/* ============================================================================
   LocalMind — AI Workspace UI
   Dark-first · glassmorphism · depth system · Inter · single accent
   ========================================================================== */

:root {
  /* base surfaces (light) */
  --bg-0:        #ffffff;
  --bg-1:        #fafafa;
  --bg-2:        #f4f4f5;
  --surface-1:   #efefef;
  --surface-2:   #e5e5e8;
  --surface-3:   #d8d8dc;
  --glass:       rgba(255, 255, 255, 0.80);
  --glass-strong:rgba(255, 255, 255, 0.96);
  --border:      rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);

  /* accent (single) */
  --accent:      #6c5ce7;
  --accent-2:    #8b7ff5;
  --accent-soft: rgba(108, 92, 231, 0.10);
  --accent-glow: rgba(108, 92, 231, 0.25);

  /* text */
  --text:        #1a1a2e;
  --text-soft:   #4a4a68;
  --text-muted:  #7878a0;
  --text-faint:  #a8a8c0;

  /* semantic */
  --error:       #dc2626;
  --error-soft:  rgba(220, 38, 38, 0.10);
  --success:     #16a34a;
  --warn:        #d97706;

  --radius:      21px;
  --radius-sm:   14px;
  --radius-lg:   30px;
  --shadow-1:    0 1px 2px rgba(0,0,0,.08);
  --shadow-2:    0 8px 30px rgba(0,0,0,.10);
  --shadow-pop:  0 24px 70px rgba(0,0,0,.16);
  --ease:        cubic-bezier(.22,.61,.36,1);
  --t:           200ms var(--ease);

  --sidebar-w:   420px;
  --ctx-w:       480px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }
html { font-size: 150%; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 24px;
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(108,92,231,.06), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(22,163,74,.04), transparent 55%),
    var(--bg-0);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

.hidden { display: none !important; }
.glass {
  background: var(--glass);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  border: 1px solid var(--border);
}

button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 12px; border: 3px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: #b8b8c8; background-clip: padding-box; }

/* ============================================================================
   Login
   ========================================================================== */
#login-view {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; position: relative; overflow: hidden;
}
.login-aurora {
  position: absolute; inset: -20%;
  background:
    radial-gradient(600px 400px at 30% 30%, rgba(108,92,231,.18), transparent 60%),
    radial-gradient(500px 380px at 70% 70%, rgba(139,127,245,.12), transparent 60%);
  filter: blur(30px);
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift { to { transform: translate3d(40px, -30px, 0) scale(1.08); } }

.login-box {
  position: relative; z-index: 1;
  border-radius: var(--radius-lg);
  padding: 63px 57px;
  width: 570px;
  box-shadow: var(--shadow-pop);
  animation: pop-in 360ms var(--ease);
}
.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.brand-mark {
  color: var(--accent); font-size: 1.4rem;
  text-shadow: 0 0 18px var(--accent-glow);
}
.brand-mark.sm { font-size: 1.15rem; }
.login-box h1 { font-size: 1.7rem; font-weight: 800; }
.login-box .subtitle { color: var(--text-muted); font-size: .82rem; margin-bottom: 26px; }

.login-box input {
  display: block; width: 100%;
  padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface-1); color: var(--text);
  font-size: .92rem; margin-bottom: 12px; outline: none;
  transition: border-color var(--t), box-shadow var(--t);
}
.login-box input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.btn-primary {
  width: 100%; padding: 12px 14px; border: none; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 600; font-size: .92rem; margin-bottom: 10px;
  box-shadow: 0 8px 24px -8px var(--accent-glow);
  transition: transform var(--t), box-shadow var(--t), filter var(--t);
}
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.06); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  width: 100%; padding: 11px 14px; border-radius: var(--radius-sm);
  background: transparent; border: 1px solid var(--border-strong);
  color: var(--text-soft); font-weight: 500; font-size: .9rem;
  transition: border-color var(--t), color var(--t), background var(--t);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--text); background: var(--accent-soft); }

.error {
  color: var(--error); font-size: .82rem; text-align: center;
  padding: 9px 12px; background: var(--error-soft);
  border-radius: var(--radius-sm); margin-top: 12px;
  animation: pop-in 180ms var(--ease);
}

/* ============================================================================
   Main layout — 3 panes
   ========================================================================== */
#main-view { display: flex; height: 100vh; }

/* ░░ Left sidebar ░░ */
.sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: margin-left var(--t), opacity var(--t);
}
.sidebar.collapsed { margin-left: calc(-1 * var(--sidebar-w)); opacity: 0; pointer-events: none; }

