:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --brand: #7c3aed;
  --brand-soft: #ede9fe;
  --danger: #ef4444;
  --danger-soft: #fee2e2;
  --ok: #10b981;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--brand);
  text-decoration: none;
  margin-bottom: 28px;
}

.brand img { width: 36px; height: 36px; border-radius: 10px; }

h1 { font-size: 26px; line-height: 1.25; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 28px 0 8px; }
p, li { color: var(--muted); font-size: 15px; }
ul { padding-left: 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-top: 20px;
}

label { display: block; font-size: 14px; font-weight: 600; margin: 14px 0 6px; }

input[type="email"], input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 500; color: var(--muted); }
.check input { margin-top: 4px; }

button {
  width: 100%;
  margin-top: 18px;
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 700;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: var(--brand);
  cursor: pointer;
}

button.danger { background: var(--danger); }
button.secondary { background: transparent; color: var(--muted); border: 1px solid var(--border); }
button:disabled { opacity: .6; cursor: default; }

.msg { margin-top: 16px; padding: 12px 14px; border-radius: 12px; font-size: 14px; }
.msg.error { background: var(--danger-soft); color: #991b1b; }
.msg.ok { background: #d1fae5; color: #065f46; }

[hidden] { display: none !important; }

footer { margin-top: 40px; font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }