:root {
  --bg: #020b14;
  --panel: #040f1a;
  --border: #0a3a5a;
  --accent: #00c8ff;
  --accent2: #0066ff;
  --accent-glow: rgba(0,200,255,0.15);
  --text: #c8e8f8;
  --text-dim: #4a7a9a;
  --user-bubble: #0a2540;
  --ai-bubble: #051825;
  --danger: #ff4060;
  --persona-color: #00c8ff;
  --persona-glow: rgba(0,200,255,0.2);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background:
    radial-gradient(ellipse at 60% 30%, rgba(0,100,255,0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(0,200,255,0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: ambientPulse 8s ease-in-out infinite alternate;
}

@keyframes ambientPulse { from { opacity:0.6; } to { opacity:1; } }

/* ─── HEADER ─── */
header {
  position: relative; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(4,15,26,0.97);
  backdrop-filter: blur(20px);
  flex-shrink: 0;
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon { width: 38px; height: 38px; }
.logo-icon svg { width: 100%; height: 100%; filter: drop-shadow(0 0 8px var(--persona-color)); animation: logoSpin 20s linear infinite; }
@keyframes logoSpin { from { transform:rotate(0deg); } to { transform:rotate(360deg); } }

.logo-text h1 {
  font-family: 'Orbitron', monospace;
  font-size: 1.2rem; font-weight: 900;
  letter-spacing: 0.3em;
  color: var(--persona-color);
  text-shadow: 0 0 20px var(--persona-glow);
  transition: color 0.4s, text-shadow 0.4s;
}
.logo-text p {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.58rem; color: var(--text-dim);
  letter-spacing: 0.15em; margin-top: 1px;
}

.header-right { display: flex; align-items: center; gap: 10px; }

.status-item {
  display: flex; align-items: center; gap: 6px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem; color: var(--text-dim);
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #00ff88; box-shadow: 0 0 8px #00ff88;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.4; } }

.settings-btn {
  display: flex; align-items: center; gap: 6px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.6rem; letter-spacing: 0.12em;
  color: var(--text-dim);
  background: rgba(0,200,255,0.04);
  border: 1px solid var(--border);
  padding: 5px 11px;
  cursor: pointer;
  border-radius: 1px;
  transition: all 0.2s;
  white-space: nowrap;
  position: relative;
}
.settings-btn:hover {
  border-color: var(--persona-color);
  color: var(--persona-color);
  background: rgba(0,200,255,0.08);
  box-shadow: 0 0 10px var(--persona-glow);
}
.settings-btn.open {
  border-color: var(--persona-color);
  color: var(--persona-color);
  background: rgba(0,200,255,0.1);
  box-shadow: 0 0 14px var(--persona-glow);
}
.settings-btn svg {
  width: 13px; height: 13px;
  fill: currentColor;
  transition: transform 0.4s;
}
.settings-btn.open svg { transform: rotate(60deg); }

/* ─── SETTINGS PANEL ─── */
#settingsPanel {
  position: absolute;
  top: calc(100% + 1px);
  right: 0;
  width: 340px;
  background: rgba(3,12,22,0.98);
  border: 1px solid var(--border);
  border-top: 2px solid var(--persona-color);
  backdrop-filter: blur(30px);
  z-index: 200;
  padding: 0;
  transform-origin: top right;
  transform: scaleY(0) scaleX(0.95);
  opacity: 0;
  pointer-events: none;
  transition: border-top-color 0.4s, transform 0.22s cubic-bezier(0.22,1,0.36,1), opacity 0.2s ease;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 30px rgba(0,200,255,0.06);
  overflow: hidden;
}
#settingsPanel.open {
  transform: scaleY(1) scaleX(1);
  opacity: 1;
  pointer-events: all;
}

.sp-section {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(10,58,90,0.5);
}
.sp-section:last-child { border-bottom: none; }

.sp-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.55rem; letter-spacing: 0.2em;
  color: var(--text-dim); margin-bottom: 10px;
  display: flex; align-items: center; gap: 6px;
}
.sp-label::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

