:root {
  --ai-panel: 286px;
  --ai-context: 280px;
}

body.ai-workspace-page:not(.ai-workspace-ready) .ai-workspace {
  opacity: 0;
  transform: translateY(10px);
}
body.ai-workspace-page.ai-workspace-ready .ai-workspace {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.34s ease, transform 0.44s cubic-bezier(0.16, 1, 0.3, 1);
}
@media (prefers-reduced-motion: reduce) {
  body.ai-workspace-page:not(.ai-workspace-ready) .ai-workspace,
  body.ai-workspace-page.ai-workspace-ready .ai-workspace { opacity: 1; transform: none; transition: none; }
}

html,
body.ai-workspace-page {
  width: 100%;
  min-height: 100%;
  overflow: hidden;
  background: var(--bg-base);
}

.ai-workspace-page .mobile-menu-btn,
.ai-workspace-page .sidebar-overlay { display: none !important; }

.ai-workspace {
  display: grid;
  grid-template-columns: var(--ai-panel) minmax(0, 1fr) var(--ai-context);
  width: 100%;
  height: 100dvh;
  min-height: 0;
  color: var(--text-primary);
  background: var(--bg-base);
}

.ai-conversation-panel,
.ai-context-panel {
  min-width: 0;
  background: var(--bg-sidebar);
}

.ai-conversation-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 20px 14px max(16px, env(safe-area-inset-bottom));
  border-right: 1px solid var(--border-color);
}

.ai-panel-brand,
.ai-chat-topbar,
.ai-topbar-start,
.ai-topbar-actions,
.ai-composer-row {
  display: flex;
  align-items: center;
}

.ai-panel-brand { justify-content: space-between; padding: 0 4px 18px; }
.ai-brand-link { display: inline-flex; align-items: center; gap: 10px; color: var(--text-primary); font-family: var(--font-serif); font-size: 18px; font-weight: 700; text-decoration: none; }
.ai-brand-link [data-pixel] { width: 26px; height: 26px; color: var(--color-primary); }
.ai-mobile-panel-close { display: none; }

.ai-new-chat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  color: var(--text-primary);
  background: var(--bg-surface);
  font-weight: 650;
  cursor: pointer;
  transition: transform var(--transition-premium), border-color var(--transition);
}
.ai-new-chat:hover { border-color: var(--color-primary); }
.ai-new-chat:active { transform: scale(0.98); }

.ai-conversation-label,
.ai-context-kicker {
  color: var(--text-tertiary);
  font: 700 10px/1.4 var(--font-mono);
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.ai-conversation-label { padding: 22px 10px 8px; }
.ai-conversation-list { flex: 1 1 auto; min-height: 0; overflow-y: auto; display: grid; align-content: start; gap: 3px; }
.ai-conversation-item { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 36px; align-items: center; min-height: 48px; border-radius: 9px; }
.ai-conversation-item.active { background: var(--color-primary-light); }
.ai-conversation-select { min-width: 0; width: 100%; padding: 10px 10px; border: 0; color: var(--text-secondary); background: transparent; text-align: left; cursor: pointer; }
.ai-conversation-select strong { display: block; overflow: hidden; color: inherit; font-size: 13px; font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.ai-conversation-select small { display: block; margin-top: 3px; color: var(--text-tertiary); font-size: 10px; }
.ai-conversation-item.active .ai-conversation-select { color: var(--text-primary); }
.ai-conversation-menu { width: 36px; height: 36px; border: 0; border-radius: 8px; color: var(--text-tertiary); background: transparent; cursor: pointer; opacity: 0; }
.ai-conversation-item:hover .ai-conversation-menu,
.ai-conversation-menu:focus-visible { opacity: 1; }
.ai-panel-state { padding: 20px 10px; color: var(--text-tertiary); font-size: 12px; line-height: 1.7; }

.ai-panel-footer { display: grid; gap: 3px; padding-top: 12px; border-top: 1px solid var(--border-light); }
.ai-panel-footer a,
.ai-panel-footer button { display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 10px; border: 0; border-radius: 8px; color: var(--text-secondary); background: transparent; font-size: 13px; text-decoration: none; cursor: pointer; }
.ai-panel-footer a:hover,
.ai-panel-footer button:hover { color: var(--text-primary); background: var(--bg-muted); }

