/* =====================================================
   style.css — Aura v15  |  Modern Mobile-First UI
===================================================== */
@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600&family=Geist+Mono:wght@400;500&display=swap');

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

:root {
  --bg:            #f6f5f3;
  --surface:       #ffffff;
  --surface-2:     #f0ede8;
  --border:        #e4e1db;
  --border-soft:   #ece9e3;
  --text-primary:  #18181b;
  --text-secondary:#52525b;
  --text-muted:    #a1a1aa;
  --accent:        #18181b;
  --accent-2:      #3f3f46;
  --accent-soft:   #f4f4f5;
  --user-bg:       #18181b;
  --user-text:     #fafafa;
  --danger:        #dc2626;
  --danger-soft:   #fef2f2;
  --shadow-sm:     0 1px 2px rgba(0,0,0,0.04), 0 1px 6px rgba(0,0,0,0.04);
  --shadow-md:     0 4px 16px rgba(0,0,0,0.07), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-lg:     0 16px 48px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  --sidebar-w:     260px;
  --topbar-h:      52px;
  --font-sans:     'Geist', 'DM Sans', system-ui, sans-serif;
  --font-mono:     'Geist Mono', 'Courier New', monospace;
  --font-serif:    'Lora', Georgia, serif;
  --ease:          cubic-bezier(0.4, 0, 0.2, 1);
  --spring:        cubic-bezier(0.34, 1.56, 0.64, 1);
  --trans:         0.16s var(--ease);
  --radius-sm:     8px;
  --radius-md:     12px;
  --radius-lg:     18px;
  --radius-xl:     24px;
}

body.dark {
  --bg:            #0c0c0d;
  --surface:       #141415;
  --surface-2:     #1c1c1e;
  --border:        #27272a;
  --border-soft:   #1f1f21;
  --text-primary:  #fafafa;
  --text-secondary:#a1a1aa;
  --text-muted:    #52525b;
  --accent:        #fafafa;
  --accent-2:      #d4d4d8;
  --accent-soft:   #1c1c1e;
  --user-bg:       #fafafa;
  --user-text:     #18181b;
  --shadow-sm:     0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:     0 4px 16px rgba(0,0,0,0.4);
}

html { font-size: 15px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  display: flex;
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ══ SIDEBAR ════════════════════════════════════════ */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100%;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transform: translateX(0);
  transition: transform 0.26s var(--ease), box-shadow 0.26s var(--ease);
  will-change: transform;
}

.sidebar.closed {
  transform: translateX(calc(-1 * var(--sidebar-w)));
  box-shadow: none;
}

.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 12px 14px 16px;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-mark {
  width: 28px; height: 28px;
  background: var(--text-primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--bg);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.new-chat-btn {
  margin: 0 10px 10px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--trans);
  flex-shrink: 0;
}

.new-chat-btn:hover {
  background: var(--surface-2);
  color: var(--text-primary);
  border-color: var(--border);
}

.new-chat-btn:active { transform: scale(0.98); }

.sidebar-section {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.section-label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 8px 16px 4px;
}

.chat-list { display: flex; flex-direction: column; gap: 1px; padding: 2px 8px; flex: 1; overflow-y: auto; overflow-x: hidden; min-height: 0; }

.chat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border: none;
  background: none;
  text-align: left;
  font-family: var(--font-sans);
  width: 100%;
  transition: background var(--trans), color var(--trans);
  position: relative;
}

.chat-item:hover { background: var(--border-soft); color: var(--text-primary); }
.chat-item.active { background: var(--accent-soft); color: var(--text-primary); font-weight: 500; }

.chat-item-del {
  margin-left: auto;
  opacity: 0;
  flex-shrink: 0;
  color: var(--text-muted);
  padding: 2px 4px;
  border-radius: 4px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  transition: opacity var(--trans), color var(--trans);
}

.chat-item:hover .chat-item-del { opacity: 1; }
.chat-item-del:hover { color: var(--danger); }

.sidebar-bottom {
  border-top: 1px solid var(--border-soft);
  padding: 8px 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex-shrink: 0;
}

.sidebar-menu-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-sans);
  width: 100%;
  text-align: left;
  transition: background var(--trans), color var(--trans);
}

.sidebar-menu-item:hover { background: var(--border-soft); color: var(--text-primary); }

.sidebar-divider { height: 1px; background: var(--border-soft); margin: 5px 0; }

.user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  transition: background var(--trans);
  cursor: default;
}
.user-row:hover { background: var(--border-soft); }

.user-avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--text-primary);
  color: var(--bg);
  font-size: 11px;
  font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.user-info { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.user-name { font-size: 12.5px; font-weight: 500; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-email { font-size: 11px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── Overlay ──────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 199;
  opacity: 0; pointer-events: none;
  transition: opacity 0.26s var(--ease);
  backdrop-filter: blur(2px);
}
.overlay.visible { opacity: 1; pointer-events: all; }

/* ══ ICON BUTTON ════════════════════════════════════ */
.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border: none; background: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--trans), color var(--trans);
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--border-soft); color: var(--text-primary); }

/* ══ MAIN ═══════════════════════════════════════════ */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  margin-left: var(--sidebar-w);
  transition: margin-left 0.26s var(--ease);
}
.main.sidebar-closed { margin-left: 0; }

/* ══ TOPBAR ═════════════════════════════════════════ */
.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.model-pill {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px 5px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--trans);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.model-pill:hover { background: var(--surface-2); border-color: var(--accent-2); color: var(--text-primary); }

.model-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
  animation: pulse 2.5s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; box-shadow: none; } 50% { opacity: 0.7; box-shadow: none; } }

