* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: #1d2733;
  background: #f4f7f9;
}

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

.panel {
  width: 100%;
  max-width: 420px;
  padding: 28px;
  background: #ffffff;
  border: 1px solid #d9e1e8;
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(27, 42, 57, 0.08);
}

.brand {
  color: #28666e;
  font-weight: 700;
  margin-bottom: 10px;
}

h1 {
  margin: 0 0 12px;
  font-size: 28px;
  line-height: 1.2;
}

.muted {
  color: #5f6f7d;
  line-height: 1.5;
}

.error {
  padding: 10px 12px;
  color: #7d1d1d;
  background: #ffe8e8;
  border: 1px solid #f3b6b6;
  border-radius: 6px;
}

.form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: #344554;
  font-size: 14px;
  font-weight: 700;
}

input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid #bdc9d4;
  border-radius: 6px;
  font: inherit;
}

input:focus {
  outline: 2px solid #7bb2bd;
  outline-offset: 1px;
}

button {
  height: 42px;
  padding: 0 16px;
  border: 0;
  border-radius: 6px;
  color: #ffffff;
  background: #28666e;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #1f535a;
}