:root {
  color-scheme: light;
  --bg: #eef2f5;
  --surface: #ffffff;
  --ink: #17201d;
  --muted: #64716b;
  --line: #d8e0e5;
  --green: #1f7a4d;
  --green-dark: #10231d;
  --red: #a4443d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(22, 34, 29, 0.12);
}

.eyebrow,
label span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.06em;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
}

.intro {
  margin: 12px 0 22px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
}

input {
  width: 100%;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(31, 122, 77, 0.24);
  border-color: var(--green);
}

button {
  height: 44px;
  border: 0;
  border-radius: 8px;
  background: var(--green-dark);
  color: #fff;
  font: inherit;
  font-weight: 760;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.message {
  min-height: 20px;
  margin: 0;
  color: var(--red);
  font-size: 13px;
  line-height: 1.4;
}