/* Match on-device staff UI (theme.h + My Classes screen):
   navy chrome, cool blue-gray canvas, white cards, sky accent. */
:root {
  --bg: #eaf1f4;
  --soft: #e9eef5;
  --surface: #ffffff;
  --border: #d4d8dd;
  --text: #1b1f23;
  --muted: #6b7280;
  --primary: #272766;
  --primary-dark: #0d1f4a;
  --accent: #129cf3;
  --accent-soft: #d7effc;
  --on-primary: #ffffff;
  --header-sub: #b8c0dc;
  --ok: #1f9d55;
  --ok-soft: #dff6e7;
  --warn: #e8890c;
  --err: #d64545;
  --chrome: #0d1f4a;
  --chrome-mid: #1a2748;
  --nav-idle: #111827;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --sans: "Source Sans 3", "Segoe UI", sans-serif;
  --shell-max: 960px;
  --pad-x: 20px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #cfd8e3;
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 10px var(--pad-x);
  background: #0b0e1a;
  color: #e8eaf4;
  border-bottom: 1px solid #2c3356;
}

.site-nav .site-label {
  font-size: 0.8rem;
  color: #6d76a0;
}

.site-nav .tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid #2c3356;
  color: #e8eaf4;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
}

.site-nav a:hover {
  border-color: #6486ff;
}

.site-nav a.active {
  background: #1b2350;
  border-color: #6486ff;
  color: #fff;
}

.device-shell {
  max-width: var(--shell-max);
  min-height: calc(100vh - 52px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  box-shadow: 0 0 0 1px rgba(13, 31, 74, 0.08), 0 24px 60px -28px rgba(13, 31, 74, 0.45);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px var(--pad-x);
  background: var(--chrome);
  color: var(--on-primary);
}

.brands {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.logo {
  height: 32px;
  width: auto;
  object-fit: contain;
  background: #fff;
  border-radius: 4px;
  padding: 2px 8px;
}

.topbar-meta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--header-sub);
  white-space: nowrap;
}

.page-header {
  background: var(--primary);
  color: var(--on-primary);
  padding: 22px var(--pad-x) 24px;
}

.page-header h1 {
  margin: 0;
  font-size: clamp(1.55rem, 2.4vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-header .subtitle {
  margin: 8px 0 0;
  font-size: 1rem;
  color: var(--header-sub);
  max-width: 42rem;
}

.page-header a {
  color: #7dd3fc;
  font-weight: 600;
}

.content {
  flex: 1;
  padding: 20px var(--pad-x) 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-content: start;
}

@media (min-width: 800px) {
  .content {
    grid-template-columns: minmax(280px, 1fr) minmax(320px, 1.15fr);
    gap: 18px;
    align-items: start;
  }

  .content > .banner,
  .content > noscript {
    grid-column: 1 / -1;
  }
}

.banner {
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 0.95rem;
  background: var(--surface);
  border: 1px solid var(--border);
}

.banner.err {
  border-color: rgba(214, 69, 69, 0.4);
  background: #fdecec;
  color: var(--err);
}

.hidden {
  display: none !important;
}

.card {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px 16px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 1px 0 rgba(13, 31, 74, 0.04);
}

.steps-card {
  grid-template-columns: 48px 1fr;
  grid-template-areas:
    "icon body"
    "photo photo";
}

.steps-card .card-icon {
  grid-area: icon;
}

.steps-card .card-body {
  grid-area: body;
}

.steps-card .device-photo {
  grid-area: photo;
  width: 100%;
  height: 180px;
  margin-top: 2px;
}

@media (min-width: 800px) {
  .steps-card {
    grid-template-columns: 48px 1fr;
    grid-template-areas:
      "icon body"
      ". photo";
  }

  .steps-card .device-photo {
    height: 220px;
  }
}

.card.install-card {
  grid-template-columns: 48px 1fr;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--on-primary);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.card-icon.accent {
  background: var(--accent);
}

.card-body {
  min-width: 0;
}

.card-body h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.device-photo {
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--soft);
}

.steps {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.steps li {
  margin-bottom: 8px;
}

.steps li:last-child {
  margin-bottom: 0;
}

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

.row {
  margin-bottom: 14px;
}

.row-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 560px) {
  .row-split {
    grid-template-columns: 1fr;
  }
}

label,
.installed .label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--soft);
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.98rem;
}

.installed {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding-top: 20px;
}

.mono {
  font-family: var(--mono);
  font-size: 0.92rem;
}

.hint {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.15em;
}

.status-line {
  margin: 0 0 14px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--soft);
  font-size: 0.92rem;
  color: var(--muted);
  min-height: 1.1rem;
}

.status-line.ok {
  border-color: rgba(31, 157, 85, 0.35);
  background: var(--ok-soft);
  color: var(--ok);
}

.status-line.err {
  border-color: rgba(214, 69, 69, 0.4);
  background: #fdecec;
  color: var(--err);
}

.ack {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 16px 0 18px;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--muted);
  cursor: pointer;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

.ack input {
  margin-top: 4px;
  width: auto;
  flex-shrink: 0;
  accent-color: var(--primary);
}

.install-btn {
  width: 100%;
  min-height: 52px;
  padding: 12px 18px;
  border: none;
  border-radius: 12px;
  font-family: var(--sans);
  font-size: 1.08rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--on-primary);
  background: var(--accent);
  transition: transform 0.12s ease, opacity 0.12s ease, background 0.12s ease;
}

.install-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.install-btn:not(:disabled):hover {
  background: #0b87d6;
  transform: translateY(-1px);
}

button.linkish {
  border: none;
  background: none;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

.progress {
  margin-top: 16px;
  height: 10px;
  border-radius: 999px;
  background: var(--soft);
  overflow: hidden;
  display: none;
}

.progress.visible {
  display: block;
}

.progress > div {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  transition: width 0.2s ease;
}

.log-details {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--muted);
}

.log-details summary {
  cursor: pointer;
  user-select: none;
  font-weight: 600;
}

.log {
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--nav-idle);
  color: #f9fafb;
  border: 1px solid #1f2937;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.45;
  max-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
}

.bottombar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px var(--pad-x);
  background: var(--chrome);
}

.nav-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  background: var(--nav-idle);
  color: #fff;
  text-align: center;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.2;
  flex: 1 1 auto;
}

@media (min-width: 800px) {
  .nav-chip {
    flex: 0 1 auto;
    min-width: 140px;
  }
}

.nav-chip.active {
  background: var(--accent);
  border-color: var(--accent);
}

.nav-chip.muted {
  opacity: 0.75;
  border-style: dashed;
}

.compare-newer {
  color: var(--ok);
  font-weight: 600;
}

.compare-older {
  color: var(--warn);
}