:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #ffffff;
  color: #17202a;
  --primary: #2980B9;
  --primary-dark: #216a98;
  --primary-soft: #eef6fb;
  --border: #d9e2e8;
  --muted: #61717d;
}

* { box-sizing: border-box; }
body { margin: 0; background: #ffffff; }
main { width: min(920px, calc(100% - 32px)); margin: 40px auto 80px; }
header { display: flex; justify-content: space-between; gap: 32px; align-items: flex-start; margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.title-block { max-width: 620px; }
.title-block > p { margin-bottom: 0; color: var(--muted); }
.eyebrow-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
h1 { margin: 6px 0 8px; font-size: clamp(2rem, 6vw, 3.6rem); letter-spacing: -0.04em; }
h2 { margin-top: 0; }
h3 { margin-bottom: 10px; }
p { line-height: 1.5; }
.eyebrow { margin: 0; color: var(--primary); text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; font-weight: 800; }
.experimental-tag { display: inline-flex; align-items: center; border: 1px solid #b8d8eb; border-radius: 999px; padding: 3px 8px; background: var(--primary-soft); color: var(--primary-dark); font-size: .7rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.card { background: #ffffff; border: 1px solid var(--border); border-radius: 14px; padding: 22px; margin-top: 16px; box-shadow: 0 8px 24px rgba(41, 128, 185, .06); }
.connection-panel { min-width: 230px; display: grid; gap: 10px; justify-items: end; padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; background: #fbfdfe; }
.connection-label { color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.connection-status { display: inline-flex; align-items: center; gap: 8px; font-size: .9rem; font-weight: 750; }
.connection-status::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: #9aa7b1; box-shadow: 0 0 0 3px rgba(154, 167, 177, .15); }
.connection-status.disconnected { color: #5e6b75; }
.connection-status.connecting { color: var(--primary-dark); }
.connection-status.connecting::before { background: var(--primary); box-shadow: 0 0 0 3px rgba(41, 128, 185, .16); }
.connection-status.connected { color: #1d7044; }
.connection-status.connected::before { background: #27ae60; box-shadow: 0 0 0 3px rgba(39, 174, 96, .16); }
.connection-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
button { border: 1px solid var(--primary); border-radius: 9px; padding: 10px 14px; font: inherit; font-weight: 750; color: #ffffff; background: var(--primary); cursor: pointer; transition: background .15s ease, border-color .15s ease, opacity .15s ease; }
button:hover:not(:disabled) { background: var(--primary-dark); border-color: var(--primary-dark); }
button.secondary { color: var(--primary-dark); background: #ffffff; border-color: #9fc8df; }
button.secondary:hover:not(:disabled) { color: #ffffff; background: var(--primary-dark); border-color: var(--primary-dark); }
button:disabled { cursor: not-allowed; opacity: .42; }
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid rgba(41, 128, 185, .24); outline-offset: 2px; }
form { display: grid; gap: 16px; }
label { display: grid; gap: 7px; font-weight: 700; }
input, select { width: 100%; border: 1px solid #aebdc7; border-radius: 9px; padding: 11px 12px; font: inherit; background: #ffffff; color: #17202a; }
input:focus, select:focus { border-color: var(--primary); }
small { color: var(--muted); font-weight: 400; }
.device-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 0; }
.device-grid div { min-width: 0; }
dt { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; }
dd { margin: 6px 0 0; overflow-wrap: anywhere; }
.section-heading { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.section-heading p { margin: -8px 0 0; color: var(--muted); }
.result { min-height: 1.5em; margin-bottom: 0; font-weight: 600; }
.result.error { color: #b42318; }
.browser-compatibility-screen { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; min-height: 100dvh; padding: 24px; background: #ffffff; text-align: center; }
.browser-compatibility-card { width: min(560px, 100%); display: grid; justify-items: center; gap: 12px; }
.compatibility-mark { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-size: 1.65rem; font-weight: 900; }
.browser-compatibility-card .eyebrow { margin: 4px 0 0; }
.browser-compatibility-card h2 { margin: 0; font-size: clamp(1.8rem, 5vw, 2.65rem); letter-spacing: -0.035em; }
.browser-compatibility-card > p:last-child { max-width: 48ch; margin: 0; color: var(--muted); }
body.browser-unsupported { overflow: hidden; }
.hidden { display: none; }
.diagnostics summary { cursor: pointer; font-weight: 700; color: var(--primary-dark); }
pre { max-height: 320px; overflow: auto; white-space: pre-wrap; word-break: break-word; font-size: .78rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 8px; }
button.danger { background: #b42318; border-color: #b42318; color: #ffffff; }
button.danger:hover:not(:disabled) { background: #8f1c13; border-color: #8f1c13; }
button.compact { padding: 7px 10px; font-size: .85rem; }
.check-label { display: flex; grid-template-columns: none; flex-direction: row; align-items: center; gap: 9px; font-weight: 600; }
.check-label input { width: auto; }
.saved-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.saved-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; border: 1px solid var(--border); border-radius: 9px; padding: 9px 11px; }

@media (max-width: 720px) {
  main { margin-top: 24px; }
  header { flex-direction: column; gap: 20px; }
  .connection-panel { width: 100%; justify-items: start; }
  .connection-actions { width: 100%; justify-content: flex-start; }
  .device-grid { grid-template-columns: repeat(2, 1fr); }
}