/* Model picker */
.model-picker {
  position: absolute;
  top: calc(var(--topbar-h) - 2px);
  left: 52px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 310px;
  max-height: 80vh;
  overflow-y: auto;
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px) scale(0.96);
  transition: opacity 0.16s var(--ease), transform 0.16s var(--spring);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.model-picker.open {
  opacity: 1; pointer-events: all;
  transform: translateY(0) scale(1);
}

.model-picker-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 16px 12px;
  font-size: 14px; font-weight: 600;
  font-family: var(--font-sans);
  color: var(--text-primary);
  position: sticky; top: 0;
  background: var(--surface); z-index: 1;
  border-bottom: 1px solid var(--border-soft);
  letter-spacing: -0.01em;
}
.model-picker-close { background: none; border: none; cursor: pointer; color: var(--text-muted); display: flex; align-items: center; padding: 4px; border-radius: 6px; transition: background var(--trans); }
.model-picker-close:hover { background: var(--border-soft); color: var(--text-primary); }

.model-option {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  background: none; border: none; cursor: pointer;
  font-family: var(--font-sans);
  width: 100%; text-align: left;
  transition: background var(--trans);
  border-radius: var(--radius-sm);
}
.model-option:hover { background: var(--border-soft); }
.model-option.active { background: var(--accent-soft); }

.model-opt-info { display: flex; flex-direction: column; gap: 1px; flex: 1; min-width: 0; }
.model-opt-info strong { font-size: 13.5px; font-weight: 500; color: var(--text-primary); letter-spacing: -0.01em; }
.model-option.active .model-opt-info strong { color: var(--text-primary); }
.model-opt-info span { font-size: 11.5px; color: var(--text-muted); }

.model-check { display: flex; align-items: center; color: var(--text-primary); flex-shrink: 0; }
.model-picker-divider { height: 1px; background: var(--border-soft); margin: 4px 8px; }

.model-picker-toggle-row { display: flex; align-items: center; gap: 10px; padding: 10px 16px; }
.mp-toggle { position: relative; display: inline-block; width: 40px; height: 22px; flex-shrink: 0; }
.mp-toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.mp-toggle-track { position: absolute; inset: 0; background: var(--border); border-radius: 11px; cursor: pointer; transition: background 0.2s; }
.mp-toggle-track::after { content: ''; position: absolute; left: 2px; top: 2px; width: 18px; height: 18px; background: #fff; border-radius: 50%; transition: transform 0.2s var(--spring); box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.mp-toggle input:checked + .mp-toggle-track { background: var(--text-primary); }
.mp-toggle input:checked + .mp-toggle-track::after { transform: translateX(18px); }

.model-more-btn { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 10px 16px; background: none; border: none; cursor: pointer; font-family: var(--font-sans); font-size: 13.5px; font-weight: 500; color: var(--text-primary); transition: background var(--trans); }
.model-more-btn:hover { background: var(--border-soft); }
.more-models-list { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.more-models-list.open { max-height: 2000px; }
.model-picker-group-label { font-size: 10px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); padding: 8px 16px 4px; font-family: var(--font-sans); }

.topbar-right { margin-left: auto; display: flex; gap: 2px; }

/* ══ PAGES ══════════════════════════════════════════ */
.page {
  flex: 1;
  display: none;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.page.active { display: flex; opacity: 1; transform: translateY(0); }

/* ══ CHAT PAGE ══════════════════════════════════════ */
.chat-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  scroll-behavior: smooth;
  padding-top: 8px;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
}

/* ── Welcome ──────────────────────────────────────── */
.welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
  animation: fadeUp 0.4s var(--ease) both;
}
.welcome.gone { display: none; }

.welcome-symbol {
  width: 48px; height: 48px;
  background: var(--text-primary);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  color: var(--bg);
  margin-bottom: 20px;
  animation: breathe 4s ease-in-out infinite;
}
@keyframes breathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.04); } }

.welcome-title {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.welcome-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: center;
  max-width: 520px;
}

.chip {
  padding: 7px 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 99px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--trans);
  letter-spacing: -0.01em;
}
.chip:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ── Messages ─────────────────────────────────────── */
.messages {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 12px 20px 20px;
}

.message {
  display: flex;
  flex-direction: column;
  padding: 4px 0;
  animation: fadeUp 0.22s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Message timestamps */
.msg-time { font-size: 10px; color: var(--text-muted); font-family: var(--font-sans); margin-top: 3px; opacity: 0.6; }
.message.user .msg-time { text-align: right; }
.ai-time { margin-left: auto; font-size: 10px; }

/* ── User message ──────────────────────────────────── */
.message.user { align-items: flex-end; }

.message.user .bubble {
  background: var(--user-bg);
  color: var(--user-text);
  border-radius: var(--radius-xl) var(--radius-xl) 6px var(--radius-xl);
  padding: 11px 15px;
  max-width: min(78%, 620px);
  font-size: 14.5px;
  line-height: 1.6;
  word-break: break-word;
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* ── AI message ───────────────────────────────────── */
.message.ai { align-items: flex-start; }

.msg-header {
  display: flex; align-items: center; gap: 7px;
  margin-bottom: 5px;
}

.ai-avatar {
  width: 24px; height: 24px;
  border-radius: 7px;
  background: var(--text-primary);
  color: var(--bg);
  font-size: 11px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-sans);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.ai-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* AI bubble — clean, spacious, readable */
.message.ai .bubble {
  background: transparent;
  border-radius: 0;
  padding: 0;
  margin-left: 31px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-primary);
  max-width: min(94%, 720px);
  letter-spacing: -0.01em;
}

