:root {
  color-scheme: light;
  --ground: #f7f4ed;
  --paper: #fffdf8;
  --paper-alt: #eeebe3;
  --ink: #302e29;
  --muted: #6d695f;
  --accent: #794a4b;
  --rule: #d8d1c4;
  --input-line: #938b7d;
  --error: #a02e2b;
  --serif: "Songti SC", "STSong", "SimSun", "Times New Roman", serif;
  --sans: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 16px/1.75 var(--sans); -webkit-text-size-adjust: 100%; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
button, a { touch-action: manipulation; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
::selection { color: var(--paper); background: var(--accent); }
.page-shell { width: min(1080px, calc(100% - 96px)); margin-inline: auto; }
.prototype-banner { padding: 5px 16px; color: var(--muted); background: var(--paper-alt); text-align: center; font-size: 13px; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 5; padding: 12px 18px; background: var(--paper); }
.skip-link:focus { top: 8px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 106px; border-bottom: 1px solid var(--rule); }
.wordmark { display: flex; align-items: baseline; gap: 20px; }
.wordmark-name { font: 700 26px/1.4 var(--serif); white-space: nowrap; letter-spacing: .06em; }
.wordmark-edition { color: var(--muted); font-size: 13px; }
nav { display: flex; gap: 32px; align-items: center; }
nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: 15px; }
nav a[aria-current], nav a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 8px; text-decoration-thickness: 1px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 28px; min-height: 50px; padding: 12px 23px; border: 1px solid var(--accent); border-radius: 0; background: var(--accent); color: var(--paper); font-size: 15px; }
.button:hover { background: var(--ink); border-color: var(--ink); }
.button:disabled { opacity: .6; }
.text-link { display: inline-flex; align-items: center; gap: 16px; min-height: 44px; padding: 0; border: 0; background: none; color: var(--accent); font-size: inherit; }
.text-link:hover, .secondary-link:hover, .back-link:hover, .footer-links a:hover { text-decoration: underline; text-underline-offset: 5px; }

/* One open volume: the introduction leads straight into its first letter. */
.opening { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 72px; padding: 46px 0 40px; align-items: center; }
.opening h1 { font: 500 64px/1.3 var(--serif); letter-spacing: -.035em; }
.opening-lead { margin: 22px 0 26px; color: var(--muted); font-size: 19px; line-height: 1.95; }
.campus-photo { margin: 0; min-width: 0; }
.campus-photo picture { display: block; }
.campus-photo img { display: block; width: 100%; height: auto; background: var(--paper-alt); color: var(--muted); font: 400 13px/1.7 var(--sans); }
.campus-photo figcaption { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4px 12px; margin-top: 9px; color: var(--muted); font: 400 13px/1.7 var(--serif); }
.opening-photo { width: 320px; justify-self: end; align-self: end; }
.opening-photo img { aspect-ratio: 960 / 638; object-fit: contain; object-position: center top; }
.opening-photo figcaption { font-family: var(--sans); }
.campus-interlude { max-width: 540px; margin: 36px 0 42px 162px; }
.campus-interlude img { object-fit: contain; object-position: center; }
.interlude-sunlit-desk img { aspect-ratio: 3 / 2; }
.interlude-teaching-building { max-width: 666px; }
.interlude-teaching-building img { aspect-ratio: 16 / 9; }
.interlude-football { margin-left: 0; }
.interlude-football img { aspect-ratio: 960 / 519; }
.wall-section { max-width: 900px; margin-inline: auto; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; border-top: 1px solid var(--ink); padding-top: 20px; }
.section-heading h2 { display: flex; align-items: center; gap: 14px; font: 600 26px/1.5 var(--serif); }
.edition-imprint { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border: 1px solid var(--accent); color: var(--accent); font: 500 13px/1 var(--serif); }
.section-note { font-size: 13px; color: var(--muted); }
