/* ── ThinkHere — Qanata Labs Brand Styles ── */

/* ── DARK THEME (default) ── */
[data-theme="dark"] {
  --bg:           #0c0c11;
  --bg-side:      #101015;
  --surface:      #17171e;
  --surface2:     #1e1e27;
  --border:       rgba(255,255,255,0.07);
  --border-md:    rgba(255,255,255,0.12);
  --text:         #f0f0f5;
  --text-muted:   #7a7a96;
  --text-dim:     #44445a;
  --input-bg:     #17171e;
  --pill-bg:      rgba(184,92,56,0.12);
  --pill-border:  rgba(184,92,56,0.28);
  --pill-text:    #c96a42;
  --pill2-bg:     rgba(255,255,255,0.04);
  --pill2-border: rgba(255,255,255,0.09);
  --pill2-text:   rgba(255,255,255,0.32);
  --topbar-bg:    rgba(12,12,17,0.8);
  --btn-ghost-bg: rgba(255,255,255,0.06);
  --btn-ghost-bd: rgba(255,255,255,0.13);
  --hero-h:       #f0f0f5;
  --hero-em:      #b85c38;
  --sidebar-glow: rgba(184,92,56,0.22);
  --orb1:         rgba(184,92,56,0.09);
  --orb2:         rgba(184,92,56,0.05);
  --shadow:       rgba(0,0,0,0.15);
  --accent:       #b85c38;
  --accent-dim:   #9a4a2d;
  --accent-glow:  rgba(184,92,56,0.10);
  --user-bg:      #1e1a16;
  --radius:       12px;
  --font-mono:    'DM Mono', monospace;
  --font-sans:    'Plus Jakarta Sans', system-ui, sans-serif;
}

/* ── LIGHT THEME ── */
[data-theme="light"] {
  --bg:           #f0f0f0;
  --bg-side:      #ffffff;
  --surface:      #ffffff;
  --surface2:     #e8e8e8;
  --border:       rgba(0,0,0,0.08);
  --border-md:    rgba(0,0,0,0.13);
  --text:         #1a1a1a;
  --text-muted:   #666666;
  --text-dim:     #aaaaaa;
  --input-bg:     #ffffff;
  --pill-bg:      rgba(184,92,56,0.08);
  --pill-border:  rgba(184,92,56,0.22);
  --pill-text:    #9e3f1a;
  --pill2-bg:     rgba(0,0,0,0.04);
  --pill2-border: rgba(0,0,0,0.1);
  --pill2-text:   #888888;
  --topbar-bg:    rgba(240,240,240,0.92);
  --btn-ghost-bg: rgba(0,0,0,0.05);
  --btn-ghost-bd: rgba(0,0,0,0.14);
  --hero-h:       #111820;
  --hero-em:      #b85c38;
  --sidebar-glow: rgba(184,92,56,0.15);
  --orb1:         rgba(184,92,56,0.06);
  --orb2:         rgba(184,92,56,0.03);
  --shadow:       rgba(0,0,0,0.08);
  --accent:       #b85c38;
  --accent-dim:   #9e3f1a;
  --accent-glow:  rgba(184,92,56,0.08);
  --user-bg:      #f5ede8;
  --radius:       12px;
  --font-mono:    'DM Mono', monospace;
  --font-sans:    'Plus Jakarta Sans', system-ui, sans-serif;
}

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

html,
body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  transition: background 0.25s, color 0.25s;
}

/* ── Layout: Sidebar + Main ── */
.app {
  display: flex;
  height: 100dvh;
  overflow: hidden;
}

/* ── Sidebar ── */
.sidebar {
  width: 258px;
  background: var(--bg-side);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 22px 14px 18px;
  flex-shrink: 0;
  position: relative;
  transition: background 0.25s;
}

.sidebar::after {
  content: '';
  position: absolute;
  top: 15%;
  right: 0;
  bottom: 15%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--sidebar-glow), transparent);
}

/* Logo block */
.logo-block {
  padding: 2px 8px 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.logo-product {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1;
  text-decoration: none;
  display: block;
}

a.logo-product:hover {
  opacity: 0.85;
}

.logo-parent {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 5px;
}

.logo-parent-text {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* New chat button */
.btn-new {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border-md);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
  text-align: left;
  margin-bottom: 4px;
}

