/* ==========================================================================
   Sasonis AI — UI/UX polish layer
   Caricato DOPO style.css: unifica design language, ridisegna i modal,
   migliora chat/composer e definisce layout dedicati per mobile e tablet.

   Breakpoint (mobile-first nel ragionamento, desktop-first nel codice):
     <= 380   mobile small
     <= 768   mobile      (drawer + composer a due righe)
     769-1024 tablet      (sidebar persistente stretta + topbar compatta)
     1025-1599 laptop/desktop
     >= 1600  large desktop
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  --r-control: 12px;   /* input, bottoni, chip */
  --r-card: 16px;      /* card, frame immagini, menu */
  --r-modal: 24px;     /* modal e sheet */

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;

  --touch: 44px;       /* dimensione minima target touch */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --fs-xs: 0.75rem;
  --fs-sm: 0.85rem;
  --fs-base: 0.95rem;
  --fs-lg: 1.15rem;
  --fs-xl: 1.5rem;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-hover: rgba(255, 255, 255, 0.1);
  --focus-ring: 0 0 0 2px var(--bg-app), 0 0 0 4px var(--brand-secondary);
  --warn-bg: rgba(245, 158, 11, 0.1);
  --warn-border: rgba(245, 158, 11, 0.32);
  --warn-text: #fbbf24;
  --danger: #ff5c5c;
}

[data-theme="light"] {
  --glass-bg: rgba(0, 0, 0, 0.04);
  --glass-bg-hover: rgba(0, 0, 0, 0.07);
  --warn-text: #b45309;
}

[hidden] { display: none !important; }

.app-layout { height: 100vh; height: 100dvh; width: 100%; }
body.modal-open { overflow: hidden; }

/* Focus visibile e coerente (navigazione da tastiera) */
:where(button, a, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.input-wrapper textarea:focus-visible,
.search-box input:focus-visible { box-shadow: none; }

/* Scrollbar sottili */
* { scrollbar-width: thin; scrollbar-color: rgba(128, 128, 128, 0.35) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: rgba(128, 128, 128, 0.32); border-radius: 8px; border: 2px solid transparent; background-clip: content-box; }
*::-webkit-scrollbar-thumb:hover { background: rgba(128, 128, 128, 0.5); background-clip: content-box; border: 2px solid transparent; }

/* --------------------------------------------------------------------------
   2. Sistema bottoni unificato
      primary = gradient accent | secondary = glass | ghost | danger
   -------------------------------------------------------------------------- */
.studio-btn,
.studio-primary-btn,
.primary-auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: var(--touch);
  padding: 0 var(--sp-4);
  border: 1px solid transparent;
  border-radius: var(--r-control);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}

.studio-btn:active:not(:disabled),
.studio-primary-btn:active:not(:disabled),
.primary-auth-btn:active:not(:disabled),
.send-btn:active:not(:disabled) { transform: scale(0.97); }

.studio-btn:disabled,
.studio-primary-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.studio-btn-primary,
.studio-primary-btn,
.primary-auth-btn {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 2px 10px var(--brand-glow);
}

.studio-btn-secondary {
  background: var(--glass-bg);
  border-color: var(--border-color);
  color: var(--text-main);
}

.studio-btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.studio-btn-danger {
  background: rgba(255, 92, 92, 0.12);
  border-color: rgba(255, 92, 92, 0.3);
  color: var(--danger);
}

@media (hover: hover) {
  .studio-btn-primary:hover:not(:disabled),
  .studio-primary-btn:hover:not(:disabled),
  .primary-auth-btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 18px var(--brand-glow); opacity: 1; }
  .studio-btn-secondary:hover:not(:disabled) { background: var(--glass-bg-hover); border-color: var(--border-color-hover); }
  .studio-btn-ghost:hover:not(:disabled) { background: var(--glass-bg); color: var(--text-main); }
}

