:root {
  color-scheme: light;
  --ink: #20211f;
  --muted: #666962;
  --paper: #f5f1e8;
  --surface: #fffdf8;
  --line: #d8d0c0;
  --accent: #9b4a32;
  --accent-dark: #773522;
  --error: #9d2d28;
  --success: #41624a;
  font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--paper); }
body { margin: 0; color: var(--ink); }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button, .button, input, textarea, select { border-radius: 0; }

.admin-body {
  min-height: 100dvh;
  background:
    linear-gradient(90deg, transparent 0 69%, rgba(155, 74, 50, 0.055) 69% 70%, transparent 70%),
    var(--paper);
}
.admin-header {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 36px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
}
.admin-header .wordmark { font-weight: 760; text-decoration: none; letter-spacing: -.04em; }
.admin-header p { margin: 0; color: var(--muted); font-size: 13px; }
.admin-header-actions { display: flex; align-items: center; gap: 20px; }
.admin-header-actions form { margin: 0; }
.logout-button { padding: 0; border: 0; color: var(--muted); background: transparent; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.logout-button:hover { color: var(--ink); }
.admin-main { max-width: 1180px; margin: 0 auto; padding: 72px 36px 96px; }
.page-heading { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 56px; margin-bottom: 56px; }
.page-heading h1 { max-width: 720px; margin: 6px 0 12px; font-size: clamp(38px, 6vw, 68px); line-height: .98; letter-spacing: -.065em; }
.page-heading p:not(.eyebrow) { max-width: 620px; margin: 0; color: var(--muted); line-height: 1.75; }
.eyebrow, .section-index { margin: 0; color: var(--accent); font: 700 11px/1.2 ui-monospace, "Cascadia Mono", monospace; letter-spacing: .16em; }
.card-page .section-index { color: var(--card-accent); }
.back-link { display: inline-block; margin-bottom: 32px; color: var(--muted); font-size: 14px; text-underline-offset: 4px; }

.button {
  min-height: 44px;
  padding: 12px 18px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s ease, background-color .18s ease, border-color .18s ease;
}
.button:hover { border-color: var(--ink); }
.button:active { transform: translateY(1px); }
.button.primary { color: #fffaf2; background: var(--accent); border-color: var(--accent); }
.button.primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.button.secondary { background: var(--surface); border-color: var(--line); }
.button.ghost { border-color: transparent; }

.card-list { border-top: 1px solid var(--ink); }
.card-row { padding: 24px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 32px; }
.card-row-main { display: grid; grid-template-columns: 90px minmax(120px, .7fr) 1fr; align-items: center; gap: 24px; }
.card-row h2 { margin: 0; font-size: 20px; letter-spacing: -.025em; }
.card-row p { margin: 0; color: var(--muted); font-size: 14px; }
.card-row-actions { display: flex; gap: 18px; font-size: 14px; }
.card-row-actions a { text-underline-offset: 4px; }
.status { width: fit-content; padding: 5px 8px; border: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.status-published { color: var(--success); border-color: #9eb3a3; }
.status-disabled { color: var(--error); border-color: #d5aaa5; }
.empty-state { max-width: 620px; padding: 50px 0; border-top: 1px solid var(--ink); }
.empty-state h2 { margin: 12px 0; font-size: 32px; letter-spacing: -.04em; }
.empty-state > p:last-of-type { color: var(--muted); line-height: 1.7; }
.text-link { display: inline-block; margin-top: 16px; color: var(--accent); text-underline-offset: 5px; }

.notice { margin: -20px 0 32px; padding: 15px 18px; border-left: 3px solid; background: var(--surface); }
.notice.success { border-color: var(--success); color: var(--success); }
.notice.error { border-color: var(--error); color: var(--error); }
