:root {
  color-scheme: light;
  --bg: #f4f8f8;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: #ffffff;
  --text: #1f2a2b;
  --muted: #5b6b6d;
  --line: rgba(64, 136, 144, 0.18);
  --accent: #408890;
  --accent-strong: #366466;
  --accent-soft: rgba(64, 136, 144, 0.12);
  --shadow: 0 20px 48px rgba(31, 42, 43, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(64, 136, 144, 0.16), transparent 24rem),
    radial-gradient(circle at right top, rgba(54, 100, 102, 0.14), transparent 20rem),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.layout {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0 4rem;
}

.hero {
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent-strong);
}

h1,
h2 {
  margin-top: 0;
  font-family: Arial, sans-serif;
  font-weight: 600;
}

h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.2rem, 4vw, 3.9rem);
  line-height: 1.02;
  max-width: 14ch;
}

.lead,
.hint,
li,
dd,
dt,
a,
code {
  font-size: 1rem;
}

.lead {
  max-width: 58ch;
  color: var(--muted);
  line-height: 1.6;
}

.panel,
.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel-strong);
}

.panel {
  display: inline-flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-top: 1.5rem;
  padding: 1.25rem;
}

.hint p {
  margin: 0 0 0.6rem;
  color: var(--muted);
  font-weight: 400;
}

.target-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.target-list li {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--accent-soft);
  font-weight: 400;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  padding: 1.3rem;
}

.card h2 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.meta-list {
  margin: 0;
}

.meta-list div + div {
  margin-top: 0.85rem;
}

dt {
  color: var(--muted);
  font-weight: 400;
}

dd {
  margin: 0.2rem 0 0;
  font-weight: 400;
}

.downloads,
ol {
  margin: 0;
  padding-left: 1.2rem;
}

.downloads li,
ol li {
  color: var(--text);
  font-weight: 400;
  line-height: 1.55;
}

.downloads li + li,
ol li + li {
  margin-top: 0.55rem;
}

a {
  color: var(--accent-strong);
  font-weight: 400;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

code {
  padding: 0.1rem 0.3rem;
  border-radius: 0.35rem;
  background: var(--accent-soft);
  font-weight: 400;
}

esp-web-install-button::part(button) {
  border: 0;
  border-radius: 8px;
  padding: 0.95rem 1.45rem;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  cursor: pointer;
}

esp-web-install-button::part(button):hover {
  background: linear-gradient(135deg, var(--accent-strong) 0%, #2f5658 100%);
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .layout {
    width: min(100% - 1rem, 46rem);
    padding-top: 1rem;
  }

  .hero,
  .card {
    padding: 1.1rem;
  }
}