.btn-new:hover {
  background: var(--surface2);
  color: var(--text);
}

.btn-new svg {
  opacity: 0.5;
  flex-shrink: 0;
}

/* Nav section */
.nav-section {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 4px;
}

.convo-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-radius: 7px;
  color: var(--text-muted);
  font-size: 13.5px;
  cursor: pointer;
  transition: all 0.14s;
  text-decoration: none;
  flex-shrink: 0;
}

.convo-item:hover {
  background: var(--surface2);
  color: var(--text);
}

.convo-item.active {
  background: var(--surface2);
  color: var(--text);
}

.convo-item svg {
  flex-shrink: 0;
  opacity: 0.5;
}

.convo-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Sidebar footer */
.sidebar-footer {
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex-shrink: 0;
}

.footer-note {
  padding: 2px 4px 2px;
  line-height: 1.5;
}

.footer-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #b85c38;
  display: block;
  margin-bottom: 5px;
}

.footer-body {
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

.pills {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pill {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 9px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  transition: all 0.15s;
}

.pill-a {
  background: var(--pill-bg);
  border-color: var(--pill-border);
  color: var(--pill-text);
}

.pill-b {
  background: var(--pill2-bg);
  border-color: var(--pill2-border);
  color: var(--pill2-text);
}

.btn-login {
  padding: 10px 12px;
  border-radius: 7px;
  background: #b85c38;
  border: none;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  text-align: center;
  text-decoration: none;
  display: block;
}

.btn-login:hover {
  background: #d4724e;
}

/* ── Main Content Area ── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background: var(--bg);
  transition: background 0.25s;
}

/* Background orbs */
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

.orb1 {
  width: 520px;
  height: 400px;
  background: radial-gradient(circle, var(--orb1) 0%, transparent 70%);
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
}

.orb2 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, var(--orb2) 0%, transparent 70%);
  bottom: 60px;
  right: 8%;
}

/* ── Topbar ── */
.topbar {
  position: relative;
  z-index: 10;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 20px;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  background: var(--topbar-bg);
  backdrop-filter: blur(12px);
  transition: background 0.25s;
  flex-shrink: 0;
}

/* Topbar nav links */
.topbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: auto;
}

.topbar-link {
  padding: 5px 12px;
  border-radius: 7px;
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.14s;
}

.topbar-link:hover {
  background: var(--surface2);
  color: var(--text);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  background: var(--surface2);
  border: 1px solid var(--border-md);
  border-radius: 20px;
  padding: 3px;
  margin-right: 6px;
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 16px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s;
}

.theme-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 4px var(--shadow);
}

.btn-top-ghost {
  padding: 7px 16px;
  border-radius: 20px;
  border: 1px solid var(--btn-ghost-bd);
  background: var(--btn-ghost-bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-top-ghost:hover {
  background: var(--surface2);
}

.btn-top-solid {
  padding: 7px 18px;
  border-radius: 20px;
  border: none;
  background: #b85c38;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-top-solid:hover {
  background: #d4724e;
}

.topbar-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.gh-stats {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: 8px;
}

.gh-stat {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: color 0.2s ease;
}

.gh-stat:hover {
  color: var(--accent);
}

.gh-stat svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

.github-link {
  color: var(--text-dim);
  transition: color 0.2s ease;
  display: flex;
  align-items: center;
}

.github-link:hover {
  color: var(--accent);
}

.github-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ── Inner content wrapper (scrollable area below topbar) ── */
.main-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

/* ── Intro Section ── */
.intro-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  gap: 20px;
  animation: fadeUp 0.55s ease both;
  text-align: center;
}

.intro-section h2 {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 3.8vw, 2.2rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--hero-h);
}

.intro-section h2 em {
  color: var(--hero-em);
  font-style: normal;
  font-weight: 600;
}

.intro-section p {
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.6;
  font-size: 0.92rem;
}

/* Eyebrow */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #b85c38;
  box-shadow: 0 0 8px rgba(184,92,56,0.5);
  animation: pulse 2.2s ease infinite;
}

.intro-section .start-btn {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 100px;
  padding: 14px 40px;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: all 0.2s ease;
  margin-top: 8px;
}

.intro-section .start-btn:hover {
  background: #d4724e;
  transform: translateY(-1px);
}

.intro-section .start-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* ── Device Banners ── */
.device-info-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
}

