:root {
      --bg:      oklch(98% 0.004 240);
      --surface: oklch(100% 0 0);
      --fg:      oklch(20% 0.02 240);
      --muted:   oklch(50% 0.018 240);
      --border:  oklch(90% 0.006 240);
      --accent:  oklch(56% 0.12 170);

      --accent-soft: color-mix(in oklch, var(--accent) 14%, transparent);
      --fg-soft:     color-mix(in oklch, var(--fg) 6%, transparent);
      --accent-ink:  color-mix(in oklch, var(--accent) 72%, black);

      --font-display: 'Söhne', 'Avenir Next', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
      --font-body:    -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
      --font-mono: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;

      --fs-h1: clamp(40px, 5vw, 62px);
      --fs-h2: clamp(28px, 3.4vw, 40px);
      --fs-h3: 22px;
      --fs-lead: 19px;
      --fs-body: 16px;
      --fs-meta: 13px;

      --gap-sm: 12px;
      --gap-md: 20px;
      --gap-lg: 32px;
      --gap-xl: 56px;
      --gap-2xl: 96px;
      --container: 1120px;
      --gutter: 32px;

      --radius: 12px;
      --radius-lg: 18px;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--fg);
      font-family: var(--font-body);
      font-size: var(--fs-body);
      line-height: 1.55;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    img, svg { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button { font: inherit; cursor: pointer; }
    p { text-wrap: pretty; }
    h1, h2, h3 { text-wrap: balance; }
    :focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 2px; }

    .container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
    .section { padding-block: clamp(48px, 8vw, var(--gap-2xl)); }
    .section + .section { border-top: 1px solid var(--border); }
    .stack-lg { display: flex; flex-direction: column; gap: var(--gap-lg); }
    .row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--gap-md); }
    .grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: var(--gap-lg); align-items: start; }
    @media (max-width: 920px) { .grid-2-1 { grid-template-columns: 1fr; } }

    h1 { font-family: var(--font-display); font-size: var(--fs-h1); line-height: 1.04; letter-spacing: -0.02em; margin: 0; font-weight: 700; }
    h2 { font-family: var(--font-display); font-size: var(--fs-h2); line-height: 1.1; letter-spacing: -0.015em; margin: 0; font-weight: 700; }
    h3 { font-size: var(--fs-h3); font-weight: 600; line-height: 1.3; letter-spacing: -0.005em; margin: 0; }
    .lead { font-size: var(--fs-lead); line-height: 1.55; color: var(--muted); max-width: 60ch; margin: 0; }
    .eyebrow {
      font-family: var(--font-mono);
      font-size: 12px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--accent-ink);
      margin: 0 0 var(--gap-md);
    }
    .meta { font-family: var(--font-mono); font-size: var(--fs-meta); color: var(--muted); }
    .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

    .topnav {
      position: sticky; top: 0; z-index: 10;
      background: color-mix(in oklch, var(--bg) 92%, transparent);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }
    .topnav-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 14px; gap: var(--gap-md); }
    .topnav .logo { font-family: var(--font-display); font-size: 20px; font-weight: 700; letter-spacing: -0.01em; }
    .topnav nav { display: flex; gap: var(--gap-lg); }
    .topnav nav a { font-size: 14px; color: var(--muted); transition: color .15s ease; }
    .topnav nav a:hover { color: var(--fg); }
    .pagefoot { padding-block: var(--gap-xl); color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); }

    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      padding: 11px 20px; min-height: 44px;
      border-radius: var(--radius); border: 1px solid transparent;
      font-size: 15px; font-weight: 600; letter-spacing: -0.005em;
      transition: transform .05s ease, background .15s ease, border-color .15s ease;
    }
    .btn:active { transform: translateY(1px); }
    .btn-primary { background: color-mix(in oklch, var(--accent) 84%, black); color: var(--surface); border-color: color-mix(in oklch, var(--accent) 84%, black); }
    .btn-primary:hover { background: color-mix(in oklch, var(--accent) 70%, black); border-color: color-mix(in oklch, var(--accent) 70%, black); }
    .btn-secondary { background: transparent; color: var(--fg); border-color: var(--border); }
    .btn-secondary:hover { border-color: var(--fg); }
    .btn-icon { width: 48px; height: 48px; padding: 0; }

    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
    }
    .pill {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 4px 10px; background: var(--accent-soft); color: var(--accent-ink);
      border-radius: 999px; font-family: var(--font-mono);
      font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase;
    }
    .badge {
      display: inline-flex; align-items: center;
      padding: 2px 8px; background: var(--fg-soft); color: var(--muted);
      border-radius: 999px; font-family: var(--font-mono);
      font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase;
    }
    .rule { border: 0; border-top: 1px solid var(--border); margin: 0; }