/* Spinner nei bottoni */
.btn-spinner { display: none; width: 16px; height: 16px; border-radius: 50%; border: 2px solid rgba(255, 255, 255, 0.4); border-top-color: #fff; animation: spin 0.7s linear infinite; }
.is-loading .btn-spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Raggio e tipografia coerenti sugli altri controlli */
.new-chat-btn, .nanobanana-studio-btn, .auth-pill-btn, .footer-btn, .icon-utility-btn, .icon-btn { border-radius: var(--r-control); }
.suggestion-card, .guest-welcome-banner, .attachment-preview-bar, .code-block-container, .reasoning-accordion { border-radius: var(--r-card); }
.search-box, .form-group input, .studio-textarea, .auth-alert { border-radius: var(--r-control); }
.auth-modal-card, .auth-card-standalone { border-radius: var(--r-modal); }

.auth-pill-btn { min-height: 40px; }
.auth-pill-btn.register-btn { box-shadow: 0 2px 10px var(--brand-glow); }
.form-group input { min-height: var(--touch); }
.auth-modal-close { width: 40px; height: 40px; top: 12px; right: 12px; display: grid; place-items: center; border-radius: 50%; transition: background-color 0.15s; }
.auth-modal-close:hover { background: var(--glass-bg); }

/* --------------------------------------------------------------------------
   3. Sidebar
   -------------------------------------------------------------------------- */
.sidebar-header { padding: var(--sp-4) var(--sp-4) var(--sp-3); }
.history-item { min-height: 40px; border-radius: var(--r-control); }
.history-item.active { box-shadow: inset 3px 0 0 var(--brand-primary); }
.history-btn { width: 28px; height: 28px; }
.nanobanana-studio-btn { min-height: 56px; }
.banana-icon { animation: none; }
.nanobanana-studio-btn:hover .banana-icon { animation: slight-tilt 1.2s ease-in-out; }
.keyboard-badge { display: none; }
@media (hover: hover) and (min-width: 1025px) { .keyboard-badge { display: inline-block; } }
@media (hover: none) { .history-actions { display: flex; } }

/* --------------------------------------------------------------------------
   4. Topbar & Chat
   -------------------------------------------------------------------------- */
.chat-topbar { gap: var(--sp-3); }
.topbar-left { min-width: 0; flex: 1; }
.current-chat-header-info { min-width: 0; }
.topbar-actions { flex-shrink: 0; }
.icon-btn { min-height: 40px; min-width: 40px; justify-content: center; }
.topbar-nanobanana-btn { min-height: 40px; }

.messages-container { scroll-behavior: smooth; overscroll-behavior: contain; }
.message-row { padding: var(--sp-4) var(--sp-5); }
.message-content-wrapper { gap: var(--sp-4); }
.avatar { width: 34px; height: 34px; border-radius: var(--r-control); }

/* Messaggio utente: bolla a destra, compatta */
.message-row.user .message-content-wrapper { flex-direction: row-reverse; }
.message-row.user .avatar,
.message-row.user .author-name { display: none; }
.message-row.user .message-bubble {
  flex: 0 1 auto;
  max-width: min(85%, 620px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 18px 18px 6px 18px;
  padding: 10px var(--sp-4);
}
.message-row.user .message-header { justify-content: flex-end; margin-bottom: 2px; }
.message-row.user .message-time { margin-left: 0; }
.message-row.user .markdown-body { line-height: 1.55; }

.markdown-body { font-size: var(--fs-base); line-height: 1.7; overflow-wrap: anywhere; }
.markdown-body pre { max-width: 100%; }
.markdown-body img { max-width: 100%; height: auto; border-radius: var(--r-control); }
.markdown-body table { display: block; max-width: 100%; overflow-x: auto; }
.chat-thumb-img { max-width: min(280px, 100%); }

/* Code block */
.code-block-container { border-radius: var(--r-control); margin: var(--sp-3) 0; }
.code-block-header { min-height: 36px; }
.copy-code-btn { min-height: 28px; transition: background-color 0.15s, color 0.15s; }
.code-block-container pre { font-size: 0.85rem; -webkit-overflow-scrolling: touch; }

/* Azioni messaggio, typing, annulla */
.action-pill-btn { min-height: 32px; }
.cancel-stream-btn { min-height: 28px; padding: 0 var(--sp-3); border-radius: var(--r-control); font-weight: 600; transition: background-color 0.15s; margin-left: auto; }
.cancel-stream-btn:hover { background: rgba(255, 92, 92, 0.2); }
.typing-dots span { width: 6px; height: 6px; }

