/* Ambobs UI refinement layer. Seasonal theme is supplied by /api/season. */
:root {
  --ui-focus: #a94f6c;
  --ui-surface: rgba(255, 254, 250, 0.96);
  --ui-surface-soft: rgba(255, 254, 250, 0.78);
  --ui-shadow: 0 14px 34px rgba(32, 37, 34, 0.08);
  --ui-shadow-hover: 0 18px 44px rgba(32, 37, 34, 0.12);
  --ui-radius: 12px;
  --season-accent: #a94f6c;
  --season-background: #fffdfa;
  --season-text: #171a18;
  --season-surface: #fffefa;
  --season-border: #deddd6;
  color-scheme: light;
}

html { scroll-behavior: smooth; }
body { text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible,
#root:focus-visible { outline: 2px solid var(--season-accent); outline-offset: 3px; }

.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 100; transform: translateY(-160%);
  padding: 9px 13px; border: 1px solid var(--season-border); border-radius: 9px;
  background: var(--season-surface); color: var(--season-text); box-shadow: var(--ui-shadow);
  font-size: 13px; font-weight: 700; text-decoration: none; transition: transform .16s ease;
}
.skip-link:focus-visible { transform: translateY(0); }

.topbar { box-shadow: 0 1px 0 rgba(32,37,34,.025), 0 8px 24px rgba(32,37,34,.035); }
.brand { transition: transform .18s ease, opacity .18s ease; }
.brand:hover { transform: translateY(-1px); opacity: .92; }
.brand-mark { box-shadow: 0 5px 14px color-mix(in srgb, var(--season-accent) 18%, transparent); }
.nav-item { min-height: 44px; transition: background-color .16s ease, color .16s ease, transform .16s ease, box-shadow .16s ease; }
.nav-item:hover { transform: translateX(2px); }
.nav-active { box-shadow: inset 3px 0 0 var(--season-accent); }

.post-card, .composer { box-shadow: 0 1px 0 rgba(32,37,34,.025); transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.post-card:hover { border-color: var(--season-border); box-shadow: var(--ui-shadow-hover); transform: translateY(-1px); }
.post-card p, .post-card .post-text, .markdown-body { overflow-wrap: anywhere; text-wrap: pretty; }
.post-text { line-height: 1.72; }

.composer { position: relative; overflow: visible; border-radius: var(--ui-radius); background: var(--ui-surface-soft); }
.composer:focus-within { border-color: var(--season-border); box-shadow: 0 0 0 3px color-mix(in srgb, var(--season-accent) 8%, transparent), var(--ui-shadow); }
.composer textarea { min-height: 84px; line-height: 1.65; }
.composer-editor { position: relative; }
.composer-markup { line-height: 1.65; }
.composer-footer { gap: 12px; }
.composer-inline-tools { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 2px; }
.composer-inline-tools > button, .composer-format-button { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 7px; color: #737a73; background: transparent; transition: background-color .15s ease, color .15s ease, transform .15s ease; }
.composer-inline-tools > button:hover, .composer-format-button:hover { color: var(--season-text); background: color-mix(in srgb, var(--season-accent) 12%, var(--season-surface)); transform: translateY(-1px); }
.composer-actions { gap: 7px; }
.primary-button, .save-button { transition: transform .16s ease, box-shadow .16s ease, filter .16s ease; }
.primary-button:hover:not(:disabled), .save-button:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 7px 16px rgba(32,37,34,.11); }

.search-panel { border-radius: 10px; transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease; }
.search-panel:focus-within { border-color: var(--season-border); box-shadow: 0 0 0 3px color-mix(in srgb, var(--season-accent) 8%, transparent), 0 8px 22px rgba(32,37,34,.05); }
.feed-search { min-height: 48px; }

.user-profile, .settings-panel, .admin-panel, .hashtag-profile { border-radius: var(--ui-radius); }
.profile-follow, .profile-edit, .follow-button, .small-button { transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease; }
.profile-follow:hover, .profile-edit:hover, .follow-button:hover, .small-button:hover { transform: translateY(-1px); }
.profile-stats { border-radius: 9px; }
.profile-tag-list button, .profile-user-list button { transition: background-color .15s ease, color .15s ease, transform .15s ease; }
.profile-tag-list button:hover, .profile-user-list button:hover { transform: translateX(2px); }

.empty-state, .loading-state, .error-state { border: 1px dashed var(--season-border); border-radius: var(--ui-radius); background: color-mix(in srgb, var(--season-surface) 82%, transparent); padding: 42px 24px; text-align: center; }
.empty-state svg, .loading-state svg, .error-state svg { margin-bottom: 8px; }
.empty-state p, .loading-state p, .error-state p { margin: 0 0 5px; }