.sp-model-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }

.sp-model-btn {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.6rem; letter-spacing: 0.1em;
  padding: 8px 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  border-radius: 1px;
  transition: all 0.18s;
  text-align: left;
  display: flex; flex-direction: column; gap: 2px;
}
.sp-model-btn .btn-name { font-size: 0.65rem; color: var(--text); }
.sp-model-btn .btn-tag { font-size: 0.5rem; letter-spacing: 0.15em; opacity: 0.5; color: var(--text-dim); }
.sp-model-btn:hover { border-color: var(--accent); color: var(--accent); }
.sp-model-btn:hover .btn-name { color: var(--accent); }
.sp-model-btn.active {
  border-color: var(--accent);
  background: rgba(0,200,255,0.07);
  box-shadow: 0 0 10px rgba(0,200,255,0.15), inset 0 0 10px rgba(0,200,255,0.04);
}
.sp-model-btn.active .btn-name { color: var(--accent); }
.sp-model-btn.active .btn-tag { color: var(--accent); opacity: 0.7; }
.sp-model-btn .active-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  display: none; margin-left: auto; margin-top: 2px;
}
.sp-model-btn.active .active-dot { display: block; }

.sp-persona-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }

.sp-persona-btn {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.58rem; letter-spacing: 0.06em;
  padding: 8px 6px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  border-radius: 1px;
  transition: all 0.2s;
  display: flex; flex-direction: column;
  align-items: center; gap: 4px;
}
.sp-persona-btn .p-emoji { font-size: 1.2rem; line-height: 1; }
.sp-persona-btn .p-name { font-size: 0.52rem; letter-spacing: 0.12em; }
.sp-persona-btn:hover { filter: brightness(1.4); transform: translateY(-1px); }
.sp-persona-btn.active {
  box-shadow: 0 0 14px var(--p-glow, rgba(0,200,255,0.3));
  transform: translateY(-1px);
}

.sp-footer {
  padding: 8px 16px;
  background: rgba(0,0,0,0.2);
  display: flex; align-items: center; justify-content: space-between;
}
.sp-active-info {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.55rem; letter-spacing: 0.12em;
  color: var(--persona-color);
  display: flex; align-items: center; gap: 6px;
  transition: color 0.4s;
}
.sp-active-info::before {
  content: '';
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--persona-color);
  box-shadow: 0 0 6px var(--persona-color);
  transition: background 0.4s, box-shadow 0.4s;
}
.sp-close-btn {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.55rem; color: var(--text-dim);
  background: none; border: none; cursor: pointer;
  letter-spacing: 0.1em; padding: 2px 4px;
  transition: color 0.2s;
}
.sp-close-btn:hover { color: var(--text); }

#settingsOverlay { position: fixed; inset: 0; z-index: 150; display: none; }
#settingsOverlay.open { display: block; }

/* ─── MESSAGES ─── */
#messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative; z-index: 5;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
#messages::-webkit-scrollbar { width: 3px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.msg {
  display: flex; gap: 10px;
  animation: msgIn 0.28s ease forwards;
  opacity: 0; transform: translateY(8px);
}
@keyframes msgIn { to { opacity:1; transform:translateY(0); } }
.msg.user { flex-direction: row-reverse; }

.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Orbitron', monospace;
  font-size: 0.6rem; font-weight: 700;
}
.avatar.ai-avatar {
  background: linear-gradient(135deg, #001830, #003060);
  border: 1px solid var(--persona-color);
  color: var(--persona-color);
  box-shadow: 0 0 12px var(--persona-glow), inset 0 0 10px rgba(0,200,255,0.05);
  transition: border-color 0.4s, color 0.4s, box-shadow 0.4s;
  font-size: 0.9rem;
}
.avatar.user {
  background: linear-gradient(135deg, #0a1a30, #1a3060);
  border: 1px solid #0066ff;
  color: #4090ff;
}

/* ─── BUBBLE ─── */
.bubble-wrap { display: flex; flex-direction: column; gap: 4px; max-width: 74%; }
.msg.user .bubble-wrap { align-items: flex-end; }

.bubble {
  width: 100%;
  padding: 10px 14px;
  border-radius: 2px;
  font-size: 0.93rem;
  line-height: 1.65;
  position: relative;
}
.bubble::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
}
.msg.ai .bubble {
  background: var(--ai-bubble);
  border: 1px solid rgba(0,200,255,0.12);
  border-left: 2px solid var(--persona-color);
  transition: border-left-color 0.4s;
}
.msg.ai .bubble::before { background: linear-gradient(90deg, var(--persona-color), transparent); }
.msg.user .bubble {
  background: var(--user-bubble);
  border: 1px solid rgba(0,100,255,0.2);
  border-right: 2px solid #0066ff;
  text-align: right;
}
.msg.user .bubble::before { background: linear-gradient(270deg, #0066ff, transparent); }