.link-panel { margin-bottom: 40px; padding: 22px 0; border-block: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 28px; }
.field-label { margin: 0 0 8px; font-size: 13px; font-weight: 700; }
.public-url { max-width: 760px; display: block; overflow-wrap: anywhere; color: var(--accent); line-height: 1.5; text-underline-offset: 4px; }
.muted { margin: 0; color: var(--muted); line-height: 1.6; }
.admin-form { display: grid; gap: 46px; }
.admin-form fieldset { min-width: 0; padding: 28px 0 0; border: 0; border-top: 1px solid var(--ink); }
.admin-form legend { padding: 0 28px 0 0; font-size: 20px; font-weight: 720; letter-spacing: -.025em; }
.admin-form legend span { margin-right: 12px; color: var(--accent); font: 700 11px/1 ui-monospace, "Cascadia Mono", monospace; }
.form-grid { display: grid; gap: 28px; }
.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field-block { margin-top: 26px; display: grid; align-content: start; gap: 9px; }
.field-block label { font-size: 14px; font-weight: 720; }
.field-label-row { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; }
.inline-action { padding: 0; border: 0; color: var(--accent); background: transparent; font-size: 12px; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.inline-action:disabled { color: var(--muted); cursor: not-allowed; opacity: .6; }
.field-block input, .field-block textarea, .field-block select {
  width: 100%;
  border: 1px solid #bcb4a4;
  padding: 13px 14px;
  color: var(--ink);
  background: var(--surface);
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.field-block textarea { min-height: 170px; resize: vertical; line-height: 1.75; }
.field-block input:focus, .field-block textarea:focus, .field-block select:focus { border-color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.field-block [aria-invalid="true"] { border-color: var(--error); }
.field-help, .field-error { margin: 0; font-size: 12px; line-height: 1.55; }
.field-help { color: var(--muted); }
.field-error { color: var(--error); }
.compact-field { max-width: 540px; }
.wide-field { grid-column: 1 / -1; }
.optional-label { margin-left: 8px; color: var(--muted); font-size: 11px; font-weight: 500; }
.scene-pack-preview { margin-top: 30px; padding: 26px 0; border-block: 1px solid var(--line); display: grid; grid-template-columns: minmax(180px, .6fr) 1.4fr; gap: 40px; }
.scene-pack-preview[hidden], .scene-question-group[hidden] { display: none; }
.scene-preview-heading h3, .scene-question-heading h3 { margin: 8px 0 0; font-size: 22px; letter-spacing: -.035em; }
.scene-pack-preview dl { margin: 0; }
.scene-pack-preview dl div { padding: 11px 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: 90px 1fr; gap: 18px; }
.scene-pack-preview dl div:first-child { border-top: 0; }
.scene-pack-preview dt { color: var(--accent); font-size: 12px; }
.scene-pack-preview dd { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.theme-choice-preview { margin-top: 30px; padding: 24px 0; border-block: 1px solid var(--line); display: grid; grid-template-columns: 156px minmax(0, 1fr); align-items: center; gap: 32px; }
.theme-choice-preview[hidden] { display: none; }
.theme-choice-preview h3 { margin: 7px 0 7px; font-size: 24px; letter-spacing: -.035em; }
.theme-choice-preview p:last-child { max-width: 42em; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.theme-choice-swatch { height: 86px; padding: 13px; border: 1px solid var(--line); display: grid; grid-template-columns: 1fr .42fr; grid-template-rows: 1fr .38fr; gap: 5px; background: var(--surface); transition: background-color .25s ease, border-color .25s ease; }
.theme-choice-swatch span { display: block; background: var(--preview-ink, #20211f); }
.theme-choice-swatch span:first-child { grid-row: 1 / -1; background: var(--preview-accent, #9b4a32); }
.theme-choice-swatch span:last-child { opacity: .45; }