/* Welcome */
.welcome-screen { padding: var(--sp-6) var(--sp-5) var(--sp-5); }
.suggestion-card { transition: transform 0.2s var(--ease), background-color 0.2s, border-color 0.2s; }

/* Composer */
.chat-input-area { padding: 0 var(--sp-5) max(var(--sp-4), env(safe-area-inset-bottom)); }
.input-wrapper { border-radius: 24px; padding: 8px 8px 8px 12px; }
.input-wrapper textarea { font-size: var(--fs-base); }
.composer-attach-btn { min-height: 40px; min-width: 40px; justify-content: center; }
.composer-model-trigger { min-height: 40px; max-width: 220px; }
.model-trigger-name { overflow: hidden; text-overflow: ellipsis; }
.composer-model-menu { border-radius: var(--r-card); }
.composer-model-option { min-height: var(--touch); border-radius: var(--r-control); }
.send-btn {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--brand-gradient); color: #fff;
  box-shadow: 0 2px 10px var(--brand-glow);
  transition: transform 0.18s var(--ease), opacity 0.18s ease, box-shadow 0.18s ease;
}
.send-btn:disabled { background: var(--bg-surface-hover); color: var(--text-muted); box-shadow: none; opacity: 1; }
@media (hover: hover) { .send-btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 18px var(--brand-glow); } }
.chat-footer-disclaimer { padding: 0 var(--sp-2); }

/* --------------------------------------------------------------------------
   5. NanoBanana Studio — modal ridisegnato
   -------------------------------------------------------------------------- */
.studio-modal-overlay {
  background: rgba(5, 7, 13, 0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: clamp(12px, 3vw, 32px);
  align-items: center;
  justify-content: center;
}

.studio-modal-container {
  width: min(100%, 960px);
  max-height: min(92vh, 780px);
  max-height: min(92dvh, 780px);
  border-radius: var(--r-modal);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

.studio-modal-header { padding: var(--sp-4) var(--sp-4) var(--sp-4) var(--sp-5); gap: var(--sp-4); flex-shrink: 0; }
.studio-title-box { min-width: 0; gap: var(--sp-3); }
.studio-logo-banana { font-size: 1.8rem; line-height: 1; }
.studio-title-text { min-width: 0; }
.studio-title { font-size: var(--fs-lg); font-weight: 700; letter-spacing: -0.2px; line-height: 1.25; }
.studio-subtitle { font-size: var(--fs-xs); line-height: 1.4; margin-top: 2px; }

/* Chiusura: bottone rotondo nell'angolo in alto a destra dell'header */
.studio-close-btn {
  flex-shrink: 0;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1rem;
  transition: background-color 0.15s, color 0.15s, transform 0.18s var(--ease);
}
.studio-close-btn:hover { background: var(--glass-bg-hover); color: var(--text-main); }
.studio-close-btn:active { transform: scale(0.94); }

.studio-tabs { flex-shrink: 0; padding: 0 var(--sp-4); }
.studio-tab-btn { min-height: 48px; padding: 0 var(--sp-4); }
.studio-tab-btn:focus-visible { box-shadow: inset 0 0 0 2px var(--brand-secondary); border-radius: var(--r-control); }

.studio-tab-content { padding: var(--sp-5); min-height: 0; overscroll-behavior: contain; }
.studio-tab-content.active { display: block; }

.studio-form-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--sp-5);
  align-items: start;
}

.studio-input-column { gap: var(--sp-3); min-width: 0; }
.studio-field-label { font-size: var(--fs-sm); }
.studio-textarea { padding: var(--sp-3) var(--sp-4); font-size: var(--fs-base); line-height: 1.5; min-height: 132px; resize: vertical; transition: border-color 0.15s, box-shadow 0.15s; }
.studio-textarea:focus { border-color: var(--brand-primary); box-shadow: 0 0 0 3px var(--brand-glow); }
.studio-chips-row { gap: var(--sp-2); }
.studio-chip { min-height: 32px; padding: 0 var(--sp-3); font-size: var(--fs-xs); }
.studio-primary-btn { width: 100%; margin-top: var(--sp-2); min-height: 48px; font-size: 0.92rem; }

/* Colonna risultato: tutto centrato */
.studio-result-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  min-width: 0;
  min-height: 0;
  background: none;
  border: none;
  border-radius: 0;
  overflow: visible;
  position: static;
}