/* Markdown in AI bubble */
.message.ai .bubble p { margin-bottom: 12px; }
.message.ai .bubble p:last-child { margin-bottom: 0; }
.message.ai .bubble strong { font-weight: 600; color: var(--text-primary); }
.message.ai .bubble em { font-style: italic; color: var(--text-secondary); }

.message.ai .bubble code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 5px;
  color: var(--text-primary);
  letter-spacing: 0;
}

.message.ai .bubble pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 12px 0;
  font-size: 12.5px;
  line-height: 1.65;
  box-shadow: var(--shadow-sm);
}
body.dark .message.ai .bubble pre { background: var(--surface-2); }

.message.ai .bubble pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }

.message.ai .bubble ul,
.message.ai .bubble ol { padding-left: 20px; margin-bottom: 12px; }
.message.ai .bubble li { margin-bottom: 4px; }

.message.ai .bubble h1,
.message.ai .bubble h2,
.message.ai .bubble h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  margin: 20px 0 8px;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}
.message.ai .bubble h1 { font-size: 20px; }
.message.ai .bubble h2 { font-size: 17px; }
.message.ai .bubble h3 { font-size: 15px; }

.message.ai .bubble blockquote {
  border-left: 2px solid var(--border);
  padding-left: 14px;
  color: var(--text-secondary);
  margin: 10px 0;
  font-style: italic;
}

.message.ai .bubble table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13.5px;
}
.message.ai .bubble th,
.message.ai .bubble td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.message.ai .bubble th { font-weight: 600; color: var(--text-secondary); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.message.ai .bubble hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* ── AI bubble separator lines between messages ───── */
.message.ai + .message.ai {
  border-top: 1px solid var(--border-soft);
  padding-top: 14px;
  margin-top: 6px;
}

/* Message actions */
.msg-actions {
  display: flex; gap: 4px;
  margin-top: 8px;
  padding-left: 31px;
  opacity: 0;
  transition: opacity var(--trans);
}
.message.ai:hover .msg-actions { opacity: 1; }

.msg-act-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--trans);
  font-weight: 500;
}
.msg-act-btn:hover { border-color: var(--text-primary); color: var(--text-primary); background: var(--surface-2); }

/* Attachments */
.msg-image { max-width: 280px; border-radius: var(--radius-md); margin-bottom: 6px; border: 1px solid var(--border); display: block; }
.msg-audio { max-width: 280px; height: 36px; margin-bottom: 6px; border-radius: 99px; }

/* Generated image */
.gen-img-wrap { padding-left: 31px; margin: 6px 0; }
.gen-img-wrap img { max-width: 340px; border-radius: var(--radius-md); border: 1px solid var(--border); box-shadow: var(--shadow-sm); display: block; }
.gen-img-label { font-size: 11px; color: var(--text-muted); margin-top: 5px; }

/* Typing indicator */
.typing-ind {
  display: flex; align-items: center; gap: 4px;
  padding: 10px 14px;
  margin-left: 31px;
  border-radius: 0 var(--radius-md) var(--radius-md) var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  width: fit-content;
}
.t-dot {
  width: 5px; height: 5px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: bounce 1.2s ease-in-out infinite;
}
.t-dot:nth-child(2) { animation-delay: .2s; }
.t-dot:nth-child(3) { animation-delay: .4s; }
@keyframes bounce {
  0%,80%,100% { transform: translateY(0); opacity: .4; }
  40%         { transform: translateY(-5px); opacity: 1; }
}

/* ══ INPUT ZONE — Modern floating bar ═══════════════ */
.input-zone {
  padding: 10px 16px 16px;
  background: var(--bg);
  flex-shrink: 0;
  width: 100%;
  align-self: center;
  padding-left: max(16px, calc((100% - 820px) / 2));
  padding-right: max(16px, calc((100% - 820px) / 2));
}

.attach-previews {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.att-prev {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 7px 10px; min-width: 130px; max-width: 200px;
  position: relative; animation: attIn .16s ease;
}
@keyframes attIn { from { opacity:0; transform:scale(.95); } to { opacity:1; transform:none; } }
.att-thumb { width: 32px; height: 32px; border-radius: 6px; object-fit: cover; flex-shrink: 0; }
.att-icon { width: 32px; height: 32px; border-radius: 6px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; background: var(--border-soft); color: var(--text-muted); }
.att-icon-pdf   { background: rgba(220,38,38,.08);  color: #dc2626; }
.att-icon-video { background: rgba(59,130,246,.08); color: #3b82f6; }
.att-icon-audio { background: var(--surface-2); color: var(--text-muted); }
.att-info { display: flex; flex-direction: column; gap: 1px; overflow: hidden; }
.att-name { font-size: 12px; font-weight: 500; font-family: var(--font-sans); color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; letter-spacing: -0.01em; }
.att-meta { font-size: 10.5px; color: var(--text-muted); font-family: var(--font-sans); }
.att-rm { position: absolute; top: 4px; right: 4px; background: none; border: none; cursor: pointer; color: var(--text-muted); font-size: 14px; line-height: 1; padding: 2px 4px; border-radius: 4px; transition: color var(--trans); }
.att-rm:hover { color: var(--danger); }

/* ── Message bar — main redesign ─────────────────── */
.input-shell {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
  transition: border-color 0.2s, box-shadow 0.2s;
  overflow: hidden;
}
.input-shell:focus-within {
  border-color: var(--accent-2);
  box-shadow: 0 4px 24px rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.04);
}

/* Top row: textarea */
.input-shell-top {
  display: flex;
  align-items: flex-end;
  padding: 12px 12px 4px 14px;
  gap: 8px;
}

.input-field {
  flex: 1;
  border: none; outline: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.55;
  resize: none;
  max-height: 180px;
  overflow-y: auto;
  padding: 2px 0;
  caret-color: var(--text-primary);
  letter-spacing: -0.01em;
}
.input-field::placeholder { color: var(--text-muted); }