.theme-choice-preview[data-theme="romantic_cinema"] { --preview-paper: #202124; --preview-ink: #d7c9bb; --preview-accent: #a75f4a; }
.theme-choice-preview[data-theme="warm_scrapbook"] { --preview-paper: #eee2ce; --preview-ink: #43372d; --preview-accent: #a4563d; }
.theme-choice-preview[data-theme="playful_growth"] { --preview-paper: #f2f0e5; --preview-ink: #1f2b23; --preview-accent: #536907; }
.theme-choice-preview[data-theme="elegant_ceremony"] { --preview-paper: #fffcf0; --preview-ink: #100f0c; --preview-accent: #87570a; }
.theme-choice-preview[data-theme] .theme-choice-swatch { border-color: color-mix(in srgb, var(--preview-ink) 32%, transparent); background: var(--preview-paper); }
.scene-question-area { margin-top: 36px; }
.scene-question-group { padding-top: 28px; border-top: 1px solid var(--line); }
.form-actions { display: flex; gap: 12px; }
.photo-section { margin-top: 72px; padding-top: 30px; border-top: 1px solid var(--ink); }
.photo-section-heading { display: grid; grid-template-columns: 1fr minmax(240px, 420px); align-items: end; gap: 36px; }
.photo-section-heading h2 { margin: 8px 0 0; font-size: 32px; letter-spacing: -.045em; }
.photo-section-heading > p { margin: 0; color: var(--muted); line-height: 1.6; }
.photo-notice { margin: 28px 0 0; }
.photo-upload-form { margin-top: 30px; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 24px; }
.photo-drop-field { min-width: 0; padding: 24px; border: 1px dashed #a89f8d; background: rgba(255, 253, 248, .58); display: grid; gap: 10px; }
.photo-drop-field label { font-weight: 720; }
.photo-drop-field input[type="file"] { width: 100%; color: var(--muted); }
.photo-drop-field input[type="file"]::file-selector-button { min-height: 40px; margin-right: 14px; padding: 8px 14px; border: 1px solid var(--line); color: var(--ink); background: var(--surface); cursor: pointer; }
.photo-selection-status { margin: 0; color: var(--accent); font-size: 13px; }
.photo-preview-grid { margin-top: 30px; display: grid; grid-template-columns: 1.35fr .65fr; grid-auto-rows: 170px; gap: 12px; }
.photo-preview-grid figure { min-width: 0; margin: 0; position: relative; overflow: hidden; background: #dfd8c9; }
.photo-preview-grid figure:first-child { grid-row: span 2; }
.photo-preview-grid img { width: 100%; height: 100%; display: block; object-fit: cover; }
.photo-preview-grid figcaption { position: absolute; inset: auto 0 0; padding: 10px 12px; color: #fffaf2; background: rgba(32, 33, 31, .74); font: 600 11px/1.4 ui-monospace, "Cascadia Mono", monospace; }
.photo-locked-note { margin: 14px 0 0; color: var(--muted); font-size: 12px; }
.share-preview-layout { margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--line); display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); align-items: start; gap: 30px; }
.share-preview-media { min-width: 0; }
.share-preview-layout img { width: 100%; height: auto; aspect-ratio: 1200 / 630; display: block; object-fit: cover; border: 1px solid var(--line); }
.share-preview-media .field-help { margin-top: 9px; }
.share-cover-placeholder { width: 100%; aspect-ratio: 1200 / 630; padding: 8%; border: 1px solid var(--line); display: grid; grid-template-columns: 1.4fr .6fr; grid-template-rows: 1fr .34fr; gap: 5%; background: #e9e1d2; }
.share-cover-placeholder span { background: #354139; }
.share-cover-placeholder span:first-child { grid-row: 1 / -1; background: var(--accent); }
.share-cover-placeholder span:last-child { opacity: .42; }
.share-preview-copy { padding-top: 18px; border-top: 1px solid var(--line); }
.share-preview-state { width: fit-content; margin: 8px 0 0; padding: 5px 8px; border: 1px solid #c6bdac; color: var(--muted); font-size: 11px; }
.share-preview-copy h3 { margin: 10px 0 16px; font-size: 24px; line-height: 1.25; letter-spacing: -.035em; overflow-wrap: anywhere; }