.icon-button, .feed-filter, .tag-link, .hashtag-item, .help-link, .ai-toggle-button, .ai-cancel-button, .get-started-chip, .share-post-button, .notification-item, .account-popover button { transition: background-color .16s ease, color .16s ease, border-color .16s ease, transform .16s ease; }
.icon-button:active, .feed-filter:active, .primary-button:active, .save-button:active, .get-started-chip:active { transform: scale(.97); }
.notification-panel, .account-popover, .hashtag-popover, .composer-format-menu { border-radius: 10px; box-shadow: 0 18px 46px rgba(32,37,34,.12); }

@media (max-width: 1080px) {
  .layout { grid-template-columns: 170px minmax(0, 1fr); gap: 30px; padding-left: 24px; padding-right: 24px; }
  .right-rail { display: none; }
  .site-footer { padding-left: 24px; padding-right: 24px; }
}

@media (max-width: 760px) {
  .topbar { height: 62px; }
  .topbar-inner { padding: 0 16px; }
  .top-actions { right: 16px; gap: 7px; }
  .layout { display: block; padding: 24px 16px 96px; }
  .left-rail { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; min-height: 0; margin: 0; padding: 7px max(10px, env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left)); background: color-mix(in srgb, var(--season-surface) 94%, transparent); border-top: 1px solid var(--season-border); box-shadow: 0 -10px 28px rgba(32,37,34,.08); backdrop-filter: blur(16px); }
  .main-nav { display: flex; justify-content: space-around; gap: 4px; overflow-x: auto; scrollbar-width: none; }
  .main-nav::-webkit-scrollbar { display: none; }
  .nav-item { flex: 0 0 auto; min-width: 64px; height: 42px; padding: 0 10px; justify-content: center; gap: 7px; font-size: 11px; }
  .nav-active { box-shadow: inset 0 -2px 0 var(--season-accent); }
  .rail-bottom { display: none; }
  .feed-heading { margin-bottom: 18px; align-items: center; }
  .feed-heading h1 { font-size: clamp(28px, 8vw, 34px); }
  .feed-filter { padding: 7px 0; }
  .composer { padding: 15px; gap: 10px; }
  .composer textarea { min-height: 88px; }
  .composer-footer { align-items: flex-end; flex-wrap: wrap; }
  .composer-inline-tools { order: 1; width: 100%; }
  .composer-actions { order: 2; width: 100%; flex-wrap: wrap; justify-content: flex-end; }
  .composer-actions .ai-toggle-button { margin-right: auto; }
  .site-footer { padding: 0 16px 22px; flex-wrap: wrap; gap: 9px 14px; }
  .site-footer .online { margin-right: auto; }
}

@media (max-width: 520px) {
  .brand { font-size: 17px; }
  .brand-mark { width: 29px; height: 29px; }
  .top-actions { position: static; margin-left: auto; }
  .profile-chip span { display: none; }
  .notification-panel, .account-popover { position: fixed; top: 68px; right: 12px; width: min(330px, calc(100vw - 24px)); }
  .feed-heading { gap: 12px; }
  .feed-heading > div:first-child { min-width: 0; }
  .feed-filter { white-space: nowrap; }
  .search-panel { padding: 11px 12px; }
  .composer-footer { gap: 10px; }
  .ai-compose-panel { flex-wrap: wrap; }
  .ai-compose-panel input { flex-basis: 100%; }
  .ai-compose-panel select { flex: 1; }
  .ai-generate-button { flex: 1; justify-content: center; }
  .empty-state, .loading-state, .error-state { padding: 32px 18px; }
}

/* Seasonal themes are controlled by the backend instead of OS dark mode. */
html[data-season="spring"] {
  --ui-focus: #ff69b4;
  --season-accent: #ff69b4;
  --season-background: #000000;
  --season-text: #ffffff;
  --season-surface: #111111;
  --season-border: #2b2b2b;
  color-scheme: dark;
}

html[data-season="summer"] {
  --ui-focus: #b08b00;
  --season-accent: #f2c94c;
  --season-background: #ffffff;
  --season-text: #111111;
  --season-surface: #fffdf2;
  --season-border: #e5dfc8;
  color-scheme: light;
}

html[data-season="autumn"] {
  --ui-focus: #2e8b57;
  --season-accent: #2e8b57;
  --season-background: #ffffff;
  --season-text: #111111;
  --season-surface: #fffefa;
  --season-border: #deddd6;
  color-scheme: light;
}

html[data-season="winter"] {
  --ui-focus: #ffffff;
  --season-accent: #ffffff;
  --season-background: #000000;
  --season-text: #ffffff;
  --season-surface: #111111;
  --season-border: #ffffff;
  color-scheme: dark;
}

html[data-season="spring"] body,
html[data-season="autumn"] body,
html[data-season="winter"] body { background: var(--season-background); color: var(--season-text); }

html[data-season="summer"] body { background: var(--season-background); color: var(--season-text); }