/* Bottom row: action buttons */
.input-shell-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px 8px;
  gap: 6px;
}

.input-shell-left {
  display: flex;
  align-items: center;
  gap: 4px;
}

.input-shell-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Action icon buttons inside bar */
.bar-icon-btn {
  width: 34px; height: 34px;
  border: none;
  background: none;
  color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--trans), color var(--trans);
  flex-shrink: 0;
}
.bar-icon-btn:hover { background: var(--border-soft); color: var(--text-primary); }
.bar-icon-btn.active { color: #3b82f6; background: rgba(59,130,246,.08); }

/* attach label override */
.attach-btn { padding: 0; }

/* mic recording */
.mic-btn.recording {
  color: #dc2626 !important;
  background: rgba(220,38,38,.08) !important;
  animation: mic-pulse 1.2s ease-in-out infinite;
}
@keyframes mic-pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(220,38,38,.3); }
  50%      { box-shadow: 0 0 0 6px rgba(220,38,62,0); }
}

/* send — filled dark pill */
.send-btn {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--text-primary);
  color: var(--bg);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; flex-shrink: 0;
  transition: transform 0.12s var(--spring), opacity 0.14s, background var(--trans);
}
.send-btn:hover:not(:disabled) { transform: scale(1.05); }
.send-btn:active:not(:disabled) { transform: scale(0.92); }
.send-btn:disabled { opacity: 0.2; cursor: default; }

/* stop */
.stop-btn {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  border: none; background: var(--text-primary); color: var(--bg);
  display: none; align-items: center; justify-content: center;
  cursor: pointer; flex-shrink: 0;
  transition: transform 0.12s;
}
.stop-btn:hover { transform: scale(1.05); }

.input-caption {
  text-align: center; font-size: 11px;
  color: var(--text-muted); margin-top: 6px;
  letter-spacing: -0.01em;
}

/* Keep msg-bar-btn and msg-bar-right for compatibility */
.msg-bar-btn {
  width: 34px; height: 34px; border-radius: var(--radius-sm);
  border: none; background: none;
  color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; flex-shrink: 0;
  transition: background var(--trans), color var(--trans);
  font-size: 0;
}
.msg-bar-btn:hover { background: var(--border-soft); color: var(--text-primary); }
.msg-bar-right { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

/* ══ SETTINGS PAGE ══════════════════════════════════ */
.settings-wrap {
  flex: 1; overflow-y: auto; max-width: 600px;
  width: 100%; margin: 0 auto; padding: 0 20px 48px;
}

.page-header {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 0 20px;
  position: sticky; top: 0;
  background: var(--bg); z-index: 5;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 22px;
}

.back-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 6px 10px;
  background: none; border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary); cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--trans);
  letter-spacing: -0.01em;
}
.back-btn:hover { background: var(--border-soft); color: var(--text-primary); }

.page-title {
  font-family: var(--font-sans);
  font-size: 18px; font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.settings-body { display: flex; flex-direction: column; gap: 28px; }
.settings-group { display: flex; flex-direction: column; gap: 2px; }
.settings-group-title { font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 8px; }

.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 0; transition: background var(--trans);
}
.settings-row:first-of-type { border-radius: var(--radius-md) var(--radius-md) 0 0; }
.settings-row:last-of-type  { border-radius: 0 0 var(--radius-md) var(--radius-md); }
.settings-row:only-of-type  { border-radius: var(--radius-md); }
.settings-row + .settings-row { border-top: none; }
.settings-row > div { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.settings-row > div strong { font-size: 13.5px; font-weight: 500; color: var(--text-primary); letter-spacing: -0.01em; }
.settings-row > div p { font-size: 12px; color: var(--text-muted); }
.link-row { cursor: pointer; }
.link-row:hover { background: var(--surface-2); }

.settings-input {
  width: 180px; padding: 7px 10px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); font-family: var(--font-sans); font-size: 13px;
  color: var(--text-primary); outline: none;
  transition: border-color 0.15s, box-shadow 0.15s; flex-shrink: 0;
  letter-spacing: -0.01em;
}
.settings-input:focus { border-color: var(--text-primary); box-shadow: 0 0 0 3px rgba(0,0,0,0.06); }

.settings-select {
  padding: 7px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); font-family: var(--font-sans); font-size: 13px;
  color: var(--text-primary); outline: none; cursor: pointer; flex-shrink: 0;
}

.settings-btn {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); font-family: var(--font-sans); font-size: 12.5px; font-weight: 500;
  color: var(--text-secondary); cursor: pointer;
  transition: all var(--trans); flex-shrink: 0; letter-spacing: -0.01em;
}
.settings-btn:hover { background: var(--surface-2); color: var(--text-primary); }
.settings-btn.danger { color: var(--danger); }
.settings-btn.danger:hover { background: var(--danger-soft); border-color: var(--danger); }

.toggle-group { display: flex; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; }
.toggle-opt {
  padding: 6px 12px; font-size: 12.5px; font-weight: 500; font-family: var(--font-sans);
  border: none; background: none; color: var(--text-secondary); cursor: pointer;
  transition: background var(--trans), color var(--trans);
}
.toggle-opt + .toggle-opt { border-left: 1px solid var(--border); }
.toggle-opt.active { background: var(--accent-soft); color: var(--text-primary); }