/* Cornice quadrata: l'immagine non esce MAI dal contenitore */
.studio-frame {
  position: relative;
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(45deg, rgba(128, 128, 128, 0.08) 25%, transparent 25%, transparent 75%, rgba(128, 128, 128, 0.08) 75%) 0 0 / 20px 20px,
    var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--r-card);
}
.studio-frame > * { grid-area: 1 / 1; }

.studio-result-image {
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: contain;
  object-position: center;
  display: block;
}

.studio-preview-placeholder { width: 100%; height: 100%; padding: var(--sp-5); display: flex; align-items: center; justify-content: center; }
.preview-empty-state { text-align: center; color: var(--text-muted); font-size: var(--fs-sm); max-width: 220px; line-height: 1.5; }
.empty-icon { font-size: 2.4rem; margin-bottom: var(--sp-2); }

.studio-loading { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--sp-3); color: var(--text-secondary); font-size: var(--fs-sm); background: var(--bg-surface); width: 100%; height: 100%; }
.loading-ring { width: 40px; height: 40px; border-radius: 50%; border: 3px solid var(--border-color); border-top-color: var(--banana-yellow); animation: spin 0.9s linear infinite; }

.studio-result-meta {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  text-align: center;
}
.image-engine-tag { display: inline-block; padding: 4px var(--sp-3); border-radius: var(--radius-pill); background: rgba(234, 179, 8, 0.12); border: 1px solid rgba(234, 179, 8, 0.3); color: var(--banana-yellow); font-size: var(--fs-xs); font-weight: 600; }
.image-engine-tag.is-preview { background: var(--warn-bg); border-color: var(--warn-border); color: var(--warn-text); }
.studio-notice { width: 100%; padding: var(--sp-3); border-radius: var(--r-control); background: var(--warn-bg); border: 1px solid var(--warn-border); color: var(--warn-text); font-size: var(--fs-xs); line-height: 1.5; text-align: left; }
.image-actions-row { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--sp-2); width: 100%; }

/* Galleria */
.gallery-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: var(--sp-4); }
.gallery-card { border-radius: var(--r-card); display: flex; flex-direction: column; }
.gallery-thumb { display: block; width: 100%; aspect-ratio: 1 / 1; padding: 0; border: 0; background: var(--bg-code); cursor: zoom-in; overflow: hidden; }
.gallery-card-img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s var(--ease); }
@media (hover: hover) { .gallery-thumb:hover .gallery-card-img { transform: scale(1.04); } }
.gallery-card-info { padding: var(--sp-3); gap: var(--sp-2); }
.gallery-download-btn { display: inline-flex; align-items: center; min-height: 32px; margin: 0; }
.gallery-empty { grid-column: 1 / -1; text-align: center; color: var(--text-muted); font-size: var(--fs-sm); padding: var(--sp-6) var(--sp-4); }

/* --------------------------------------------------------------------------
   6. Anteprima immagine (lightbox)
   -------------------------------------------------------------------------- */
.image-modal-overlay { padding: clamp(12px, 3vw, 32px); background: rgba(5, 7, 13, 0.72); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.image-modal-content {
  position: relative;
  width: min(100%, 720px);
  max-width: none;
  max-height: 92vh;
  max-height: 92dvh;
  padding: 60px var(--sp-5) var(--sp-5);
  gap: var(--sp-4);
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--r-modal);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
  align-items: center;
}
.image-modal-close {
  position: absolute; top: 12px; right: 12px;
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 50%; background: var(--glass-bg); border: 1px solid var(--border-color);
  color: var(--text-secondary); font-size: 1rem; transition: background-color 0.15s, color 0.15s;
}
.image-modal-close:hover { background: var(--glass-bg-hover); color: var(--text-main); }
.image-modal-frame { width: 100%; min-height: 0; display: grid; place-items: center; }
.image-modal-content img {
  display: block;
  max-width: 100%;
  max-height: calc(92vh - 180px);
  max-height: calc(92dvh - 180px);
  width: auto; height: auto;
  object-fit: contain;
  border-radius: var(--r-card);
  border: 1px solid var(--border-color);
  box-shadow: none;
}
.image-modal-actions { display: flex; justify-content: center; width: 100%; }

