/* ═══════════════════════════════════════════════════════════════
   JARVIS CHAT — Estilos Principais
   Design: Dark Theme inspirado em interfaces de alta tecnologia
   ═══════════════════════════════════════════════════════════════ */

/* ── RESET E BASE ──────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Paleta de cores principal */
  --color-bg:           #0a0e17;
  --color-bg-2:         #0f1420;
  --color-surface:      #141928;
  --color-surface-2:    #1a2035;
  --color-surface-3:    #212840;
  --color-border:       #1e2a42;
  --color-border-light: #2a3a58;

  /* Cores de destaque (azul elétrico do Jarvis) */
  --color-accent:       #00c2ff;
  --color-accent-2:     #0090cc;
  --color-accent-glow:  rgba(0, 194, 255, 0.15);
  --color-accent-hover: #33d0ff;

  /* Cores secundárias */
  --color-purple:       #7c5cbf;
  --color-purple-light: #a07dd9;
  --color-green:        #00e5b0;
  --color-green-dim:    rgba(0, 229, 176, 0.15);
  --color-red:          #ff4d6d;
  --color-red-dim:      rgba(255, 77, 109, 0.15);
  --color-yellow:       #f5c842;
  --color-yellow-dim:   rgba(245, 200, 66, 0.15);

  /* Texto */
  --text-primary:   #e8eaf2;
  --text-secondary: #8b98b5;
  --text-muted:     #4a5568;
  --text-accent:    #00c2ff;

  /* Tipografia */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Tamanhos */
  --sidebar-width:    280px;
  --header-height:    64px;
  --input-area-height: 96px;
  --border-radius:    12px;
  --border-radius-sm: 6px;
  --border-radius-lg: 18px;

  /* Transições */
  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:   0.4s ease;

  /* Sombras */
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.5);
  --shadow-accent: 0 0 20px rgba(0, 194, 255, 0.2);
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── LAYOUT PRINCIPAL ──────────────────────────────────────── */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background: var(--color-bg);
}

/* ═══════════════════════════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--color-bg-2);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  overflow-y: auto;
  transition: transform var(--transition-normal);
  z-index: 100;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }

/* ── Header da Sidebar ─────────────────────────────────────── */
.sidebar-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

/* Avatar do agente */
.agent-avatar {
  position: relative;
  width: 50px;
  height: 50px;
  flex-shrink: 0;
}

.avatar-ring {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  opacity: 0.6;
  animation: ring-rotate 8s linear infinite;
}

.avatar-core {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-surface-2), var(--color-surface-3));
  border: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  position: relative;
  z-index: 1;
}

.avatar-core svg {
  width: 22px;
  height: 22px;
}

.avatar-core.large {
  width: 90px;
  height: 90px;
  border-radius: 50%;
}

.avatar-core.large svg {
  width: 38px;
  height: 38px;
}

.avatar-pulse {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-glow), transparent 70%);
  animation: pulse-glow 3s ease-in-out infinite;
  z-index: 0;
}

@keyframes ring-rotate {
  0%   { transform: rotate(0deg); border-color: var(--color-accent); }
  50%  { border-color: var(--color-purple-light); }
  100% { transform: rotate(360deg); border-color: var(--color-accent); }
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50%       { opacity: 0.7; transform: scale(1.15); }
}

.agent-info { flex: 1; }

.agent-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--color-accent);
  text-shadow: 0 0 15px rgba(0, 194, 255, 0.5);
  line-height: 1;
}

.agent-subtitle {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 3px;
}

/* ── Status do Sistema ──────────────────────────────────────── */
.system-status {
  padding: 20px;
  border-bottom: 1px solid var(--color-border);
}

.status-title,
.config-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background var(--transition-normal);
}

.status-dot.status-checking { background: var(--color-yellow); animation: blink 1.5s infinite; }
.status-dot.status-ok       { background: var(--color-green); box-shadow: 0 0 6px var(--color-green); }
.status-dot.status-error    { background: var(--color-red); }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.status-label {
  flex: 1;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-value {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Configurações ──────────────────────────────────────────── */
.sidebar-config {
  padding: 20px;
  border-bottom: 1px solid var(--color-border);
}

.config-item {
  margin-bottom: 14px;
}

.config-label {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.config-select {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  padding: 7px 10px;
  font-size: 12px;
  font-family: var(--font-main);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238b98b5' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.config-select:hover,
.config-select:focus {
  border-color: var(--color-accent-2);
  outline: none;
}