.demo-note { margin-top: 10px; font-size: 13px; color: var(--muted); }
.letter { display: grid; grid-template-columns: 126px minmax(0, 1fr); gap: 36px; padding: 42px 0 40px; border-bottom: 1px solid var(--rule); }
.letter-number { display: flex; align-items: baseline; gap: 5px; padding-top: 2px; color: var(--muted); font: 400 13px/1.9 var(--serif); white-space: nowrap; }
.letter-index { color: var(--accent); font: 400 28px/1 var(--serif); font-variant-numeric: lining-nums tabular-nums; }
.letter-reading { min-width: 0; max-width: 666px; }
.message-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.letter-origin { color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
.demo-label { flex-shrink: 0; color: var(--muted); font-size: 13px; }
.message-body { margin: 23px 0 28px; font: 400 19px/2 var(--serif); white-space: pre-wrap; overflow-wrap: anywhere; }
.message-body.is-collapsed { display: -webkit-box; -webkit-line-clamp: 7; -webkit-box-orient: vertical; overflow: hidden; }
.message-bottom { display: flex; align-items: end; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 13px; }
.letter-signature { margin-left: auto; text-align: right; }
.letter-signature .message-name { font: 500 19px/1.8 var(--serif); color: var(--ink); }
.letter-signature time { display: inline-block; margin-top: 7px; padding-top: 5px; border-top: 1px solid var(--rule); font-variant-numeric: tabular-nums; }
.signature-class { margin-top: 2px; }
.expand-button { align-self: center; flex-shrink: 0; font-size: 14px; }
.wall-ending { padding: 48px 0 54px; text-align: center; }
.wall-ending > p { font: 500 26px/1.6 var(--serif); }
.wall-ending .ending-postscript { margin-top: 8px; color: var(--muted); font: 400 13px/1.8 var(--serif); }
.wall-ending .text-link { margin-top: 14px; font-size: 15px; }
.wall-ending .section-note { margin-top: 20px; font: 400 13px/1.75 var(--sans); }
.wall-ending .photo-credit { max-width: 36em; margin: 16px auto 0; color: var(--muted); font: 400 13px/1.8 var(--sans); }

.site-footer { display: flex; align-items: start; justify-content: space-between; gap: 40px; padding-block: 32px 38px; border-top: 1px solid var(--rule); margin-top: 24px; }
.footer-signature > p { font: 500 19px/1.6 var(--serif); }
.footer-signature > span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.footer-signature .publication-reference { margin-top: 14px; color: var(--accent); font: 400 13px/1.75 var(--serif); font-variant-numeric: lining-nums tabular-nums; }
.footer-details { color: var(--muted); font-size: 13px; }
.footer-links { display: flex; gap: 24px; margin-top: 6px; align-items: center; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-links .text-link { color: var(--muted); }

/* The body comes first; optional details live at the foot of the letter. */
.writing-layout { display: grid; grid-template-columns: minmax(0, 732px) minmax(0, 220px); column-gap: 64px; padding-block: 24px 40px; }
.writing-intro { grid-column: 1 / -1; padding-bottom: 34px; }
.back-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); font-size: 14px; }
.writing-intro h1 { margin-top: 14px; font: 500 42px/1.4 var(--serif); letter-spacing: -.035em; }
.writing-intro > p { margin-top: 14px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.writing-paper { grid-column: 1; grid-row: 2; background: var(--paper); padding: 32px 38px 34px; border-top: 2px solid var(--accent); }
.writing-prompts { grid-column: 2; grid-row: 2; padding-top: 34px; }
.writing-prompts h2 { font-size: 14px; font-weight: 500; margin-bottom: 20px; }
.writing-prompts p { margin-top: 16px; font: 400 15px/1.9 var(--serif); color: var(--muted); }
.margin-signoff { display: block; margin-top: 44px; font: 500 15px/1.9 var(--serif); color: var(--accent); }
.letter-destination { display: flex; align-items: baseline; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--rule); }
.letter-destination > span { flex-shrink: 0; color: var(--accent); font-size: 13px; }
.letter-destination > p { font: 500 18px/1.7 var(--serif); }