.sidebar-top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 16px 12px;
}
.brand-row { display: flex; align-items: center; gap: 9px; }
.app-name { font-weight: 700; font-size: 1.2rem; }

.icon-btn {
  background: transparent; border: 1px solid transparent; color: var(--text-muted);
  width: 51px; height: 51px; border-radius: 14px; font-size: 1.1rem;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

.new-chat-btn {
  margin: 4px 14px 12px; padding: 12px 14px;
  display: flex; align-items: center; gap: 8px;
  background: var(--accent-soft); border: 1px solid var(--border-strong);
  color: var(--text); border-radius: var(--radius-sm);
  font-size: 1rem; font-weight: 600;
  transition: background var(--t), border-color var(--t), transform var(--t);
}
.new-chat-btn:hover { background: rgba(124,108,255,.22); border-color: var(--accent); }
.new-chat-btn:active { transform: scale(.98); }
.new-chat-btn .plus { color: var(--accent); font-size: 1.1rem; line-height: 1; }
.new-chat-btn .kbd { margin-left: auto; }

.kbd {
  font-size: .68rem; color: var(--text-faint);
  border: 1px solid var(--border-strong); border-radius: 5px;
  padding: 1px 6px; background: var(--surface-1);
}

.search-row {
  margin: 0 14px 8px; display: flex; align-items: center; gap: 8px;
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 11px;
  transition: border-color var(--t);
}
.search-row:focus-within { border-color: var(--accent); }
.search-ico { color: var(--text-faint); font-size: .95rem; }
.search-row input { flex: 1; background: transparent; border: none; outline: none; color: var(--text); font-size: .9rem; }

.sidebar-scroll { flex: 1; overflow-y: auto; padding: 8px 8px 12px; }

.nav-section { margin-bottom: 14px; }
.nav-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 8px;
}
.nav-head h3 {
  font-size: .82rem; color: var(--text-faint);
  text-transform: uppercase; letter-spacing: .09em; font-weight: 800;
}
.mini-add {
  width: 39px; height: 39px; border-radius: 9px; line-height: 1;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-muted); font-size: 1rem;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.mini-add:hover { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.nav-list { display: flex; flex-direction: column; gap: 2px; }
#conversation-list { max-height: 220px; overflow-y: auto; }
.nav-item {
  display: flex; align-items: center; gap: 9px;
  padding: 10px 10px; border-radius: 8px;
  color: var(--text-soft); font-size: 1rem;
  cursor: pointer; position: relative;
  transition: background var(--t), color var(--t);
  animation: fade-in 220ms var(--ease);
}
.nav-item:hover { background: var(--surface-1); color: var(--text); }
.nav-item.active { background: var(--accent-soft); color: var(--text); }
.nav-item.active::before {
  content: ""; position: absolute; left: 0; top: 18%; bottom: 18%;
  width: 5px; border-radius: 5px; background: var(--accent);
}
.nav-item .ni-ico { font-size: .9rem; opacity: .8; flex-shrink: 0; }
.nav-item .ni-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .ni-meta { font-size: .8rem; color: var(--text-faint); flex-shrink: 0; }
.nav-item .ni-del {
  opacity: 0; background: transparent; border: none; color: var(--text-faint);
  font-size: .9rem; padding: 0 2px; flex-shrink: 0;
  transition: opacity var(--t), color var(--t);
}
.nav-item:hover .ni-del { opacity: 1; }
.nav-item .ni-del:hover { color: var(--error); }
.nav-item.set-active { background: rgba(68,214,160,.12); }
.nav-item.set-active::before { background: var(--success); }

.muted-empty { font-size: .88rem; color: var(--text-faint); padding: 6px 10px; display: block; }

/* documents */
.upload-status { font-size: .76rem; padding: 0 8px; min-height: 0; color: var(--text-muted); word-break: break-word; transition: all var(--t); }
.upload-status:not(:empty) { min-height: 18px; padding: 4px 8px; }

