/* ═══════════════════════════════════════════════
   Mobile Friendliness — Complete mobile overhaul
   Touch targets, layout, scrolling, readability
   ═══════════════════════════════════════════════ */

/* Touch-friendly sizing for all interactive elements */
@media (hover: none) and (pointer: coarse) {
  .footer-btn, .msg-action-btn, .hint, .continue-btn,
  #new-chat-btn, #menu-btn, #mic-btn, #attach-btn, #send-btn,
  .chat-delete, .file-remove, .copy-btn, .pin-icon,
  .settings-btn, #mem-search-btn {
    min-height: 44px !important;
    min-width: 44px !important;
  }
}

@media (max-width: 768px) {
  /* ── Override existing responsive ── */
  :root {
    --sidebar-w: 85vw;
    --topbar-h: 56px;
  }

  /* ── Sidebar ── */
  #sidebar {
    width: var(--sidebar-w);
    box-shadow: 0 0 30px rgba(0,0,0,.4);
  }

  .sidebar-header {
    padding: 12px 14px !important;
  }
  .logo { font-size: 16px !important; }
  .logo svg { width: 24px !important; height: 24px !important; }
  #new-chat-btn { width: 40px !important; height: 40px !important; }

  /* Larger touch targets in chat list */
  .chat-item {
    padding: 14px 12px !important;
    font-size: 14px !important;
    margin-bottom: 4px !important;
  }
  .chat-item .chat-delete {
    padding: 8px !important;
    opacity: 0.6 !important;
  }
  .chat-item .pin-icon {
    width: 18px !important;
    height: 18px !important;
    opacity: 0.6 !important;
  }

  /* ── Footer row ── */
  .footer-row {
    gap: 2px !important;
  }
  .footer-btn.small {
    font-size: 10px !important;
    padding: 10px 4px !important;
    border-radius: 8px !important;
  }

  .model-badge {
    font-size: 10px !important;
    padding: 8px 6px !important;
  }

  /* ── Topbar ── */
  #topbar {
    height: var(--topbar-h) !important;
    padding: 0 12px !important;
  }
  #menu-btn { padding: 8px !important; }
  .topbar-title { font-size: 15px !important; }
  #theme-toggle-mobile, #activity-toggle, #split-toggle {
    width: 40px !important;
    height: 40px !important;
    padding: 8px !important;
  }

  /* ── Messages ── */
  #messages {
    padding: 12px 12px 0 !important;
  }

  .msg {
    gap: 8px !important;
    margin-bottom: 16px !important;
  }

  .msg-avatar {
    width: 28px !important;
    height: 28px !important;
    font-size: 12px !important;
    margin-top: 2px !important;
  }

  .msg-bubble {
    max-width: 92% !important;
    font-size: 15px !important;
    padding: 10px 14px !important;
    line-height: 1.6 !important;
  }

  /* Larger message action buttons */
  .msg-actions {
    opacity: 1 !important;
    gap: 10px !important;
    margin-top: 10px !important;
    padding-top: 8px !important;
  }
  .msg-action-btn {
    font-size: 12px !important;
    padding: 6px 12px !important;
    border-radius: 8px !important;
  }
  .msg-action-btn svg {
    width: 16px !important;
    height: 16px !important;
  }

  /* ── Welcome screen ── */
  #welcome-screen {
    padding: 24px 16px !important;
  }
  .welcome-logo { margin-bottom: 16px !important; }
  .welcome-logo svg { width: 48px !important; height: 48px !important; }
  #welcome-screen h1 {
    font-size: 20px !important;
  }
  .welcome-sub { font-size: 13px !important; margin-bottom: 24px !important; }
  .hint {
    font-size: 14px !important;
    padding: 12px 20px !important;
    border-radius: 24px !important;
    width: 100% !important;
  }

  /* ── Input area ── */
  #input-area {
    padding: 10px 12px 16px !important;
    gap: 6px !important;
  #input-area { padding: 10px 12px 16px !important; gap: 6px !important; }
  #input-box {
    font-size: 15px !important;
    padding: 12px 14px !important;
    border-radius: 22px !important;
    min-height: 44px !important;
  }
  #attach-btn, #mic-btn {
    width: 44px !important;
    height: 44px !important;
    flex-shrink: 0 !important;
  }
  #send-btn {
    width: 48px !important;
    height: 48px !important;
  }
  #send-btn svg, #attach-btn svg, #mic-btn svg {
    width: 22px !important;
    height: 22px !important;
  }

