:root {
  --bg: #edf2f5;
  --ink: #14212b;
  --muted: #667787;
  --panel: #ffffff;
  --line: #d5e0de;
  --accent: #0f6e56;
  --danger: #b42318;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 20% -10%, #d9ebe4 0%, transparent 60%),
    radial-gradient(700px 380px at 100% 0%, #d7e4ef 0%, transparent 55%),
    var(--bg);
}
a { color: var(--accent); text-decoration: none; }
.wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
}
.card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid #cfdbe3;
  border-radius: 24px;
  padding: 28px 22px;
  box-shadow: 0 18px 40px rgba(20, 33, 43, 0.08);
}
.brand {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
h1 { margin: 0 0 8px; font-size: 28px; letter-spacing: -0.03em; }
.sub { margin: 0 0 22px; color: var(--muted); line-height: 1.5; font-size: 14px; }
label {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--muted);
}
input, select {
  width: 100%;
  border: 1px solid #cfdbe3;
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}
button {
  width: 100%;
  border: 0;
  border-radius: 999px;
  padding: 13px 16px;
  font: inherit;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button.secondary {
  background: #e8eef2;
  color: var(--ink);
  margin-top: 10px;
}
.error { color: var(--danger); font-size: 13px; margin: 8px 0 0; }
.ok { color: var(--accent); font-size: 13px; margin: 8px 0 0; }
.links {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
}
.hint-box {
  background: #f3f7f9;
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.5;
}
.hint-box span { color: var(--muted); display: block; margin-bottom: 4px; font-size: 12px; }