/* upload progress */
.upload-progress-wrap {
  margin: 4px 8px 2px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px 7px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: opacity var(--t);
}
.upload-progress-header {
  display: flex;
  align-items: center;
  gap: 7px;
  overflow: hidden;
}
.upload-spinner {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  border: 2px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 700ms linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
.upload-current-name {
  font-size: .74rem;
  color: var(--text-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.upload-count {
  flex-shrink: 0;
  font-size: .72rem;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.upload-bar-track {
  height: 4px;
  background: var(--surface-3);
  border-radius: 4px;
  overflow: hidden;
}
.upload-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  width: 0%;
  transition: width 300ms var(--ease);
}
.doc-filter-row { display: flex; gap: 6px; padding: 6px 8px; }
.doc-filter-row input {
  flex: 1; min-width: 0; background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 7px; padding: 5px 9px; color: var(--text); font-size: .83rem; outline: none;
  transition: border-color var(--t);
}
.doc-filter-row input:focus { border-color: var(--accent); }
.chip-btn {
  background: var(--surface-1); border: 1px solid var(--border); color: var(--text-muted);
  border-radius: 7px; padding: 4px 9px; font-size: .78rem;
  transition: all var(--t);
}
.chip-btn:hover { border-color: var(--accent); color: var(--text); }

.doc-list { display: flex; flex-direction: column; gap: 2px; padding: 2px 4px; }
.doc-row {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 7px;
  transition: background var(--t); animation: fade-in 200ms var(--ease);
}
.doc-row:hover { background: var(--surface-1); }
.doc-row input[type="checkbox"] { accent-color: var(--accent); width: 21px; height: 21px; flex-shrink: 0; }
.doc-row label { flex: 1; font-size: .875rem; color: var(--text-soft); cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-row .doc-chunks { font-size: .75rem; color: var(--text-faint); flex-shrink: 0; }
.doc-row .doc-del {
  opacity: 0; background: transparent; border: none; color: var(--text-faint);
  flex-shrink: 0; padding: 2px; border-radius: 5px; display: inline-flex;
  transition: opacity var(--t), color var(--t), background var(--t);
}
.doc-row:hover .doc-del { opacity: 1; }
.doc-row .doc-del:hover { color: var(--error); background: var(--error-soft); }

/* ── document folder tree ── */
.tree-root-row {
  display: flex; align-items: center; gap: 7px;
  padding: 5px 8px 8px; font-size: .78rem;
  text-transform: uppercase; letter-spacing: .07em;
  font-weight: 800; color: var(--text-faint);
}
.tree-root-count { margin-left: auto; font-size: .75rem; }
.tree-folder { margin-bottom: 1px; }
.tree-folder-row {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 8px; border-radius: 7px; cursor: pointer;
  color: var(--text-soft); font-size: 1rem;
  transition: background var(--t);
}
.tree-folder-row:hover { background: var(--surface-1); }
.tree-chevron { color: var(--text-faint); font-size: .8rem; width: 14px; flex-shrink: 0; line-height: 1; }
.tree-folder-ico { font-size: .95rem; flex-shrink: 0; }
.tree-folder-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.tree-folder-count { font-size: .75rem; color: var(--text-faint); flex-shrink: 0; }
.tree-folder-actions { display: flex; gap: 2px; opacity: 0; flex-shrink: 0; transition: opacity var(--t); }
.tree-folder-row:hover .tree-folder-actions { opacity: 1; }
.tree-action-btn {
  background: transparent; border: none; color: var(--text-faint);
  width: 33px; height: 33px; border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: .88rem; cursor: pointer;
  transition: color var(--t), background var(--t);
}
.tree-action-btn:hover { color: var(--text); background: var(--surface-2); }
.tree-folder-del-btn:hover { color: var(--error) !important; background: var(--error-soft) !important; }
.tree-children { padding-left: 10px; display: flex; flex-direction: column; gap: 1px; padding-bottom: 4px;
  border-left: 1.5px solid var(--border); margin-left: 14px; }
.tree-file {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 8px; border-radius: 7px;
  transition: background var(--t); animation: fade-in 200ms var(--ease);
  cursor: default;
}
.tree-file:hover { background: var(--surface-1); }
.tree-file input[type="checkbox"] { accent-color: var(--accent); width: 21px; height: 21px; flex-shrink: 0; cursor: pointer; }
.tree-file-ico { font-size: .85rem; flex-shrink: 0; opacity: .75; }
.tree-file label { flex: 1; font-size: .95rem; color: var(--text-soft); cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-file label:hover { color: var(--accent); }
.tree-file-dblclick-hint { font-size: .68rem; color: var(--text-faint); flex-shrink: 0; display: none; }
.tree-file:hover .tree-file-dblclick-hint { display: inline; }
.tree-file-chunks { font-size: .75rem; color: var(--text-faint); flex-shrink: 0; }
.tree-file-actions { display: flex; gap: 1px; opacity: 0; flex-shrink: 0; transition: opacity var(--t); }
.tree-file:hover .tree-file-actions { opacity: 1; }
.tree-move-btn { font-size: .85rem; }
.tree-file-del:hover { color: var(--error) !important; background: var(--error-soft) !important; }

