/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent:        #7C6DFA;
  --accent2:       #E879F9;
  --accent-glow:   rgba(124,109,250,0.3);
  --sidebar-w:     256px;
  --hdr-h:         52px;
  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     14px;
  --radius-xl:     20px;
  --ease:          cubic-bezier(0.4,0,0.2,1);
  --ease-spring:   cubic-bezier(0.34,1.56,0.64,1);
  --font-size:     13px;
}

/* Font size variants */
[data-font-size="sm"] { --font-size: 13px; }
[data-font-size="md"] { --font-size: 14px; }
[data-font-size="lg"] { --font-size: 16px; }
[data-mono="true"] body { font-family: 'JetBrains Mono', monospace !important; }

/* ── Dark Theme ───────────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg:         #111111;
  --bg-sb:      #0d0d0d;
  --bg-hover:   #1c1c1c;
  --bg-active:  #222222;
  --bg-input:   #1a1a1a;
  --bg-card:    #161616;
  --bg-msg-u:   #1e1e1e;
  --border:     rgba(255,255,255,0.06);
  --border-md:  rgba(255,255,255,0.10);
  --text-1:     #efefef;
  --text-2:     #888899;
  --text-3:     #444456;
  --error:      #f87171;
  --err-bg:     rgba(248,113,113,0.08);
  --glow-a:     rgba(124,109,250,0.09);
  --glow-b:     rgba(232,121,249,0.06);
  --sp-bg:      #0f0f0f;
  --code-bg:    #161b22;
}

/* ── Light Theme ──────────────────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:         #f7f7f8;
  --bg-sb:      #f0f0f1;
  --bg-hover:   #e8e8ea;
  --bg-active:  #e0e0e2;
  --bg-input:   #ffffff;
  --bg-card:    #ffffff;
  --bg-msg-u:   #ededef;
  --border:     rgba(0,0,0,0.07);
  --border-md:  rgba(0,0,0,0.12);
  --text-1:     #111111;
  --text-2:     #666677;
  --text-3:     #b0b0be;
  --error:      #dc2626;
  --err-bg:     rgba(220,38,38,0.06);
  --glow-a:     rgba(124,109,250,0.06);
  --glow-b:     rgba(232,121,249,0.04);
  --sp-bg:      #f5f5f6;
  --code-bg:    #f6f8fa;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text-1);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: var(--font-size);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

/* ── Screens ──────────────────────────────────────────────────────────────── */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 400;
  overflow: hidden;
}

.glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(90px);
  opacity: 0.8;
  animation: floatGlow 10s ease-in-out infinite alternate;
}
.glow-a { width: 520px; height: 520px; background: var(--glow-a); top: -140px; left: -120px; }
.glow-b { width: 420px; height: 420px; background: var(--glow-b); bottom: -100px; right: -100px; animation-delay: -4s; }

@keyframes floatGlow {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(24px,16px) scale(1.08); }
}

/* ── Login card ───────────────────────────────────────────────────────────── */



.login-card {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-xl);
  width: min(400px, calc(100vw - 32px));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 44px 36px 36px;
  box-shadow: 0 0 0 1px var(--border), 0 32px 72px rgba(0,0,0,0.2);
  animation: riseUp 0.4s var(--ease) both;
}

.brand-logo { animation: pulse 3s ease-in-out infinite; }

.logo-img{
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 50%;
}

@keyframes pulse {
  0%,100% { filter: drop-shadow(0 0 8px var(--accent-glow)); }
  50%      { filter: drop-shadow(0 0 20px var(--accent-glow)); }
}

.brand-name {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.6px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-sub { font-size: 13px; color: var(--text-2); text-align: center; }
.sep { width: 100%; height: 1px; background: var(--border); margin: 4px 0; }

