 0 3px 0 var(--card-accent);
  }
  .led-result span,
  .led-detail-stat span{
    display:block;
    margin-bottom:8px;
    color:var(--av-dim);
    font-family:var(--mono);
    font-size:10px;
    letter-spacing:.08em;
    text-transform:uppercase;
  }
  .led-result strong{
    display:block;
    color:var(--av-text);
    font-family:var(--mono);
    font-size:clamp(17px,2vw,23px);
    line-height:1.15;
    overflow-wrap:anywhere;
  }
  .led-result small{
    display:block;
    margin-top:7px;
    color:var(--av-muted);
    font-size:11px;
    line-height:1.4;
  }
  .led-result.good{box-shadow:inset 0 3px 0 var(--av-success)}
  .led-result.warn{box-shadow:inset 0 3px 0 var(--av-warning)}
  .led-result.bad{box-shadow:inset 0 3px 0 var(--av-danger)}
  .led-result.good strong{color:var(--av-success)}
  .led-result.warn strong{color:var(--av-warning)}
  .led-result.bad strong{color:var(--av-danger)}
  .led-detail-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:12px;
    padding:18px;
  }
  .led-detail{
    min-width:0;
    border:1px solid var(--av-line);
    border-radius:12px;
    background:var(--av-surface-2);
  }
  .led-detail summary{
    min-height:48px;
    padding:14px 16px;
    cursor:pointer;
    color:var(--av-text);
    font-family:var(--mono);
    font-size:11px;
    font-weight:800;
    letter-spacing:.08em;
    text-transform:uppercase;
  }
  .led-detail summary:focus-visible{outline:2px solid var(--av-focus);outline-offset:3px}
  .led-detail-body{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
    padding:0 16px 16px;
  }
  .led-detail-stat{
    min-width:0;
    padding:11px;
    border:1px solid var(--av-line);
    border-radius:8px;
    background:var(--av-surface);
  }
  .led-detail-stat strong{
    display:block;
    font-family:var(--mono);
    font-size:14px;
    overflow-wrap:anywhere;
  }
  .led-detail-copy{
    grid-column:1 / -1;
    margin:0;
    color:var(--av-muted);
    font-size:12px;
    line-height:1.5;
  }
  .led-warning-list{
    grid-column:1 / -1;
    display:grid;
    gap:8px;
    margin:0;
    padding:0;
    list-style:none;
  }
  .led-warning-list li{
    position:relative;
    padding:10px 10px 10px 72px;
    border:1px solid var(--av-line);
    border-radius:8px;
    background:var(--av-surface);
    color:var(--av-text-2);
    font-size:12px;
  }
  .led-warning-list li::before{
    content:attr(data-label);
    position:absolute;
    top:10px;
    left:10px;
    color:var(--av-focus);
    font-family:var(--mono);
    font-size:9px;
    font-weight:800;
    letter-spacing:.07em;
  }
  .led-warning-list li[data-severity="warn"]::before{color:var(--av-warning)}
  .led-warning-list li[data-severity="bad"]::before{color:var(--av-danger)}
  .led-inline-actions{
    grid-column:1 / -1;
    display:flex;
    gap:8px;
    flex-wrap:wrap;
  }
  .led-disclaimer{
    margin:0;
    padding:0 18px 18px;
    color:var(--av-warning);
    font-size:12px;
    line-height:1.5;
  }

  .feedback-success{
    animation:confirm var(--med) var(--ease);
    border-color:rgba(107,224,146,.85) !important;
  }
  .feedback-error{
    animation:shake 160ms cubic-bezier(.3,0,.2,1);
    border-color:var(--red) !important;
    box-shadow:0 0 0 3px rgba(255,107,107,.16) !important;
  }
  @keyframes confirm{
    0%{transform:scale(1)}
    45%{transform:scale(1.02);box-shadow:0 0 0 4px rgba(107,224,146,.14)}
    100%{transform:scale(1);box-shadow:0 0 0 rgba(107,224,146,0)}
  }
  @keyframes shake{
    0%,100%{transform:translateX(0)}
    30%{transform:translateX(-4px)}
    60%{transform:translateX(4px)}
    82%{transform:translateX(-2px)}
  }
  .noscript{
    margin:20px;
    padding:16px;
    border:1px solid var(--red);
    border-radius:var(--radius);
    background:#231212;
    color:#ffe0e0;
  }