.sidebar-foot {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-top: 1px solid var(--border);
}
.user-chip { display: flex; align-items: center; gap: 9px; flex: 1; min-width: 0; }
.avatar {
  width: 45px; height: 45px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 700; font-size: .82rem;
  display: inline-flex; align-items: center; justify-content: center;
}
.user-name { font-size: .9rem; color: var(--text-soft); overflow: hidden; text-overflow: ellipsis; }

/* ============================================================================
   Center — chat area
   ========================================================================== */
#chat-area { flex: 1; display: flex; flex-direction: column; min-width: 0; position: relative; }

#chat-topbar {
  height: 81px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 18px; border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(250,250,252,.85), transparent);
  backdrop-filter: blur(10px);
}
.topbar-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.conv-title { font-weight: 600; font-size: .97rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.set-badge {
  font-size: .72rem; color: var(--success); background: rgba(68,214,160,.12);
  border: 1px solid rgba(68,214,160,.3); border-radius: 999px; padding: 2px 10px;
}
.topbar-right { display: flex; align-items: center; gap: 8px; }
.ghost-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--surface-1); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: 999px; padding: 6px 12px;
  font-size: .78rem; font-weight: 500;
  transition: all var(--t);
}
.ghost-pill:hover { color: var(--text); border-color: var(--border-strong); }
.ghost-pill.active { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

.messages {
  flex: 1; overflow-y: auto;
  padding: 28px clamp(18px, 8vw, 120px) 20px;
  display: flex; flex-direction: column; gap: 22px;
  scroll-behavior: smooth;
}

/* empty state */
.empty-state {
  margin: auto; text-align: center; max-width: 1440px; width: 100%;
  animation: fade-in 320ms var(--ease);
}
.empty-mark {
  font-size: 2.6rem; color: var(--accent);
  text-shadow: 0 0 30px var(--accent-glow); margin-bottom: 12px;
}
.empty-state h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.empty-state p { color: var(--text-muted); font-size: .92rem; line-height: 1.6; margin-bottom: 22px; }
.empty-input-slot { width: 100%; }

/* ── user block ── */
.block { animation: rise-in 240ms var(--ease); }
.user-block { display: flex; justify-content: flex-end; }
.user-bubble {
  max-width: 80%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; padding: 12px 16px; border-radius: 16px 16px 5px 16px;
  font-size: .96rem; line-height: 1.55; white-space: pre-wrap; word-break: break-word;
  box-shadow: 0 8px 24px -10px var(--accent-glow);
}

/* ── AI response block ── */
.ai-block {
  background: linear-gradient(180deg, var(--surface-1), var(--bg-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2); overflow: hidden;
}
.ai-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
}
.ai-avatar {
  width: 39px; height: 39px; border-radius: 12px; flex-shrink: 0;
  background: var(--accent-soft); color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center; font-size: .85rem;
  box-shadow: inset 0 0 0 1px var(--border-strong);
}
.ai-title { font-weight: 600; font-size: .86rem; }
.ai-model { font-size: .72rem; color: var(--text-faint); margin-left: 2px; }
.ai-timing { font-size: .7rem; color: var(--text-faint); margin-left: 6px; opacity: .75; }
.ai-tokrate { font-size: .7rem; color: var(--text-faint); margin-left: 6px; opacity: .75; }
.ai-confidence { margin-left: auto; display: flex; align-items: center; gap: 7px; font-size: .72rem; color: var(--text-muted); }
.conf-bar { width: 81px; height: 8px; border-radius: 4px; background: var(--surface-3); overflow: hidden; }
.conf-fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--accent), var(--success)); transition: width 600ms var(--ease); }
.ai-collapse { background: transparent; border: none; color: var(--text-muted); font-size: .95rem; transition: color var(--t), transform var(--t); }
.ai-collapse:hover { color: var(--text); }

.ai-body { padding: 16px; transition: max-height var(--t), opacity var(--t), padding var(--t); }
.ai-block.collapsed .ai-body { display: none; }

