/* Shared paper-and-garden atmosphere for the main app pages. */
body[data-page="chat"] .app-shell { --page-mark: url('../icons/nav/chat-cutout-v2.webp'); --page-companion: url('../assets/fox-cottage-cutout-v2.webp'); --page-stamp: #965326; }
body[data-page="memories"] .app-shell { --page-mark: url('../icons/nav/memories-cutout-v2.webp'); --page-companion: url('../icons/nav/library-v2.webp'); --page-stamp: #66704b; }
body[data-page="diary"] .app-shell { --page-mark: url('../icons/nav/diary-cutout-v2.webp'); --page-companion: url('../icons/nav/mailbox-cutout-v2.webp'); --page-stamp: #667d82; }
body[data-page="dream"] .app-shell { --page-mark: url('../icons/nav/dream-cutout-v2.webp'); --page-companion: url('../icons/nav/rhythm-v2.webp'); --page-stamp: #7d4038; }
body[data-page="mailbox"] .app-shell { --page-mark: url('../icons/nav/mailbox-cutout-v2.webp'); --page-companion: url('../icons/nav/diary-cutout-v2.webp'); --page-stamp: #965326; }
body[data-page="moments"] .app-shell { --page-mark: url('../icons/nav/moments-cutout-v2.webp'); --page-companion: url('../icons/nav/calendar-v2.webp'); --page-stamp: #66704b; }
body[data-page="heart"] .app-shell { --page-mark: url('../icons/nav/heart-cutout-v2.webp'); --page-companion: url('../icons/nav/rhythm-v2.webp'); --page-stamp: #7d4038; }
body[data-page="settings"] .app-shell { --page-mark: url('../icons/nav/settings-cutout-v2.webp'); --page-companion: url('../assets/fox-cottage-cutout-v2.webp'); --page-stamp: #965326; }
body[data-page="calendar"] .app-shell { --page-mark: url('../icons/nav/calendar-v2.webp'); --page-companion: url('../icons/nav/diary-cutout-v2.webp'); --page-stamp: #965326; }
body[data-page="bookshelf"] .app-shell { --page-mark: url('../icons/nav/library-v2.webp'); --page-companion: url('../icons/nav/memories-cutout-v2.webp'); --page-stamp: #667d82; }
body[data-page="cove"] .app-shell { --page-mark: url('../icons/nav/cove-v2.webp'); --page-companion: url('../icons/nav/dream-cutout-v2.webp'); --page-stamp: #667d82; }
body[data-page="rhythm"] .app-shell { --page-mark: url('../icons/nav/rhythm-v2.webp'); --page-companion: url('../icons/nav/heart-cutout-v2.webp'); --page-stamp: #7d4038; }
body[data-page="cycle"] .app-shell { --page-mark: url('../icons/nav/cycle-cutout-v2.webp'); --page-companion: url('../icons/nav/calendar-v2.webp'); --page-stamp: #89584f; }
html body .app-shell {
  position: relative;
  isolation: isolate;
  background-color: var(--surface-1);
  background-image:
    radial-gradient(ellipse 70% 460px at 50% 0%, rgba(255,253,247,.9), transparent 100%),
    radial-gradient(ellipse 38% 45% at 0% 75%, rgba(190,153,95,.1), transparent 100%),
    linear-gradient(135deg, #f5ecd9, #ede0c8 75%, #e9d7b8);
}
html body .app-shell::before,
html body .app-shell::after {
  content: '';
  position: fixed;
  z-index: 0;
  pointer-events: none;
  width: clamp(180px, 23vw, 360px);
  height: clamp(180px, 23vw, 360px);
  background: var(--page-mark) center / contain no-repeat;
  opacity: .1;
  filter: sepia(.12);
}
html body .app-shell::before { top: 11%; left: -7%; transform: rotate(-19deg); }
html body .app-shell::after {
  right: -8%;
  bottom: 7%;
  background-image: var(--page-companion);
  transform: rotate(17deg);
}
html body .app-shell > :is(.header, .main, .main-content, .footer) { position: relative; z-index: 1; }
html body .app-shell > .header { position: sticky; }
html body .app-shell .page-container { position: relative; }
html body .app-shell .page-header {
  padding: 0 0 20px;
  margin-bottom: clamp(24px, 4vw, 38px);
  border-bottom: 1px solid var(--border-default);
}
html body .app-shell .page-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(2rem, 1.58rem + 1.6vw, 3rem);
  letter-spacing: .015em;
}
html body .app-shell .page-title img { width: 48px; height: 48px; flex: none; object-fit: contain; }
html body .app-shell .page-intro {
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: 1.75;
}
html body .app-shell :is(.diary-card, .dream-card, .memory-card, .moment-item, .mail-card, .heart-card, .cycle-card) {
  border: 1px solid var(--border-default);
  box-shadow: 0 12px 35px rgba(70,52,32,.075), inset 0 0 0 4px rgba(255,253,247,.4);
}
html body .app-shell :is(.diary-card, .dream-card, .memory-card, .moment-item, .mail-card, .heart-card, .vital-card, .chord-card, .cycle-card, .cove-card, .rhythm-entry, .settings-card, .clock-card, .command-card) {
