/* ログイン画面 — 測量野帳の一葉に見立てる */

body.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
}

.sheet-wrap { width: 100%; max-width: 420px; }

.card {
  position: relative;
  padding: 34px 32px 26px;
  box-shadow: var(--shadow-paper);
}

/* 四隅の見当合わせ */
.corner {
  position: absolute;
  width: 11px;
  height: 11px;
  border: 0 solid var(--vermilion);
  opacity: 0.75;
}
.corner.tl { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.corner.tr { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.corner.bl { bottom: -1px; left: -1px; border-bottom-width: 2px; border-left-width: 2px; }
.corner.br { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

.brand {
  display: flex;
  align-items: baseline;
  gap: 9px;
  text-decoration: none;
  color: inherit;
  margin-bottom: 26px;
}
.brand .logo {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.brand .logo em { font-style: normal; color: var(--vermilion); }
.brand .sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: var(--ink-4);
}

.card h1 {
  font-size: 25px;
  margin: 6px 0 10px;
}
.card .overline { margin: 0; font-size: 10px; }
.lead {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-2);
}

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin-bottom: 6px;
}
input[type="email"], input[type="text"] { width: 100%; }
.btn.wide {
  width: 100%;
  justify-content: center;
  margin-top: 14px;
  padding: 13px 18px;
}
.btn[disabled] { opacity: 0.5; }

/* コードは1文字ずつ読めるように大きく字間を空ける */
.code-input {
  font-family: var(--font-mono);
  font-size: 27px;
  letter-spacing: 0.42em;
  text-align: center;
  padding: 12px 10px 12px 20px;   /* letter-spacing のぶん右に寄るのを戻す */
}
.code-input::placeholder { color: var(--rule); letter-spacing: 0.42em; }

.sub-actions {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--ink-3);
  text-align: center;
}
.linkish {
  font: inherit;
  color: var(--vermilion-dim);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.linkish:hover { color: var(--vermilion); }
.linkish[disabled] { color: var(--ink-4); text-decoration: none; cursor: default; }
.dot { color: var(--rule); margin: 0 6px; }

.notice, .error {
  font-size: 12.5px;
  line-height: 1.7;
  padding: 11px 13px;
  border-radius: 2px;
  margin: 0 0 20px;
}
.notice {
  background: var(--paper-dim);
  border-left: 3px solid var(--survey);
  color: var(--ink-2);
}
.notice a { font-weight: 500; }
.error {
  margin: 18px 0 0;
  background: var(--vermilion-wash);
  border-left: 3px solid var(--vermilion);
  color: var(--vermilion-dim);
}
.notice[hidden], .error[hidden] { display: none; }

.how {
  margin-top: 26px;
  padding-top: 16px;
  border-top: 1px solid var(--rule-soft);
  font-size: 12px;
  color: var(--ink-2);
}
.how summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-3);
}
.how summary:hover { color: var(--ink); }
.how p { margin: 10px 0 0; line-height: 1.8; }

.legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 18px;
  margin-top: 20px;
  font-size: 11px;
}
.legal a { color: var(--ink-3); text-decoration: none; }
.legal a:hover { color: var(--vermilion); text-decoration: underline; }

@media (max-width: 420px) {
  .card { padding: 26px 20px 20px; }
  .card h1 { font-size: 22px; }
  .code-input { font-size: 23px; letter-spacing: 0.3em; padding-left: 16px; }
}