:root {
    --color-primary: #0ea5e9;
    --color-primary-hover: #0284c7;
    --color-primary-foreground: #ffffff;
    --color-primary-dim: rgba(14, 165, 233, 0.15);
    --color-success: #10b981;
    --color-success-dim: rgba(16, 185, 129, 0.14);
    --color-danger: #ef4444;
    --color-danger-dim: rgba(239, 68, 68, 0.14);
    --color-border: #e2e8f0;
    --color-bubble-in: #ffffff;
    --color-bubble-out: #0ea5e9;
    --color-text: #1e293b;
    --color-description: #64748b;
    --color-icon: #94a3b8;
    --color-composer: #ffffff;
    --color-secondary-hover: #f1f5f9;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --transition: 0.2s;
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-md: 1rem;
    --font-sans: 'Inter', sans-serif;
}

body {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, #a4cbd6 0%, #d5e9bf 50%, #f6f0cf 100%); /* Nền gradient mượt theo ảnh */
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Tùy chỉnh thanh cuộn cho khu vực chat */
.chat-scroll::-webkit-scrollbar {
    width: 6px;
}
.chat-scroll::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
}
.chat-scroll::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 10px;
}

/* Hiệu ứng nhấp nháy con trỏ thực tế chỉ áp dụng khi đang gõ */
.cursor-blink::after {
    content: '|';
    animation: blink 1s step-end infinite;
    color: #0ea5e9; /* Màu xanh neon thanh lịch */
    font-weight: bold;
    margin-left: 2px;
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Con trỏ chuột fake */
#fake-cursor {
    position: absolute;
    width: 20px;
    height: 20px;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path d="M7 2l12 11.2-5.8.5 3.3 7.3-2.2.9-3.2-7.4-4.4 4.1z" fill="%23000" stroke="%23fff" stroke-width="1.5"/></svg>');
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 1000;
    pointer-events: none;
    transition: top 1.2s cubic-bezier(0.25, 0.8, 0.25, 1), left 1.2s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.3s;
    top: 50%;
    left: 50%;
    opacity: 0;
}

/* Animation xuất hiện mượt */
.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(8px);
}
@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Nút icon tương tác */
.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: #8e9cae;
    transition: all 0.2s;
}
.icon-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: #4a5568;
}

/* Glass Button (styled like ChatInlineButton) */
.glass-btn {
    align-items: center;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    font-family: inherit;
    font-size: var(--font-sm);
    font-weight: 500;
    justify-content: center;
    min-height: 38px;
    padding: 6px 16px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease-in-out;
    width: 100%;
    box-sizing: border-box;
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.85);
}

.glass-btn:active {
    transform: scale(0.99);
    background-color: #f0f9ff;
    border-color: #bae6fd;
}

/* Composer simulator styles */
.simulator-composer {
  width: 100%;
  position: relative;
  z-index: 10;
}

.simulator-pill {
  align-items: flex-end;
  background: var(--color-composer);
  border-radius: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--color-border);
  display: flex;
  gap: 2px;
  min-height: 48px;
  padding: 4px 6px 4px 4px;
  width: 100%;
  box-sizing: border-box;
}

.simulator-side-btn {
  align-items: center;
  align-self: flex-end;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  color: var(--color-icon);
  cursor: pointer;
  display: flex;
  flex-shrink: 0;
  height: 40px;
  justify-content: center;
  margin-bottom: 1px;
  transition: background var(--transition), color var(--transition);
  width: 40px;
  padding: 0;
}

.simulator-side-btn:hover {
  background: var(--color-secondary-hover);
  color: var(--color-text);
}

.simulator-input {
  background: transparent;
  border: none;
  color: var(--color-text);
  flex: 1;
  font-family: inherit;
  font-size: var(--font-sm);
  line-height: 1.35;
  margin-bottom: 9px;
  min-height: 22px;
  outline: none;
  padding: 0 var(--space-1);
  resize: none;
  align-self: flex-end;
  box-sizing: border-box;
  display: flex;
  align-items: center;
}

.simulator-action-btn {
  align-items: center;
  align-self: flex-end;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-full);
  color: var(--color-primary-foreground);
  cursor: pointer;
  display: flex;
  flex-shrink: 0;
  height: 40px;
  justify-content: center;
  margin-bottom: 1px;
  overflow: hidden;
  position: relative;
  transition: background var(--transition), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow var(--transition);
  width: 40px;
  padding: 0;
}

.simulator-action-btn:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.35);
}

.simulator-action-btn:active {
  transform: scale(0.94);
}

.simulator-action-icons {
  display: grid;
  height: 20px;
  place-items: center;
  width: 20px;
}

.simulator-action-icon {
  grid-area: 1 / 1;
  height: 20px;
  width: 20px;
  transition: opacity var(--transition), transform var(--transition);
}