  background-image: linear-gradient(rgba(255,253,247,.83), rgba(255,253,247,.83)), var(--page-mark);
  background-repeat: no-repeat;
  background-position: center, right 14px bottom 10px;
  background-size: auto, 64px 64px;
  border-color: var(--border-default);
}
html body .app-shell :is(.cove-card, .rhythm-entry, .settings-card, .clock-card, .vital-card, .chord-card) {
  box-shadow: 0 12px 35px rgba(70,52,32,.075), inset 0 0 0 4px rgba(255,253,247,.32);
}
html body .app-shell :is(.diary-card, .dream-card, .mail-card, .heart-card, .cycle-card, .cove-card, .rhythm-entry, .settings-card, .clock-card, .vital-card, .chord-card) { position: relative; }
html body .app-shell .settings-card-header {
  background-image: linear-gradient(rgba(243,232,208,.82),rgba(243,232,208,.82)), var(--page-mark);
  background-repeat: no-repeat;
  background-position: center, right 36px center;
  background-size: auto, 42px 42px;
}
html body .app-shell .bookshelf-wrap {
  background-image: radial-gradient(ellipse at 50% 0%, rgba(255,253,247,.4), transparent 70%), var(--page-mark);
  background-repeat: no-repeat;
  background-position: center, right 26px bottom 20px;
  background-size: auto, 105px 105px;
}
html body .app-shell .main-content { padding-block: clamp(26px, 4vw, 56px); }
html body .app-shell .chat-area {
  background-color: var(--surface-1);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(255,253,247,.55), transparent),
    linear-gradient(rgba(243,232,208,.82),rgba(243,232,208,.82)),
    var(--page-mark);
  background-size: auto, auto, 170px 170px;
  background-position: center, center, right 26px bottom 95px;
  background-repeat: no-repeat;
}
html body .app-shell .chat-header,
html body .app-shell .sidebar-header { background: color-mix(in srgb, var(--surface-2) 78%, #e7d4ad); border-bottom-color: var(--border-default); }
html body .app-shell .message-bubble.assistant { box-shadow: 0 5px 16px rgba(70,52,32,.06); border-color: var(--border-default); }
html body .app-shell .message-bubble.user { background: var(--color-terracotta-dark); color: #fffdf7; box-shadow: 0 5px 16px rgba(105,61,33,.12); }

[data-theme="dark"] body .app-shell {
  background-color: var(--surface-1);
  background-image:
    radial-gradient(ellipse 70% 500px at 50% 0%, rgba(141,95,52,.25), transparent 100%),
    radial-gradient(ellipse 40% 50% at 0% 80%, rgba(141,95,52,.1), transparent 100%),
    linear-gradient(145deg, #302920, #24211e 70%);
}
[data-theme="dark"] body .app-shell::before,
[data-theme="dark"] body .app-shell::after { opacity: .09; filter: sepia(.8) brightness(1.3); }
[data-theme="dark"] body .app-shell :is(.diary-card, .dream-card, .memory-card, .moment-item, .mail-card, .heart-card, .cycle-card) {
  box-shadow: 0 15px 32px rgba(0,0,0,.2), inset 0 0 0 4px rgba(255,247,224,.025);
}
[data-theme="dark"] body .app-shell :is(.cove-card, .rhythm-entry, .settings-card, .clock-card, .vital-card, .chord-card) {
  box-shadow: 0 15px 32px rgba(0,0,0,.2), inset 0 0 0 4px rgba(255,247,224,.025);
}
[data-theme="dark"] body .app-shell :is(.diary-card, .dream-card, .memory-card, .moment-item, .mail-card, .heart-card, .vital-card, .chord-card, .cycle-card, .cove-card, .rhythm-entry, .settings-card, .clock-card, .command-card) {
  background-image: linear-gradient(rgba(61,54,45,.86),rgba(61,54,45,.86)), var(--page-mark);
}
[data-theme="dark"] body .app-shell .bookshelf-wrap {
  background-image: linear-gradient(rgba(41,37,31,.8),rgba(41,37,31,.8)), var(--page-mark);
}
[data-theme="dark"] body .app-shell .settings-card-header {
  background-image: linear-gradient(rgba(52,47,39,.84),rgba(52,47,39,.84)), var(--page-mark);
}
[data-theme="dark"] body .app-shell .chat-area {
  background-color: var(--surface-1);
  background-image: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(169,116,63,.12), transparent), linear-gradient(rgba(41,37,31,.86),rgba(41,37,31,.86)), var(--page-mark);
}
[data-theme="dark"] body .app-shell .chat-header,
[data-theme="dark"] body .app-shell .sidebar-header { background: #3a3229; }
[data-theme="dark"] body .app-shell .message-bubble.user { background: var(--color-primary); color: var(--text-inverse); }

@media (max-width: 767px) {
  html body .app-shell::before,
  html body .app-shell::after { width: 150px; height: 150px; opacity: .12; }
  html body .app-shell::before { left: -68px; }
  html body .app-shell::after { right: -68px; }
  html body .app-shell .main-content { padding-block: 28px 46px; }
}