.paper-note { margin-block: 16px 26px; color: var(--muted); font-size: 13px; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 24px; }
.form-field { min-width: 0; }
.form-field > label { display: block; margin-bottom: 8px; font-size: 15px; }
.form-field label > span { margin-left: 6px; font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], textarea { width: 100%; min-width: 0; border: 1px solid var(--input-line); border-radius: 0; background: var(--paper); color: var(--ink); padding: 11px 12px; font-size: 16px; line-height: 1.7; }
input[type="text"] { min-height: 52px; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
textarea { display: block; resize: vertical; min-height: 310px; padding: 17px 18px; font: 400 18px/2 var(--serif); }
.field-caption { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 13px; margin-top: 8px; }
.field-caption p:last-child { white-space: nowrap; font-variant-numeric: tabular-nums; }
.field-error { font-size: 13px; color: var(--error); }
.field-error:not(:empty) { margin-top: 6px; }
[aria-invalid="true"] { border-color: var(--error); }
.over-limit { color: var(--error); }
.letter-fields { margin: 30px 0 0; padding: 12px 0 0; border: 0; min-width: 0; }
.letter-fields legend { padding: 0; font: 600 19px/1.7 var(--serif); }
.optional-note { margin-left: 8px; color: var(--muted); font: 400 13px/1.75 var(--sans); }
.letter-fields .field-grid { gap: 12px 24px; }
.letter-fields .form-field { display: grid; grid-template-columns: 64px minmax(0, 1fr); column-gap: 12px; align-items: center; }
.letter-fields label { display: flex; align-items: center; min-height: 52px; margin: 0; font-size: 14px; }
.letter-fields input { border: 0; border-bottom: 1px solid var(--input-line); background: transparent; padding: 8px 2px; font: 400 17px/1.9 var(--serif); }
.letter-fields input:focus { border-bottom: 2px solid var(--accent); }
.letter-fields input[aria-invalid="true"] { border-bottom: 2px solid var(--error); }
.letter-fields .field-error { grid-column: 2; }
.publication-note { margin-top: 28px; font-size: 13px; color: var(--muted); }
.publication-note p:first-child { color: var(--ink); font-weight: 500; font-size: 15px; margin-bottom: 6px; }
.consent-field { margin-top: 20px; }
.checkbox-label { display: flex; align-items: start; gap: 12px; min-height: 44px; cursor: pointer; font-size: 14px; }
.checkbox-label input { flex-shrink: 0; width: 20px; height: 20px; margin: 3px 0 0; accent-color: var(--accent); }
.form-submit { margin-top: 24px; }
.form-submit > p { margin-top: 12px; color: var(--muted); font-size: 13px; }
.form-submit .public-reminder { margin: 0 0 14px; color: var(--ink); font-size: 14px; }
.form-feedback:not(:empty) { margin-top: 16px; font-size: 14px; color: var(--error); }

.success-layout { max-width: 900px; padding-top: 44px; }
.success-paper { max-width: 732px; background: var(--paper); padding: 40px 48px; border-top: 2px solid var(--accent); }
.success-receipt { color: var(--accent); font-size: 13px; margin-bottom: 24px; }
.success-paper h1 { font: 500 46px/1.4 var(--serif); letter-spacing: -.035em; }
.success-lead { margin-top: 22px; font: 400 20px/1.95 var(--serif); }
.success-demo { margin: 28px 0; padding-block: 18px; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.success-demo strong { font-size: 14px; font-weight: 500; }
.success-demo p { margin-top: 8px; font-size: 14px; color: var(--muted); }
.secondary-link { display: inline-flex; min-height: 44px; align-items: center; margin-left: 24px; font-size: 14px; }
.success-footnote { margin-top: 22px; color: var(--muted); font-size: 13px; }
.success-signoff { padding: 28px 0 20px; text-align: right; font: 500 20px/1.9 var(--serif); }
.success-signoff > span { font-size: 13px; color: var(--muted); }
.success-close { display: flex; align-items: center; justify-content: space-between; gap: 20px; max-width: 732px; padding: 28px 0 20px; }
.success-close .success-signoff { padding: 0; }
.success-memory { flex: 0 0 200px; }