.share-preview-copy > p[data-share-preview-description] { margin: 0 0 22px; color: var(--muted); line-height: 1.7; overflow-wrap: anywhere; }
.share-preview-guidance { margin: 0; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.7; }
.share-preview-guidance strong { color: var(--ink); }

.card-page {
  --card-bg: #efede7;
  --card-surface: #f8f6f1;
  --card-text: #282927;
  --card-title: #282927;
  --card-body: #383a36;
  --card-muted: #676a64;
  --card-support: #676a64;
  --card-accent: #8c5a46;
  --card-signature: #744837;
  --card-line: color-mix(in srgb, var(--card-text) 22%, transparent);
  --card-width: 760px;
  --section-space: 88px;
  --display-font: "Microsoft YaHei UI", "PingFang SC", sans-serif;
  --reading-font: "STKaiti", "KaiTi", serif;
  --reveal-transform: translate3d(0, 22px, 0);
  --reveal-duration: 720ms;
  --card-radius-s: 6px;
  --card-radius-m: 10px;
  --card-panel: color-mix(in srgb, var(--card-surface) 82%, transparent);
  --card-shadow: 0 24px 64px color-mix(in srgb, var(--card-text) 9%, transparent);
  --type-kicker: clamp(13px, 3.5vw, 15px);
  --type-title: clamp(48px, 15vw, 88px);
  --type-section-label: clamp(16px, 4vw, 18px);
  --type-section-title: clamp(30px, 7.5vw, 44px);
  --type-body: clamp(18px, 4.6vw, 22px);
  --type-answer: clamp(19px, 4.8vw, 22px);
  --type-small: 16px;
  --type-footer: 13px;
  min-height: 100dvh;
  background-color: var(--card-bg);
  background-image: var(--card-background-image, none);
  color: var(--card-text);
  font: 400 16px/1.7 var(--display-font);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
.theme-atmosphere { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.atmosphere-shape { position: absolute; display: block; opacity: .55; }
.sound-dock {
  width: min(calc(100% - 36px), 480px);
  min-height: 64px;
  padding: 10px 12px 10px 16px;
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 3;
  border: 1px solid var(--card-line);
  border-radius: var(--card-radius-m);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  color: var(--card-text);
  background: color-mix(in srgb, var(--card-bg) 94%, transparent);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--card-text) 9%, transparent), 0 12px 32px color-mix(in srgb, var(--card-bg) 72%, transparent);
  backdrop-filter: blur(12px);
}
.sound-dock[hidden] { display: none; }
.sound-meta { min-width: 0; display: grid; gap: 4px; }
.sound-state { color: var(--card-accent); font-size: 12px; font-weight: 600; letter-spacing: .08em; }
.sound-track { overflow: hidden; color: var(--card-muted); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.sound-credit { color: var(--card-muted); font-size: 10px; line-height: 1.4; }
.sound-credit a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.sound-actions { display: flex; gap: 6px; }
.sound-button { min-height: 44px; padding: 8px 12px; border: 1px solid var(--card-line); border-radius: var(--card-radius-s); color: var(--card-text); background: transparent; cursor: pointer; font-size: 12px; transition: transform .18s ease, border-color .18s ease, background-color .18s ease; }
.sound-button:hover { border-color: var(--card-accent); background: color-mix(in srgb, var(--card-accent) 9%, transparent); }
.sound-button:focus-visible { outline: 2px solid var(--card-accent); outline-offset: 3px; }
.sound-button:active { transform: translateY(1px); }
.sound-button:disabled { cursor: not-allowed; opacity: .42; }
.sound-dock.is-playing .sound-state::before { content: ""; width: 6px; height: 6px; margin-right: 7px; border-radius: 50%; display: inline-block; background: var(--card-accent); animation: sound-pulse 1.8s ease-in-out infinite; }
.sound-dock.has-audio-error .sound-state { color: var(--card-muted); letter-spacing: 0; }