html[data-season="spring"] .app-shell,
html[data-season="autumn"] .app-shell,
html[data-season="winter"] .app-shell { background: var(--season-background); color: var(--season-text); }
html[data-season="summer"] .app-shell { background: var(--season-background); color: var(--season-text); }

html[data-season="spring"] .topbar,
html[data-season="spring"] .left-rail,
html[data-season="winter"] .topbar,
html[data-season="winter"] .left-rail { background: rgba(0,0,0,.96); color: #F8F8FF; border-color: var(--season-border); }

html[data-season="autumn"] .topbar,
html[data-season="autumn"] .left-rail { background: rgba(255,255,255,.96); color: #111111; border-color: var(--season-border); }

html[data-season="spring"] .post-card,
html[data-season="spring"] .composer,
html[data-season="spring"] .user-profile,
html[data-season="spring"] .settings-panel,
html[data-season="spring"] .admin-panel,
html[data-season="spring"] .hashtag-profile,
html[data-season="spring"] .empty-state,
html[data-season="spring"] .loading-state,
html[data-season="spring"] .error-state,
html[data-season="autumn"] .post-card,
html[data-season="autumn"] .composer,
html[data-season="autumn"] .user-profile,
html[data-season="autumn"] .settings-panel,
html[data-season="autumn"] .admin-panel,
html[data-season="autumn"] .hashtag-profile,
html[data-season="autumn"] .empty-state,
html[data-season="autumn"] .loading-state,
html[data-season="autumn"] .error-state { background: var(--season-surface); color: var(--season-text); border-color: var(--season-border); }

html[data-season="winter"] .post-card,
html[data-season="winter"] .composer,
html[data-season="winter"] .user-profile,
html[data-season="winter"] .settings-panel,
html[data-season="winter"] .admin-panel,
html[data-season="winter"] .hashtag-profile,
html[data-season="winter"] .empty-state,
html[data-season="winter"] .loading-state,
html[data-season="winter"] .error-state { background: var(--season-surface); color: #F8F8FF; border-color: var(--season-border); }

html[data-season="summer"] .post-card,
html[data-season="summer"] .composer,
html[data-season="summer"] .user-profile,
html[data-season="summer"] .settings-panel,
html[data-season="summer"] .admin-panel,
html[data-season="summer"] .hashtag-profile,
html[data-season="summer"] .empty-state,
html[data-season="summer"] .loading-state,
html[data-season="summer"] .error-state { background: var(--season-surface); color: #111; border-color: var(--season-border); }

html[data-season="spring"] .notification-panel,
html[data-season="spring"] .account-popover,
html[data-season="spring"] .hashtag-popover,
html[data-season="spring"] .composer-format-menu,
html[data-season="spring"] .modal-card,
html[data-season="autumn"] .notification-panel,
html[data-season="autumn"] .account-popover,
html[data-season="autumn"] .hashtag-popover,
html[data-season="autumn"] .composer-format-menu,
html[data-season="autumn"] .modal-card { background: #ffffff; color: #111111; border-color: var(--season-border); }

html[data-season="winter"] .notification-panel,
html[data-season="winter"] .account-popover,
html[data-season="winter"] .hashtag-popover,
html[data-season="winter"] .composer-format-menu,
html[data-season="winter"] .modal-card { background: #111; color: #F8F8FF; border-color: var(--season-border); }

html[data-season="summer"] .notification-panel,
html[data-season="summer"] .account-popover,
html[data-season="summer"] .hashtag-popover,
html[data-season="summer"] .composer-format-menu,
html[data-season="summer"] .modal-card { background: #fff; color: #111; border-color: var(--season-border); }

html[data-season="spring"] .nav-item:hover,
html[data-season="spring"] .nav-active,
html[data-season="spring"] .icon-button:hover,
html[data-season="spring"] .account-popover button:hover,
html[data-season="autumn"] .nav-item:hover,
html[data-season="autumn"] .nav-active,
html[data-season="autumn"] .icon-button:hover,
html[data-season="autumn"] .account-popover button:hover,
html[data-season="winter"] .nav-item:hover,
html[data-season="winter"] .nav-active,
html[data-season="winter"] .icon-button:hover,
html[data-season="winter"] .account-popover button:hover { background: color-mix(in srgb, var(--season-accent) 18%, #111); color: #F8F8FF; }

html[data-season="summer"] .nav-item:hover,
html[data-season="summer"] .nav-active,
html[data-season="summer"] .icon-button:hover,
html[data-season="summer"] .account-popover button:hover { background: color-mix(in srgb, var(--season-accent) 20%, #fff); color: #111; }

html[data-season="spring"] .site-footer,
html[data-season="autumn"] .site-footer,
html[data-season="winter"] .site-footer { color: #bcbcbc; }
html[data-season="summer"] .site-footer { color: #555; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}