.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 20px;
  background: var(--bg-input);
  color: var(--text-1);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, transform 0.13s var(--ease-spring);
}
.google-btn:hover { background: var(--bg-hover); transform: translateY(-1px); }
.google-btn:active { transform: scale(0.98); }
.google-btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.login-err {
  width: 100%;
  font-size: 12.5px;
  color: var(--error);
  background: var(--err-bg);
  border: 1px solid var(--error);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  text-align: center;
}

.login-terms { font-size: 11.5px; color: var(--text-3); text-align: center; }
.login-terms a { color: var(--text-2); text-underline-offset: 3px; text-decoration: none; }
.login-terms a:hover { color: var(--text-1); }

/* ── Setup card ───────────────────────────────────────────────────────────── */
.setup-card {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-xl);
  width: min(400px, calc(100vw - 32px));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 44px 36px 36px;
  box-shadow: 0 32px 72px rgba(0,0,0,0.2);
  animation: riseUp 0.4s var(--ease) both;
}
.setup-card h2 { font-size: 21px; font-weight: 700; letter-spacing: -0.3px; }
.setup-sub { font-size: 13px; color: var(--text-2); margin-top: -10px; }

.avatar-wrap {
  position: relative;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s var(--ease-spring);
}
.avatar-wrap:hover { transform: scale(1.04); }
.avatar-img { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border-md); display: block; }
.avatar-overlay {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
  font-size: 10.5px;
  color: white;
  font-weight: 500;
}
.avatar-wrap:hover .avatar-overlay { opacity: 1; }

.field { width: 100%; display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; font-weight: 500; color: var(--text-2); }
.field input {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-md);
  color: var(--text-1);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,109,250,0.15); }
.field input::placeholder { color: var(--text-3); }

.primary-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.13s var(--ease-spring);
  box-shadow: 0 4px 20px rgba(124,109,250,0.3);
}
.primary-btn:hover { opacity: 0.92; transform: translateY(-1px); }
.primary-btn:active { transform: scale(0.98); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ── App Layout ───────────────────────────────────────────────────────────── */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
  animation: riseUp 0.3s var(--ease) both;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-sb);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
  transition: transform 0.26s var(--ease);
  overflow: hidden;
}

.sb-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  height: var(--hdr-h);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sb-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14.5px;
  color: var(--text-1);
  letter-spacing: -0.2px;
}

.sb-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  margin: 6px 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-3);
  flex-shrink: 0;
  transition: border-color 0.15s;
}
.sb-search:focus-within { border-color: rgba(124,109,250,0.4); color: var(--text-2); }
.sb-search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-1);
  font-size: 12px;
  font-family: inherit;
}
.sb-search input::placeholder { color: var(--text-3); }
.sb-search-clear {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-3);
  display: flex;
  padding: 0;
}
.sb-search-clear:hover { color: var(--text-1); }

.sb-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 10px 12px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.sb-toggle-hidden {
  font-size: 10px;
  color: var(--text-2);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
  letter-spacing: 0;
  text-transform: none;
}
.sb-toggle-hidden:hover { color: var(--text-1); }

.sb-list {
  padding: 2px 6px 4px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--bg-hover) transparent;
}
.sb-list-main { flex: 1; overflow-y: auto; }
.sb-empty { font-size: 12px; color: var(--text-3); text-align: center; padding: 14px 0; }

.sb-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 8px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  position: relative;
}
.sb-item:hover { background: var(--bg-hover); color: var(--text-1); }
.sb-item.active { background: var(--bg-active); color: var(--text-1); font-weight: 500; }

.sb-item-dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--text-3);
  flex-shrink: 0;
  margin-top: 1px;
}
.sb-item-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.sb-item-edit {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  color: var(--text-1);
  font-size: 12.5px;
  font-family: inherit;
  font-weight: 500;
  outline: none;
  width: 100%;
}
.sb-item-menu {
  display: none;
  width: 22px; height: 22px;
  border-radius: 4px;
  border: none;
  background: none;
  color: var(--text-3);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.1s, color 0.1s;
}
.sb-item:hover .sb-item-menu { display: flex; }
.sb-item-menu:hover { background: var(--bg-active); color: var(--text-1); }