/* Toast */
.toast { border-radius: var(--r-control); max-width: min(92vw, 380px); }

/* --------------------------------------------------------------------------
   7. LARGE DESKTOP (>= 1600)
   -------------------------------------------------------------------------- */
@media (min-width: 1600px) {
  :root { --input-max-width: 880px; --sidebar-width: 290px; }
  .studio-modal-container { width: min(100%, 1040px); max-height: min(88dvh, 820px); }
  .studio-frame, .studio-result-meta { max-width: 480px; }
}

/* --------------------------------------------------------------------------
   8. LAPTOP (1025 - 1279): sidebar leggermente piu' compatta
   -------------------------------------------------------------------------- */
@media (min-width: 1025px) and (max-width: 1279px) {
  :root { --sidebar-width: 260px; }
}

/* --------------------------------------------------------------------------
   9. TABLET (769 - 1024): sidebar persistente stretta + workspace
      Layout:  [ Sidebar 240 | Workspace ]  con topbar compatta
   -------------------------------------------------------------------------- */
@media (min-width: 769px) and (max-width: 1024px) {
  :root { --sidebar-width: 240px; --topbar-height: 58px; --input-max-width: 100%; }

  .chat-topbar { padding: 0 var(--sp-4); }
  .btn-text-desktop { display: none; }
  .attach-btn-label { display: none; }
  .current-chat-title { max-width: 220px; }

  .message-row { padding: var(--sp-4); }
  .message-content-wrapper { max-width: 720px; margin-inline: auto; }
  .chat-input-area { padding: 0 var(--sp-4) max(var(--sp-3), env(safe-area-inset-bottom)); }
  .input-box-container { max-width: 720px; }
  .welcome-title { font-size: 1.8rem; }
  .welcome-screen { padding: var(--sp-5) var(--sp-4); }

  /* Modal tablet: due colonne piu' compatte, ancora centrato */
  .studio-modal-container { width: min(100%, 800px); }
  .studio-tab-content { padding: var(--sp-4) var(--sp-5) var(--sp-5); }
  .studio-form-layout { gap: var(--sp-4); }
  .gallery-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* Portrait tablet stretto: una sola colonna nel modal (<= 860) */
@media (max-width: 860px) {
  .studio-form-layout { grid-template-columns: minmax(0, 1fr); gap: var(--sp-5); }
  .studio-frame, .studio-result-meta { max-width: 400px; }
}

/* --------------------------------------------------------------------------
   10. MOBILE (<= 768): esperienza dedicata, non un desktop rimpicciolito
       - sidebar -> drawer a slide con overlay
       - composer a due righe (testo sopra, controlli sotto)
       - modal NanoBanana -> bottom sheet a tutta larghezza
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  :root { --topbar-height: 56px; --input-max-width: 100%; }

  /* Drawer */
  .sidebar {
    width: min(86vw, 320px);
    z-index: 60;
    box-shadow: none;
    padding-bottom: env(safe-area-inset-bottom);
    transition: transform 0.28s var(--ease), box-shadow 0.28s ease;
  }
  .sidebar.open { box-shadow: 8px 0 40px rgba(0, 0, 0, 0.5); }
  .sidebar-overlay { z-index: 55; backdrop-filter: none; background-color: rgba(0, 0, 0, 0.55); }
  .close-sidebar-btn { min-width: 40px; min-height: 40px; justify-content: center; }
  .sidebar-header { padding-top: max(var(--sp-4), env(safe-area-inset-top)); }

  /* Topbar compatta e dinamica, zero collisioni su schermi da 320px a 430px */
  .chat-topbar { padding: 0 var(--sp-3); padding-top: env(safe-area-inset-top); height: calc(var(--topbar-height) + env(safe-area-inset-top)); gap: var(--sp-2); min-width: 0; }
  .topbar-left { gap: var(--sp-2); min-width: 0; flex: 1 1 auto; overflow: hidden; }
  .mobile-menu-btn { display: inline-flex; padding: 0; flex-shrink: 0; }
  .current-chat-header-info { min-width: 0; overflow: hidden; display: flex; align-items: center; gap: 6px; }
  .current-chat-title { font-size: var(--fs-sm); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: clamp(100px, 30vw, 220px); }
  .active-chat-status { padding: 3px 6px; flex-shrink: 0; font-size: 0.75rem; }
  .topbar-actions { gap: 6px; flex-shrink: 0; }
  .btn-text-desktop { display: none; }
  .icon-btn { padding: 0; flex-shrink: 0; }
  .topbar-nanobanana-btn { padding: 0; width: 40px; justify-content: center; flex-shrink: 0; }
  .topbar-nanobanana-btn span:last-child { display: none; }
  .topbar-link-btn { padding: 0 8px; font-size: 0.8rem; }

