/* ============================================================
   AIBUAIBU Mobile Styles — Mobile-first Responsive v3
   2026-05-03 — Fix: chat-sidebar hidden on mobile
   
   Strategy: Mobile-first progressive enhancement.
   Default = mobile experience (no media query).
   min-width breakpoints add features as screen grows.
   ============================================================ */

/* ── Default: Mobile (<768px) ── */
:root { --container: calc(100vw - 32px); --nav-height: 56px; }

body { padding-bottom: 64px; overflow-x: hidden; width: 100%; max-width: 100%; }

/* Navigation */
.apple-nav, .site-shell__nav { padding: 0 16px; }
.search-container { display: none; }
.apple-sidebar { display: none; }
.chat-sidebar { display: none; }
.mobile-nav { display: flex; }

/* Typography */
h1 { font-size: 28px; }
h2 { font-size: 20px; }

/* Layout */
.site-shell { overflow-x: hidden; width: 100%; max-width: 100%; box-sizing: border-box; }
.layout { overflow-x: hidden; width: 100%; max-width: 100%; padding: 12px 16px; flex-direction: column; }
main { overflow-x: hidden; width: 100%; max-width: 100%; padding: 0 12px; box-sizing: border-box; }

/* Detail Page — Mobile (<=768px) */
@media (max-width: 768px) {
  .dt-page { flex-direction: column; padding: 12px 16px; gap: 16px; }
  .dt-sidebar { position: static; flex-basis: auto; max-height: none; }
  .dt-main { max-width: 100%; }
  .dt-title { font-size: 20px; }
  .dt-related-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .dt-actions { flex-direction: row; gap: 8px; }
  .dt-action-btn { padding: 10px 16px; font-size: 13px; min-height: 40px; }
  .dt-model-inner { flex-direction: column; }
  .dt-model-cover { width: 100%; height: auto; aspect-ratio: 16/9; }
  .dt-prompt-block { font-size: 12px; padding: 12px 16px; }
  .dt-gallery-item img,
  .dt-gallery-slide--portrait .dt-gallery-item img {
    width: auto !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: min(80vh, 900px) !important;
    object-fit: contain !important;
    object-position: center !important;
  }
  .dt-gallery-item { overflow: visible !important; }
}

/* Masonry Grid — 2 columns, 3:4 ratio images */
.masonry-grid {
  grid-template-columns: 1fr 1fr !important;
  width: 100% !important; max-width: 100% !important;
  overflow: visible !important; min-width: 0 !important;
  gap: 10px !important; padding: 0 !important; margin: 0 !important;
}
.masonry-grid .creation-card {
  width: 100% !important; max-width: 100% !important;
  min-width: 0 !important; overflow: hidden !important;
  box-sizing: border-box !important; border-radius: 12px !important;
}
.masonry-grid .creation-card .card-content { padding: 8px 10px !important; }
.masonry-grid .card-img-wrapper {
  display: block !important; width: 100% !important; min-width: 0 !important;
  max-width: 100% !important; height: 0 !important;
  padding-bottom: 133.33% !important; position: relative !important;
  overflow: hidden !important;
}
.masonry-grid .card-img-wrapper img:not(.author-avatar),
.masonry-grid .card-img-wrapper video {
  position: absolute !important; top: 0 !important; left: 0 !important;
  width: 100% !important; height: 100% !important;
  object-fit: cover !important; object-position: center !important;
  display: block !important;
}
.card-remix-btn { display: none !important; }
.creation-card:hover { transform: none; box-shadow: 0 1px 3px oklch(0 0 0 / 0.04); }
.card-hover-actions { display: none !important; }
.card-stats-overlay { opacity: 1 !important; }
.creation-card:hover .card-img-wrapper img,
.creation-card:hover .card-img-wrapper video { transform: none; filter: none; }
.card-img-wrapper::after { display: none !important; }
.card-content { padding: 10px 10px 12px; }
.card-content .card-title { font-size: 13px; }

/* Hero Cards */
.hero-card { padding: 20px; min-height: 200px; }
.hero-card.large { min-height: 240px; }
.hero-title { font-size: 20px; }
.hero-subtitle { font-size: 13px; }

