/* 11 cassette-futurism — the greys become hardware and the blue becomes the
   tube: a #C0C0C0-family chassis with two-tone bevels around a sunken screen
   glowing #6fb2ff. The page is framed as an application window. */
@layer tokens, base, layout, components;

@layer tokens {
  :root {
    color-scheme: light dark;

    /* Light: the chassis dominates. Dark: the screen takes over and the grey
       is reduced to a thin bezel. */
    --chassis:   light-dark(#cdd1d6, #171a1e);
    --recess:    light-dark(#adb3bb, #212529);
    --screen:    light-dark(#0a1220, #030509);
    --screen-ink: light-dark(#9fd0ff, #6fb2ff);
    --chassis-ink: light-dark(#232a33, #cdd1d6);
    --amber:     light-dark(#1c4f86, #8fc7ff);
    /* The bevel simulates a light source, so the highlight and shadow edges
       have to swap or an embossed panel reads debossed. */
    --bevel-hi:  light-dark(#eef1f4, #3c434c);
    --bevel-lo:  light-dark(#767d87, #0a0c0f);

    --radius: 2px;
    --mono: ui-monospace, "SF Mono", "DejaVu Sans Mono", Menlo, Consolas, monospace;
  }
  :root:has(#light:target) { color-scheme: light; }
  :root:has(#dark:target)  { color-scheme: dark; }
}

@layer base {
  * { box-sizing: border-box; }
  body {
    margin: 0;
    padding: clamp(0.5rem, 2vw, 1.75rem);
    background: var(--recess);
    color: var(--chassis-ink);
    font: 0.9375rem/1.6 var(--mono);
  }
  h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: 0.02em; }
  p { margin: 0; }
  dl, dd { margin: 0; }
  figure { margin: 0; }
  img { display: block; max-inline-size: 100%; block-size: auto; }
  a { color: var(--amber); }
  a:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition-duration: 0.01ms !important; }
  }
}

@layer layout {
  .window {
    max-inline-size: 1200px;
    margin-inline: auto;
    background: var(--chassis);
    border-radius: var(--radius);
    border-block-start: 2px solid var(--bevel-hi);
    border-inline-start: 2px solid var(--bevel-hi);
    border-block-end: 2px solid var(--bevel-lo);
    border-inline-end: 2px solid var(--bevel-lo);
    box-shadow: 0 18px 50px -24px rgb(0 0 0 / 0.6);
    overflow: hidden;
  }
}

@layer components {
  .titlebar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.4rem 0.6rem;
    background: var(--recess);
    border-block-end: 2px solid var(--bevel-lo);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
  }
  .controls { display: flex; gap: 0.3rem; }
  .controls b {
    inline-size: 0.85rem; block-size: 0.85rem; background: var(--chassis);
    border-block-start: 1px solid var(--bevel-hi);
    border-inline-start: 1px solid var(--bevel-hi);
    border-block-end: 1px solid var(--bevel-lo);
    border-inline-end: 1px solid var(--bevel-lo);
  }
  .title { margin-inline-end: auto; }
  .schemes { display: flex; gap: 0.3rem; }
  .schemes a {
    text-decoration: none; color: var(--chassis-ink); padding: 0.15rem 0.5rem;
    background: var(--chassis);
    border-block-start: 1px solid var(--bevel-hi);
    border-inline-start: 1px solid var(--bevel-hi);
    border-block-end: 1px solid var(--bevel-lo);
    border-inline-end: 1px solid var(--bevel-lo);
  }
  .schemes a:hover { color: var(--amber); }

  .menustrip {
    display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.25rem;
    padding: 0.6rem 0.9rem;
    border-block-end: 2px solid var(--bevel-lo);
    font-size: 0.8125rem;
  }
  .brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none;
           color: var(--chassis-ink); }
  .brand img { inline-size: 2rem; }
  .name { font-weight: 700; letter-spacing: 0.04em; }
  .nav { display: flex; flex-wrap: wrap; gap: 0 1rem; margin-inline-start: auto; }
  .nav a { color: var(--chassis-ink); text-decoration: none;
           border-block-end: 1px dotted currentColor; }
  .nav a:hover { color: var(--amber); }

