:root {
  color-scheme: light;
  --bg: #f6f7f8;
  --panel: #ffffff;
  --panel-alt: #eef5f3;
  --text: #172026;
  --muted: #65717c;
  --line: #d7dde2;
  --line-strong: #aeb8c2;
  --accent: #167d73;
  --accent-strong: #0f5f58;
  --accent-soft: #d9efeb;
  --danger: #b9363e;
  --warning-bg: #fff5d6;
  --warning-line: #d7ae44;
  --focus: #2f6fed;
  --shadow: 0 12px 32px rgba(23, 32, 38, 0.08);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
}

body {
  min-height: 100vh;
  margin: 0;
}

button,
select {
  font: inherit;
}

button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0 16px;
  color: #ffffff;
  background: var(--accent);
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--accent-strong);
}

button:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus), transparent 65%);
  outline-offset: 2px;
}

button:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button.secondary {
  color: var(--text);
  background: #ffffff;
  border-color: var(--line-strong);
}

button.secondary:hover:not(:disabled) {
  background: #f0f3f6;
}

button.danger {
  background: var(--danger);
}

.app-shell__header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 clamp(16px, 4vw, 48px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--text);
  font-weight: 720;
  text-decoration: none;
}

.nav {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}

.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  border-radius: 6px;
  padding: 0 12px;
  color: var(--muted);
  text-decoration: none;
}

.nav a.is-active {
  color: var(--text);
  background: var(--accent-soft);
}

.app-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: clamp(20px, 4vw, 40px);
}

.page-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.page-heading h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 2.6rem, 2.6rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.page-heading p {
  max-width: 68ch;
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.support-warning {
  display: none;
  margin-bottom: 18px;
  border: 1px solid var(--warning-line);
  border-radius: 8px;
  padding: 14px 16px;
  background: var(--warning-bg);
  line-height: 1.45;
}

.support-warning.is-visible {
  display: block;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 1.05rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.field-stack {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 7px;
}

.field label {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0 12px;
  color: var(--text);
  background: #ffffff;
}

.release-meta {
  min-height: 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  color: var(--muted);
  background: var(--panel-alt);
  line-height: 1.45;
}

.release-meta strong {
  color: var(--text);
}

.firmware-description {
  display: block;
  margin-top: 8px;
  color: var(--text);
  white-space: pre-wrap;
}

.more-info-link {
  display: inline-flex;
  margin-top: 8px;
  color: var(--accent-strong);
  font-weight: 650;
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.port-state {
  color: var(--muted);
  font-size: 0.92rem;
}

.progress-wrap {
  display: grid;
  gap: 10px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.progress-bar {
  width: 100%;
  height: 14px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #eef1f4;
}

.progress-bar__fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #2f6fed);
  transition: width 180ms ease;
}

.status-line {
  min-height: 44px;
  margin: 0;
  color: var(--text);
  line-height: 1.45;
}

.log {
  height: 220px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #111820;
  color: #d9f5ef;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(23, 32, 38, 0.48);
}

.dialog {
  width: min(560px, 100%);
  border-radius: 8px;
  padding: 22px;
  background: #ffffff;
  box-shadow: 0 20px 60px rgba(23, 32, 38, 0.22);
}

.dialog h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.dialog-body {
  color: var(--muted);
  line-height: 1.55;
}

.dialog-body ol {
  padding-left: 22px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

.about-empty {
  min-height: 320px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: #ffffff;
}

@media (max-width: 800px) {
  .app-shell__header,
  .page-heading {
    align-items: start;
  }

  .app-shell__header {
    flex-direction: column;
    gap: 8px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .page-heading,
  .layout-grid {
    grid-template-columns: 1fr;
  }

  .actions-row,
  .dialog-actions {
    align-items: stretch;
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}