/* Switch */
.switch { position: relative; display: inline-block; width: 38px; height: 20px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-thumb { position: absolute; inset: 0; background: var(--border); border-radius: 99px; cursor: pointer; transition: background 0.2s; }
.switch-thumb::after { content: ''; position: absolute; width: 14px; height: 14px; border-radius: 50%; background: white; top: 3px; left: 3px; transition: transform 0.2s var(--spring); box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
.switch input:checked + .switch-thumb { background: var(--text-primary); }
.switch input:checked + .switch-thumb::after { transform: translateX(18px); }

.primary-action-btn {
  width: 100%; padding: 11px; background: var(--text-primary); color: var(--bg);
  border: none; border-radius: var(--radius-md); font-size: 14px; font-weight: 600;
  font-family: var(--font-sans); cursor: pointer;
  transition: opacity var(--trans), transform 0.12s var(--spring);
  letter-spacing: -0.01em;
}
.primary-action-btn:hover { opacity: 0.9; transform: translateY(-1px); }

.danger-action-btn {
  width: 100%; padding: 10px; background: none; color: var(--danger);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  font-size: 13.5px; font-family: var(--font-sans); cursor: pointer;
  margin-top: 8px; transition: all var(--trans);
}
.danger-action-btn:hover { background: var(--danger-soft); border-color: var(--danger); }

/* ══ LEGAL PAGES ════════════════════════════════════ */
.legal-wrap { flex: 1; overflow-y: auto; max-width: 680px; width: 100%; margin: 0 auto; padding: 0 20px 56px; }
.legal-body { font-size: 14px; line-height: 1.8; color: var(--text-secondary); }
.legal-body h1 { font-family: var(--font-sans); font-size: 24px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.03em; margin-bottom: 6px; }
.legal-body .legal-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 32px; display: block; }
.legal-body h2 { font-family: var(--font-sans); font-size: 16px; font-weight: 600; color: var(--text-primary); margin: 28px 0 8px; letter-spacing: -0.02em; }
.legal-body p { margin-bottom: 12px; }
.legal-body ul { padding-left: 20px; margin-bottom: 12px; }
.legal-body li { margin-bottom: 5px; }
.legal-body a { color: var(--text-primary); text-decoration: underline; }
.legal-body strong { color: var(--text-primary); font-weight: 600; }
.legal-body .legal-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 14px 18px; margin: 14px 0; }

/* ══ POPOVER ════════════════════════════════════════ */
.popover {
  position: fixed; bottom: 70px; left: 10px; width: 210px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  z-index: 400; overflow: hidden; opacity: 0; pointer-events: none;
  transform: translateY(6px) scale(0.97);
  transition: opacity 0.16s var(--ease), transform 0.16s var(--spring);
}
.popover.open { opacity: 1; pointer-events: all; transform: translateY(0) scale(1); }

.popover-item {
  display: flex; align-items: center; gap: 9px;
  width: 100%; padding: 9px 12px;
  font-size: 13px; font-weight: 500; font-family: var(--font-sans);
  color: var(--text-secondary); border: none; background: none; cursor: pointer;
  text-align: left; transition: background var(--trans), color var(--trans);
  letter-spacing: -0.01em;
}
.popover-item:hover { background: var(--border-soft); color: var(--text-primary); }
.popover-item.danger { color: var(--danger); }
.popover-item.danger:hover { background: var(--danger-soft); }
.popover-divider { height: 1px; background: var(--border-soft); margin: 3px 0; }

/* ══ TOAST ══════════════════════════════════════════ */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--text-primary); color: var(--bg);
  padding: 8px 18px; border-radius: 99px;
  font-size: 13px; font-weight: 500; letter-spacing: -0.01em;
  z-index: 999; opacity: 0; pointer-events: none;
  transition: opacity 0.18s, transform 0.18s var(--spring);
  white-space: nowrap; font-family: var(--font-sans);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ══ CONFIRM DIALOG ═════════════════════════════════ */
.dialog-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.35);
  z-index: 500; display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.18s;
  backdrop-filter: blur(4px);
}
.dialog-overlay.open { opacity: 1; pointer-events: all; }

.dialog {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 28px;
  width: 340px; box-shadow: var(--shadow-lg);
  transform: scale(0.96) translateY(8px);
  transition: transform 0.2s var(--spring);
}
.dialog-overlay.open .dialog { transform: scale(1) translateY(0); }

.dialog-title { font-family: var(--font-sans); font-size: 17px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.02em; }
.dialog-body { font-size: 13.5px; color: var(--text-secondary); margin-bottom: 22px; line-height: 1.6; }
.dialog-actions { display: flex; gap: 8px; justify-content: flex-end; }

.dialog-cancel {
  padding: 7px 16px; border: 1px solid var(--border); background: none;
  border-radius: var(--radius-sm); font-size: 13px; font-weight: 500;
  font-family: var(--font-sans); color: var(--text-secondary); cursor: pointer;
  transition: all var(--trans); letter-spacing: -0.01em;
}
.dialog-cancel:hover { background: var(--border-soft); }

.dialog-confirm {
  padding: 7px 16px; border: none; background: var(--danger);
  color: white; border-radius: var(--radius-sm); font-size: 13px;
  font-weight: 600; font-family: var(--font-sans); cursor: pointer;
  transition: background var(--trans); letter-spacing: -0.01em;
}
.dialog-confirm:hover { background: #b91c1c; }

/* ══ RESPONSIVE — Mobile-first ══════════════════════ */
@media (max-width: 700px) {
  .main { margin-left: 0 !important; }
  .message.user .bubble { max-width: 88%; }
  .message.ai .bubble { max-width: 100%; margin-left: 0; }
  .msg-header { gap: 6px; }
  .msg-actions { opacity: 1; padding-left: 0; }
  .typing-ind { margin-left: 0; }
  .messages { padding: 10px 14px 16px; gap: 2px; }
  .input-zone { padding: 8px 12px 14px; }
  .welcome-title { font-size: 24px; }
  .welcome-symbol { width: 40px; height: 40px; }
  .model-picker { left: 8px; width: calc(100vw - 16px); }
  .input-shell { border-radius: var(--radius-lg); }
}