.success-memory img { aspect-ratio: 320 / 178; object-fit: contain; object-position: center; }

/* The admin keeps the same clear tool layout. */
[hidden] { display: none !important; }
.wall-empty { padding: 40px 0; color: var(--muted); }
.wall-empty .empty-title { color: var(--ink); font: 400 22px/1.8 var(--serif); margin-bottom: 12px; }
.wall-more { margin-block: 20px; }
.admin-login { max-width: 480px; margin-top: 36px; }
.admin-login h2 { font: 500 24px/1.7 var(--serif); }
.admin-login > p { color: var(--muted); margin-block: 12px 24px; }
.admin-login input { width: 100%; min-height: 48px; }
.admin-login button { margin-top: 20px; }
.admin-toolbar { display: flex; gap: 24px; margin-top: 24px; }
.admin-page { padding-top: 24px; }
.admin-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.admin-heading h1 { font: 500 42px/1.5 var(--serif); margin: 12px 0; }
.admin-heading p { color: var(--muted); }
.admin-heading .admin-identity { font-size: 13px; padding-bottom: 4px; }
.notice { padding: 22px 24px; background: var(--paper-alt); }
.admin-notice { margin-top: 30px; }
.notice strong { font-weight: 500; }
.notice p { color: var(--muted); font-size: 14px; margin-top: 6px; }
.admin-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.filter-button { border: 0; border-radius: 0; color: var(--muted); background: transparent; min-height: 48px; padding: 10px 22px; font-size: 15px; }
.filter-button span { margin-left: 8px; font-variant-numeric: tabular-nums; }
.filter-button.is-active { background: var(--ink); color: var(--paper); }
.filter-button:not(.is-active):hover { background: var(--paper-alt); }
.admin-result-count { color: var(--muted); font-size: 13px; margin: 22px 0 12px; }
.admin-messages { display: grid; gap: 16px; }
.admin-message { display: grid; grid-template-columns: minmax(0, 1fr) 100px; gap: 48px; padding: 28px 32px; background: var(--paper); }
.admin-message .message-name { font: 600 20px/1.65 var(--serif); overflow-wrap: anywhere; }
.message-meta { color: var(--muted); font-size: 13px; margin-top: 5px; overflow-wrap: anywhere; }
.admin-message .message-body { margin: 20px 0; max-width: 750px; font: 400 16px/1.9 var(--sans); }
.admin-actions { display: flex; flex-direction: column; gap: 10px; align-items: stretch; }
.pin-marker { color: var(--accent); font-size: 13px; }
.pin-order-form { display: grid; gap: 8px; width: 100%; font-size: 14px; }
.pin-order-form input { width: 100%; min-width: 0; min-height: 44px; padding: 8px; border: 1px solid var(--input-line); border-radius: 0; color: var(--ink); background: var(--paper); font-size: 16px; }
.pin-order-hint { color: var(--muted); font-size: 13px; line-height: 1.7; }
.status-label { font-size: 14px; text-align: center; margin-bottom: 12px; }
.status-rejected { color: var(--error); }
.button-small { min-height: 44px; padding: 8px 16px; font-size: 14px; }
.admin-actions .button:disabled { opacity: 1; color: var(--muted); background: var(--paper-alt); border-color: var(--rule); }
.moderation-note { background: var(--paper-alt); color: var(--muted); font-size: 14px; padding: 12px 16px; margin-top: 16px; }

dialog { max-width: 560px; max-height: calc(100dvh - 48px); width: calc(100% - 40px); overflow: auto; border: 1px solid var(--rule); padding: 0; background: var(--paper); color: var(--ink); }
dialog::backdrop { background: rgb(48 46 41 / .45); }
.dialog-content { padding: 32px; }
.dialog-content h2 { font: 600 26px/1.5 var(--serif); margin-bottom: 20px; }
.dialog-content > p { margin: 14px 0; font-size: 15px; }
.dialog-content form { margin-top: 24px; }

@media (max-width: 1000px) {
  .page-shell { width: calc(100% - 56px); }
  .wordmark { flex-direction: column; gap: 2px; }
  .opening { grid-template-columns: minmax(0, 1fr) 260px; gap: 24px; padding-block: 32px; }
  .opening-photo { width: 260px; }
  .opening h1 { font-size: 42px; }
  .opening-lead { font-size: 17px; }
  .campus-interlude { margin-left: 128px; }
  .interlude-football { margin-left: 0; }
  .letter { grid-template-columns: 100px minmax(0, 1fr); gap: 28px; }