.ai-answer { font-size: .96rem; line-height: 1.7; color: var(--text-soft); white-space: pre-wrap; word-break: break-word; }
.ai-answer .citation {
  color: var(--accent); background: var(--accent-soft);
  border-radius: 5px; padding: 0 5px; font-weight: 500; font-size: .85em;
  white-space: nowrap;
}
.ai-answer .insight {
  background: linear-gradient(transparent 60%, rgba(255,180,84,.22) 0);
  border-radius: 3px;
}
.ai-cursor::after {
  content: "▋"; color: var(--accent); margin-left: 1px;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* key points / insights */
.ai-insights { margin-top: 14px; border-top: 1px dashed var(--border); padding-top: 12px; }
.ai-insights-title { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin-bottom: 8px; }
.insight-item { display: flex; gap: 9px; font-size: .85rem; color: var(--text-soft); padding: 4px 0; line-height: 1.5; }
.insight-item .dot { color: var(--accent); flex-shrink: 0; }

/* sources strip */
.ai-sources { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }
.ai-sources-title { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin-bottom: 8px; }
.source-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.source-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 4px 10px; font-size: .76rem; color: var(--text-soft);
  cursor: pointer; transition: all var(--t);
}
.source-chip:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }
.source-chip .sc-score { color: var(--accent); font-weight: 600; font-size: .72rem; }

/* Excel/CSV tool ("Dati analizzati") block */
.ai-excel-block { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }
.ai-excel-head { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin-bottom: 8px; }
.ai-excel-block.ai-excel-error { color: var(--text-soft); border-top-color: var(--border); font-size: .85rem; }
.ai-excel-code-toggle { font-size: .7rem; color: var(--accent); margin-bottom: 6px; cursor: pointer; background: none; border: none; padding: 0; display: block; }
.ai-excel-code {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; font-size: .78rem; font-family: var(--mono, monospace);
  overflow-x: auto; white-space: pre; margin-bottom: 10px; color: var(--text-soft);
}
.ai-excel-code.hidden { display: none; }
.ai-excel-table { font-size: .85rem; color: var(--text-soft); overflow-x: auto; }
.ai-excel-table pre { font-family: var(--mono, monospace); font-size: .78rem; white-space: pre; }

/* Vision tool ("Analisi visiva") block */
.ai-vision-block { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }
.ai-vision-head { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin-bottom: 8px; }
.ai-vision-block.ai-vision-error { color: var(--text-soft); border-top-color: var(--border); font-size: .85rem; }
.ai-vision-thumb {
  display: block; max-width: 220px; max-height: 220px; border-radius: 8px;
  border: 1px solid var(--border); margin-bottom: 10px; object-fit: contain;
  background: var(--surface-2);
}
.ai-vision-answer { font-size: .85rem; color: var(--text-soft); }

/* Document generation tool ("Documento generato") block */
.ai-document-block {
  margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.ai-document-head { font-size: .85rem; color: var(--text-soft); }
.ai-document-block.ai-document-error { color: var(--text-soft); font-size: .85rem; }
.ai-document-download-btn {
  background: var(--accent-soft); border: 1px solid var(--border-strong); color: var(--text);
  border-radius: 999px; padding: 5px 12px; font-size: .78rem; transition: all var(--t);
}
.ai-document-download-btn:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-1px); }
.ai-document-download-btn:disabled { opacity: .7; cursor: default; }

/* Ad-hoc chat attachment block (image/excel/text file attached directly to
   a message, analyzed inline, not indexed unless explicitly saved) */
.ai-attachment-block {
  margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.ai-attachment-head {
  font-size: .78rem; color: var(--text-soft); display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.ai-attachment-tag {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-faint);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 2px 8px;
}
.ai-attachment-save-btn {
  background: var(--accent-soft); border: 1px solid var(--border-strong); color: var(--text);
  border-radius: 999px; padding: 5px 12px; font-size: .78rem; transition: all var(--t);
}
.ai-attachment-save-btn:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-1px); }
.ai-attachment-save-btn:disabled { opacity: .7; cursor: default; }

/* Vision thumbnails in the document preview (context) panel — additive,
   shown alongside OCR text, never in place of it. */
.ctx-vision-thumbs { display: flex; flex-wrap: wrap; gap: 10px; margin: 4px 0 18px; }
.ctx-vision-thumb { width: 96px; text-align: center; }
.ctx-vision-thumb-label { font-size: .68rem; color: var(--text-faint); margin-bottom: 4px; }
.ctx-vision-img {
  width: 96px; height: 96px; object-fit: cover; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface-2); cursor: pointer;
}