.msg-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.58rem; letter-spacing: 0.15em; margin-bottom: 4px;
}
.msg.ai .msg-label { color: var(--persona-color); transition: color 0.4s; }
.msg.user .msg-label { color: #4090ff; text-align: right; }

/* ─── COPY BUTTON ─── */
.copy-btn {
  align-self: flex-start;
  display: flex; align-items: center; gap: 5px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.52rem; letter-spacing: 0.1em;
  color: var(--text-dim);
  background: rgba(0,200,255,0.04);
  border: 1px solid rgba(10,58,90,0.6);
  padding: 3px 8px;
  cursor: pointer;
  border-radius: 1px;
  transition: all 0.2s;
  opacity: 0;
  pointer-events: none;
}
.msg.ai:hover .copy-btn,
.msg.ai .copy-btn.visible {
  opacity: 1;
  pointer-events: all;
}
.copy-btn:hover {
  border-color: var(--persona-color);
  color: var(--persona-color);
  background: rgba(0,200,255,0.08);
}
.copy-btn.copied {
  border-color: #00ff88;
  color: #00ff88;
  background: rgba(0,255,136,0.06);
}
.copy-btn svg { width: 10px; height: 10px; fill: currentColor; flex-shrink: 0; }

/* ─── MARKDOWN CONTENT ─── */
.bubble-content p { margin-bottom: 5px; }
.bubble-content p:last-child { margin-bottom: 0; }
.bubble-content code {
  font-family: 'Share Tech Mono', monospace; font-size: 0.8rem;
  background: rgba(0,200,255,0.06); border: 1px solid rgba(0,200,255,0.12);
  padding: 1px 5px; border-radius: 2px; color: #80e0ff;
}
.bubble-content pre {
  font-family: 'Share Tech Mono', monospace; font-size: 0.78rem;
  background: rgba(0,0,0,0.5); border: 1px solid rgba(0,200,255,0.1);
  padding: 10px 12px; border-radius: 2px; margin: 8px 0;
  overflow-x: auto; color: #80e0ff; line-height: 1.5;
}
.bubble-content strong { color: var(--persona-color); font-weight: 700; }
.bubble-content em { font-style: italic; color: #a0d0f0; }
.bubble-content h3 {
  font-family: 'Orbitron', monospace; font-size: 0.72rem;
  letter-spacing: 0.15em; color: var(--persona-color);
  margin: 8px 0 4px; text-transform: uppercase;
}
.bubble-content h1, .bubble-content h2 {
  font-family: 'Orbitron', monospace;
  letter-spacing: 0.1em; color: var(--persona-color);
  margin: 10px 0 5px;
}
.bubble-content h1 { font-size: 0.9rem; }
.bubble-content h2 { font-size: 0.8rem; }
.bubble-content ul, .bubble-content ol { padding-left: 16px; margin: 5px 0; }
.bubble-content li { margin-bottom: 2px; }
.bubble-content blockquote {
  border-left: 2px solid var(--persona-color);
  margin: 8px 0; padding: 6px 12px;
  background: rgba(0,200,255,0.03);
  color: var(--text-dim); font-style: italic;
}
.bubble-content hr {
  border: none; border-top: 1px solid var(--border);
  margin: 10px 0;
}

/* ─── TABLE STYLES ─── */
.bubble-content .table-wrap {
  overflow-x: auto;
  margin: 10px 0;
  border: 1px solid rgba(0,200,255,0.15);
  border-radius: 2px;
}
.bubble-content table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
}
.bubble-content table thead tr {
  background: rgba(0,200,255,0.08);
  border-bottom: 1px solid rgba(0,200,255,0.2);
}
.bubble-content table th {
  padding: 7px 12px;
  text-align: left;
  color: var(--persona-color);
  font-weight: 700;
  letter-spacing: 0.1em;
  white-space: nowrap;
  font-size: 0.65rem;
}
.bubble-content table td {
  padding: 6px 12px;
  color: var(--text);
  border-bottom: 1px solid rgba(10,58,90,0.4);
  vertical-align: top;
}
.bubble-content table tbody tr:hover { background: rgba(0,200,255,0.03); }
.bubble-content table tbody tr:last-child td { border-bottom: none; }

/* System notice */
.msg.system .bubble {
  background: rgba(0,200,255,0.04);
  border: 1px solid rgba(0,200,255,0.15);
  border-left: 2px solid var(--persona-color);
  max-width: 90%;
  margin: 0 auto;
}
.msg.system { justify-content: center; }
.msg.system .msg-label { color: var(--text-dim); }