/* Chat Page — Mobile (<=768px) */
@media (max-width: 768px) {
  .chat-form { max-width: 100%; margin: 0; }
  .chat-ref-bar .chat-ref-grid img { width: 52px; height: 52px; }
  .chat-messages { padding: 16px; gap: 12px; }
  .chat-input-bar { padding: 10px 12px 14px; }
  .chat-input-wrap { border-radius: 12px; padding: 3px 3px 3px 12px; border-width: 1.5px; }
  .chat-prompt { font-size: 14px; min-height: 22px; padding: 6px 0; max-height: 80px; }
  .chat-send-btn { padding: 7px 14px; border-radius: 10px; min-height: 36px; }
  .chat-options { gap: 4px; }
  .chat-model-btn { padding: 5px 10px; font-size: 11px; min-height: 30px; }
  .chat-select { padding: 5px 8px; font-size: 11px; min-height: 30px; }
  .chat-cost { font-size: 11px; padding: 2px 6px; }
  .chat-sidebar { display: none; }
  .chat-msg { max-width: 98% !important; }
  .chat-msg--ai.has-images { max-width: 100% !important; width: 100% !important; }
  .chat-img-grid { display: flex; flex-wrap: wrap; gap: 6px; overflow: hidden; }
  .chat-img-item { flex: 0 0 140px !important; }
  .chat-img-item img { width: 100% !important; height: 100% !important; max-width: 100% !important; max-height: 100% !important; }
  .chat-ref-upload { min-width: 34px; min-height: 34px; padding: 6px; }
  .chat-ref-grid img { width: 32px; height: 32px; }
  .chat-welcome { padding: 60px 16px 40px; }
  .chat-welcome h2 { font-size: 26px; }
  .model-picker-grid { grid-template-columns: 1fr; padding: 16px; }
  .model-picker-panel { border-radius: 16px; max-width: 100%; }
}

/* Auth Modal */
.auth-panel { padding: 20px 16px; }

/* Creation History Cards - Mobile */
.creation-actions-bar {
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 10px;
}
.creation-action {
  flex: 0 0 calc(50% - 3px);
  justify-content: center;
  padding: 8px 6px;
  font-size: 12px;
  min-height: 36px;
  white-space: nowrap;
}
.creation-action.download {
  flex: 0 0 100%;
  margin-top: 2px;
  gap: 6px;
  color: var(--brand);
  border-color: var(--brand-glow);
}
.creation-action svg {
  flex-shrink: 0;
}

/* Profile */
.profile-layout-wrapper { padding: 12px 16px; }
.profile-stats { grid-template-columns: 1fr 1fr; }
.profile-sidebar-wrapper { display: none; }

/* Profile — Mobile Compact */
.pc-user-card { padding: 16px; }
.pc-user-top { gap: 12px; }
.pc-avatar { width: 44px !important; height: 44px !important; font-size: 18px !important; }
.pc-user-name { font-size: 17px; }
.pc-points-row { padding: 10px 12px; gap: 4px; flex-wrap: nowrap; overflow-x: auto; }
.pc-points-item { flex-shrink: 0; white-space: nowrap; }
.pc-points-item strong { font-size: 14px; }
.pc-grid { gap: 8px; }
.pc-card { padding: 14px 6px; min-height: 70px; }
.pc-card-icon { font-size: 22px; }
.pc-card-label { font-size: 12px; }
.pc-panel { padding: 16px; }
.pf-row { grid-template-columns: 1fr; }
.dash-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
.dash-card { padding: 12px; flex-direction: column; }
.month-stats { grid-template-columns: 1fr; }

/* Points Log */
.points-log-layout { padding: 16px; }
.points-log-sidebar { display: none; }
.points-stats-cards { grid-template-columns: 1fr; }

/* Footer */
.footer-main { padding: 32px 16px 24px; }
.footer-main-inner { grid-template-columns: 1fr; gap: 24px; }
.footer-bottom-inner { flex-direction: column; text-align: center; }
.feed-toolbar { flex-direction: column; align-items: flex-start; gap: 10px; }