/* ══ UPGRADE MODAL ══════════════════════════════════ */
.upgrade-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,.45); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
.upgrade-overlay.open { opacity: 1; pointer-events: all; }
.upgrade-modal {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 36px 28px 24px;
  width: min(400px, calc(100vw - 28px)); box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; align-items: center; text-align: center;
  animation: modalIn .22s var(--spring) both;
}
@keyframes modalIn { from { transform: translateY(16px) scale(.95); opacity: 0; } to { transform: none; opacity: 1; } }
.upgrade-close {
  position: absolute; top: 14px; right: 14px; background: none; border: none;
  cursor: pointer; color: var(--text-muted); padding: 4px; border-radius: 6px;
  display: flex; align-items: center; transition: color var(--trans), background var(--trans);
}
.upgrade-close:hover { color: var(--text-primary); background: var(--border-soft); }
.upgrade-icon { font-size: 30px; margin-bottom: 10px; background: linear-gradient(135deg,#7c5cbf,#5b8de8); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.upgrade-title { font-size: 20px; font-weight: 700; font-family: var(--font-sans); color: var(--text-primary); margin: 0 0 6px; letter-spacing: -0.03em; }
.upgrade-sub { font-size: 13.5px; color: var(--text-muted); margin: 0 0 18px; font-family: var(--font-sans); line-height: 1.5; letter-spacing: -0.01em; }
.upgrade-features { list-style: none; padding: 0; margin: 0 0 20px; width: 100%; text-align: left; display: flex; flex-direction: column; gap: 9px; }
.upgrade-features li { display: flex; align-items: center; gap: 10px; font-size: 13px; font-family: var(--font-sans); color: var(--text-secondary); letter-spacing: -0.01em; }
.upgrade-features li svg { flex-shrink: 0; color: #5b8de8; }
.upgrade-btn {
  display: flex; align-items: center; gap: 8px; width: 100%; justify-content: center;
  padding: 12px 20px; border-radius: var(--radius-md); border: none;
  background: linear-gradient(135deg,#7c5cbf,#5b8de8); color: #fff;
  font-size: 14px; font-weight: 600; font-family: var(--font-sans); cursor: pointer;
  margin-bottom: 10px; transition: opacity .15s, transform .15s; letter-spacing: -0.01em;
}
.upgrade-btn:hover { opacity: .9; transform: translateY(-1px); }
.upgrade-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.upgrade-note { font-size: 11px; color: var(--text-muted); font-family: var(--font-sans); margin: 0; }

/* ══ UPGRADE CTA + PLAN BADGE ═══════════════════════ */
.upgrade-cta {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 8px 12px; margin-bottom: 4px; border-radius: var(--radius-sm); border: none;
  background: linear-gradient(135deg,rgba(124,92,191,.1),rgba(91,141,232,.1));
  color: #7c5cbf; font-size: 12.5px; font-weight: 600; font-family: var(--font-sans);
  cursor: pointer; transition: background var(--trans); letter-spacing: -0.01em;
}
.upgrade-cta:hover { background: linear-gradient(135deg,rgba(124,92,191,.18),rgba(91,141,232,.18)); }
.dark .upgrade-cta { color: #a98cf5; }
.plan-badge {
  font-size: 9px; font-weight: 700; font-family: var(--font-sans);
  letter-spacing: 0.05em; text-transform: uppercase;
  padding: 1px 5px; border-radius: 3px; flex-shrink: 0;
}
.plan-badge.free { background: var(--border-soft); color: var(--text-muted); border: 1px solid var(--border); }
.plan-badge.pro  { background: linear-gradient(135deg,#7c5cbf,#5b8de8); color: #fff; }

/* ══ SIDEBAR NAV ════════════════════════════════════ */
.sidebar-menu-item.nav-active { background: var(--accent-soft); color: var(--text-primary); font-weight: 600; }

/* ══ AUTH EXTRAS ════════════════════════════════════ */
.field-error { color: var(--danger); font-size: 12px; margin-top: 4px; display: none; font-family: var(--font-sans); }
.field-input.invalid { border-color: var(--danger) !important; box-shadow: 0 0 0 2px rgba(220,38,38,.1); }
.alert-box { background: #fef2f2; border: 1px solid #fecaca; border-radius: var(--radius-sm); padding: 10px 14px; font-size: 13px; color: var(--danger); font-family: var(--font-sans); margin-bottom: 14px; display: none; }
.alert-box.success { background: #f0fdf4; border-color: #bbf7d0; color: #15803d; }
.demo-hint { font-size: 11.5px; color: var(--text-muted); text-align: center; margin-top: 8px; font-family: var(--font-sans); }

/* ══ SEARCH MODE ════════════════════════════════════ */
.search-toggle-btn.active { color: #3b82f6 !important; background: rgba(59,130,246,.08); border-radius: var(--radius-sm); }

/* ══ SEARCH PANEL ═══════════════════════════════════ */
.search-panel {
  position: absolute; bottom: 0; right: 0;
  width: min(400px, 100%); max-height: 68vh;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-lg); z-index: 40; flex-direction: column; overflow: hidden;
  animation: slideUp .2s var(--ease);
}
@keyframes slideUp { from { transform: translateY(100%); } to { transform: none; } }
@media (max-width: 700px) { .search-panel { width: 100%; } }

