/* ログイン / OTP 画面 — 進捗ダッシュボードと同系の紺テーマ */
:root {
  --navy: #1f3a5f;
  --navy-light: #2d5080;
  --border: #d6dae0;
  --muted: #5a6573;
  --red: #c62828;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
.login-body {
  font-family: "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  background: linear-gradient(135deg, #1f3a5f 0%, #2d5080 100%);
  color: #222;
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px;
}
.login-card {
  background: #fff; border-radius: 14px; padding: 34px 32px 28px;
  width: 100%; max-width: 380px; box-shadow: 0 12px 40px rgba(0,0,0,.3);
}
.login-card h1 { font-size: 20px; color: var(--navy); margin: 0 0 4px; }
.login-card .sub { font-size: 12.5px; color: var(--muted); margin: 0 0 20px; }
.login-card form { display: flex; flex-direction: column; gap: 14px; }
.login-card label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; font-weight: 700; color: var(--navy); }
.login-card input {
  font-family: inherit; font-size: 15px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
}
.login-card input:focus { outline: none; border-color: var(--navy-light); box-shadow: 0 0 0 3px rgba(45,80,128,.15); }
.login-card button {
  font-family: inherit; font-size: 15px; font-weight: 700; cursor: pointer;
  background: var(--navy); color: #fff; border: none; border-radius: 8px; padding: 12px; margin-top: 4px;
}
.login-card button:hover { background: var(--navy-light); }
.login-card .err {
  background: #fdecea; color: var(--red); border: 1px solid #f3c0bb;
  border-radius: 8px; padding: 9px 12px; font-size: 13px; margin: 0 0 16px;
}
.login-card .note { font-size: 11.5px; color: var(--muted); margin: 16px 0 0; line-height: 1.6; }
.login-card .note a { color: var(--navy-light); }