.card-stage { width: min(100%, var(--card-width)); min-height: 100dvh; margin: 0 auto; padding: max(48px, env(safe-area-inset-top)) 26px max(64px, env(safe-area-inset-bottom)); position: relative; z-index: 1; }
.scene-marker { position: absolute; top: 28px; right: 26px; display: grid; grid-template-columns: 34px 11px; gap: 5px; transform: rotate(-18deg); opacity: .68; }
.scene-marker span { height: 1px; background: var(--card-accent); }
.card-intro { min-height: 72dvh; padding: 14vh 0 64px; display: flex; flex-direction: column; justify-content: flex-end; border-bottom: 1px solid var(--card-line); position: relative; }
.intro-copy { display: flex; flex-direction: column; align-items: flex-start; }
.theme-emblem { width: 76px; height: 76px; margin-bottom: 42px; position: relative; }
.theme-emblem span { position: absolute; display: block; }
.scene-category, .theme-name { margin: 0; text-transform: uppercase; letter-spacing: .1em; font-size: var(--type-kicker); line-height: 1.5; }
.scene-category { color: var(--card-accent); }
.theme-name { margin-top: 8px; color: var(--card-support); }
.card-intro h1 { max-width: 12ch; margin: 40px 0 24px; color: var(--card-title); font: 600 var(--type-title)/.98 var(--display-font); letter-spacing: -.055em; text-wrap: balance; }
.opening { max-width: 30em; margin: 0 0 0 14%; color: var(--card-support); font: 400 var(--type-body)/1.8 var(--reading-font); text-wrap: pretty; }
.greeting-panel, .scene-answer-section, .memory-gallery, .core-interaction, .ending-panel {
  padding: var(--section-space) 0;
  border-bottom: 1px solid var(--card-line);
  position: relative;
}
.card-page .section-index {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--type-section-label);
  line-height: 1.35;
  font-weight: 600;
}
.card-page .section-index::after {
  content: "";
  width: 48px;
  height: 1px;
  display: block;
  background: var(--card-accent);
  opacity: .6;
}
.card-page h2 { max-width: 100%; margin: 20px 0 40px; color: var(--card-title); font: 600 var(--type-section-title)/1.2 var(--display-font); letter-spacing: -.035em; text-wrap: balance; }
.greeting-text { max-width: 28em; margin: 0; color: var(--card-body); white-space: pre-wrap; overflow-wrap: anywhere; font: 400 var(--type-body)/1.95 var(--reading-font); text-wrap: pretty; }
.signature { margin: 36px 0 0; color: var(--card-signature); text-align: right; font-size: clamp(17px, 4.2vw, 19px); font-weight: 500; line-height: 1.6; }
.scene-answer-list { margin: 0; }
.scene-answer-list div { padding: 24px 0; border-top: 1px solid color-mix(in srgb, var(--card-text) 15%, transparent); display: grid; grid-template-columns: minmax(216px, .44fr) minmax(0, 1fr); align-items: start; gap: 32px; }
.scene-answer-list dt { color: var(--card-accent); font-size: clamp(16px, 4vw, 18px); font-weight: 500; line-height: 1.6; }
.scene-answer-list dd { margin: 0; color: var(--card-body); white-space: pre-wrap; overflow-wrap: anywhere; font-size: var(--type-answer); line-height: 1.65; }
.memory-grid { display: grid; grid-template-columns: 1.3fr .7fr; grid-auto-rows: 190px; gap: 10px; }
.memory-grid figure { margin: 0; overflow: hidden; border-radius: var(--card-radius-s); background: var(--card-surface); }
.memory-grid figure:first-child { grid-row: span 2; }
.memory-grid img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform 800ms cubic-bezier(.22, 1, .36, 1), filter 800ms ease; }
.memory-grid figure:hover img { transform: scale(1.02); }
.memory-caption { max-width: 34em; margin: 24px 0 0; color: var(--card-support); font-size: var(--type-small); line-height: 1.8; }
.interaction-prompt { max-width: 34em; margin: -12px 0 32px; color: var(--card-support); font-size: var(--type-small); line-height: 1.8; text-wrap: pretty; }
.interaction-progress { margin-bottom: 28px; display: none; grid-template-columns: 1fr auto; align-items: center; gap: 16px; }