  @media (max-width: 480px) {
    .active-chat-status .status-text { display: none; }
    .topbar-weekly-btn { display: none; }
    .current-chat-title { max-width: 120px; }
  }

  @media (max-width: 360px) {
    .current-chat-title { display: none; }
    .active-chat-status { margin-left: 2px; }
  }

  /* Messaggi */
  .message-row { padding: var(--sp-3) var(--sp-3); }
  .message-content-wrapper { gap: var(--sp-3); }
  .avatar { width: 30px; height: 30px; font-size: 0.78rem; }
  .message-row.user .message-bubble { max-width: 92%; }
  .markdown-body { font-size: 0.93rem; }
  .code-block-container pre { font-size: 0.8rem; padding: var(--sp-3); }

  /* Welcome */
  .welcome-screen { padding: var(--sp-4) var(--sp-4) var(--sp-3); margin-block: auto; }
  .welcome-title { font-size: 1.5rem; margin-bottom: var(--sp-2); }
  .welcome-subtitle { font-size: var(--fs-sm); margin-bottom: var(--sp-4); }
  .welcome-icon svg { width: 44px; height: 44px; }
  .welcome-company { font-size: 1.15rem; }
  .guest-welcome-banner { font-size: var(--fs-xs); padding: var(--sp-3); margin-bottom: var(--sp-4); }
  .suggestion-grid { grid-template-columns: 1fr; gap: var(--sp-2); }
  .suggestion-card { padding: var(--sp-3); gap: 4px; }

  /* Composer: riga 1 = textarea, riga 2 = [allega] [modello] [invia] */
  .chat-input-area { padding: 0 var(--sp-3) max(var(--sp-3), env(safe-area-inset-bottom)); }
  .input-wrapper {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas:
      "text text text"
      "attach model send";
    align-items: center;
    gap: 6px var(--sp-2);
    padding: var(--sp-3);
    border-radius: 20px;
  }
  .input-wrapper textarea { grid-area: text; font-size: 16px; /* evita lo zoom automatico su iOS */ max-height: 140px; padding: 4px 6px; }
  .composer-attach-btn { grid-area: attach; }
  .composer-model-dropdown-wrapper { grid-area: model; position: static; min-width: 0; }
  .composer-model-trigger { max-width: 100%; }
  .send-btn { grid-area: send; width: 44px; height: 44px; }
  .attach-btn-label { display: none; }
  .chat-footer-disclaimer { display: none; }

  /* Menu modelli: bottom sheet ancorato al composer, a tutta larghezza */
  .composer-model-menu { position: absolute; left: 0; right: 0; bottom: calc(100% + 10px); width: auto; backdrop-filter: none; max-height: 60dvh; overflow-y: auto; }

  /* Toast sopra il composer */
  .toast-container { left: var(--sp-3); right: var(--sp-3); bottom: calc(110px + env(safe-area-inset-bottom)); align-items: center; }

  /* NanoBanana: bottom sheet */
  .studio-modal-overlay { padding: 0; align-items: flex-end; background: rgba(5, 7, 13, 0.7); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
  .studio-modal-container {
    width: 100%;
    max-height: 94vh;
    max-height: 94dvh;
    border-radius: var(--r-modal) var(--r-modal) 0 0;
    border-bottom: 0;
    animation: sheetUp 0.3s var(--ease);
  }
  .studio-modal-container::before { content: ""; display: block; width: 40px; height: 4px; border-radius: 4px; background: var(--border-color-hover); margin: 8px auto 0; flex-shrink: 0; }
  .studio-modal-header { padding: var(--sp-3) var(--sp-3) var(--sp-3) var(--sp-4); }
  .studio-logo-banana { font-size: 1.6rem; }
  .studio-subtitle { display: none; }
  .studio-tabs { padding: 0 var(--sp-3); }
  .studio-tab-btn { flex: 1; justify-content: center; }
  .studio-tab-content { padding: var(--sp-4) var(--sp-4) calc(var(--sp-4) + env(safe-area-inset-bottom)); }
  .studio-textarea { min-height: 112px; font-size: 16px; }
  .studio-frame, .studio-result-meta { max-width: none; }
  .image-actions-row .studio-btn-primary { flex: 1 1 100%; }
  .image-actions-row .studio-btn-secondary,
  .image-actions-row .studio-btn-ghost { flex: 1 1 0; padding: 0 var(--sp-2); }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-3); }

