:root {
  --color-accent: #2f6feb;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-text: #16181d;
  --color-text-muted: #5b6270;
  --color-border: #e3e5ea;

  --esp-tools-button-color: var(--color-accent);
  --esp-tools-button-text-color: #ffffff;
  --esp-tools-button-border-radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg-alt);
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.hero { text-align: center; margin-bottom: 32px; }
.hero-logo { display: block; margin: 0 auto 16px; }
.hero h1 { font-size: 28px; font-weight: 700; margin: 0 0 8px; }
.hero-sub { color: var(--color-text-muted); font-size: 16px; line-height: 1.5; margin: 0 auto; max-width: 520px; }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 20px;
}

.firmware-card-badges { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }

.apple-home-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 12px 4px 8px;
  color: var(--color-text);
}
.apple-home-badge-icon { width: 18px; height: 18px; }
.apple-home-badge-text { display: flex; flex-direction: column; line-height: 1.1; font-size: 12px; }
.apple-home-badge-text small { color: var(--color-text-muted); font-size: 10px; }

.firmware-card h2 { margin: 0 0 4px; font-size: 18px; }
.firmware-version { color: var(--color-text-muted); font-size: 14px; margin: 0 0 16px; }

.caveats { margin: 0 0 24px; padding-left: 20px; color: var(--color-text-muted); font-size: 14px; line-height: 1.6; }

.install-row { text-align: center; }
esp-web-install-button { display: inline-block; }
esp-web-install-button[hidden] { display: none; }

.unsupported-note, .firmware-error {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text-muted);
}
.firmware-error { color: #b3261e; }
.firmware-error[hidden] { display: none; }

.steps-card ol { padding-left: 20px; line-height: 1.7; }
.steps-card code {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 13px;
}

.faq { margin-top: 32px; }
.faq h2 { font-size: 18px; margin-bottom: 8px; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-question::after { content: '+'; font-weight: 300; font-size: 20px; color: var(--color-text-muted); }
.faq-question[aria-expanded="true"]::after { content: '\2212'; }
.faq-answer { padding: 0 0 16px; color: var(--color-text-muted); font-size: 14px; line-height: 1.6; }
.faq-answer p { margin: 0; }

.footer { margin-top: 40px; text-align: center; font-size: 12px; color: var(--color-text-muted); }
.footer a { color: var(--color-text-muted); }
.footer p { margin: 4px 0; }

a { color: var(--color-accent); }

@media (max-width: 480px) {
  .page { padding: 32px 16px 48px; }
  .card { padding: 20px; }
}