  /* The sunken screen: inverted bevel, scanlines only inside. */
  .screen {
    margin: 0.9rem;
    padding: clamp(1rem, 3vw, 2rem);
    background: var(--screen);
    color: var(--screen-ink);
    border-block-start: 2px solid var(--bevel-lo);
    border-inline-start: 2px solid var(--bevel-lo);
    border-block-end: 2px solid var(--bevel-hi);
    border-inline-end: 2px solid var(--bevel-hi);
    position: relative;
    overflow: hidden;
  }
  .screen::after {
    content: "";
    position: absolute; inset: 0; pointer-events: none;
    background: repeating-linear-gradient(
      to bottom, rgb(0 0 0 / 0.3) 0 1px, transparent 1px 3px);
  }
  /* :not(.btn) matters — `.screen a` outranks `.btn-primary` on specificity,
     and without it the primary button paints tube-blue on tube-blue. */
  .screen a:not(.btn) { color: var(--screen-ink); }
  .screen a:focus-visible { outline-color: var(--screen-ink); }

  .hero { padding-block: clamp(1rem, 3vw, 2.5rem) 0; }
  .eyebrow { font-size: 0.75rem; letter-spacing: 0.12em; margin-block-end: 1rem;
             opacity: 0.85; }
  .hero h1 { font-size: clamp(1.625rem, 4.5vw, 3.25rem); line-height: 1.1;
             text-transform: uppercase; text-wrap: balance; }
  .lede { margin-block-start: 1.25rem; max-inline-size: 62ch; opacity: 0.92; }
  .actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-block-start: 1.75rem; }
  .btn {
    display: inline-block; padding: 0.5rem 1.125rem;
    border: 2px solid currentColor; border-radius: var(--radius);
    color: var(--screen-ink); background: transparent;
    font: 700 0.8125rem/1 var(--mono);
    letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
  }
  .btn:hover { background: var(--screen-ink); color: var(--screen); }
  .btn-primary { background: var(--screen-ink); color: var(--screen); }
  .btn-primary:hover { background: transparent; color: var(--screen-ink); }
  .hero-figure { margin-block-start: 2rem; border: 1px dashed currentColor; }
  /* The photograph is put through the tube: monochrome, biased to the
     phosphor, so it belongs to the screen rather than sitting on top of it. */
  .hero-figure img, .strip img {
    inline-size: 100%;
    object-fit: cover;
    filter: grayscale(1) contrast(1.25) brightness(0.85)
            sepia(1) hue-rotate(175deg) saturate(2.6);
  }
  .hero-figure img { aspect-ratio: 24 / 7; object-position: 50% 58%; }

  .angebot, .kontakt { padding-block: clamp(2rem, 4vw, 3rem) 0; }
  .screen h2 { font-size: 0.9375rem; letter-spacing: 0.14em; margin-block-end: 1.25rem; }
  .items dt { padding-block-start: 0.875rem; border-block-start: 1px dashed currentColor;
              font-size: 0.875rem; letter-spacing: 0.08em; text-transform: uppercase; }
  .items dd { padding-block: 0.25rem 0.875rem; max-inline-size: 74ch; opacity: 0.9; }
  .strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
           gap: 0.75rem; margin-block-start: 1.5rem; }
  .strip figure { border: 1px dashed currentColor; }
  .strip img { aspect-ratio: 4 / 3; }
  @media (max-width: 640px) { .strip { grid-template-columns: 1fr; } }

  .contact { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
             border: 1px dashed currentColor; }
  .contact > div { padding: 1rem; border-inline-end: 1px dashed currentColor; }
  .contact > div:last-child { border-inline-end: 0; }
  .contact dt { font-size: 0.6875rem; letter-spacing: 0.1em; margin-block-end: 0.5rem;
                opacity: 0.85; }
  .contact dd { line-height: 1.8; }
  @media (max-width: 700px) {
    .contact { grid-template-columns: 1fr; }
    .contact > div { border-inline-end: 0; border-block-end: 1px dashed currentColor; }
    .contact > div:last-child { border-block-end: 0; }
  }

  .colophon {
    padding: 1.25rem 0.9rem 2rem;
    border-block-start: 2px solid var(--bevel-hi);
    display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem;
    font-size: 0.8125rem;
  }
  .sections { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }
  .colophon a { color: var(--chassis-ink); text-decoration: none;
                border-block-end: 1px dotted currentColor; }
  .colophon a:hover { color: var(--amber); }
  .up { margin-inline-start: auto; }

  /* Below 600px the chrome would eat the viewport. Nothing is lost when it
     goes, because the bar carries no content. */
  @media (max-width: 600px) {
    body { padding: 0; background: var(--chassis); }
    .window { border: 0; box-shadow: none; }
    .titlebar .title, .controls { display: none; }
    .titlebar { justify-content: flex-end; }
    .screen { margin: 0.5rem; }
    .nav { margin-inline-start: 0; }
  }
}