  /* Lightbox a tutta larghezza */
  .image-modal-content { width: 100%; padding: 56px var(--sp-3) var(--sp-4); border-radius: var(--r-modal); }
  .image-modal-actions .studio-btn { width: 100%; }

  /* Modal auth: pieno schermo comodo */
  .auth-modal-overlay { padding: var(--sp-3); align-items: flex-end; }
  .auth-modal-card { padding: var(--sp-5) var(--sp-4) var(--sp-5); max-height: 94dvh; overflow-y: auto; }
  .form-group input { font-size: 16px; }
}

@keyframes sheetUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* --------------------------------------------------------------------------
   11. MOBILE SMALL (<= 380)
   -------------------------------------------------------------------------- */
@media (max-width: 380px) {
  .studio-title { font-size: 1rem; }
  .active-chat-status .status-text { display: none; }
  .active-chat-status { padding: 6px; }
  .composer-model-trigger { padding: 0 10px; font-size: var(--fs-xs); }
  .model-trigger-icon { display: none; }
  .welcome-title { font-size: 1.3rem; }
  .gallery-grid { gap: var(--sp-2); }
}

/* Schermi bassi in landscape: modal e lightbox sfruttano l'altezza */
@media (max-height: 520px) and (orientation: landscape) {
  .studio-modal-container { max-height: 100dvh; border-radius: 0; }
  .image-modal-content img { max-height: calc(100dvh - 150px); }
  .welcome-screen { padding-block: var(--sp-2); }
}

/* --------------------------------------------------------------------------
   12. Accessibilita' & performance
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* Su dispositivi touch niente effetti hover "appiccicosi" */
@media (hover: none) {
  .suggestion-card:hover, .gallery-card:hover { transform: none; }
}

/* Meno blur su schermi piccoli = rendering piu' fluido */
@media (max-width: 768px) {
  .composer-model-menu, .auth-modal-overlay { backdrop-filter: none; -webkit-backdrop-filter: none; }
}

/* --------------------------------------------------------------------------
   13. SASONIS STUDIOS — MISTRAL IMAGE GENERATION ENGINE & CONTROLS
   -------------------------------------------------------------------------- */
.studio-engine-info-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin: var(--sp-2) 0 var(--sp-3);
}

.studio-engine-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.25);
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  color: var(--text-secondary);
}

.engine-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
  animation: enginePulse 2s infinite;
}

@keyframes enginePulse {
  0%, 100% { opacity: 0.6; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.2); }
}

.engine-label {
  font-weight: 600;
  color: var(--text-primary);
}

.engine-tag-sub {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1px 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--text-muted);
}

.studio-generate-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  width: 100%;
}

.studio-generate-controls .studio-primary-btn {
  flex: 1;
}

.studio-stop-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 44px;
  padding: 0 16px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: var(--r-btn);
  color: #fca5a5;
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.studio-stop-btn:hover {
  background: rgba(239, 68, 68, 0.22);
  color: #fff;
  transform: scale(1.02);
}

.studio-stop-btn:active {
  transform: scale(0.96);
}

.loading-stage-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: var(--sp-2);
}

.loading-stage-desc {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-bottom: var(--sp-3);
  text-align: center;
}

.studio-stop-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--r-full);
  color: #fca5a5;
  font-size: var(--fs-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}

.studio-stop-pill:hover {
  background: rgba(239, 68, 68, 0.28);
  color: #fff;
  transform: scale(1.04);
}

.studio-stop-pill:active {
  transform: scale(0.96);
}

/* --------------------------------------------------------------------------
   14. ANIMAZIONI FLUIDE E MICRO-INTERACTIONS
   -------------------------------------------------------------------------- */
.message-row {
  animation: messageFadeUp 0.28s var(--ease) forwards;
}