.device-info-bar .info-sep {
  color: var(--border-md);
}

.device-info-bar .info-ok {
  color: var(--accent);
}

.device-info-bar .info-warn {
  color: #d0a070;
}

.iphone-unsupported-banner {
  background: var(--surface);
  border: 1px solid var(--border-md);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 520px;
}

.iphone-unsupported-banner strong {
  color: var(--text);
  font-size: 0.95rem;
}

.webgpu-warning,
.browser-version-warning {
  background: rgba(184,92,56,0.06);
  border: 1px solid rgba(184,92,56,0.2);
  border-radius: var(--radius);
  padding: 16px 20px;
  max-width: 480px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.browser-version-warning {
  background: rgba(184,92,56,0.04);
  border-color: rgba(184,92,56,0.15);
  color: var(--text-muted);
}

.browser-version-warning code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
}

.network-error {
  background: rgba(184,92,56,0.06);
  border: 1px solid rgba(184,92,56,0.2);
  border-radius: var(--radius);
  padding: 20px 24px;
  max-width: 520px;
  text-align: left;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.network-error strong {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text);
}

.network-error code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
}

.network-error ul {
  margin: 8px 0;
  padding-left: 18px;
}

.network-error li {
  margin: 4px 0;
}

/* ── Loading Screen ── */
.loading-screen {
  display: none;
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 40px 24px;
  animation: fadeUp 0.6s ease;
}

.loading-screen.active {
  display: flex;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.loader-ring {
  width: 48px;
  height: 48px;
  border: 2px solid var(--border-md);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-model-name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--text-muted);
}

.loading-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.progress-bar-container {
  width: 300px;
  height: 4px;
  background: var(--surface);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  width: 0%;
  border-radius: 2px;
  transition: width 0.3s ease;
}

.loading-phases {
  display: flex;
  gap: 24px;
  margin-top: 4px;
}

.phase {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

.phase.active {
  color: var(--accent);
}

.phase.done {
  color: var(--accent-dim);
}

.phase-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border-md);
  flex-shrink: 0;
}

.phase.active .phase-dot {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: pulse 1.5s ease infinite;
}

.phase.done .phase-dot {
  background: var(--accent-dim);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.loading-stats {
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

.loading-tip {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-align: center;
  max-width: 380px;
  line-height: 1.5;
  margin-top: 8px;
  transition: opacity 0.3s ease;
}

/* ── Chat Container ── */
.chat-container {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.chat-container.active {
  display: flex;
}

/* ── Messages ── */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.messages::-webkit-scrollbar {
  width: 6px;
  background: transparent;
}

.messages::-webkit-scrollbar-track {
  background: transparent;
}

.messages::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 4px;
  transition: background 0.2s;
}

.messages:hover::-webkit-scrollbar-thumb {
  background: var(--border-md);
}

.message {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  line-height: 1.65;
  max-width: 85%;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message.system {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: transparent;
  padding: 8px;
  letter-spacing: 0.03em;
}

.message.user {
  align-self: flex-end;
  background: var(--user-bg);
  border: 1px solid rgba(184,92,56,0.12);
  color: var(--text);
}

.message.assistant {
  align-self: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

/* ── Markdown in assistant messages ── */
.message.assistant.rendered h1,
.message.assistant.rendered h2,
.message.assistant.rendered h3,
.message.assistant.rendered h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  margin: 16px 0 8px;
  color: var(--text);
}

.message.assistant.rendered h1 { font-size: 1.3rem; }
.message.assistant.rendered h2 { font-size: 1.1rem; }
.message.assistant.rendered h3 { font-size: 1rem; }

.message.assistant.rendered p {
  margin: 8px 0;
}

.message.assistant.rendered ul,
.message.assistant.rendered ol {
  padding-left: 20px;
  margin: 8px 0;
}

.message.assistant.rendered li {
  margin: 4px 0;
}

.message.assistant.rendered code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.message.assistant.rendered pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 12px 0;
}

.message.assistant.rendered pre code {
  background: transparent;
  padding: 0;
  font-size: 0.8rem;
  line-height: 1.5;
}

.message.assistant.rendered blockquote {
  border-left: 3px solid var(--accent-dim);
  padding-left: 14px;
  margin: 12px 0;
  color: var(--text-muted);
}

.message.assistant.rendered table {
  border-collapse: collapse;
  margin: 12px 0;
  width: 100%;
}

.message.assistant.rendered th,
.message.assistant.rendered td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  font-size: 0.82rem;
}