/* Vision tool ("Analisi visiva") block */
.ai-vision-block { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }
.ai-vision-head { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin-bottom: 8px; }
.ai-vision-block.ai-vision-error { color: var(--text-soft); border-top-color: var(--border); font-size: .85rem; }
.ai-vision-thumb {
  display: block; max-width: 220px; max-height: 220px; border-radius: 8px;
  border: 1px solid var(--border); margin-bottom: 10px; object-fit: contain;
  background: var(--surface-2);
}
.ai-vision-answer { font-size: .85rem; color: var(--text-soft); }

/* Vision thumbnails in the document preview (context panel) */
.ctx-vision-thumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.ctx-vision-thumb { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.ctx-vision-thumb-label { font-size: .68rem; color: var(--text-faint); }
.ctx-vision-img {
  width: 96px; height: 96px; object-fit: cover; border-radius: 6px;
  border: 1px solid var(--border); background: var(--surface-2);
}

/* actions row */
.ai-actions {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  padding: 10px 16px; border-top: 1px solid var(--border);
  background: rgba(0,0,0,.04);
  opacity: .55; transition: opacity var(--t);
}
.ai-block:hover .ai-actions { opacity: 1; }
.act-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: transparent; border: 1px solid transparent;
  color: var(--text-muted); border-radius: 8px; padding: 5px 10px;
  font-size: .78rem; transition: all var(--t);
}
.act-btn:hover { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.act-btn.saved { color: var(--success); }

/* follow-up suggestions */
.followups { display: flex; flex-wrap: wrap; gap: 7px; margin-left: auto; }
.followup {
  background: var(--accent-soft); border: 1px solid var(--border-strong);
  color: var(--text-soft); border-radius: 999px; padding: 5px 12px; font-size: .76rem;
  transition: all var(--t);
}
.followup:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }

/* skeleton / thinking */
.ai-block.thinking .ai-body { padding: 16px; }
.thinking-line { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: .86rem; margin-bottom: 14px; }
.orbit {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  border: 3px solid var(--surface-3); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.skeleton { height: 17px; border-radius: 6px; margin-bottom: 9px;
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 50%, var(--surface-2) 75%);
  background-size: 200% 100%; animation: shimmer 1.3s infinite; }
.skeleton.w-90 { width: 90%; } .skeleton.w-75 { width: 75%; } .skeleton.w-60 { width: 60%; } .skeleton.w-40 { width: 40%; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* error block */
.error-block {
  background: var(--error-soft); border: 1px solid rgba(255,107,107,.3);
  border-radius: var(--radius); padding: 14px 16px; color: var(--error); font-size: .88rem;
}

/* ============================================================================
   Input dock — command palette bar
   ========================================================================== */
.input-dock { padding: 12px clamp(18px, 8vw, 120px) 20px; flex-shrink: 0; }
.input-dock.centered {
  padding: 0; width: 100%; max-width: 1440px; margin: 0 auto; flex-shrink: 0;
}
.input-shell {
  border-radius: var(--radius-lg); padding: 8px;
  box-shadow: var(--shadow-2);
  transition: border-color var(--t), box-shadow var(--t);
}
.input-shell:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-2); }

.live-suggestions {
  display: flex; flex-direction: column; gap: 2px;
  padding: 6px; margin-bottom: 4px;
  border-bottom: 1px solid var(--border);
  animation: fade-in 160ms var(--ease);
}
.live-sug {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 10px; border-radius: 8px; font-size: .84rem;
  color: var(--text-soft); cursor: pointer; transition: background var(--t);
}
.live-sug:hover, .live-sug.active { background: var(--surface-2); color: var(--text); }
.live-sug .ls-ico { color: var(--text-faint); }
.live-sug .ls-tag { margin-left: auto; font-size: .68rem; color: var(--text-faint); }

.input-dock.drag-over .input-shell {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-2);
}

.attach-preview {
  display: flex; align-items: center; gap: 10px;
  margin: 4px 6px 8px; padding: 8px 10px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px;
}
.attach-thumb {
  width: 34px; height: 34px; border-radius: 8px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  background: var(--surface-3); overflow: hidden;
}
.attach-thumb img { width: 100%; height: 100%; object-fit: cover; }
.attach-meta { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.attach-name { font-size: .82rem; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.attach-size { font-size: .7rem; color: var(--text-faint); }
.attach-remove {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
  background: transparent; border: 1px solid var(--border); color: var(--text-muted);
  font-size: 1rem; line-height: 1; transition: all var(--t);
}
.attach-remove:hover { background: var(--error-soft); border-color: rgba(255,107,107,.4); color: var(--error); }