.simulator-mic-icon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
  color: white;
}

.simulator-plane-icon {
  opacity: 0;
  transform: scale(0.5) rotate(-24deg);
  color: white;
}

.simulator-action-btn[data-mode="send"] .simulator-mic-icon {
  opacity: 0;
  transform: scale(0.5) rotate(24deg);
}

.simulator-action-btn[data-mode="send"] .simulator-plane-icon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

/* AgentActivityCard simulator classes */
.activity-row {
  align-items: flex-start;
  display: flex;
  gap: var(--space-2);
  padding: 2px 0;
  margin-bottom: var(--space-1);
}

.activity-avatar {
  flex-shrink: 0;
}

.activity-card {
  background: var(--color-bubble-in);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: min(440px, 85%);
  width: 100%;
  padding: var(--space-3);
  box-sizing: border-box;
}

.activity-header {
  align-items: center;
  display: flex;
  gap: var(--space-2);
}

.activity-dot {
  border-radius: var(--radius-full);
  flex-shrink: 0;
  height: 8px;
  width: 8px;
}

.activity-header[data-state="working"] .activity-dot {
  animation: activityPulse 1.3s infinite ease-in-out;
  background: var(--color-primary);
}

.activity-header[data-state="done"] .activity-dot {
  background: var(--color-success);
}

.activity-header[data-state="error"] .activity-dot {
  background: var(--color-danger);
}

.activity-header-text {
  color: var(--color-text);
  flex: 1;
  font-size: var(--font-sm);
  font-weight: 600;
}

.activity-header-count {
  color: var(--color-description);
  font-size: var(--font-xs);
  font-weight: 500;
}

.activity-timeline {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: 0;
}

.activity-step {
  display: flex;
  gap: var(--space-3);
  min-height: 34px;
}

.activity-marker {
  align-self: stretch;
  flex-shrink: 0;
  position: relative;
  width: 24px;
}

.activity-icon-bubble {
  align-items: center;
  background: var(--color-bubble-in);
  border-radius: var(--radius-full);
  display: flex;
  height: 24px;
  justify-content: center;
  position: relative;
  transition: background var(--transition), color var(--transition);
  width: 24px;
  z-index: 2;
  border: 1px solid var(--color-border);
  color: var(--color-description);
  box-sizing: border-box;
}

.activity-connector {
  background: var(--color-border);
  border-radius: 1px;
  bottom: 0;
  left: 50%;
  position: absolute;
  top: 24px;
  transform: translateX(-50%);
  width: 2px;
  z-index: 0;
}

.activity-connector[data-filled="true"] {
  background: var(--color-success);
}

.activity-connector[data-flowing="true"] {
  background: var(--color-border);
  overflow: visible;
}

.activity-connector[data-flowing="true"]::before {
  animation: connectorFlow 1.2s ease-in-out infinite;
  background: var(--color-primary);
  border-radius: 1px;
  content: "";
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  transform-origin: top center;
  width: 100%;
}

.activity-connector[data-flowing="true"]::after {
  animation: flowDot 1.1s ease-in-out infinite;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  bottom: -3px;
  box-shadow: 0 0 6px var(--color-primary);
  content: "";
  height: 6px;
  left: 50%;
  position: absolute;
  transform: translateX(-50%);
  width: 6px;
  z-index: 1;
}

.activity-icon {
  height: 13px;
  width: 13px;
}

.activity-step[data-status="done"] .activity-icon-bubble {
  background: color-mix(in srgb, var(--color-success) 16%, var(--color-bubble-in));
  color: var(--color-success);
  border-color: transparent;
}

.activity-step[data-status="running"] .activity-icon-bubble {
  animation: activityRing 1.6s infinite ease-out;
  background: color-mix(in srgb, var(--color-primary) 14%, var(--color-bubble-in));
  color: var(--color-primary);
  border-color: transparent;
}

.activity-step-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding-bottom: var(--space-2);
}

.activity-step-label {
  color: var(--color-text);
  font-size: var(--font-sm);
  font-weight: 500;
}

.activity-step[data-status="running"] .activity-step-label {
  animation: activityShimmer 1.5s infinite ease-in-out;
  color: var(--color-primary);
}

.activity-step[data-status="done"] .activity-step-label {
  color: var(--color-description);
}

.activity-step-detail {
  color: var(--color-description);
  font-size: var(--font-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Keyframes */
@keyframes activityPulse {
  0%, 100% { opacity: 0.4; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1); }
}

@keyframes activityRing {
  0% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4); }
  70% { box-shadow: 0 0 0 6px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

@keyframes activityShimmer {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

@keyframes connectorFlow {
  0% { transform: scaleY(0); }
  60% { transform: scaleY(1); }
  100% { opacity: 0.35; transform: scaleY(1); }
}

@keyframes flowDot {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(0.85); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.15); }
}