.interaction-ready .interaction-progress { display: grid; }
.interaction-progress-track { height: 2px; overflow: hidden; background: color-mix(in srgb, var(--card-text) 14%, transparent); }
.interaction-progress-track span { width: 100%; height: 100%; display: block; background: var(--card-accent); transform: scaleX(0); transform-origin: left center; transition: transform .5s cubic-bezier(.22, 1, .36, 1); }
.interaction-progress-label { color: var(--card-support); font: 600 12px/1.2 ui-monospace, "Cascadia Mono", monospace; }
[data-progress="1/2"] [data-interaction-progress] { transform: scaleX(.5); }
[data-progress="2/2"] [data-interaction-progress],
[data-progress="3/3"] [data-interaction-progress],
[data-progress="4/4"] [data-interaction-progress],
[data-progress="5/5"] [data-interaction-progress] { transform: scaleX(1); }
[data-progress="1/3"] [data-interaction-progress] { transform: scaleX(.333); }
[data-progress="2/3"] [data-interaction-progress] { transform: scaleX(.666); }
[data-progress="1/4"] [data-interaction-progress] { transform: scaleX(.25); }
[data-progress="2/4"] [data-interaction-progress] { transform: scaleX(.5); }
[data-progress="3/4"] [data-interaction-progress] { transform: scaleX(.75); }
[data-progress="1/5"] [data-interaction-progress] { transform: scaleX(.2); }
[data-progress="2/5"] [data-interaction-progress] { transform: scaleX(.4); }
[data-progress="3/5"] [data-interaction-progress] { transform: scaleX(.6); }
[data-progress="4/5"] [data-interaction-progress] { transform: scaleX(.8); }
.interaction-items { margin: 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.interaction-item { min-width: 0; padding: 22px 0; border-top: 1px solid color-mix(in srgb, var(--card-text) 16%, transparent); display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 18px; }
.interaction-ready .interaction-item[aria-hidden="true"] { display: none; }
.interaction-ready .interaction-item.is-revealed { animation: interaction-step-in .52s cubic-bezier(.22, 1, .36, 1) both; }
.interaction-step-marker { width: 36px; height: 36px; border: 1px solid var(--card-accent); border-radius: var(--card-radius-s); display: grid; place-items: center; color: var(--card-accent); font: 600 12px/1 ui-monospace, "Cascadia Mono", monospace; }
.interaction-item h3 { margin: 0 0 8px; color: var(--card-title); font: 600 20px/1.3 var(--display-font); letter-spacing: -.02em; }
.interaction-item p { margin: 0; color: var(--card-body); font-size: var(--type-small); line-height: 1.75; }
.interaction-action { min-height: 48px; margin-top: 28px; padding: 13px 20px; border: 1px solid var(--card-accent); border-radius: var(--card-radius-s); display: none; color: var(--card-bg); background: var(--card-accent); cursor: pointer; font-weight: 600; transition: transform .2s ease, color .2s ease, background-color .2s ease; }
.interaction-ready .interaction-action { display: inline-flex; align-items: center; justify-content: center; }
.interaction-action:hover { color: var(--card-accent); background: transparent; }
.interaction-action:focus-visible { outline: 2px solid var(--card-text); outline-offset: 4px; }
.interaction-action:active { transform: translateY(1px); }
.interaction-completion { margin: 28px 0 0; padding-top: 22px; border-top: 1px solid var(--card-accent); color: var(--card-text); font: 400 clamp(18px, 4vw, 22px)/1.8 var(--reading-font); }
.interaction-completion[hidden] { display: none; }
.core-interaction.is-complete .interaction-progress-label { color: var(--card-accent); }
.core-interaction.is-complete .interaction-action { color: var(--card-accent); background: transparent; }
.core-interaction.is-complete .interaction-completion { animation: interaction-complete-in .64s cubic-bezier(.22, 1, .36, 1) both; }
