:root {
  --bg: #f4f6f8;
  --ink: #16202a;
  --muted: #657384;
  --line: #d8e0e8;
  --panel: #ffffff;
  --brand: #1769ff;
  --brand-dark: #0d4bc2;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(23, 105, 255, 0.08), transparent 38%),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.login-panel {
  width: min(100%, 420px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
  box-shadow: 0 24px 70px rgba(22, 32, 42, 0.12);
}

.brand {
  margin-bottom: 34px;
}

.brand-logo {
  width: 126px;
  height: auto;
  display: block;
}

.intro {
  margin-bottom: 26px;
}

.intro h1 {
  margin: 0 0 7px;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: 0;
}

.intro p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.login-form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 7px;
}

.field label {
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.field input {
  width: 100%;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 13px;
  color: var(--ink);
  background: #fff;
  font: inherit;
  outline: none;
}

.field input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(23, 105, 255, 0.14);
}

button {
  height: 48px;
  border: 0;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 750;
}

button:hover {
  background: var(--brand-dark);
}

button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.message {
  min-height: 18px;
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.message.error {
  color: var(--danger);
}

.forgot-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.forgot-link:hover {
  color: var(--brand);
}

@media (max-width: 520px) {
  .login-shell {
    align-items: start;
    padding: 18px;
  }

  .login-panel {
    margin-top: 28px;
    padding: 26px;
  }
}