/* Thinking dots */
.thinking {
  display: flex; align-items: center; gap: 5px;
  padding: 9px 13px;
  background: var(--ai-bubble);
  border: 1px solid rgba(0,200,255,0.1);
  border-left: 2px solid var(--persona-color);
  max-width: 110px; border-radius: 2px;
}
.think-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--persona-color);
  animation: thinkBounce 1.2s ease-in-out infinite;
}
.think-dot:nth-child(2) { animation-delay: 0.2s; }
.think-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes thinkBounce {
  0%,80%,100% { transform:scale(0.6); opacity:0.4; }
  40% { transform:scale(1); opacity:1; }
}

/* ─── FOOTER ─── */
footer {
  position: relative; z-index: 10;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  background: rgba(4,15,26,0.97);
  backdrop-filter: blur(20px);
  flex-shrink: 0;
}

/* ─── ATTACHED FILES PREVIEW ─── */
#attachPreview {
  display: none; flex-wrap: wrap; gap: 6px;
  margin-bottom: 8px;
}
#attachPreview.has-files { display: flex; }

.attach-chip {
  display: flex; align-items: center; gap: 6px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.58rem; letter-spacing: 0.06em;
  color: var(--persona-color);
  background: rgba(0,200,255,0.06);
  border: 1px solid rgba(0,200,255,0.25);
  padding: 4px 8px; border-radius: 1px;
  max-width: 180px;
}
.attach-chip-name {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  flex: 1;
}
.attach-chip-remove {
  flex-shrink: 0; cursor: pointer;
  color: var(--text-dim); font-size: 0.75rem;
  transition: color 0.2s; line-height: 1;
}
.attach-chip-remove:hover { color: var(--danger); }
.attach-chip-icon { font-size: 0.85rem; flex-shrink: 0; }

.input-row {
  display: flex; gap: 8px; align-items: flex-end;
  background: rgba(0,30,60,0.5);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 3px 3px 3px 14px;
  transition: border-color 0.2s;
}
.input-row:focus-within {
  border-color: var(--persona-color);
  box-shadow: 0 0 20px var(--persona-glow);
}
.input-row::before {
  content: '>';
  font-family: 'Share Tech Mono', monospace;
  color: var(--persona-color);
  font-size: 0.85rem; flex-shrink: 0;
  margin-bottom: 8px; opacity: 0.7;
  transition: color 0.4s;
}

textarea {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem; font-weight: 500;
  resize: none; min-height: 36px; max-height: 130px;
  line-height: 1.5; padding: 7px 0;
  caret-color: var(--persona-color);
}
textarea::placeholder {
  color: var(--text-dim);
  font-family: 'Share Tech Mono', monospace; font-size: 0.75rem;
}

/* Attach button */
.attach-btn {
  width: 38px; height: 38px;
  border-radius: 1px;
  background: rgba(0,200,255,0.06);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: all 0.2s;
  align-self: flex-end; margin-bottom: 1px;
  color: var(--text-dim);
}
.attach-btn:hover {
  border-color: var(--persona-color);
  color: var(--persona-color);
  background: rgba(0,200,255,0.1);
  box-shadow: 0 0 10px var(--persona-glow);
}
.attach-btn svg { width: 16px; height: 16px; fill: currentColor; }
.attach-btn.has-files { border-color: var(--persona-color); color: var(--persona-color); }

.send-btn {
  width: 38px; height: 38px;
  border-radius: 1px;
  background: linear-gradient(135deg, #0044aa, #0066ff);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: all 0.2s;
  align-self: flex-end; margin-bottom: 1px;
}
.send-btn:hover { background: linear-gradient(135deg, #0055cc, #0080ff); box-shadow: 0 0 16px rgba(0,100,255,0.4); transform: scale(1.05); }
.send-btn:active { transform: scale(0.97); }
.send-btn svg { width: 17px; height: 17px; fill: white; }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

