:root {
  --ink: #111111;
  --paper: #ffffff;
  --red: #c8102e;
  --muted: #737373;
  --line: #d7d7d7;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif; }
button, input { font: inherit; }

.login-body {
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(200, 16, 46, .05), transparent 45%),
    var(--paper);
  color: var(--ink);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 20px;
}

.login-panel {
  width: min(100%, 470px);
  padding: clamp(34px, 7vw, 64px);
  border: 1px solid var(--ink);
  background: rgba(255, 255, 255, .96);
}

.login-eyebrow {
  margin: 0 0 18px;
  color: var(--red);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .18em;
}

.login-panel h1 {
  margin: 0;
  font-size: clamp(48px, 13vw, 76px);
  font-weight: 800;
  letter-spacing: -.075em;
  line-height: .82;
}

.login-note,
.login-error {
  margin: 34px 0 24px;
  font-size: 13px;
  line-height: 1.7;
}

.login-note { color: var(--muted); }
.login-error { color: var(--red); font-weight: 700; }

.login-form { display: grid; gap: 22px; }
.login-form label { display: grid; gap: 8px; }
.login-form label span { font-size: 9px; font-weight: 700; letter-spacing: .18em; }
.login-form input {
  width: 100%;
  padding: 12px 2px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  outline: 0;
  background: transparent;
}
.login-form input:focus { border-color: var(--ink); }
.login-form button {
  margin-top: 10px;
  padding: 15px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: white;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
}
.login-form button:hover,
.login-form button:focus-visible { background: var(--red); border-color: var(--red); }

@media (max-width: 520px) {
  .login-panel { padding: 36px 26px; }
}