.interaction-live-status { width: 1px; height: 1px; margin: -1px; padding: 0; position: absolute; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.interaction-noscript { color: var(--card-support); font-size: 14px; }
.interaction-timeline .interaction-items { border-left: 1px solid var(--card-accent); padding-left: 24px; }
.interaction-timeline .interaction-item { border-top: 0; position: relative; }
.interaction-timeline .interaction-item::before { content: ""; width: 7px; height: 7px; position: absolute; left: -28px; top: 36px; border-radius: 50%; background: var(--card-accent); }
.interaction-draw .interaction-item { padding: 22px; border: 1px solid color-mix(in srgb, var(--card-text) 18%, transparent); background: color-mix(in srgb, var(--card-surface) 76%, transparent); }
.interaction-draw .interaction-item:nth-child(even) { transform: rotate(.35deg); }
.interaction-lights .interaction-step-marker { border-radius: 50%; background: color-mix(in srgb, var(--card-accent) 18%, transparent); box-shadow: inset 0 0 0 7px var(--card-bg); }
.interaction-journey .interaction-items { position: relative; }
.interaction-journey .interaction-item { border-top-style: dashed; }
.interaction-journey .interaction-step-marker { border-radius: 50%; }
.interaction-reveal .interaction-item { padding: 24px; border: 1px solid var(--card-line); box-shadow: inset 0 0 0 5px var(--card-bg), inset 0 0 0 6px color-mix(in srgb, var(--card-accent) 35%, transparent); }
.ending-panel { min-height: 62dvh; display: flex; flex-direction: column; justify-content: center; }
.ending-panel h2 { margin-bottom: 28px; }
.ending-text { max-width: 28em; margin: 0 0 0 14%; color: var(--card-body); font: 400 var(--type-answer)/1.9 var(--reading-font); text-wrap: pretty; }
.card-footer { padding-top: 32px; color: var(--card-support); font-size: var(--type-footer); letter-spacing: .06em; }
.offline-download { margin-top: 32px; padding: 24px; border: 1px solid var(--card-line); border-radius: var(--card-radius-s); background: var(--card-surface); color: var(--card-text); letter-spacing: 0; }
.offline-download h2 { margin: 0 0 8px; font-size: 20px; font-weight: 600; line-height: 1.3; }
.offline-download p { margin: 0 0 16px; font-size: 14px; line-height: 1.5; }
.offline-download small { display: block; margin-top: 12px; font-size: 12px; line-height: 1.5; color: var(--card-support); }
.offline-download-link { display: inline-flex; min-height: 44px; padding: 8px 16px; align-items: center; justify-content: center; border: 1px solid var(--card-accent); border-radius: var(--card-radius-s); background: var(--card-accent); color: var(--card-bg); text-decoration: none; font-size: 14px; font-weight: 600; transition: background-color .15s ease, color .15s ease; }
.offline-download-link:hover { background: transparent; color: var(--card-accent); }
.offline-download-link:focus-visible { outline: 2px solid var(--card-text); outline-offset: 4px; }
.offline-download-mobile { display: none; }
@media (max-width: 700px) { .offline-download { padding: 16px; } .offline-download-mobile { display: block; } }

@keyframes interaction-step-in {
  from { opacity: 0; transform: translate3d(0, 12px, 0); }
  to { opacity: 1; transform: none; }
}

@keyframes interaction-complete-in {
  from { opacity: 0; transform: translate3d(0, 10px, 0); }
  to { opacity: 1; transform: none; }
}

@keyframes sound-pulse {
  0%, 100% { opacity: .38; transform: scale(.82); }
  50% { opacity: 1; transform: scale(1); }
}

/*
 * A card must remain readable even when an embedded browser pauses JavaScript
 * during its first paint.  Do not use opacity as the initial state for whole
 * sections: a paused IntersectionObserver otherwise turns the entire card
 * into a blank screen.  The reveal hooks remain in the markup for compatible
 * clients, but content is now always paintable before script execution.