.sb-footer {
  border-top: 1px solid var(--border);
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.sb-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; border: 1.5px solid var(--border-md); flex-shrink: 0; }
.sb-user-info { flex: 1; min-width: 0; }
.sb-name { display: block; font-size: 12.5px; font-weight: 600; color: var(--text-1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-email { display: block; font-size: 10.5px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.sb-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
}
.sb-overlay.show { display: block; }

/* ── Icon Button ──────────────────────────────────────────────────────────── */
.icon-btn {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, color 0.12s, transform 0.12s var(--ease-spring);
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text-1); transform: scale(1.05); }
.icon-btn:active { transform: scale(0.94); }
.icon-btn.dimmed { color: var(--text-3); }

/* ── Chat Main ────────────────────────────────────────────────────────────── */
.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--bg); }

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  height: var(--hdr-h);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 12px;
}

.model-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-md);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-1);
  white-space: nowrap;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s, border-color 0.15s;
}
.model-pill:hover { background: var(--bg-hover); border-color: rgba(124,109,250,0.3); }

.model-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #22c55e;
  animation: ping 2s cubic-bezier(0,0,0.2,1) infinite;
  flex-shrink: 0;
}
@keyframes ping {
  0%,100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.5); }
  60%      { box-shadow: 0 0 0 5px rgba(34,197,94,0); }
}

.header-actions { display: flex; align-items: center; gap: 4px; }

/* ── Messages Container ───────────────────────────────────────────────────── */
.messages-container { flex: 1; overflow-y: auto; display: flex; flex-direction: column; }

/* ── Welcome ──────────────────────────────────────────────────────────────── */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 32px 24px;
  text-align: center;
  gap: 16px;
  overflow-y: auto;
  min-height: 100%;
}
.welcome-logo { animation: pulse 3.5s ease-in-out infinite; }
.welcome h1 { font-size: 22px; font-weight: 600; letter-spacing: -0.4px; }
.welcome p { font-size: 13.5px; color: var(--text-2); }

.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 580px; }
.chip {
  padding: 7px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-md);
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s, color 0.12s, border-color 0.12s, transform 0.12s var(--ease-spring);
}
.chip:hover { background: var(--bg-hover); color: var(--text-1); border-color: rgba(124,109,250,0.4); transform: translateY(-1px); }

/* ── Messages ─────────────────────────────────────────────────────────────── */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 0;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--bg-hover) transparent;
}
.messages::-webkit-scrollbar { width: 5px; }
.messages::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 10px; }

.msg-row { display: flex; padding: 4px 0; animation: msgIn 0.2s var(--ease) both; }
.msg-row.user { flex-direction: row-reverse; }

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

.msg-inner {
  max-width: min(680px, calc(100vw - 48px));
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
}

/* AI message */
.msg-row.ai .msg-inner {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: start;
}

.msg-ai-badge {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  overflow: hidden;
}

.msg-content-wrap { min-width: 0; }



.message-text {
  direction: auto;
  unicode-bidi: plaintext;
  text-align: left;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.msg-content { font-size: var(--font-size); line-height: 1.7; color: var(--text-1); }

/* User message */
.msg-row.user .msg-inner { display: flex; flex-direction: column; align-items: flex-end; }

.msg-user-bubble {
  background: var(--bg-msg-u);
  border: 1px solid var(--border);
  border-radius: var(--radius-md) var(--radius-md) 2px var(--radius-md);
  padding: 10px 14px;
  font-size: var(--font-size);
  line-height: 1.6;
  color: var(--text-1);
  max-width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-image-preview { margin-bottom: 8px; }
.msg-image-preview img, .msg-attached-img {
  max-width: 280px;
  max-height: 200px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border);
  display: block;
  margin-bottom: 4px;
}

.msg-time {
  font-size: 10px;
  color: var(--text-3);
  margin-top: 4px;
  display: block;
}
.msg-time.user-time { align-self: flex-end; }