  @media (max-width:1080px){
    .grid{
      grid-template-columns:1fr;
    }
    .led-result-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
    .led-stage{grid-template-columns:minmax(0,1.4fr) minmax(210px,.6fr)}
  }
  @media (max-width:680px){
    .topbar,
    .hero{
      align-items:flex-start;
      grid-template-columns:1fr;
      flex-direction:column;
    }
    .top-actions,
    .hero-actions{
      width:100%;
      justify-content:space-between;
    }
    .hero-actions button{flex:1}
    main{
      padding:12px;
    }
    .card-body,
    .result-grid,
    .summary-body,
    .led-input-grid,
    .led-module-fields,
    .led-result-strip,
    .led-detail-grid,
    .led-detail-body{
      grid-template-columns:1fr;
    }
    .led-suite-head{flex-direction:column;padding:22px 18px 18px}
    .led-suite-actions{width:100%;justify-content:stretch}
    .led-suite-actions button{flex:1 1 140px}
    .led-input-grid,
    .led-detail-grid{padding:12px}
    .led-stage{grid-template-columns:1fr;margin:0 12px 12px;padding:16px}
    .led-stage-data{grid-template-columns:minmax(0,1fr) minmax(180px,.7fr);align-items:end}
    .led-detail-copy,
    .led-warning-list,
    .led-inline-actions{grid-column:auto}
    .summary-actions{
      flex-direction:row;
      flex-wrap:wrap;
    }
  }
  @media (max-width:500px){
    .led-stage-data{grid-template-columns:1fr}
    .led-wall-preview{border-width:3px}
  }
  @media (hover:hover) and (pointer:fine) and (prefers-reduced-motion:no-preference){
    .calc-card{
      transition:transform var(--med) var(--ease),border-color var(--med) var(--ease),box-shadow var(--med) var(--ease);
    }
    .calc-card:hover{
      transform:translateY(-3px);
      border-color:var(--card-accent-line);
      box-shadow:var(--shadow-pop);
    }
  }
  @media (prefers-reduced-motion:no-preference){
    .hero{animation:panel-arrive 420ms var(--ease) both}
    .calc-card,
    .summary-panel,
    .led-suite{animation:panel-arrive 460ms var(--ease) both}
    .calc-card:nth-child(2){animation-delay:45ms}
    .calc-card:nth-child(3){animation-delay:90ms}
    .calc-card:nth-child(4){animation-delay:135ms}
    .calc-card:nth-child(5){animation-delay:180ms}
    .calc-card:nth-child(6){animation-delay:225ms}
    .led-suite{animation-delay:270ms}
    .summary-panel{animation-delay:315ms}
  }
  @keyframes panel-arrive{
    from{opacity:0;transform:translateY(10px)}
    to{opacity:1;transform:translateY(0)}
  }
  @media (prefers-reduced-motion:reduce){
    *,
    *::before,
    *::after{
      animation-duration:1ms !important;
      transition-duration:1ms !important;
      scroll-behavior:auto !important;
    }
  }

/* Shared navigation and status for the split quick/LED calculator pages. */
.calc-jump{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.calc-jump a,.button-link{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 14px;border:1px solid var(--av-line-strong);border-radius:8px;background:var(--av-surface);color:var(--av-text);font-family:var(--mono);font-size:12px;font-weight:700;text-decoration:none}
.calc-jump a:hover,.button-link:hover{border-color:var(--av-accent);color:var(--av-accent)}
.calc-jump .calc-jump-feature{margin-left:auto;border-color:var(--av-accent-line);background:var(--av-accent-soft);color:var(--av-accent-strong)}
.calc-jump a:focus-visible,.button-link:focus-visible{outline:3px solid var(--av-focus);outline-offset:3px}
.led-page-status{display:flex;align-items:center;gap:14px;margin:0 0 18px;padding:12px 16px;border:1px solid var(--av-line);border-radius:10px;background:var(--av-surface);color:var(--av-text)}
.led-page-status #saveStatus{flex:none;font-family:var(--mono);font-size:11px;font-weight:800;text-transform:uppercase;color:var(--av-accent)}
.led-page-status #actionStatus{font-size:13px}
.led-page-status #actionStatus.error{color:var(--av-danger)}
.led-page-status #actionStatus.success{color:var(--av-success)}
html[data-av-tool="led-wall-calculator"] .led-suite{margin-top:0}
html[data-av-tool="led-wall-calculator"] .hero{margin-bottom:18px}
@media (min-width:1800px){main{max-width:2160px}.grid{grid-template-columns:repeat(3,minmax(0,1fr))}.led-input-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:680px){.calc-jump{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.calc-jump a{width:100%}.calc-jump .calc-jump-feature{grid-column:1/-1;margin-left:0}.button-link{flex:1}.led-page-status{align-items:flex-start;flex-direction:column}}
.theme-toggle{min-height:44px;white-space:nowrap;font-family:var(--mono);font-size:11px;font-weight:700}
.calc-card{scroll-margin-top:92px}
@media (max-width:680px){.top-actions{align-items:center}.theme-toggle{flex:1 1 auto}}