.attach-trigger {
  width: 38px; height: 38px; flex-shrink: 0; border: none; border-radius: 12px;
  background: transparent; color: var(--text-muted);
  display: inline-flex; align-items: center; justify-content: center;
  transition: all var(--t); margin-bottom: 2px;
}
.attach-trigger:hover { background: var(--surface-2); color: var(--text); }

.input-main { display: flex; align-items: flex-end; gap: 10px; padding: 4px 6px 4px 10px; }
#chat-input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text); font-size: 1rem; line-height: 1.55;
  resize: none; min-height: calc(1.55em + 16px); max-height: 200px; overflow-y: auto; padding: 8px 0;
}
#chat-input::placeholder { color: var(--text-faint); }
.send-btn {
  width: 57px; height: 57px; flex-shrink: 0; border: none; border-radius: 17px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -8px var(--accent-glow);
  transition: transform var(--t), filter var(--t), opacity var(--t), background var(--t), box-shadow var(--t);
}
.send-btn:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.08); }
.send-btn:disabled { opacity: .4; cursor: not-allowed; }
/* stop mode */
.send-btn .icon-stop { display: none; }
.send-btn.stop-mode {
  background: linear-gradient(135deg, #e11d48, #f43f5e);
  box-shadow: 0 8px 20px -8px rgba(225,29,72,.5);
  animation: stop-pulse 1.4s ease-in-out infinite;
}
.send-btn.stop-mode .icon-send { display: none; }
.send-btn.stop-mode .icon-stop { display: inline-flex; }
@keyframes stop-pulse {
  0%, 100% { box-shadow: 0 8px 20px -8px rgba(225,29,72,.4); }
  50%       { box-shadow: 0 8px 30px -4px rgba(225,29,72,.75); }
}

.input-foot { display: flex; justify-content: space-between; padding: 4px 12px 2px; }
.input-hint { font-size: .72rem; color: var(--text-muted); }
.input-hint.dim { color: var(--text-faint); }

/* ============================================================================
   Right — context panel
   ========================================================================== */
.context-panel {
  width: var(--ctx-w); min-width: var(--ctx-w);
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: margin-right var(--t), opacity var(--t);
}
.context-panel.collapsed { margin-right: calc(-1 * var(--ctx-w)); opacity: 0; pointer-events: none; }

.ctx-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 16px 12px; border-bottom: 1px solid var(--border);
}
.ctx-head h3 { font-size: .82rem; font-weight: 700; letter-spacing: .03em; }
.ctx-body { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 14px; }
.ctx-empty { margin: auto; text-align: center; color: var(--text-faint); padding: 30px 10px; }
.ctx-empty-mark { font-size: 1.8rem; display: block; margin-bottom: 10px; opacity: .6; }
.ctx-empty p { font-size: .82rem; line-height: 1.55; }

.ctx-stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ctx-stat {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 11px 12px;
}
.ctx-stat .cs-val { font-size: 1.3rem; font-weight: 700; }
.ctx-stat .cs-label { font-size: .7rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: .06em; }
.ctx-stat .cs-val.accent { color: var(--accent); }
.ctx-stat .cs-val.good { color: var(--success); }

.ctx-section-title { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin: 4px 0 2px; }

.ctx-doc {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 11px; animation: fade-in 220ms var(--ease);
}
.ctx-doc-head { display: flex; align-items: center; gap: 8px; margin-bottom: 7px; }
.ctx-doc-name { font-size: .82rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.ctx-doc-page { font-size: .68rem; color: var(--text-faint); flex-shrink: 0; }
.ctx-score-row { display: flex; align-items: center; gap: 8px; }
.ctx-score-bar { flex: 1; height: 8px; border-radius: 4px; background: var(--surface-3); overflow: hidden; }
.ctx-score-fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.ctx-score-num { font-size: .72rem; color: var(--accent); font-weight: 600; flex-shrink: 0; min-width: 34px; text-align: right; }
.ctx-chunk-text {
  margin-top: 8px; font-size: .77rem; line-height: 1.5; color: var(--text-muted);
  max-height: 0; overflow: hidden; transition: max-height var(--t);
}
.ctx-doc.open .ctx-chunk-text { max-height: 320px; overflow-y: auto; }
.ctx-raw-toggle { font-size: .7rem; color: var(--accent); margin-top: 6px; cursor: pointer; background: none; border: none; padding: 0; }