.msg-actions { display: none; gap: 4px; margin-top: 6px; align-items: center; }
.msg-row.ai:hover .msg-actions { display: flex; }

.msg-action-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-3);
  cursor: pointer;
  font-family: inherit;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}
.msg-action-btn:hover { background: var(--bg-hover); color: var(--text-1); border-color: var(--border-md); }

/* ── Markdown ─────────────────────────────────────────────────────────────── */
.msg-content p { margin: 0 0 10px; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content h1,.msg-content h2,.msg-content h3,.msg-content h4 { font-weight: 600; margin: 16px 0 8px; color: var(--text-1); letter-spacing: -0.2px; }
.msg-content h1 { font-size: 1.25em; }
.msg-content h2 { font-size: 1.15em; }
.msg-content h3 { font-size: 1.05em; }
.msg-content ul,.msg-content ol { padding-left: 20px; margin: 8px 0; }
.msg-content li { margin: 3px 0; }
.msg-content blockquote { border-left: 3px solid var(--accent); padding-left: 14px; margin: 10px 0; color: var(--text-2); font-style: italic; }
.msg-content strong { color: var(--text-1); font-weight: 600; }
.msg-content em { color: var(--text-2); }
.msg-content a { color: var(--accent); text-underline-offset: 3px; }
.msg-content a:hover { opacity: 0.8; }
.msg-content hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.msg-content table { border-collapse: collapse; width: 100%; margin: 10px 0; font-size: 13px; }
.msg-content th,.msg-content td { border: 1px solid var(--border-md); padding: 7px 12px; text-align: left; }
.msg-content th { background: var(--bg-hover); font-weight: 600; }
.msg-content code {
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.88em;
  background: var(--bg-hover);
  padding: 1px 6px;
  border-radius: 4px;
  color: #e879f9;
}
.msg-content pre {
  background: var(--code-bg) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 12px 0;
}
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-3);
  font-family: 'JetBrains Mono', monospace;
}
[data-theme="light"] .code-block-header { background: rgba(0,0,0,0.04); }
.code-copy-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 11px;
  font-family: inherit;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.1s, background 0.1s;
}
.code-copy-btn:hover { color: var(--text-1); background: var(--bg-hover); }
.msg-content pre code {
  background: transparent !important;
  padding: 14px !important;
  display: block;
  color: inherit;
  border-radius: 0;
  font-size: 12.5px;
  line-height: 1.65;
  overflow-x: auto;
}

/* ── Typing indicator ─────────────────────────────────────────────────────── */
.typing-dots { display: flex; gap: 5px; align-items: center; padding: 10px 0; }
.typing-dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-3);
  animation: bounce 1.1s ease-in-out infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.18s; }
.typing-dots span:nth-child(3) { animation-delay: 0.36s; }
@keyframes bounce {
  0%,80%,100% { transform: translateY(0); opacity: 0.5; }
  40%          { transform: translateY(-6px); opacity: 1; }
}

.stream-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  border-radius: 1px;
  animation: blink 0.8s step-start infinite;
  margin-left: 1px;
}
@keyframes blink { 50% { opacity: 0; } }

/* ── Input Area ───────────────────────────────────────────────────────────── */
.input-area { padding: 12px 24px 16px; flex-shrink: 0; }

.input-image-preview {
  max-width: 740px;
  margin: 0 auto 8px;
  position: relative;
  display: inline-flex;
}
.input-image-preview img {
  max-width: 120px; max-height: 80px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border-md);
  display: block;
}
.input-image-remove {
  position: absolute;
  top: -6px; right: -6px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--bg-hover);
  border: 1px solid var(--border-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: background 0.1s;
}
.input-image-remove:hover { background: var(--err-bg); color: var(--error); }