 */
.card-motion-ready [data-reveal] { opacity: 1; transform: none; }
html.card-force-paint .card-stage { transform: translateZ(.01px); }

.unavailable-page { min-height: 100dvh; padding: 24px; display: grid; place-items: center; background: var(--paper); }
.unavailable-panel { width: min(100%, 620px); padding: 44px 0; border-block: 1px solid var(--ink); }
.unavailable-panel h1 { margin: 12px 0 18px; font-size: clamp(34px, 8vw, 58px); line-height: 1.05; letter-spacing: -.055em; }
.unavailable-panel > p:last-child { max-width: 34em; margin: 0; color: var(--muted); line-height: 1.8; }

.login-body { min-height: 100dvh; background: var(--paper); }
.login-layout { width: min(100%, 1180px); min-height: 100dvh; margin: 0 auto; padding: 48px 36px; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(340px, .8fr); align-items: center; gap: clamp(70px, 12vw, 160px); }
.login-intro { align-self: end; padding-bottom: 12vh; }
.login-intro h1 { max-width: 8ch; margin: 14px 0 24px; font-size: clamp(48px, 7vw, 82px); line-height: .96; letter-spacing: -.065em; }
.login-intro > p:last-child { max-width: 34em; margin: 0; color: var(--muted); line-height: 1.75; }
.login-form { padding: 42px 0; border-block: 1px solid var(--ink); }
.login-form-heading h2 { margin: 10px 0 30px; font-size: 28px; letter-spacing: -.04em; }
.login-form .field-block { margin-top: 22px; }
.login-error { margin: 0 0 24px; }
.login-submit { width: 100%; margin-top: 30px; }

@media (max-width: 720px) {
  .admin-header { padding: 22px 18px; }
  .admin-header p { display: none; }
  .admin-header-actions { gap: 12px; }
  .admin-main { padding: 46px 18px 72px; }
  .page-heading { grid-template-columns: 1fr; align-items: start; gap: 26px; margin-bottom: 42px; }
  .page-heading h1 { font-size: 43px; }
  .page-heading .button { width: 100%; }
  .card-row, .card-row-main { grid-template-columns: 1fr; gap: 12px; }
  .card-row-actions { margin-top: 8px; }
  .two-columns { grid-template-columns: 1fr; gap: 0; }
  .wide-field { grid-column: auto; }
  .scene-pack-preview { grid-template-columns: 1fr; gap: 24px; }
  .theme-choice-preview { grid-template-columns: 112px minmax(0, 1fr); gap: 20px; }
  .link-panel { grid-template-columns: 1fr; }
  .form-actions { display: grid; }
  .photo-section-heading, .photo-upload-form, .share-preview-layout { grid-template-columns: 1fr; align-items: start; }
  .photo-upload-form .button { width: 100%; }
  .photo-preview-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 150px; }
  .photo-preview-grid figure:first-child { grid-column: 1 / -1; grid-row: auto; min-height: 220px; }
  .card-page .memory-gallery .memory-grid { grid-template-columns: minmax(0, 1fr); grid-auto-rows: auto; gap: 14px; }
  .card-page .memory-gallery .memory-grid figure,
  .card-page .memory-gallery .memory-grid figure:first-child {
    width: 100%;
    min-height: 0;
    grid-column: auto;
    grid-row: auto;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    transform: none;
  }
  .card-page .memory-gallery .memory-grid figure:first-child { aspect-ratio: 16 / 10; }
  .opening { margin-left: 0; }
  .scene-answer-list div { grid-template-columns: 1fr; gap: 8px; }
  .interaction-item { grid-template-columns: 42px minmax(0, 1fr); gap: 13px; }
  .interaction-action { width: 100%; }
  .sound-dock { width: calc(100% - 24px); right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); padding-left: 13px; gap: 9px; }
  .sound-actions { gap: 4px; }
  .sound-button { min-height: 42px; padding-inline: 9px; font-size: 11px; }
  .ending-text { margin-left: 0; }
  .login-layout { min-height: 100dvh; padding: 48px 18px; grid-template-columns: 1fr; align-content: center; gap: 48px; }
  .login-intro { align-self: auto; padding-bottom: 0; }
  .login-intro h1 { font-size: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .card-motion-ready [data-reveal] { opacity: 1 !important; transform: none !important; }
}