/* Images */
img, video { max-width: 100% !important; height: auto; }
.masonry-grid img:not(.author-avatar):not(.avatar-fallback) {
  display: block !important; width: 100% !important;
  height: 100% !important; object-fit: cover !important;
}
.masonry-grid .author-avatar,
.masonry-grid .avatar-fallback {
  width: 22px !important; height: 22px !important;
  flex-shrink: 0 !important;
}

/* Tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Help page mobile */
.help-shortcuts { grid-template-columns: repeat(2, 1fr); }
.guide-steps { grid-template-columns: 1fr; }
.contact-grid { grid-template-columns: 1fr; }
.help-page h1 { font-size: 24px; }

/* Referral mobile */
.referral-page { padding: 16px 12px 100px; }
.earnings-stats { grid-template-columns: 1fr; }
.link-stats { grid-template-columns: repeat(2, 1fr); }
.share-btns { flex-direction: column; }

/* API docs mobile */
.api-sidebar { transform: translateX(-100%); transition: transform 0.3s ease; }
.api-sidebar.open { transform: translateX(0); }
.api-content { margin-left: 0; padding: 24px; }
.api-menu-toggle { display: block; position: fixed; bottom: 24px; right: 24px; width: 56px; height: 56px; background: #ff9f0a; border: none; border-radius: 50%; color: #fff; font-size: 24px; cursor: pointer; box-shadow: 0 4px 12px rgba(255,159,10,0.4); z-index: 200; }

/* Invite mobile */
.invite-page { padding: 16px; }
.invite-card { padding: 28px 20px; }
.invite-title { font-size: 24px; }

/* About mobile */
.about-page { padding: 32px 20px 48px; }
.about-hero h1 { font-size: 28px; }
.about-hero .about-tagline { font-size: 16px; }
.about-hero .about-desc { font-size: 14px; }
.about-section { margin-top: 40px; }
.about-section-title { font-size: 20px; }
.capability-grid { grid-template-columns: 1fr; gap: 14px; }
.capability-item { display: flex; align-items: center; gap: 16px; padding: 18px 20px; }
.capability-icon { margin-bottom: 0; flex-shrink: 0; }
.capability-item h3 { font-size: 16px; margin-bottom: 4px; }
.advantage-grid { grid-template-columns: 1fr; gap: 14px; }
.advantage-item { padding: 20px 18px; }
.advantage-item p { padding-right: 0; margin-top: 8px; }
.advantage-tag { position: static; display: inline-block; margin-top: 10px; }
.comparison-table th, .comparison-table td { padding: 10px 14px; font-size: 13px; }
.scenario-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
.scenario-item { padding: 18px 14px; }
.cta-card { padding: 32px 20px; }
.cta-card h2 { font-size: 22px; }
.cta-card p { font-size: 14px; }
.cta-actions { flex-direction: column; }
.cta-btn { justify-content: center; width: 100%; }

/* Carousel (activity page) */
.hero-carousel { display: block; overflow: hidden; margin-bottom: 16px; position: relative; border-radius: var(--radius-lg); }
.carousel-track { display: flex; transition: transform 0.4s ease; }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-card { padding: 32px 24px; min-height: 200px; background: linear-gradient(135deg,#ff9f0a,#ffd75e); border-radius: var(--radius-lg); display: flex; flex-direction: column; justify-content: center; }
.carousel-tag { display: inline-block; padding: 4px 10px; border-radius: var(--radius-full); background: rgba(255,255,255,0.2); color: #fff; font-size: 11px; font-weight: 600; margin-bottom: 8px; align-self: flex-start; }
.carousel-title { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.carousel-desc { font-size: 13px; color: rgba(255,255,255,0.8); margin-bottom: 16px; }
.carousel-btn { display: inline-flex; padding: 8px 20px; background: rgba(255,255,255,0.95); color: #1d1a16; border-radius: var(--radius-full); font-size: 13px; font-weight: 600; text-decoration: none; align-self: flex-start; }
.carousel-dots { display: flex; justify-content: center; gap: 8px; margin-top: 12px; }
.carousel-dots .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); cursor: pointer; transition: all 0.2s; }
.carousel-dots .dot.active { width: 24px; border-radius: 4px; background: var(--brand); }
.hero-section { display: none; }