.ai-chat-stage { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; min-width: 0; min-height: 0; background: var(--bg-surface); }
.ai-chat-topbar { justify-content: space-between; min-height: 70px; padding: max(12px, env(safe-area-inset-top)) 24px 12px; border-bottom: 1px solid var(--border-light); background: color-mix(in srgb, var(--bg-surface) 92%, transparent); }
.ai-topbar-start { min-width: 0; gap: 12px; }
.ai-topbar-start h1 { overflow: hidden; max-width: min(52vw, 560px); margin: 0; font-size: 15px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
.ai-topbar-start p { margin: 3px 0 0; color: var(--text-tertiary); font-size: 11px; }
.ai-topbar-actions { gap: 6px; }
.ai-icon-button { display: grid; place-items: center; width: 44px; height: 44px; border: 0; border-radius: 10px; color: var(--text-secondary); background: transparent; cursor: pointer; }
.ai-icon-button:hover { color: var(--text-primary); background: var(--bg-muted); }
.ai-danger-button:hover { color: #b42318; background: rgba(180, 35, 24, 0.08); }
.ai-panel-toggle { display: none; }

.ai-message-viewport { min-height: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-gutter: stable; }
.ai-message-stream { width: min(100% - 32px, 820px); min-height: 100%; margin: 0 auto; padding: 30px 0 22px; }
.ai-load-older { display: block; min-height: 40px; margin: 14px auto 0; padding: 0 15px; border: 1px solid var(--border-color); border-radius: 999px; color: var(--text-secondary); background: var(--bg-surface); cursor: pointer; }
.ai-load-older[hidden] { display: none; }

.ai-empty-state { min-height: calc(100dvh - 270px); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.ai-empty-mark { width: 50px; height: 50px; margin-bottom: 18px; color: var(--color-primary); }
.ai-empty-kicker { margin: 0 0 9px; color: var(--color-primary); font: 700 10px/1.4 var(--font-mono); letter-spacing: 0.12em; }
.ai-empty-state h2 { margin: 0; font-family: var(--font-serif); font-size: clamp(24px, 4vw, 34px); font-weight: 600; letter-spacing: -0.025em; }
.ai-empty-state > p:not(.ai-empty-kicker) { max-width: 560px; margin: 12px auto 0; color: var(--text-secondary); font-size: 14px; line-height: 1.8; }
.ai-starter-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; width: min(100%, 590px); margin-top: 26px; }
.ai-starter-grid button { min-height: 48px; padding: 11px 14px; border: 1px solid var(--border-color); border-radius: 11px; color: var(--text-secondary); background: var(--bg-base); text-align: left; cursor: pointer; transition: transform var(--transition-premium), border-color var(--transition), color var(--transition); }
.ai-starter-grid button:hover { border-color: var(--color-primary); color: var(--text-primary); }
.ai-starter-grid button:active { transform: scale(0.985); }

.ai-message { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 13px; padding: 18px 0; border-top: 1px solid var(--border-light); }
.ai-message:first-child { border-top: 0; }
.ai-message-avatar { display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--border-color); border-radius: 9px; color: var(--text-secondary); background: var(--bg-base); }
.ai-message-assistant .ai-message-avatar { color: var(--color-primary); background: var(--color-primary-light); }
.ai-message-body { min-width: 0; color: var(--text-primary); font-size: 14px; line-height: 1.78; overflow-wrap: anywhere; }
.ai-message-user .ai-message-body { font-weight: 520; }
.ai-message-body pre { overflow-x: auto; margin: 12px 0; padding: 14px; border-radius: 10px; color: #e7e7ea; background: #202124; font: 12px/1.6 var(--font-mono); }
.ai-message-body code { padding: 2px 5px; border-radius: 4px; background: var(--bg-muted); font-family: var(--font-mono); font-size: 0.9em; }
.ai-message-body pre code { padding: 0; background: transparent; }
.ai-message-body a { color: var(--color-primary); }
.ai-message-meta { margin-top: 8px; color: var(--text-tertiary); font-size: 10px; }
.ai-message-sources { display: grid; gap: 7px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border-light); }
.ai-message-sources a { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 38px; padding: 8px 10px; border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-secondary); font-size: 12px; text-decoration: none; }
.ai-message-sources a:hover { border-color: var(--color-primary); color: var(--text-primary); }
.ai-stream-cursor::after { content: ""; display: inline-block; width: 7px; height: 15px; margin-left: 3px; background: var(--color-primary); vertical-align: -2px; animation: aiCursor 1s steps(1) infinite; }
@keyframes aiCursor { 50% { opacity: 0; } }