.input-box {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-lg);
  padding: 10px;
  transition: border-color 0.15s, box-shadow 0.15s;
  max-width: 740px;
  margin: 0 auto;
}
.input-box:focus-within {
  border-color: rgba(124,109,250,0.5);
  box-shadow: 0 0 0 3px rgba(124,109,250,0.1);
}

.attach-btn { color: var(--text-3); flex-shrink: 0; }
.attach-btn:hover { color: var(--accent); }

.input-box textarea {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  resize: none;
  color: var(--text-1);
  font-size: var(--font-size);
  font-family: inherit;
  line-height: 1.55;
  max-height: 200px;
  scrollbar-width: none;
  padding: 2px 0;
  overflow-y: auto;
}
.input-box textarea::placeholder { color: var(--text-3); }

.input-actions { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

.char-count { font-size: 10.5px; font-family: 'JetBrains Mono', monospace; flex-shrink: 0; color: var(--text-3); }

.send-btn {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  transition: opacity 0.15s, transform 0.13s var(--ease-spring);
  flex-shrink: 0;
}
.send-btn:hover { opacity: 0.88; transform: scale(1.06); }
.send-btn:active { transform: scale(0.94); }
.send-btn:disabled { background: var(--bg-hover); color: var(--text-3); cursor: not-allowed; opacity: 1; transform: none; }

.stop-btn {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-md);
  background: var(--bg-hover);
  color: var(--text-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.12s, color 0.12s;
  flex-shrink: 0;
  animation: pulseStop 1.5s ease-in-out infinite;
}
.stop-btn:hover { background: rgba(248,113,113,0.12); color: var(--error); border-color: var(--error); }
@keyframes pulseStop {
  0%,100% { box-shadow: none; }
  50%      { box-shadow: 0 0 0 3px rgba(248,113,113,0.15); }
}

.input-hint { text-align: center; font-size: 11px; color: var(--text-3); margin-top: 8px; max-width: 740px; margin-left: auto; margin-right: auto; }

/* ── Settings Panel ───────────────────────────────────────────────────────── */
.settings-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 200;
  backdrop-filter: blur(2px);
}

.settings-panel {
  position: fixed;
  top: 0; right: -360px;
  width: 340px; height: 100%;
  background: var(--sp-bg);
  border-left: 1px solid var(--border-md);
  z-index: 300;
  display: flex;
  flex-direction: column;
  transition: right 0.28s var(--ease);
  box-shadow: -12px 0 40px rgba(0,0,0,0.15);
}
.settings-panel.open { right: 0; }

.sp-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sp-header h3 { font-size: 14px; font-weight: 600; color: var(--text-1); }

.sp-body {
  flex: 1; overflow-y: auto;
  padding: 16px 18px 24px;
  scrollbar-width: thin;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.sp-section { display: flex; flex-direction: column; gap: 10px; }
.sp-section-title {
  font-size: 11.5px; font-weight: 600;
  color: var(--text-2); letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex; align-items: center; justify-content: space-between;
}
.sp-value { font-weight: 500; color: var(--accent); font-size: 11.5px; letter-spacing: 0; text-transform: none; }

.sp-select {
  width: 100%; padding: 9px 32px 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-md);
  color: var(--text-1);
  font-size: 13px; font-family: inherit;
  outline: none; cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888899' stroke-width='2.5' stroke-linecap='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: border-color 0.15s;
}
.sp-select:focus { border-color: var(--accent); }

.sp-range {
  width: 100%; appearance: none;
  height: 4px; border-radius: 2px;
  background: var(--bg-hover); outline: none; cursor: pointer;
}
.sp-range::-webkit-slider-thumb {
  appearance: none; width: 16px; height: 16px;
  border-radius: 50%; background: var(--accent); cursor: pointer;
  box-shadow: 0 0 0 3px rgba(124,109,250,0.2);
  transition: box-shadow 0.15s;
}
.sp-range::-webkit-slider-thumb:hover { box-shadow: 0 0 0 5px rgba(124,109,250,0.25); }
.sp-range-labels { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--text-3); }