.ctx-foot { padding: 12px 16px; border-top: 1px solid var(--border); }
.switch-row { display: flex; align-items: center; justify-content: space-between; font-size: .82rem; color: var(--text-soft); }
.switch { position: relative; width: 57px; height: 32px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; inset: 0; border-radius: 999px; background: var(--surface-3);
  transition: background var(--t); cursor: pointer;
}
.slider::before {
  content: ""; position: absolute; height: 22px; width: 22px; left: 5px; top: 5px;
  border-radius: 50%; background: #fff; transition: transform var(--t);
}
.switch input:checked + .slider { background: var(--accent); }
.switch input:checked + .slider::before { transform: translateX(25px); }

/* ============================================================================
   Command palette & modal
   ========================================================================== */
.palette-overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(180,180,200,.45); backdrop-filter: blur(4px);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 14vh; animation: fade-in 140ms var(--ease);
}
.palette {
  width: min(620px, 92vw); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-pop); overflow: hidden; animation: pop-in 180ms var(--ease);
}
.palette-input-row { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.palette-ico { color: var(--accent); font-size: 1rem; }
#palette-input { flex: 1; background: transparent; border: none; outline: none; color: var(--text); font-size: 1rem; }
.palette-results { max-height: 52vh; overflow-y: auto; padding: 8px; }
.palette-group-title { font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); padding: 8px 10px 4px; }
.palette-item {
  display: flex; align-items: center; gap: 11px; padding: 10px 12px;
  border-radius: 9px; cursor: pointer; font-size: .88rem; color: var(--text-soft);
  transition: background var(--t);
}
.palette-item:hover, .palette-item.active { background: var(--surface-2); color: var(--text); }
.palette-item .pi-ico { color: var(--text-faint); width: 18px; text-align: center; }
.palette-item .pi-sub { margin-left: auto; font-size: .72rem; color: var(--text-faint); }

.modal { width: min(440px, 92vw); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-pop); animation: pop-in 180ms var(--ease); }
.modal h3 { font-size: 1.1rem; margin-bottom: 6px; }
.modal-desc { color: var(--text-muted); font-size: .85rem; margin-bottom: 16px; }
.modal-body input, .modal-body select {
  width: 100%; background: var(--surface-1); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); padding: 11px 13px; color: var(--text); font-size: .9rem; outline: none;
  margin-bottom: 10px;
}
.modal-body input:focus, .modal-body select:focus { border-color: var(--accent); }
.modal-body .checks { display: flex; flex-direction: column; gap: 6px; max-height: 260px; overflow-y: auto; }
.modal-body .check-row { display: flex; align-items: center; gap: 9px; padding: 7px 9px; border-radius: 8px; font-size: .85rem; transition: background var(--t); }
.modal-body .check-row:hover { background: var(--surface-1); }
.modal-body .check-row input { width: auto; margin: 0; accent-color: var(--accent); }
.modal-actions { display: flex; gap: 10px; margin-top: 8px; }
.modal-actions .btn-primary, .modal-actions .btn-ghost { width: auto; flex: 1; margin: 0; }

/* toast */
.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(10px);
  background: var(--glass-strong); backdrop-filter: blur(16px);
  border: 1px solid var(--border-strong); color: var(--text);
  padding: 11px 18px; border-radius: 12px; font-size: .85rem; z-index: 60;
  box-shadow: var(--shadow-pop); opacity: 0; transition: opacity var(--t), transform var(--t);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border-color: rgba(68,214,160,.4); }
.toast.error { border-color: rgba(255,107,107,.4); }

/* ============================================================================
   Focus mode
   ========================================================================== */
#main-view.focus .sidebar,
#main-view.focus .context-panel { margin-left: 0; }
#main-view.focus .sidebar { margin-left: calc(-1 * var(--sidebar-w)); opacity: 0; pointer-events: none; }
#main-view.focus .context-panel { margin-right: calc(-1 * var(--ctx-w)); opacity: 0; pointer-events: none; }
#main-view.focus .messages { padding-left: clamp(40px, 16vw, 240px); padding-right: clamp(40px, 16vw, 240px); }

/* ============================================================================
   Animations
   ========================================================================== */
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes rise-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pop-in { from { opacity: 0; transform: scale(.96); } to { opacity: 1; transform: scale(1); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* responsive */
@media (max-width: 1100px) { .context-panel { position: absolute; right: 0; top: 0; bottom: 0; z-index: 20; box-shadow: var(--shadow-pop); } }
@media (max-width: 760px) {
  .sidebar { position: absolute; left: 0; top: 0; bottom: 0; z-index: 30; box-shadow: var(--shadow-pop); }
  .input-dock.centered { max-width: 100%; }
  .messages { padding-left: 16px; padding-right: 16px; }
}