.ai-composer-shell { padding: 10px 24px max(12px, env(safe-area-inset-bottom)); background: var(--bg-surface); }
.ai-composer { width: min(100%, 820px); margin: 0 auto; padding: 11px 12px 9px 16px; border: 1px solid var(--border-strong); border-radius: 16px; background: var(--bg-base); transition: border-color var(--transition), box-shadow var(--transition); }
.ai-composer:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light); }
.ai-composer textarea { display: block; width: 100%; max-height: 160px; resize: none; border: 0; outline: 0; color: var(--text-primary); background: transparent; font: 16px/1.55 var(--font-sans); }
.ai-composer textarea::placeholder { color: var(--text-tertiary); }
.ai-composer-row { justify-content: space-between; gap: 12px; margin-top: 8px; }
.ai-composer-row span { color: var(--text-tertiary); font-size: 10px; }
.ai-composer-row button { display: grid; place-items: center; width: 44px; height: 44px; flex: 0 0 44px; border: 0; border-radius: 11px; color: #fff; background: var(--color-primary); cursor: pointer; }
.ai-composer-row button:disabled { opacity: 0.45; cursor: not-allowed; }
.ai-disclaimer { margin: 8px auto 0; color: var(--text-tertiary); font-size: 10px; text-align: center; }

.ai-context-panel { display: flex; flex-direction: column; gap: 0; padding: max(28px, env(safe-area-inset-top)) 22px 24px; border-left: 1px solid var(--border-color); overflow-y: auto; }
.ai-context-block { padding: 0 0 24px; }
.ai-context-block + .ai-context-block { padding-top: 22px; border-top: 1px solid var(--border-light); }
.ai-context-block h2 { margin: 9px 0 10px; font-family: var(--font-serif); font-size: 20px; font-weight: 600; }
.ai-context-block p { margin: 8px 0 0; color: var(--text-secondary); font-size: 12px; line-height: 1.75; }
.ai-context-links { display: grid; gap: 0; margin-top: auto; border-top: 1px solid var(--border-light); }
.ai-context-links a { display: flex; justify-content: space-between; gap: 10px; padding: 13px 0; border-bottom: 1px solid var(--border-light); color: var(--text-secondary); font-size: 12px; text-decoration: none; }
.ai-context-links a:hover { color: var(--color-primary); }
.ai-panel-backdrop { position: fixed; inset: 0; z-index: 80; background: rgba(12, 14, 13, 0.42); backdrop-filter: blur(3px); }

.ai-icon-button:focus-visible,
.ai-new-chat:focus-visible,
.ai-conversation-select:focus-visible,
.ai-conversation-menu:focus-visible,
.ai-panel-footer a:focus-visible,
.ai-panel-footer button:focus-visible,
.ai-load-older:focus-visible,
.ai-starter-grid button:focus-visible,
.ai-composer-row button:focus-visible,
.ai-message-sources a:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }

@media (max-width: 1120px) {
  .ai-workspace { grid-template-columns: var(--ai-panel) minmax(0, 1fr); }
  .ai-context-panel { display: none; }
}

@media (max-width: 760px) {
  .ai-workspace { display: block; }
  .ai-chat-stage { height: 100dvh; }
  .ai-conversation-panel { position: fixed; inset: 0 auto 0 0; z-index: 90; width: min(88vw, 320px); transform: translateX(-102%); transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1); box-shadow: 18px 0 50px rgba(0, 0, 0, 0.18); }
  .ai-workspace.panel-open .ai-conversation-panel { transform: translateX(0); }
  .ai-mobile-panel-close,
  .ai-panel-toggle { display: grid; }
  .ai-chat-topbar { min-height: 62px; padding-inline: 12px; }
  .ai-topbar-actions { gap: 0; }
  .ai-message-stream { width: min(100% - 24px, 820px); padding-top: 16px; }
  .ai-empty-state { min-height: calc(100dvh - 250px); }
  .ai-starter-grid { grid-template-columns: 1fr; }
  .ai-message { grid-template-columns: 30px minmax(0, 1fr); gap: 10px; padding-block: 15px; }
  .ai-message-avatar { width: 30px; height: 30px; }
  .ai-composer-shell { padding-inline: 10px; }
  .ai-composer-row span { max-width: 72%; }
}

@media (max-width: 390px) {
  .ai-topbar-start h1 { max-width: 44vw; }
  .ai-topbar-start p { display: none; }
  .ai-topbar-actions .ai-icon-button { width: 44px; height: 44px; flex: 0 0 44px; }
  .ai-empty-state h2 { font-size: 24px; }
  .ai-empty-state > p:not(.ai-empty-kicker) { font-size: 13px; }
  .ai-message-stream { width: calc(100% - 20px); }
  .ai-composer { border-radius: 14px; }
}

@media (max-height: 620px) and (orientation: landscape) {
  .ai-chat-topbar { min-height: 52px; }
  .ai-topbar-start p,
  .ai-disclaimer { display: none; }
  .ai-message-stream { padding-top: 12px; }
  .ai-empty-state { min-height: 240px; padding-block: 20px; }
  .ai-starter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 14px; }
  .ai-composer-shell { padding-block: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  .ai-conversation-panel,
  .ai-new-chat,
  .ai-starter-grid button { transition: none !important; }
  .ai-stream-cursor::after { animation: none; }
}