/* ── Tablet (≥768px) ── */
@media (min-width: 768px) {
  :root { --nav-height: 64px; }
  body { padding-bottom: 0; }
  .apple-sidebar { display: block; }
  .mobile-nav { display: none; }
  .search-container { display: block; }
  .apple-nav, .site-shell__nav { padding: 0 24px; }
  .layout { flex-direction: row; padding: 24px 32px; }
  main { padding: 0; }
  .masonry-grid { grid-template-columns: repeat(4, 1fr) !important; gap: 12px !important; }
  .profile-sidebar-wrapper { display: block; }
  .points-log-sidebar { display: block; }
  .points-stats-cards { grid-template-columns: repeat(3, 1fr); }
  .profile-layout-wrapper { padding: 24px 32px; }
  .points-log-layout { padding: 24px 32px; }
  .hero-section { display: block; }
  .hero-carousel { display: none; }
  .help-shortcuts { grid-template-columns: repeat(4, 1fr); }
  .guide-steps { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: repeat(3, 1fr); }
  .about-page { padding: 48px 32px 64px; }
  .capability-grid { grid-template-columns: repeat(3, 1fr); }
  .about-scenario-grid { grid-template-columns: repeat(4, 1fr); }
  .api-menu-toggle { display: none; }
  .api-sidebar { transform: none; }
  .api-content { margin-left: 260px; padding: 24px 48px 40px; }
  .chat-sidebar { display: block; }
  .chat-form { max-width: 75%; margin: 0 auto; }
  .chat-input-bar { padding: 10px 24px 14px; }
  .chat-input-wrap { border-radius: 12px; padding: 6px 6px 6px 16px; border-width: 1.5px; min-height: 70px; }
  .chat-prompt { font-size: 15px; min-height: 48px; padding: 10px 0; max-height: 160px; }
  .chat-send-btn { padding: 8px 20px; border-radius: 10px; min-height: 48px; }
  .chat-options { gap: 8px; }
  .chat-model-btn { padding: 8px 16px; font-size: 13px; min-height: 38px; }
  .chat-select { padding: 8px 14px; font-size: 13px; min-height: 38px; }
  .chat-cost { font-size: 13px; padding: 4px 10px; }
  .chat-msg { max-width: 75% !important; }
  .chat-msg--ai.has-images { max-width: 80% !important; width: auto !important; }
  .chat-img-grid { display: flex; flex-wrap: wrap; gap: 8px; overflow: hidden; }
  .chat-img-item { flex: 0 0 170px; }
  .chat-ref-upload { min-width: 38px; min-height: 38px; padding: 8px; }
  .chat-ref-grid img { width: 36px; height: 36px; }
  .chat-welcome { padding: 80px 24px 60px; }
  .chat-welcome h2 { font-size: 32px; }
  .model-picker-grid { grid-template-columns: repeat(3, 1fr); padding: 24px; }
  .model-picker-panel { border-radius: 20px; max-width: 600px; }
  .earnings-stats { grid-template-columns: repeat(3, 1fr); }
  .link-stats { grid-template-columns: repeat(4, 1fr); }
  .share-btns { flex-direction: row; }
}

/* ── Desktop (≥1100px) ── */
@media (min-width: 1100px) {
  .masonry-grid { grid-template-columns: repeat(7, 1fr) !important; }
  .footer-main-inner { grid-template-columns: 1.8fr 1fr 1fr 1fr; }
}

/* create-page layout overrides (must come after style.css) */
.create-page .apple-sidebar { display: block; }
.create-page .layout { flex-direction: row; padding: 0; }
.create-page .main-content {
  display: flex;
  flex-direction: row !important;
  flex: 1;
  height: 0;
  min-height: 0;
  overflow: hidden;
}
.create-page .chat-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}
.create-page .result-panel {
  width: 380px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  background: var(--bg-subtle);
  overflow: hidden;
}