.sp-textarea {
  width: 100%; padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-md);
  color: var(--text-1); font-size: 12.5px; font-family: inherit;
  line-height: 1.55; outline: none; resize: vertical; min-height: 90px;
  transition: border-color 0.15s;
}
.sp-textarea:focus { border-color: var(--accent); }
.sp-textarea::placeholder { color: var(--text-3); }

.sp-row { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-1); }

.toggle { position: relative; display: inline-flex; width: 38px; height: 22px; cursor: pointer; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  border-radius: 999px;
  background: var(--bg-hover);
  transition: background 0.2s;
  border: 1px solid var(--border-md);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--text-3);
  top: 2px; left: 2px;
  transition: transform 0.2s var(--ease-spring), background 0.2s;
}
.toggle input:checked + .toggle-slider { background: rgba(124,109,250,0.25); border-color: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(16px); background: var(--accent); }

.sp-font-btns { display: flex; gap: 4px; }
.font-btn {
  width: 30px; height: 26px;
  border: 1px solid var(--border-md);
  border-radius: var(--radius-sm);
  background: none; color: var(--text-2);
  font-family: inherit; font-size: 12px; font-weight: 500;
  cursor: pointer;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}
.font-btn:hover { background: var(--bg-hover); color: var(--text-1); }
.font-btn.active { background: rgba(124,109,250,0.15); border-color: var(--accent); color: var(--accent); }

.sp-danger-btn {
  padding: 9px 14px;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: var(--radius-md);
  color: var(--error); font-size: 12.5px; font-family: inherit;
  cursor: pointer; width: 100%;
  transition: background 0.12s, border-color 0.12s;
}
.sp-danger-btn:hover { background: rgba(248,113,113,0.14); border-color: rgba(248,113,113,0.5); }

.sp-footer-note { font-size: 11px; color: var(--text-3); text-align: center; padding-top: 8px; }

/* ── Context Menu ─────────────────────────────────────────────────────────── */
.ctx-menu {
  position: fixed;
  background: var(--bg-card);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-md);
  padding: 5px; z-index: 500;
  min-width: 160px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  animation: ctxIn 0.12s var(--ease) both;
}
@keyframes ctxIn {
  from { opacity: 0; transform: scale(0.96) translateY(-4px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.ctx-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 8px 10px;
  background: none; border: none;
  border-radius: var(--radius-sm);
  font-size: 12.5px; color: var(--text-1);
  cursor: pointer; font-family: inherit; text-align: left;
  transition: background 0.1s;
}
.ctx-item:hover { background: var(--bg-hover); }
.ctx-item.ctx-danger { color: var(--error); }
.ctx-item.ctx-danger:hover { background: rgba(248,113,113,0.08); }

/* ── Loading Spinner ──────────────────────────────────────────────────────── */
.loading-spinner {
  width: 28px; height: 28px;
  border: 2px solid var(--border-md);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Animations ───────────────────────────────────────────────────────────── */
@keyframes riseUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── hljs light theme override ────────────────────────────────────────────── */
[data-theme="light"] .hljs { background: var(--code-bg) !important; color: #24292e; }
[data-theme="light"] .hljs-comment,.hljs-prolog { color: #6a737d; font-style: italic; }
[data-theme="light"] .hljs-keyword,.hljs-atrule { color: #d73a49; }
[data-theme="light"] .hljs-string,.hljs-attr-value { color: #032f62; }
[data-theme="light"] .hljs-function,.hljs-class .hljs-title { color: #6f42c1; }
[data-theme="light"] .hljs-number,.hljs-boolean { color: #005cc5; }
[data-theme="light"] .hljs-variable,.hljs-regex { color: #e36209; }

/* ── Mobile ───────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    z-index: 100;
  }
  .sidebar.open { transform: translateX(0); }
  .input-area { padding: 10px 14px 14px; }
  .msg-inner { padding: 0 16px; }
  .input-box { max-width: 100%; }
}