  .writing-layout { grid-template-columns: minmax(0, 1fr) 170px; column-gap: 32px; }
  .writing-paper { padding-inline: 26px; }
  .field-grid { gap: 16px; }
}

@media (max-width: 640px) {
  .page-shell { width: calc(100% - 40px); }
  .site-header { min-height: 90px; gap: 12px; }
  .wordmark-name { font-size: 23px; }
  .wordmark-edition { font-size: 13px; }
  nav { gap: 18px; flex-shrink: 0; }
  nav a { font-size: 15px; }
  .opening { display: block; padding: 20px 0; }
  .opening h1 { font-size: clamp(32px, 9.7vw, 42px); line-height: 1.4; }
  .opening-lead { margin: 16px 0 20px; font-size: 15px; line-height: 1.9; }
  .desktop-break { display: none; }
  .opening-photo { width: min(268px, 100%); margin: 20px 0 0 auto; }
  .opening-photo figcaption { margin-top: 7px; gap: 4px 8px; }
  .campus-interlude { max-width: none; margin: 28px 0 30px; }
  .button { min-height: 48px; padding: 11px 20px; gap: 24px; }
  .section-heading { padding-top: 16px; gap: 10px; }
  .section-heading h2 { font-size: 23px; flex-shrink: 0; }
  .section-note { font-size: 13px; }
  .demo-note { margin-top: 10px; font-size: 13px; line-height: 1.8; }
  .letter { display: block; padding: 26px 0 30px; }
  .letter-number { margin-bottom: 12px; font-size: 13px; padding: 0; }
  .letter-index { font-size: 24px; }
  .letter-reading { max-width: none; }
  .message-heading { gap: 12px; }
  .letter-origin { font-size: 13px; }
  .message-body { margin: 18px 0 24px; font-size: 18px; line-height: 1.95; }
  .letter-signature .message-name { font-size: 18px; }
  .wall-ending { padding-block: 32px; }
  .wall-ending > p { font-size: 23px; }
  .site-footer { flex-direction: column; gap: 22px; padding-block: 26px; margin-top: 16px; }
  .footer-signature > p { font-size: 18px; }
  .writing-layout { display: flex; flex-direction: column; padding-top: 12px; padding-bottom: 24px; }
  .writing-intro { order: 0; padding-bottom: 24px; }
  .writing-intro h1 { font-size: clamp(28px, 8.5vw, 36px); margin-top: 8px; }
  .writing-intro > p { margin-top: 12px; font-size: 14px; }
  .writing-paper { order: 1; padding: 24px 18px; margin-inline: -6px; }
  .letter-destination { gap: 12px; padding-bottom: 16px; }
  .letter-destination > p { font-size: 17px; }
  .paper-note { margin-block: 14px 22px; }
  textarea { min-height: 300px; padding: 12px; font-size: 18px; }
  .field-grid { grid-template-columns: 1fr; gap: 18px; }
  .field-caption { font-size: 13px; gap: 8px; }
  .letter-fields { margin-top: 26px; }
  .letter-fields legend { font-size: 19px; }
  .form-submit .button { width: 100%; }
  .writing-prompts { order: 2; padding: 26px 0 4px; }
  .writing-prompts h2 { margin-bottom: 12px; }
  .writing-prompts p { margin-top: 8px; font-size: 14px; }
  .margin-signoff { margin-top: 22px; }
  .success-layout { padding-top: 24px; }
  .success-paper { padding: 28px 22px; margin-inline: -6px; }
  .success-receipt { margin-bottom: 22px; }
  .success-paper h1 { font-size: 34px; }
  .success-lead { font-size: 18px; margin-top: 20px; }
  .success-demo { margin-block: 24px; }
  .secondary-link { margin-left: 18px; }
  .success-signoff { padding-block: 24px 8px; font-size: 18px; }
  .success-close { padding: 24px 0 8px; gap: 16px; }
  .success-memory { flex-basis: 140px; }
  .admin-page { padding-top: 12px; }
  .admin-heading { flex-direction: column; align-items: start; gap: 12px; }
  .admin-heading h1 { font-size: 32px; }
  .admin-heading p { font-size: 15px; }
  .admin-notice { margin-top: 20px; }
  .notice { padding: 18px; }
  .admin-filters { gap: 4px; margin-top: 24px; }
  .filter-button { padding: 10px 12px; font-size: 14px; }
  .filter-button span { margin-left: 4px; }
  .admin-message { grid-template-columns: 1fr; gap: 20px; padding: 24px; }
  .admin-actions { flex-direction: row; align-items: center; flex-wrap: wrap; gap: 8px; }
  .status-label { margin: 0 auto 0 0; }
  .button-small { padding-inline: 12px; }
  .dialog-content { padding: 24px; }
  .dialog-content h2 { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}