/* An author letter, using the game's paper, ink, and station-sign typography. */
.info-shell { max-width: 800px; margin: 0 auto; padding: 0 28px; }
.info-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 20px; padding: 22px 0; border-bottom: 1px solid var(--rule); font-size: .84rem; }
.info-top a { display: inline-flex; align-items: center; min-height: 36px; }
.info-langs { display: flex; flex-wrap: wrap; gap: 16px; }
.info-langs [aria-current] { font-weight: 700; text-decoration-thickness: 2px; }
.info-head { padding: 38px 0 26px; border-top: 5px solid var(--ink); margin-top: 18px; }
.info-kicker { margin: 0 0 18px; font: 600 .76rem var(--font-num); letter-spacing: .12em; }
.info-kicker span { color: var(--stamp); margin: 0 8px; }
.info-head h1 { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.7rem, 5vw, 2.7rem); line-height: 1.45; margin: 0 0 18px; letter-spacing: .01em; }
:lang(zh-Hant) .info-head h1 { font-family: var(--font-body); font-weight: 700; }
.info-intro { max-width: 42em; color: var(--ink-soft); margin: 0; line-height: 1.9; }
#feedback-form { border: 1px solid var(--rule); border-top: 3px solid var(--ink); background: var(--surface); padding: 26px; }
#feedback-fields { border: 0; padding: 0; margin: 0; min-width: 0; }
.info-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.info-field { margin-bottom: 24px; min-width: 0; }
.info-field label { display: block; font-weight: 700; margin-bottom: 8px; font-size: .9rem; }
.info-field label small { color: var(--ink-soft); font-weight: 400; font-size: .75rem; margin-left: 10px; }
.info-field input, .info-field select, .info-field textarea { display: block; width: 100%; min-height: 46px; border: 1px solid var(--rule); border-radius: 0; padding: 11px 12px; font: inherit; font-size: 16px; color: var(--ink); background: var(--surface); }
.info-field textarea { resize: vertical; line-height: 1.8; }
.info-field [aria-invalid="true"] { border-color: var(--stamp); }
.field-hint { margin: 6px 0 0; color: var(--ink-soft); font-size: .78rem; }
.info-privacy { font-size: .78rem; color: var(--ink-soft); border-top: 1px dashed var(--rule); padding-top: 16px; margin: 0 0 20px; }
#feedback-submit { min-height: 48px; display: flex; gap: 28px; align-items: center; justify-content: space-between; }
#feedback-submit:disabled { opacity: .65; cursor: wait; }
.feedback-trap { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.feedback-error { color: var(--stamp); font-weight: 700; }
.feedback-success { border: 1px solid var(--rule); background: var(--surface); padding: 32px; }
.success-mark { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 2px solid var(--ok); border-radius: 50%; color: var(--ok); font-size: 1.4rem; }
.feedback-success h2 { font-size: 1.3rem; }
.about-sections > section { display: grid; grid-template-columns: 42px 1fr; gap: 18px; border-top: 1px solid var(--rule); padding: 24px 0; }
.section-no { font: 600 1.2rem var(--font-num); color: var(--stamp); padding-top: 2px; }
.about-sections h2 { font-size: 1.1rem; margin: 0 0 12px; }
.about-sections p { margin: 0 0 12px; line-height: 1.95; }
.source-links { font-size: .83rem; color: var(--ink-soft); }
.info-foot { margin-top: 36px; padding: 18px 0 30px; border-top: 2px solid var(--ink); }
.info-foot p { font-size: .75rem; color: var(--ink-soft); }
@media (max-width: 520px) {
  .info-shell { padding: 0 18px; }
  .info-top { gap: 4px 16px; padding: 12px 0; }
  .info-langs { gap: 14px; }
  .info-head { padding-top: 26px; }
  .info-kicker { font-size: .65rem; letter-spacing: .07em; }
  #feedback-form { padding: 20px 16px; }
  .info-row { grid-template-columns: 1fr; gap: 0; }
  #feedback-submit { width: 100%; }
  .about-sections > section { grid-template-columns: 26px 1fr; gap: 10px; }
}