  /* ── File bar ── */
  #file-bar {
    padding: 0 12px !important;
    gap: 4px !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scroll-snap-type: x mandatory !important;
  }
  .file-chip {
    flex-shrink: 0 !important;
    scroll-snap-align: start !important;
    font-size: 13px !important;
    padding: 6px 10px 6px 8px !important;
    max-width: 160px !important;
  }
  .file-chip .file-icon {
    width: 20px !important;
    height: 20px !important;
    font-size: 12px !important;
  }
  .file-chip .file-remove {
    padding: 4px !important;
  }
  .file-chip .file-remove svg {
    width: 14px !important;
    height: 14px !important;
  }

  /* ── Recording bar ── */
  .recording-bar {
    margin: 0 12px !important;
    padding: 10px 14px !important;
    font-size: 14px !important;
  }
  .recording-bar .rb-stop {
    padding: 6px !important;
  }

  /* ── Activity panel ── */
  #activity-panel {
    width: 100% !important;
    top: var(--topbar-h) !important;
  }
  .ap-entry {
    padding: 12px 14px !important;
  }
  .ap-entry .entry-title {
    font-size: 14px !important;
  }
  .ap-entry .entry-detail {
    font-size: 13px !important;
  }

  /* ── Settings modal ── */
  .settings-panel {
    width: 95% !important;
    max-height: 90vh !important;
  }
  .setting-row {
    padding: 14px 0 !important;
  }
  .setting-row label {
    font-size: 14px !important;
    margin-bottom: 8px !important;
  }
  .setting-row input[type="text"],
  .setting-row input[type="number"],
  .setting-row select {
    font-size: 15px !important;
    padding: 10px 14px !important;
    border-radius: 10px !important;
  }
  .range-wrap input[type="range"] {
    height: 8px !important;
  }
  .range-wrap input[type="range"]::-webkit-slider-thumb {
    width: 24px !important;
    height: 24px !important;
  }
  .setting-hint {
    font-size: 12px !important;
  }

  /* ── Memory modal ── */
  .mem-panel {
    width: 95% !important;
  }
  .mem-search {
    padding: 10px 14px !important;
  }
  #mem-input {
    font-size: 15px !important;
    padding: 10px 14px !important;
  }
  #mem-search-btn {
    padding: 10px 18px !important;
    font-size: 14px !important;
  }
  .mem-item {
    padding: 12px 0 !important;
  }
  .mem-item .mem-text {
    font-size: 14px !important;
  }

  /* ── Split panel ── */
  #main.split {
    grid-template-columns: 1fr !important;
    grid-template-rows: 1fr 1fr !important;
  }
  .sp-header {
    padding: 10px 12px !important;
    font-size: 13px !important;
  }
  .sp-header select {
    font-size: 13px !important;
    padding: 6px 8px !important;
  }
  .split-msgs {
    padding: 10px !important;
  }
  .split-msgs .msg-bubble {
    font-size: 14px !important;
  }

  /* ── Code blocks ── */
  .code-block-wrap pre code {
    font-size: 12px !important;
    padding: 10px !important;
  }
  .copy-btn {
    opacity: 1 !important;
    font-size: 12px !important;
    padding: 6px 10px !important;
  }
  .code-lang {
    font-size: 10px !important;
    padding: 3px 10px !important;
  }

  /* ── Tables ── */
  .msg-bubble table {
    font-size: 12px !important;
    display: block !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }

  /* ── Image viewer ── */
  #image-viewer img {
    max-width: 95vw !important;
    max-height: 80vh !important;
  }
  #image-viewer .iv-nav {
    width: 40px !important;
    height: 40px !important;
    font-size: 20px !important;
  }

  /* ── Shortcuts modal ── */
  .shortcuts-panel {
    width: 95% !important;
    padding: 16px !important;
  }
  .shortcut-row {
    font-size: 14px !important;
    padding: 10px 0 !important;
  }
  .shortcut-row kbd {
    font-size: 12px !important;
    padding: 3px 8px !important;
  }

  /* ── Mermaid ── */
  .mermaid-wrap {
    padding: 8px !important;
  }

  /* ── Scrollbar hide but functional ── */
  ::-webkit-scrollbar {
    width: 3px !important;
  }

  /* ── Prevent zoom on input focus ── */
  input, textarea, select {
    font-size: 16px !important;
  }
}

/* Extra small screens */
@media (max-width: 380px) {
  :root { --sidebar-w: 92vw; }
  .footer-btn.small { font-size: 9px !important; padding: 8px 3px !important; }
  .footer-row { gap: 1px !important; }
  .msg-bubble { font-size: 14px !important; }
  .hint { font-size: 13px !important; }
}

/* Landscape mobile */
@media (max-height: 500px) and (orientation: landscape) {
  #topbar { height: 44px !important; }
  .sidebar-header { padding: 8px 12px !important; }
  #input-area { padding: 6px 12px 10px !important; }
  #messages { padding: 8px 12px 0 !important; }
  .msg { margin-bottom: 10px !important; }
}