.message.assistant.rendered th {
  background: var(--surface2);
  font-weight: 500;
}

.message.assistant.rendered hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

.message.assistant.rendered a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.message-image {
  max-width: 200px;
  max-height: 200px;
  border-radius: 8px;
  margin-top: 6px;
  display: block;
}

/* ── Input Area ── */
.input-area {
  border-top: 1px solid var(--border);
  padding: 14px 24px 20px;
  flex-shrink: 0;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.attachment-preview {
  display: none;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.attachment-preview.active {
  display: flex;
}

.attachment-thumb {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.attachment-thumb img {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 4px;
}

.attachment-thumb .remove-attach {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: color 0.2s;
}

.attachment-thumb .remove-attach:hover {
  color: #e05050;
}

.input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.input-wrapper {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid var(--border-md);
  border-radius: var(--radius);
  padding: 0 14px;
  transition: border-color 0.2s;
}

.input-wrapper:focus-within {
  border-color: rgba(184,92,56,0.45);
  box-shadow: 0 0 0 3px rgba(184,92,56,0.1);
}

.input-wrapper textarea {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  resize: none;
  outline: none;
  padding: 12px 0;
  line-height: 1.5;
  max-height: 150px;
  caret-color: #b85c38;
}

.file-btn,
.send-btn,
.stop-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-md);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.file-btn:hover,
.send-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.send-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.send-btn svg,
.stop-btn svg,
.file-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.stop-btn {
  display: none;
  border-color: #e05050;
  color: #e05050;
}

.stop-btn.active {
  display: flex;
}

.stop-btn:hover {
  background: rgba(224, 80, 80, 0.1);
}

.multimodal-btns {
  display: none;
}

.multimodal-btns.active {
  display: flex;
  gap: 4px;
}

.mm-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-md);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.mm-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mm-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.input-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

.input-meta-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.input-meta-left span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.toolbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid transparent;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: all 0.2s;
}

.toolbar-btn:hover {
  color: var(--text-muted);
  border-color: var(--border);
  background: var(--surface);
}

.toolbar-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

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

.input-meta-right span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.token-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.token-bar-track {
  width: 60px;
  height: 3px;
  background: var(--surface2);
  border-radius: 2px;
  overflow: hidden;
}

.token-bar-fill {
  height: 100%;
  background: var(--accent-dim);
  width: 0%;
  border-radius: 2px;
  transition: width 0.3s ease;
}

.token-bar-fill.warn {
  background: #d0a070;
}

.token-bar-fill.danger {
  background: #e05050;
}

/* ── File Drop Overlay ── */
.file-drop-overlay {
  position: absolute;
  inset: 0;
  background: rgba(12, 12, 17, 0.9);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  z-index: 20;
  border: 2px dashed var(--accent-dim);
  border-radius: var(--radius);
}

.file-drop-overlay.active {
  display: flex;
}

.file-drop-overlay svg {
  width: 36px;
  height: 36px;
  fill: var(--accent-dim);
}

.file-drop-overlay span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-dim);
  letter-spacing: 0.03em;
}

/* ── Upgrade Banner ── */
.upgrade-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.upgrade-banner a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.upgrade-banner a:hover {
  text-decoration: underline;
}

/* ── Mobile sidebar toggle ── */
.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border-md);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  margin-right: auto;
}

.sidebar-toggle:hover {
  background: var(--surface2);
  color: var(--text);
}

.sidebar-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -260px;
    top: 0;
    bottom: 0;
    z-index: 100;
    transition: left 0.25s ease;
    box-shadow: none;
  }

  .sidebar.open {
    left: 0;
    box-shadow: 4px 0 24px var(--shadow);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
  }

  .sidebar-overlay.active {
    display: block;
  }

  .sidebar-toggle {
    display: flex;
  }

  .topbar {
    padding: 0 12px;
  }

  .gh-stats {
    display: none;
  }

  .messages {
    padding: 16px;
  }

  .input-area {
    padding: 12px 16px 20px;
  }

  .intro-section h2 {
    font-size: 1.5rem;
  }

  .message {
    max-width: 92%;
  }

  .device-info-bar {
    font-size: 0.6rem;
    gap: 6px;
    padding: 6px 12px;
  }

  .btn-top-ghost,
  .btn-top-solid {
    font-size: 12px;
    padding: 6px 12px;
  }
}

@media (max-width: 480px) {
  .theme-toggle {
    display: none;
  }
}