:root {
  --bg: #0b1220;
  --bg2: #0f1a2e;
  --card: #111d33;
  --line: #1e2d4a;
  --fg: #e8f5ee;
  --muted: #8fa6b8;
  --p: #2ecc71;
  --p-dark: #22a85b;
  --danger: #e74c3c;
}

html[data-theme="light"] {
  --bg: #f4f8f5;
  --bg2: #ffffff;
  --card: #ffffff;
  --line: #dfe7e2;
  --fg: #12211a;
  --muted: #5b6b63;
  --p: #16a34a;
  --p-dark: #128a3e;
  --danger: #d64534;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a { color: var(--p); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 18px; }

.nav {
  background: var(--bg2);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; gap: 8px; align-items: center; font-weight: 700; color: var(--fg); }
.brand .logo { color: var(--p); font-size: 1.2rem; }
.nav-links { display: flex; gap: 14px; align-items: center; }
.nav-links a { color: var(--fg); }
.who { color: var(--muted); }
.theme-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg);
  border-radius: 8px;
  padding: 4px 9px;
  cursor: pointer;
  font-size: 1rem;
}

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  font-size: .95rem;
}
.btn-p { background: var(--p); color: #04160c; }
.btn-p:hover { background: var(--p-dark); text-decoration: none; }
.btn-line { border-color: var(--line); color: var(--fg); background: transparent; }
.btn-line:hover { text-decoration: none; background: var(--bg2); }
.btn-lg { padding: 13px 24px; font-size: 1.05rem; }

main.wrap { padding-top: 34px; padding-bottom: 60px; }

.hero { text-align: center; padding: 38px 0 26px; }
.hero h1 { font-size: 2.2rem; margin: 0 0 12px; }
.accent { color: var(--p); }
.lead { color: var(--muted); max-width: 640px; margin: 0 auto 22px; font-size: 1.08rem; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin-top: 34px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}
.card h3 { margin: .4rem 0 .3rem; }
.card p { margin: 0; color: var(--muted); }
.ico { font-size: 1.7rem; }

.muted { color: var(--muted); }

.auth { max-width: 420px; margin: 20px auto; }
.auth h1 { margin-bottom: 4px; }

.form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: .92rem; }
.form input {
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 13px;
  color: var(--fg);
  font-size: 1rem;
  font-family: inherit;
}
.form input:focus { outline: 2px solid var(--p); border-color: transparent; }
.form .btn { margin-top: 4px; }

.alert { border-radius: 10px; padding: 12px 16px; margin-bottom: 18px; border: 1px solid; }
.alert.ok { background: rgba(46, 204, 113, .12); border-color: var(--p); }
.alert.err { background: rgba(231, 76, 60, .12); border-color: var(--danger); }

.panel-head h1 { margin-bottom: 2px; }

.foot {
  color: var(--muted);
  font-size: .85rem;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  padding-bottom: 30px;
  margin-top: 20px;
}

@media (max-width: 560px) {
  .nav-links .who { display: none; }
  .hero h1 { font-size: 1.7rem; }
}