:root {
  --bg: #f5f7f8;
  --card: #ffffff;
  --line: #e3e8ec;
  --text: #1f2a30;
  --muted: #6b7a85;
  --primary: #0e9f8e;
  --primary-dark: #0b8a7b;
  --red: #e0574a;
  --shadow: 0 1px 2px rgba(16, 35, 48, 0.04), 0 18px 48px rgba(16, 35, 48, 0.10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: #030906;
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* 黑客帝国数字雨：铺满窗口、压在卡片下面 */
.matrix-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  background: #030906;
}

.login-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid rgba(74, 255, 140, 0.35);
  border-radius: 16px;
  padding: 26px 26px 20px;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(0, 255, 120, 0.08), 0 0 40px rgba(0, 255, 120, 0.10);
  backdrop-filter: blur(2px);
}

.login-head { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.logo {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 11px;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  box-shadow: 0 8px 18px rgba(14, 159, 142, 0.3), 0 0 16px rgba(0, 255, 120, 0.28);
  flex: none;
}
.login-head h1 { margin: 0; font-size: 17px; letter-spacing: 0.2px; }
.login-head .sub { margin: 3px 0 0; font-size: 11px; color: var(--muted); }

form { display: block; }

.field { display: block; margin-bottom: 14px; }
.field span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14, 159, 142, 0.12);
}

.msg {
  min-height: 18px;
  margin: 0 0 10px;
  font-size: 12px;
  color: var(--muted);
}
.msg.bad { color: var(--red); }

.btn-login {
  width: 100%;
  height: 40px;
  border: 0;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-login:hover { background: var(--primary-dark); }
.btn-login:disabled { opacity: 0.7; cursor: default; }

.login-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  flex-wrap: wrap;
}

@media (max-width: 420px) {
  .login-card { padding: 22px 18px 18px; }
  .login-foot { justify-content: center; }
}