    .field { display: flex; flex-direction: column; gap: 6px; }
    .field label { font-size: 13px; color: var(--muted); }
    .input {
      width: 100%; padding: 11px 14px; min-height: 44px;
      border: 1px solid var(--border); border-radius: var(--radius);
      background: var(--surface); color: var(--fg);
      font: inherit; font-size: 15px;
    }
    .input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

    .log-row {
      display: grid; grid-template-columns: 120px 1fr 110px; gap: var(--gap-lg);
      padding: 18px 12px; border-top: 1px solid var(--border);
      align-items: baseline; border-radius: var(--radius);
    }
    .log-row .log-date { color: var(--muted); }
    .log-row h3 { font-size: 18px; }
    .log-row .pull { text-align: right; }
    .rowlink { cursor: pointer; transition: background .15s ease; }
    .rowlink:hover { background: var(--fg-soft); }
    .log-row.is-active { background: var(--accent-soft); }

    .radio-card {
      background: var(--surface); border: 1px solid var(--border);
      border-radius: var(--radius-lg); padding: 24px;
      box-shadow: 0 1px 2px color-mix(in oklch, var(--fg) 5%, transparent),
                  0 14px 36px color-mix(in oklch, var(--fg) 7%, transparent);
    }
    .faceplate {
      background: linear-gradient(180deg, var(--surface), color-mix(in oklch, var(--border) 40%, var(--surface)));
      border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
    }
    .face-brand { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
    .face-logo { font-family: var(--font-display); font-weight: 700; font-size: 22px; letter-spacing: -0.01em; }
    .face-sub { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; }
    .onair {
      margin-left: auto; display: inline-flex; align-items: center; gap: 7px;
      font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; color: var(--muted);
    }
    .led { width: 9px; height: 9px; border-radius: 50%; background: var(--fg-soft); border: 1px solid var(--border); transition: all .2s ease; }
    .is-playing .led { background: var(--accent); border-color: var(--accent-ink); box-shadow: 0 0 10px var(--accent); }
    .is-playing .onair { color: var(--accent-ink); }
    .lcd {
      background: color-mix(in oklch, var(--fg) 93%, black);
      border-radius: 10px; padding: 14px 18px; display: grid; gap: 3px;
    }
    .lcd span { display: block; }
    .lcd .l1 { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: color-mix(in oklch, var(--bg) 60%, white); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .lcd .l2 { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; color: color-mix(in oklch, var(--bg) 94%, white); }
    .lcd .l3 { font-family: var(--font-mono); font-size: 13px; color: color-mix(in oklch, var(--bg) 55%, white); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .dial { margin-top: 18px; }
    .dial svg { width: 100%; height: auto; }
    .dial-base { stroke: color-mix(in oklch, var(--fg) 30%, transparent); stroke-width: 1.5; }
    .tick { stroke: var(--muted); stroke-width: 1.5; }
    .tick-minor { stroke: color-mix(in oklch, var(--fg) 25%, transparent); stroke-width: 1; }
    .dial-label { fill: var(--muted); font-family: var(--font-mono); font-size: 11px; }
    .needle-line { stroke: var(--fg); stroke-width: 2.5; stroke-linecap: round; }
    .needle-dot { fill: var(--fg); }
    .controls { display: flex; align-items: center; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
    .vol { display: flex; align-items: center; gap: 10px; margin-left: auto; color: var(--muted); }
    .vol input[type="range"] { width: 150px; accent-color: var(--fg); }
    .vol-meta { margin: 12px 0 0; }
    .letter { min-height: 440px; }
    .letter-head { display: grid; grid-template-columns: 84px 1fr; gap: 4px 12px; font-size: 14px; margin: 0; }
    .letter-head dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding-top: 2px; }
    .letter-head dd { margin: 0; min-width: 0; overflow-wrap: break-word; }
    .letter-body p { margin: 0 0 12px; font-size: 15px; line-height: 1.65; }
    .search-wrap { max-width: 460px; margin-bottom: 10px; }

    @media (max-width: 640px) {
      .log-row { grid-template-columns: 1fr auto; gap: 4px 12px; }
      .log-row .log-date { grid-column: 1 / -1; }
      .vol { margin-left: 0; width: 100%; }
      .vol input[type="range"] { flex: 1; width: auto; }
      .letter { min-height: 0; }
    }