:root {
  --login-bg: #eef2f7;
  --login-panel: #ffffff;
  --login-border: #d8dee8;
  --login-text: #111827;
  --login-sub: #6b7280;
  --login-accent: #1e4f8f;
  --login-accent-strong: #163f73;
  --login-danger: #b91c1c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--login-text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(219, 228, 240, 0.94)),
    var(--login-bg);
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    "Yu Gothic",
    "Meiryo",
    "Noto Sans JP",
    "Microsoft YaHei",
    sans-serif;
}

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

.login-panel {
  width: min(380px, 100%);
  padding: 26px;
  border: 1px solid var(--login-border);
  border-radius: 10px;
  background: var(--login-panel);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.14);
}

.login-role-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin-bottom: 20px;
  padding: 4px;
  border: 1px solid #d7e0ec;
  border-radius: 10px;
  background: #eef3f9;
}

.login-role-tab {
  min-width: 0;
  height: 38px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: #42536b;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  cursor: pointer;
}

.login-role-tab.is-active {
  background: var(--login-accent-strong);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(22, 63, 115, 0.24);
}

.login-role-tab:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.2);
  outline-offset: 2px;
}

.login-brand {
  margin-bottom: 20px;
}

.login-brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0;
}

.login-brand p {
  margin: 4px 0 0;
  color: var(--login-sub);
  font-size: 13px;
}

.login-label {
  display: block;
  margin: 12px 0 6px;
  color: #374151;
  font-size: 13px;
  font-weight: 700;
}

.login-input {
  width: 100%;
  height: 42px;
  padding: 0 11px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  color: var(--login-text);
  font-size: 15px;
  outline: none;
}

.login-input:focus {
  border-color: var(--login-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.login-error {
  min-height: 20px;
  margin: 12px 0 8px;
  color: var(--login-danger);
  font-size: 13px;
}

.login-button {
  width: 100%;
  height: 42px;
  border: 0;
  border-radius: 6px;
  background: var(--login-accent-strong);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.login-button:hover {
  background: #123760;
}

.login-button:disabled {
  opacity: 0.65;
  cursor: default;
}