/* ============================================================
   LeadPac — Chat de Teste | Design System
   ============================================================ */

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

:root {
  /* Palette – dark mode */
  --bg-base: #0a0e17;
  --bg-surface: #111827;
  --bg-elevated: #1a2235;
  --bg-hover: #1f2a3f;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Accent gradient */
  --accent-from: #6ee7b7;
  --accent-to: #3b82f6;
  --accent-gradient: linear-gradient(135deg, var(--accent-from), var(--accent-to));
  --accent-solid: #6ee7b7;

  /* Bubble colors */
  --bubble-user: linear-gradient(135deg, #1e40af, #3b82f6);
  --bubble-bot: var(--bg-elevated);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.5);
  --shadow-glow: 0 0 24px rgba(110, 231, 183, .12);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Sizing */
  --sidebar-width: 260px;
  --topbar-height: 64px;

  /* Transitions */
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);

  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* --- App Layout --- */
.app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  transition: transform var(--transition-base);
  z-index: 100;
}

.sidebar-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 8px rgba(110, 231, 183, .25));
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* Nav */
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 8px 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.nav-item:hover:not(.disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(110, 231, 183, 0.08);
  color: var(--accent-solid);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
}

.nav-item.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.badge {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(110, 231, 183, 0.15);
  color: var(--accent-solid);
}

.badge-muted {
  background: rgba(100, 116, 139, 0.15);
  color: var(--text-muted);
}

/* Sidebar footer */
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-subtle);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 6px rgba(245, 158, 11, .5);
  animation: pulse-dot 2s ease-in-out infinite;
}

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

/* ============================================================
   Main Area
   ============================================================ */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}

/* Top Bar */
.topbar {
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 50;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.topbar-info {
  flex: 1;
}

.topbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.topbar-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  gap: 4px;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ============================================================
   Chat Area
   ============================================================ */
.chat-area {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  scroll-behavior: smooth;
}

/* Custom scrollbar */
.chat-area::-webkit-scrollbar {
  width: 6px;
}
.chat-area::-webkit-scrollbar-track {
  background: transparent;
}
.chat-area::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
}
.chat-area::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.15);
}

/* --- Welcome State --- */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 100%;
  padding: 40px 20px;
  animation: fadeUp 600ms var(--ease-out) both;
}

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

.welcome-icon {
  margin-bottom: 24px;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.welcome-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-text {
  max-width: 480px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.welcome-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.welcome-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-default);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.chip:hover {
  border-color: rgba(110, 231, 183, 0.3);
  background: rgba(110, 231, 183, 0.06);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* --- Messages --- */
.messages {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}

.message {
  display: flex;
  gap: 12px;
  animation: msgIn 350ms var(--ease-out) both;
}

@keyframes msgIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

.message-avatar {
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 2px;
}

.message.bot .message-avatar {
  background: var(--accent-gradient);
  color: #0a0e17;
  box-shadow: 0 0 12px rgba(110, 231, 183, .2);
}

.message.user .message-avatar {
  background: var(--bubble-user);
  color: white;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.92rem;
  line-height: 1.65;
  position: relative;
}

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

.message-bubble a:hover {
  color: var(--accent-to);
}

.bubble-wrap {
  display: flex;
  flex-direction: column;
  max-width: 75%;
}

.message.user .bubble-wrap {
  align-items: flex-end;
}

.message-header {
  display: flex;
  flex-direction: column;
  margin-bottom: 4px;
  padding-left: 2px;
  line-height: 1.2;
}

.bot-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.bot-role {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.message.bot .message-bubble {
  background: var(--bubble-bot);
  color: var(--text-primary);
  border-top-left-radius: 4px;
  border-bottom-left-radius: 4px;
  border: 1px solid var(--border-subtle);
}

.message.user .message-bubble {
  background: var(--bubble-user);
  color: white;
  border-bottom-right-radius: 4px;
}

.message-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.message.user .message-time {
  text-align: right;
  color: rgba(255, 255, 255, 0.5);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 4px 0;
}

.typing-indicator span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typingBounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

/* ============================================================
   Input Area
   ============================================================ */
.input-area {
  padding: 16px 24px 20px;
  background: linear-gradient(to top, var(--bg-base) 60%, transparent);
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 8px 8px 8px 16px;
  transition: all var(--transition-fast);
}

.input-wrapper:focus-within {
  border-color: rgba(110, 231, 183, 0.4);
  box-shadow: 0 0 0 3px rgba(110, 231, 183, 0.08), var(--shadow-md);
}

.input-tools {
  display: flex;
  gap: 4px;
  align-items: center;
  padding-bottom: 2px;
}

.tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.tool-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.tool-btn.recording {
  color: #ef4444;
  animation: pulse-recording 1.5s infinite;
}

@keyframes pulse-recording {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  70% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.textarea-container {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.attachment-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  padding: 4px 8px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--accent-solid);
}

.attachment-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 150px;
}

.remove-attachment {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  margin-left: auto;
}

.remove-attachment:hover {
  color: #ef4444;
}

.message-input {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.92rem;
  line-height: 1.5;
  resize: none;
  padding: 6px 0;
  max-height: 120px;
  outline: none;
}

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

.send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: var(--radius-md);
  border: none;
  background: var(--accent-gradient);
  color: #0a0e17;
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0.4;
  transform: scale(0.92);
}

.send-btn:not(:disabled) {
  opacity: 1;
  transform: scale(1);
}

.send-btn:not(:disabled):hover {
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}

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

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

.input-hint {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 10px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

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

  .menu-toggle {
    display: flex;
  }

  .chat-area {
    padding: 16px;
  }

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

  .message-bubble {
    max-width: 85%;
  }

  .welcome-chips {
    flex-direction: column;
    align-items: center;
  }
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 99;
  animation: fadeIn 200ms ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}