.config-slider {
  width: 100%;
  appearance: none;
  height: 4px;
  background: var(--color-surface-3);
  border-radius: 4px;
  cursor: pointer;
  outline: none;
}

.config-slider::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(0, 194, 255, 0.5);
}

/* ── Ações da Sidebar ───────────────────────────────────────── */
.sidebar-actions {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}

.btn-action {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-action svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.btn-action:hover {
  background: var(--color-red-dim);
  border-color: var(--color-red);
  color: var(--color-red);
}

/* ── Provider Badge ─────────────────────────────────────────── */
.provider-badge {
  margin: auto 20px 0;
  padding: 10px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.provider-icon { font-size: 13px; }

/* ═══════════════════════════════════════════════════════════════
   ÁREA PRINCIPAL DO CHAT
   ═══════════════════════════════════════════════════════════════ */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--color-bg);
}

/* ── Header do Chat ─────────────────────────────────────────── */
.chat-header {
  height: var(--header-height);
  background: var(--color-bg-2);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  flex-shrink: 0;
}

.btn-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast);
}

.btn-menu-toggle svg {
  width: 20px;
  height: 20px;
  display: block;
}

.btn-menu-toggle:hover { color: var(--text-primary); }

.chat-header-info { flex: 1; }

.chat-header-title {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.online-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 8px var(--color-green);
  flex-shrink: 0;
  animation: pulse-glow 2s ease-in-out infinite;
}

.chat-header-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 1px;
}

.chat-header-meta { margin-left: auto; }

.msg-counter {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--color-surface);
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
}

/* ── Área de Mensagens ──────────────────────────────────────── */
/* Força o container de mensagens a ser o ponto de referência */
.messages-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex; /* Adicionado */
    flex-direction: column; /* Adicionado */
    position: relative; /* Essencial para o absolute funcionar */
    min-height: 0; 
}

/* Centralização absoluta do Welcome Screen */
.welcome-screen {
    margin: auto; /* Truque do Flexbox para centralizar se for o único item */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 600px;
    width: 100%;
    animation: fadeIn 0.8s ease-out;
}

.welcome-avatar {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

/* Estilo das sugestões para garantir o grid */
.quick-suggestions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 2rem;
    width: 100%;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-avatar {
  position: relative;
  width: 100px;
  height: 100px;
  margin-bottom: 28px;
}

.welcome-avatar .avatar-ring {
  inset: -5px;
  border-width: 2px;
}

.welcome-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.welcome-desc {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 460px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.quick-suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  max-width: 560px;
  width: 100%;
}

.suggestion-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 12px 16px;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font-main);
  cursor: pointer;
  text-align: left;
  line-height: 1.4;
  transition: all var(--transition-fast);
}

.suggestion-btn:hover {
  background: var(--color-surface-2);
  border-color: var(--color-accent-2);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ── Mensagens ─────────────────────────────────────────────── */
.message-wrapper {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  animation: message-in 0.3s ease;
}

@keyframes message-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.message-wrapper.user {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  margin-top: 2px;
}

.message-wrapper.assistant .message-avatar {
  background: linear-gradient(135deg, var(--color-accent-2), var(--color-purple));
  color: white;
  box-shadow: 0 0 10px rgba(0, 194, 255, 0.25);
}

.message-wrapper.user .message-avatar {
  background: var(--color-surface-3);
  color: var(--text-secondary);
  border: 1px solid var(--color-border);
}

.message-content {
  max-width: 72%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.message-wrapper.user .message-content {
  align-items: flex-end;
}

.message-sender {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.3px;
  padding: 0 4px;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: var(--border-radius-lg);
  font-size: 14px;
  line-height: 1.7;
  word-break: break-word;
  position: relative;
}

/* Bolha do usuário */
.message-wrapper.user .message-bubble {
  background: linear-gradient(135deg, var(--color-accent-2), #005f8f);
  color: white;
  border-bottom-right-radius: 4px;
  box-shadow: 0 2px 12px rgba(0, 144, 204, 0.3);
}

/* Bolha do Jarvis */
.message-wrapper.assistant .message-bubble {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

/* Meta da mensagem (tempo + modelo) */
.message-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  color: var(--text-muted);
  padding: 0 4px;
}

.message-wrapper.user .message-meta {
  justify-content: flex-end;
}

.meta-provider {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 1px 7px;
  font-size: 9px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-weight: 600;
}

.meta-provider.groq  { color: #74d7c4; border-color: rgba(116,215,196,0.3); }
.meta-provider.gemini  { color: #a07dd9; border-color: rgba(160,125,217,0.3); }