.search-panel-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-bottom: 1px solid var(--border-soft); flex-shrink: 0; }
.search-panel-title { display: flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500; font-family: var(--font-sans); color: var(--text-secondary); letter-spacing: -0.01em; }
.search-panel-title em { color: var(--text-primary); font-style: normal; font-weight: 600; }
.search-panel-close { background: none; border: none; cursor: pointer; font-size: 18px; color: var(--text-muted); padding: 2px 6px; border-radius: 4px; transition: color var(--trans); }
.search-panel-close:hover { color: var(--text-primary); }
.search-results { overflow-y: auto; flex: 1; padding: 10px 12px 14px; display: flex; flex-direction: column; gap: 7px; }
.search-answer-box { background: var(--accent-soft); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 12px 14px; }
.sab-title   { font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; font-family: var(--font-sans); text-transform: uppercase; letter-spacing: 0.06em; }
.sab-answer  { font-size: 15px; font-weight: 500; color: var(--text-primary); font-family: var(--font-sans); letter-spacing: -0.02em; }
.sab-snippet { font-size: 12.5px; color: var(--text-secondary); font-family: var(--font-sans); margin-top: 4px; line-height: 1.5; }
.search-result-card { display: block; text-decoration: none; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 10px 12px; transition: border-color var(--trans), background var(--trans); }
.search-result-card:hover { border-color: var(--text-primary); background: var(--border-soft); }
.src-source  { font-size: 10.5px; color: var(--text-muted); margin-bottom: 3px; font-family: var(--font-sans); }
.src-title   { font-size: 13px; font-weight: 500; color: var(--text-primary); margin-bottom: 4px; font-family: var(--font-sans); line-height: 1.35; letter-spacing: -0.01em; }
.src-snippet { font-size: 12px; color: var(--text-secondary); font-family: var(--font-sans); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.search-related { padding-top: 4px; }
.search-related-label { font-size: 10px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 6px; font-family: var(--font-sans); }
.search-related-chip { display: inline-block; margin: 3px 4px 3px 0; padding: 5px 10px; border-radius: 99px; background: var(--border-soft); border: 1px solid var(--border); font-size: 12px; font-weight: 500; font-family: var(--font-sans); color: var(--text-secondary); cursor: pointer; transition: background var(--trans), color var(--trans); letter-spacing: -0.01em; }
.search-related-chip:hover { background: var(--accent-soft); color: var(--text-primary); border-color: var(--text-primary); }

/* ══ MODEL TAGS ═════════════════════════════════════ */
.model-vision-tag {
  font-size: 9px; font-weight: 700; font-family: var(--font-sans); letter-spacing: .05em; text-transform: uppercase;
  padding: 2px 5px; border-radius: 4px; background: rgba(59,130,246,.1); color: #3b82f6; flex-shrink: 0;
}
.model-tag-reasoning {
  font-size: 9px; font-weight: 700; font-family: var(--font-sans); letter-spacing: .05em; text-transform: uppercase;
  padding: 2px 5px; border-radius: 4px; background: rgba(234,88,12,.1); color: #ea580c; flex-shrink: 0;
}
.dark .model-tag-reasoning { background: rgba(234,88,12,.15); color: #fb923c; }
.ai-model-label { font-size: 10px; color: var(--text-muted); font-family: var(--font-sans); margin-left: 4px; font-weight: 400; }

/* ══ AI BUBBLE ANIMATION ════════════════════════════ */
.ai-bubble { opacity: 0; animation: bubbleIn .2s var(--ease) forwards; }
@keyframes bubbleIn { from { opacity: 0; transform: translateY(3px); } to { opacity: 1; transform: none; } }
.ai-bubble.done { opacity: 1; }
.ai-bubble:not(.done)::after {
  content: '▋'; display: inline-block;
  animation: blink .65s step-end infinite;
  color: var(--text-muted); font-size: .85em; margin-left: 1px;
}
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0; } }

/* ══ THINK BLOCK ════════════════════════════════════ */
.think-block { margin: 6px 0 10px; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; font-family: var(--font-sans); }
.think-block summary { padding: 7px 12px; font-size: 12px; font-weight: 500; color: var(--text-muted); cursor: pointer; background: var(--surface-2); display: flex; align-items: center; gap: 6px; list-style: none; user-select: none; letter-spacing: -0.01em; }
.think-block summary::-webkit-details-marker { display: none; }
.think-block summary::before { content: '▶'; font-size: 9px; transition: transform .18s; }
.think-block[open] summary::before { transform: rotate(90deg); }
.think-toggle { font-size: 10px; color: var(--text-muted); margin-left: auto; }
.think-body { padding: 10px 14px; font-size: 12.5px; color: var(--text-secondary); line-height: 1.6; border-top: 1px solid var(--border-soft); background: var(--bg); max-height: 280px; overflow-y: auto; }
.think-body p { margin-bottom: 6px; }

/* ══ VOICE ══════════════════════════════════════════ */
#micBtn.recording { color: #dc2626 !important; background: rgba(220,38,38,.08) !important; animation: mic-pulse 1.2s ease-in-out infinite; }
.rec-timer { font-size: 10px; font-weight: 700; font-family: var(--font-sans); color: inherit; min-width: 26px; letter-spacing: .02em; position: absolute; bottom: -14px; left: 50%; transform: translateX(-50%); white-space: nowrap; }
#micBtn { position: relative; }
.msg-voice-player { display: flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: var(--radius-md); background: var(--surface-2); border: 1px solid var(--border-soft); margin-bottom: 4px; }
.msg-voice-player audio { height: 26px; flex: 1; min-width: 0; }
.msg-voice { display: flex; align-items: center; gap: 8px; padding: 7px 12px; background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md); margin-bottom: 4px; }
.voice-dur { font-size: 11px; color: var(--text-muted); }