@keyframes messageFadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.studio-result-image {
  animation: imageFadeScale 0.35s var(--ease) forwards;
}

@keyframes imageFadeScale {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Micro click feedback on buttons */
.studio-btn:active,
.primary-auth-btn:active,
.header-cta-btn:active,
.send-btn:active {
  transform: scale(0.97) !important;
}

/* Micro movement on cards hover */
.suggestion-card {
  transition: transform var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease), background var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}

.suggestion-card:hover .suggestion-icon {
  transform: translateY(-2px) scale(1.06);
  transition: transform var(--dur-base) var(--ease);
}

.gallery-card {
  transition: transform var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}

.gallery-card .gallery-card-img {
  transition: transform 0.35s var(--ease);
}

.gallery-card:hover .gallery-card-img {
  transform: scale(1.03);
}

/* ==========================================================================
   WEEKLY AI REPORT MODAL & TOPBAR ACTION POLISH
   Exclusive to Sasonis AI Platform
   ========================================================================== */

.topbar-weekly-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.3);
  color: #c084fc;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.topbar-weekly-btn:hover {
  background: rgba(168, 85, 247, 0.22);
  border-color: #c084fc;
  color: #fff;
  transform: translateY(-1px);
}

.topbar-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.topbar-link-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.topbar-link-btn.admin-badge {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
}

.weekly-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 105;
  background: rgba(5, 7, 13, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.weekly-modal-overlay.show {
  display: flex;
}

.weekly-modal-card {
  width: 100%;
  max-width: 620px;
  background: #0d0f17;
  border: 1px solid rgba(168, 85, 247, 0.25);
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 40px rgba(168, 85, 247, 0.12);
  animation: modalScale 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.weekly-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.weekly-badge {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
  margin-bottom: 6px;
}

.weekly-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.weekly-subtitle {
  font-size: 0.82rem;
  color: #94a3b8;
}

.weekly-close-btn {
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s ease;
}

.weekly-close-btn:hover {
  color: #fff;
}

.weekly-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.weekly-stat-tile {
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.weekly-tile-label {
  font-size: 0.72rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 4px;
}

.weekly-tile-val {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
}

.weekly-tile-val.highlight {
  color: #38bdf8;
}

.weekly-chart-box {
  padding: 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 16px;
}

.weekly-chart-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 12px;
}

.weekly-days-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  height: 90px;
  padding-top: 10px;
  gap: 8px;
}

.day-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  height: 100%;
  justify-content: flex-end;
}

.day-bar-fill {
  width: 100%;
  max-width: 28px;
  background: linear-gradient(180deg, #c084fc, #6366f1);
  border-radius: 4px 4px 0 0;
  min-height: 4px;
  transition: height 0.4s ease;
}

.day-bar-label {
  font-size: 0.68rem;
  color: #64748b;
  font-family: 'JetBrains Mono', monospace;
}

.weekly-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.weekly-footer-note {
  font-size: 0.72rem;
  color: #64748b;
}

.weekly-btn {
  padding: 8px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.weekly-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.weekly-loading {
  padding: 30px;
  text-align: center;
  color: #94a3b8;
  font-size: 0.88rem;
}

@media (max-width: 600px) {
  .weekly-stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================================
   MOBILE LANDSCAPE OPTIMIZATION
   ======================================================== */
@media (max-height: 520px) and (orientation: landscape) {
  :root { --topbar-height: 44px; }
  .chat-topbar { height: calc(var(--topbar-height) + env(safe-area-inset-top)); padding: 0 var(--sp-3); }
  .welcome-screen { padding: var(--sp-2) var(--sp-3); margin-block: 0; }
  .welcome-title { font-size: 1.25rem; margin-bottom: 4px; }
  .welcome-icon { display: none; }
  .guest-welcome-banner { margin-bottom: 8px; padding: 6px 12px; }
  .suggestion-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .suggestion-card { padding: 8px 10px; }
  .input-wrapper textarea { max-height: 72px; }
  .studio-modal-container { max-height: 94vh; }
  .chat-input-area { padding-bottom: max(6px, env(safe-area-inset-bottom)); }
}