:root {
  --blue: #60A5FA;
  --blue-dark: #2563EB;
  --ink: #1f2937;
  --muted: #6b7280;
  --bg: #f6f9fc;
  --card: #ffffff;
  --border: #e6eaf0;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 32px 20px 72px; }

.brand { font-weight: 800; color: var(--blue-dark); letter-spacing: -0.02em; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px 30px;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.04);
}

h1 { font-size: 28px; margin: 0 0 4px; letter-spacing: -0.02em; }
h2 { font-size: 18px; margin: 28px 0 8px; color: var(--blue-dark); }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 8px; }
p, li { font-size: 15.5px; }
ul { padding-left: 20px; margin: 8px 0; }
li { margin-bottom: 6px; }
a { color: var(--blue-dark); }
.muted { color: var(--muted); }

.back {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 14px;
  text-decoration: none;
  color: var(--blue-dark);
}
.back:hover { text-decoration: underline; }

.controller {
  background: #eef6ff;
  border: 1px solid #d6e9ff;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 14px;
  margin: 16px 0 4px;
}

footer { text-align: center; color: var(--muted); font-size: 13px; padding: 26px 16px; }

@media (max-width: 520px) {
  .card { padding: 20px; border-radius: 14px; }
  h1 { font-size: 24px; }
}

/* ---- Landing page ---- */
.hero { text-align: center; padding: 8px 0 4px; }
.logo {
  width: 112px; height: 112px; border-radius: 28px;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.18);
  margin: 6px auto 14px; display: block;
}
.appname { font-size: 38px; font-weight: 800; letter-spacing: -0.03em; color: var(--blue-dark); margin: 0; }
.tagline { font-size: 18px; color: var(--ink); margin: 6px 0 0; }
.lead { font-size: 15.5px; color: var(--muted); max-width: 560px; margin: 14px auto 0; }

.pill {
  display: inline-block; margin-top: 18px;
  background: #eef6ff; color: var(--blue-dark);
  border: 1px solid #d6e9ff; border-radius: 999px;
  padding: 7px 16px; font-size: 14px; font-weight: 600;
}

.features {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
  margin-top: 26px;
}
.feature {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 16px; text-align: left;
}
.feature .emoji { font-size: 22px; }
.feature .ft { font-weight: 700; margin: 6px 0 2px; font-size: 15px; }
.feature .fd { color: var(--muted); font-size: 13.5px; margin: 0; }

.trust {
  margin-top: 22px; background: #f0fbf4; border: 1px solid #cdeedd;
  border-radius: 14px; padding: 16px 18px; text-align: left;
}
.trust b { color: #15803d; }
.trust p { margin: 4px 0 0; font-size: 14px; color: var(--ink); }

.linkrow { margin-top: 26px; }
.linkrow a {
  display: inline-block; margin: 0 8px; font-weight: 600; text-decoration: none;
}

@media (max-width: 520px) {
  .features { grid-template-columns: 1fr; }
  .appname { font-size: 32px; }
  .logo { width: 96px; height: 96px; }
}