/* ══ FILE CHIP ══════════════════════════════════════ */
.msg-file-chip { display: inline-flex; align-items: center; gap: 6px; background: var(--border-soft); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 4px 9px; font-size: 12px; font-weight: 500; font-family: var(--font-sans); color: var(--text-secondary); margin-bottom: 5px; letter-spacing: -0.01em; }
.act-btn { display: inline-flex; align-items: center; gap: 5px; padding: 4px 9px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text-muted); font-size: 11.5px; font-weight: 500; font-family: var(--font-sans); cursor: pointer; transition: background var(--trans), color var(--trans); letter-spacing: -0.01em; }
.act-btn:hover { background: var(--border-soft); color: var(--text-primary); }

/* ══ UPGRADE (HIDE WHEN FREE) ═══════════════════════ */
.upgrade-cta { display: none !important; }

/* ══ TABLES IN MARKDOWN ═════════════════════════════ */
.md-table-wrap {
  overflow-x: auto;
  margin: 14px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}
.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  font-family: var(--font-sans);
}
.md-table th {
  padding: 9px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.md-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-primary);
  vertical-align: top;
  line-height: 1.5;
}
.md-table tr:last-child td { border-bottom: none; }
.md-table tr:hover td { background: var(--border-soft); }

/* ══ AI BUBBLE — proper bubble wrap ════════════════ */
.message.ai .bubble {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  padding: 14px 16px;
  margin-left: 31px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-primary);
  max-width: min(94%, 720px);
  letter-spacing: -0.01em;
  box-shadow: var(--shadow-sm);
}
body.dark .message.ai .bubble {
  background: var(--surface);
  border-color: var(--border);
}

/* Links in AI bubble */
.message.ai .bubble a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.message.ai .bubble del { text-decoration: line-through; color: var(--text-muted); }

/* ══ AUTO-SEARCH BADGE ══════════════════════════════ */
.search-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 2px 7px;
  border-radius: 99px;
  letter-spacing: 0.02em;
  margin-left: 4px;
}

/* ══ SEARCH SOURCES ═════════════════════════════════ */
.search-sources {
  margin: 8px 0 0 31px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.search-sources-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-sans);
}
.search-sources-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.search-source-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px 4px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 11.5px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--trans);
  letter-spacing: -0.01em;
}
.search-source-chip:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}
.source-num {
  width: 16px; height: 16px;
  background: var(--surface-2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}
.source-title {
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ══ REMOVE GREEN — replace accent ═════════════════ */
/* Override any leftover green model-dot */
.model-dot { background: var(--text-muted) !important; animation: none !important; box-shadow: none !important; }

/* ══ MOBILE RESPONSIVE UPDATES ══════════════════════ */
@media (max-width: 700px) {
  .message.ai .bubble { margin-left: 0; border-radius: var(--radius-md); }
  .search-sources { margin-left: 0; }
  .md-table { font-size: 12px; }
  .md-table th, .md-table td { padding: 7px 10px; }
}

/* ── v18 additions ─────────────────────────────── */

/* Chat list groups */
.chat-group-label { font-size:10px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--text-muted);padding:10px 14px 3px;font-family:var(--font-sans) }
.chat-empty { padding:12px 16px;font-size:12px;color:var(--text-muted);font-family:var(--font-sans) }
.chat-item-content { display:flex;flex-direction:column;gap:1px;flex:1;overflow:hidden;min-width:0 }
.chat-item-title { font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-primary);font-family:var(--font-sans) }
.chat-item-model { font-size:10px;color:var(--text-muted);font-family:var(--font-sans);white-space:nowrap;overflow:hidden;text-overflow:ellipsis }

/* User bubble */
.user-bubble { background:var(--user-bg);color:var(--user-text);border-radius:18px 18px 4px 18px;padding:10px 14px;font-size:14.5px;line-height:1.5;font-family:var(--font-sans);max-width:100%;word-break:break-word }

/* User message actions */
.user-actions { justify-content:flex-end }

/* Edit textarea */
.msg-edit-area { width:100%;min-height:60px;max-height:200px;padding:10px 14px;border-radius:14px;border:2px solid var(--accent);background:var(--surface);color:var(--text-primary);font-size:14.5px;font-family:var(--font-sans);line-height:1.5;resize:vertical;outline:none;box-sizing:border-box }
.act-btn-save { background:var(--accent);color:var(--surface)!important;border-color:var(--accent)!important }
.act-btn-save:hover { opacity:.9 }

/* AI bubble wrapper */
.ai-bubble-wrap { background:transparent;padding:0 }

/* Spin animation */
@keyframes spin { to { transform:rotate(360deg) } }
.spin { animation:spin .8s linear infinite;transform-origin:center }

/* Mic recording */
.mic-btn.recording { color:#e53e3e!important;animation:pulse 1s ease-in-out infinite }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:.5} }

/* Generation page improvements */
.gen-loading { display:flex;align-items:center;gap:8px;font-family:var(--font-sans) }
.gen-history-label { font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);margin-bottom:10px;font-family:var(--font-sans) }
.gen-history-grid { display:grid;grid-template-columns:repeat(4,1fr);gap:8px }
.gen-history-item { cursor:pointer;border-radius:8px;overflow:hidden;border:1px solid var(--border);transition:transform .15s,box-shadow .15s }
.gen-history-item:hover { transform:scale(1.04);box-shadow:var(--shadow-md) }
.gen-history-item img { width:100%;aspect-ratio:1;object-fit:cover;display:block }
.gen-history-prompt { font-size:10px;color:var(--text-muted);font-family:var(--font-sans);padding:4px 5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis }
#genHistoryWrap { margin-top:20px }