.meta-fallback {
  color: var(--color-yellow);
  font-size: 9px;
}

/* ── Markdown dentro das bolhas ──────────────────────────── */
.message-bubble p { margin-bottom: 8px; }
.message-bubble p:last-child { margin-bottom: 0; }

.message-bubble h1, .message-bubble h2, .message-bubble h3 {
  margin: 12px 0 6px;
  color: var(--text-primary);
}

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

.message-bubble li { margin-bottom: 4px; }

.message-bubble code {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
}

.message-bubble pre {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 12px 14px;
  overflow-x: auto;
  margin: 8px 0;
}

.message-bubble pre code {
  background: none;
  border: none;
  padding: 0;
  color: #a8c7fa;
  font-size: 12px;
}

.message-bubble blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
  margin: 8px 0;
  color: var(--text-secondary);
  font-style: italic;
}

.message-bubble table {
  border-collapse: collapse;
  width: 100%;
  margin: 8px 0;
  font-size: 12px;
}

.message-bubble th, .message-bubble td {
  border: 1px solid var(--color-border);
  padding: 6px 10px;
  text-align: left;
}

.message-bubble th {
  background: var(--color-surface-2);
  color: var(--text-primary);
  font-weight: 600;
}

.message-bubble strong { color: var(--text-primary); font-weight: 600; }
.message-bubble em { color: var(--text-secondary); }

/* ── Indicador de Digitação ─────────────────────────────── */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 24px 4px;
  animation: fade-in 0.2s ease;
}

.typing-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-2), var(--color-purple));
  color: white;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.typing-dots {
  display: flex;
  gap: 4px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 8px 14px;
}

.typing-dots span {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: dot-bounce 1.4s ease-in-out infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.5; }
  40%           { transform: translateY(-6px); opacity: 1; }
}

.typing-text {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Área de Input ──────────────────────────────────────── */
.input-area {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  padding: 14px 24px 10px;
  flex-shrink: 0;
}

.input-container {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 10px 12px 10px 16px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-container:focus-within {
  border-color: var(--color-accent-2);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.message-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  line-height: 1.6;
  resize: none;
  max-height: 120px;
  overflow-y: auto;
  scrollbar-width: thin;
}

.message-input::placeholder { color: var(--text-muted); }

.input-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.char-counter {
  font-size: 10px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 50px;
  text-align: right;
}

.char-counter.warning { color: var(--color-yellow); }
.char-counter.danger  { color: var(--color-red); }

/* Botão de envio */
.send-button {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-accent-2), #005f8f);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.send-button:disabled {
  background: var(--color-surface-3);
  color: var(--text-muted);
  cursor: not-allowed;
}

.send-button:not(:disabled):hover {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  transform: scale(1.05);
  box-shadow: 0 0 12px rgba(0, 194, 255, 0.4);
}

.send-button:not(:disabled):active { transform: scale(0.95); }

.send-button svg {
  width: 16px;
  height: 16px;
}

.send-button .loading-icon {
  animation: spin 1s linear infinite;
}

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

.input-footer {
  margin-top: 6px;
  display: flex;
  justify-content: flex-end;
}

.input-hint {
  font-size: 10px;
  color: var(--text-muted);
}

.input-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  font-size: 9px;
  font-family: var(--font-mono);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--text-secondary);
}

/* ═══════════════════════════════════════════════════════════════
   NOTIFICAÇÕES TOAST
   ═══════════════════════════════════════════════════════════════ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 13px;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  pointer-events: all;
  animation: toast-in 0.3s ease;
  max-width: 320px;
}

.toast.toast-success { border-left: 3px solid var(--color-green); }
.toast.toast-error   { border-left: 3px solid var(--color-red); }
.toast.toast-warn    { border-left: 3px solid var(--color-yellow); }
.toast.toast-info    { border-left: 3px solid var(--color-accent); }

.toast.toast-out { animation: toast-out 0.3s ease forwards; }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(20px); }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVIDADE
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 260px;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 99;
  }

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

  .btn-menu-toggle { display: flex; }

  .messages-area { padding: 16px; }
  .input-area { padding: 10px 16px 8px; }
  .chat-header { padding: 0 16px; }

  .message-content { max-width: 86%; }

  .quick-suggestions {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .agent-name { font-size: 17px; }
  .welcome-title { font-size: 20px; }
  .welcome-desc { font-size: 13px; }
  .message-bubble { font-size: 13px; }
  .chat-header-title { font-size: 14px; }
  .msg-counter { display: none; }
}

/* ── Scroll smooth ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}