:root {
  --bg: #eef2f7;
  --ink: #0f172a;
  --muted: #475569;
  --primary: #1565c0;
  --primary-2: #0f4c9e;
  --line: #d8e0ea;
  --card: rgba(255, 255, 255, 0.88);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Manrope, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 10%, #ffffff, var(--bg) 42%);
  min-height: 100vh;
}

.bg-shape {
  position: fixed;
  border-radius: 999px;
  filter: blur(26px);
  z-index: -1;
}

.bg-shape-a {
  width: 330px;
  height: 330px;
  right: -80px;
  top: -110px;
  background: #bfdbfe;
}

.bg-shape-b {
  width: 260px;
  height: 260px;
  left: -80px;
  bottom: -90px;
  background: #dbeafe;
}

.topbar {
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 20px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand strong {
  display: block;
  font: 700 14px "Space Grotesk", sans-serif;
}

.brand span {
  display: block;
  font-size: 12px;
  color: var(--muted);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 12px 20px 28px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  backdrop-filter: blur(6px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
  padding: 22px;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 6px 0 8px;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.05;
}

.tag {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid #bcd3ef;
  color: var(--primary-2);
  background: #edf5ff;
  font-size: 12px;
  font-weight: 700;
}

.lead {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
}

.cta-row,
.contact-row {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.meta {
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

h2 {
  margin: 0 0 12px;
  font-size: 21px;
  font-family: "Space Grotesk", sans-serif;
}

ul,
ol {
  margin: 0;
  padding-left: 18px;
  color: #243244;
}

li + li {
  margin-top: 8px;
}

.install-note {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  background: #eef6ff;
  color: #1e3552;
  font-size: 14px;
}

.video-copy {
  margin: 0 0 12px;
  color: var(--muted);
}

.install-video {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #000;
  max-height: 560px;
}

.first-config ol {
  margin-bottom: 12px;
}

.video-placeholder {
  border: 1px dashed #9bb8dd;
  background: #f4f8ff;
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: #27466a;
}

.video-placeholder strong {
  font-size: 14px;
}

.video-placeholder span {
  font-size: 13px;
}

details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
  padding: 10px 12px;
}

details + details {
  margin-top: 8px;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin: 8px 0 0;
  color: var(--muted);
}

.btn {
  text-decoration: none;
  border-radius: 12px;
  padding: 11px 16px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.12s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 8px 18px rgba(21, 101, 192, 0.26);
}

.btn-secondary,
.btn-ghost {
  color: var(--primary-2);
  border-color: #aec8e8;
  background: #fff;
}

.btn-secondary:hover,
.btn-ghost:hover {
  background: #f2f8ff;
}

@media (max-width: 820px) {
  .grid {
    grid-template-columns: 1fr;
  }
}