* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: #17202a;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  background: linear-gradient(135deg, #0e4860, #236f72 58%, #f2b84b);
}

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

.login-panel {
  width: min(420px, 100%);
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 8px;
  padding: 32px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 48px rgba(8, 29, 43, 0.26);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #ffffff;
  font-weight: 800;
  background: #0f5f6b;
}

.brand-title {
  font-size: 20px;
  font-weight: 750;
}

.brand-subtitle {
  margin-top: 4px;
  color: #667380;
  font-size: 13px;
}

.login-form {
  display: grid;
  gap: 10px;
}

.login-form label {
  color: #394b59;
  font-size: 13px;
  font-weight: 650;
}

.login-form input {
  width: 100%;
  min-height: 44px;
  border: 1px solid #c8d2dc;
  border-radius: 6px;
  padding: 10px 12px;
  color: #17202a;
  font-size: 15px;
  background: #ffffff;
}

.login-form input:focus {
  outline: 2px solid rgba(15, 95, 107, 0.22);
  border-color: #0f5f6b;
}

.login-form button {
  min-height: 44px;
  margin-top: 8px;
  border: 0;
  border-radius: 6px;
  color: #ffffff;
  font-size: 15px;
  font-weight: 750;
  background: #0f5f6b;
  cursor: pointer;
}

.login-form button:hover {
  background: #0b4c55;
}

.message {
  min-height: 20px;
  margin-top: 8px;
  color: #50606f;
  font-size: 13px;
}

.message.error {
  color: #b42318;
}