:root { color-scheme: light; --blue: #1a56db; --ink: #17243b; --muted: #526176; --line: #dce3ed; }
* { box-sizing: border-box; }
body { margin: 0; background: #f3f5f9; color: var(--ink); font: 16px/1.55 system-ui, sans-serif; }
a { color: #174bbd; text-underline-offset: 3px; }
header { background: white; border-bottom: 1px solid var(--line); }
nav { max-width: 1320px; margin: auto; display: flex; flex-wrap: wrap; gap: 12px 24px; padding: 18px 24px; align-items: center; }
nav strong { margin-right: auto; } nav a { font-size: .95rem; } nav [aria-current] { font-weight: 700; }
main { max-width: 1320px; margin: auto; padding: 28px 24px 60px; }
h1 { font-size: clamp(1.8rem, 3vw, 2.4rem); letter-spacing: -.035em; margin: 0 0 8px; }
h2 { font-size: 1.3rem; margin: 0 0 12px; } h3 { font-size: 1.1rem; margin: 0 0 8px; }
p { margin: 0 0 16px; } .intro, .muted { color: var(--muted); }
.workspace { display: grid; grid-template-columns: 350px minmax(0,1fr); gap: 24px; align-items: start; margin: 24px 0 36px; }
.panel, .card { background: white; border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.panel { border-top: 4px solid var(--blue); }
fieldset { border: 0; padding: 0; margin: 0 0 20px; min-width: 0; } legend { font-weight: 700; margin-bottom: 14px; }
.device { display: flex; justify-content: space-between; gap: 16px; align-items: center; margin: 0 0 12px; }
select { font: inherit; min-width: 66px; min-height: 44px; padding: 6px 10px; border: 1px solid #95a2b6; border-radius: 6px; background: white; color: var(--ink); }
.radio { display: block; padding: 8px 0; cursor: pointer; } input[type=radio] { accent-color: var(--blue); margin-right: 8px; width: 18px; height: 18px; vertical-align: middle; }
.required { padding: 12px; background: #edf3ff; border-radius: 6px; font-size: .9rem; }
.stats { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0; }
.stat { flex: 1; min-width: 130px; padding: 14px; background: #edf3ff; border-radius: 8px; } .stat strong { display: block; font-size: 1.3rem; } .stat span { font-size: .875rem; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.button { display: inline-block; padding: 10px 16px; border: 1px solid var(--line); border-radius: 7px; text-decoration: none; font-weight: 600; background: white; }
.button.primary { color: white; background: var(--blue); border-color: var(--blue); }
a:focus-visible, select:focus-visible, input:focus-visible { outline: 3px solid #d17d00; outline-offset: 4px; }
.preview { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 6px; background: white; }
.gallery { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.gallery .card { padding: 18px; } .gallery p { font-size: .9rem; color: var(--muted); }
.gallery img { aspect-ratio: 16/9; object-fit: contain; }
.measurements img { aspect-ratio: 4/3; }
.notice { padding: 16px; background: #fff7e7; border-left: 4px solid #b57200; border-radius: 4px; }
footer { margin-top: 28px; color: var(--muted); font-size: .875rem; }
[hidden] { display: none !important; }
@media(max-width: 850px) { .workspace { grid-template-columns: 1fr; } }
@media(max-width: 560px) { main { padding: 22px 16px 40px; } nav { padding: 16px; gap: 12px; } nav strong { width: 100%; } .gallery { grid-template-columns: 1fr; } .panel { padding: 18px; } }