#fileInput { display: none; }

/* ─── WELCOME ─── */
.welcome {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding: 30px 20px; gap: 14px;
  animation: fadeIn 1s ease;
}
@keyframes fadeIn { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
.welcome-icon { width: 70px; height: 70px; }
.welcome-icon svg { width: 100%; height: 100%; filter: drop-shadow(0 0 20px var(--persona-color)); }
.welcome h2 {
  font-family: 'Orbitron', monospace;
  font-size: 1.6rem; font-weight: 900;
  color: var(--persona-color); letter-spacing: 0.3em;
  text-shadow: 0 0 30px var(--persona-glow);
  transition: color 0.4s, text-shadow 0.4s;
}
.welcome .persona-subtitle {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem; color: var(--persona-color);
  letter-spacing: 0.15em; opacity: 0.8;
  transition: color 0.4s;
}
.welcome p.sys-txt {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem; color: var(--text-dim);
  letter-spacing: 0.1em; line-height: 1.8; max-width: 480px;
}
.welcome-caps { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-top: 6px; }
.cap {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.6rem; color: var(--persona-color);
  border: 1px solid rgba(0,200,255,0.25);
  padding: 3px 8px; letter-spacing: 0.1em;
  background: rgba(0,200,255,0.04);
  transition: color 0.4s, border-color 0.4s;
}

/* In-bubble file attachment display */
.attached-files-in-msg {
  display: flex; flex-wrap: wrap; gap: 4px;
  margin-bottom: 8px;
}
.file-badge {
  display: flex; align-items: center; gap: 4px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.54rem; letter-spacing: 0.05em;
  color: #4090ff;
  background: rgba(0,100,255,0.08);
  border: 1px solid rgba(0,100,255,0.2);
  padding: 2px 7px; border-radius: 1px;
}
.file-badge svg { width: 9px; height: 9px; fill: currentColor; flex-shrink: 0; }

/* Scanlines */
.scanlines {
  position: fixed; inset: 0; pointer-events: none; z-index: 100;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.04) 2px, rgba(0,0,0,0.04) 4px);
  opacity: 0.35;
}

.error-msg { color: var(--danger) !important; border-left-color: var(--danger) !important; }

@keyframes personaFlash {
  0% { opacity: 1; } 30% { opacity: 0.3; } 100% { opacity: 1; }
}
.persona-switching { animation: personaFlash 0.5s ease; }

/* ─── MOBILE ─── */
@media (max-width: 640px) {
  header { padding: 8px 12px; }
  .logo-icon { width: 28px; height: 28px; }
  .logo-text h1 { font-size: 0.9rem; letter-spacing: 0.2em; }
  .logo-text p { display: none; }
  .header-right { gap: 6px; }
  .status-item span { display: none; }
  .settings-btn { padding: 5px 8px; font-size: 0.56rem; gap: 4px; }
  .settings-btn span { display: none; }
  #settingsPanel { width: calc(100vw - 16px); right: 8px; }
  #messages { padding: 12px 10px; gap: 10px; }
  .msg { gap: 7px; }
  .avatar { width: 28px; height: 28px; font-size: 0.55rem; }
  .avatar.ai-avatar { font-size: 0.8rem; }
  .bubble-wrap { max-width: 88%; }
  .bubble { padding: 9px 11px; font-size: 0.97rem; line-height: 1.6; }
  .msg-label { font-size: 0.54rem; margin-bottom: 3px; }
  .bubble-content code { font-size: 0.76rem; }
  .bubble-content pre { font-size: 0.72rem; padding: 8px 10px; }
  .bubble-content h3 { font-size: 0.68rem; }
  .bubble-content table { font-size: 0.65rem; }
  .bubble-content table th, .bubble-content table td { padding: 5px 8px; }
  .welcome { padding: 18px 14px; gap: 10px; }
  .welcome-icon { width: 50px; height: 50px; }
  .welcome h2 { font-size: 1.25rem; letter-spacing: 0.2em; }
  .welcome .persona-subtitle { font-size: 0.65rem; }
  .welcome p.sys-txt { font-size: 0.62rem; }
  .cap { font-size: 0.54rem; padding: 2px 6px; }
  footer { padding: 8px 10px 10px; }
  .input-row { padding: 2px 2px 2px 10px; gap: 5px; }
  .input-row::before { font-size: 0.78rem; margin-bottom: 7px; }
  textarea { font-size: 0.97rem; min-height: 32px; padding: 6px 0; }
  .send-btn, .attach-btn { width: 34px; height: 34px; }
  .send-btn svg { width: 15px; height: 15px; }
  .attach-btn svg { width: 14px; height: 14px; }
  .copy-btn { font-size: 0.5rem; padding: 2px 6px; }
  .copy-btn { opacity: 1; pointer-events: all; } /* always visible on mobile */
}

@media (max-width: 380px) {
  .logo-text h1 { font-size: 0.82rem; }
  .bubble { font-size: 0.93rem; }
  .welcome h2 { font-size: 1.05rem; }
}