CamTalk/frontend/src/App.css

/* ============================================================
   CamTalk — Web 端应用样式
   双栏布局：左侧视频面板 + 右侧聊天面板
   ============================================================ */

:root {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-bg: #0b0f1a;
  --color-surface: #151b2b;
  --color-surface-2: #1c2438;
  --color-text: #e2e8f0;
  --color-text-muted: #64748b;
  --color-border: #1e293b;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --radius: 10px;
  --radius-sm: 6px;
}

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

html, body, #root {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

/* ---- App Shell ---- */

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ---- Header ---- */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 48px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.header__left {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.header__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
}

.header__subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.header__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__stats {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 4px 10px;
  background: var(--color-surface-2);
  border-radius: 12px;
}

.badge {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 500;
}

.badge--connected {
  color: var(--color-success);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge--connecting {
  color: var(--color-warning);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge--disconnected {
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
}

.btn-icon {
  background: none;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
  color: var(--color-text-muted);
}

.btn-icon:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* ---- Workspace (双栏) ---- */

.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ---- 左侧视频面板 ---- */

.video-panel {
  width: 400px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 12px;
}

.video-container {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #0a0e17;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.video-container .video-preview {
  width: 100%;
  height: 100%;
  border-radius: 0;
}

.video-container .video-preview__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

.video-placeholder__icon {
  font-size: 2.4rem;
  opacity: 0.2;
  margin-bottom: 4px;
}

.video-indicator {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  color: var(--color-success);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  animation: pulse 1.5s ease-in-out infinite;
}

.video-indicator--loading { color: var(--color-warning); }
.video-indicator--audio { left: auto; right: 16px; color: var(--color-primary); }
.video-indicator--error { color: var(--color-error); animation: none; }

.detail-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(37, 99, 235, 0.85);
  backdrop-filter: blur(8px);
  color: white;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.observation-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(34, 197, 94, 0.85);
  backdrop-filter: blur(8px);
  color: white;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  animation: pulse 2s ease-in-out infinite;
}

.video-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}

.video-overlay__spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ---- 视频控制栏 ---- */

.video-controls {
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  padding: 4px 0;
}

.video-controls__row {
  display: flex;
  gap: 8px;
}

/* ---- 右侧聊天面板 ---- */

.chat-panel-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  min-width: 0;
}

.chat-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.chat-panel-header__mode {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-success);
  background: rgba(34, 197, 94, 0.1);
  padding: 2px 8px;
  border-radius: 10px;
}

.chat-panel-body {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ---- Chat Panel (覆盖子组件样式) ---- */

.chat-panel {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-panel--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.chat-message {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  max-width: 92%;
}

.chat-message--user {
  border-left: 2px solid var(--color-primary);
  align-self: flex-end;
  background: rgba(37, 99, 235, 0.08);
}

.chat-message--assistant {
  border-left: 2px solid var(--color-success);
}

.chat-message--streaming {
  opacity: 0.85;
}

.chat-message__role {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
  margin-bottom: 3px;
}

.chat-message__content {
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.chat-message__meta {
  margin-top: 6px;
  font-size: 0.65rem;
  color: var(--color-text-muted);
}

/* ---- Streaming Cursor ---- */

.cursor {
  display: inline;
  animation: blink 0.8s step-end infinite;
  color: var(--color-success);
}

/* ---- System Message ---- */

.system-message {
  text-align: center;
  padding: 8px 16px;
  margin: 0 20px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.system-message--warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

/* ---- Drawer (Config Panel) ---- */

.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  animation: fadeIn 0.2s ease;
}

.drawer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  animation: slideInRight 0.25s ease;
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.3);
}

.drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.drawer__title {
  font-weight: 600;
  font-size: 0.9rem;
}

.drawer__close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.drawer__close:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.drawer__body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

/* ---- Config Group ---- */

.config-group {
  margin-bottom: 20px;
}

.config-group__title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.config-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  font-size: 0.82rem;
  color: var(--color-text);
  cursor: pointer;
}

.config-row__info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.config-row__label {
  font-weight: 500;
  color: var(--color-text);
}

.config-row__desc {
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.config-row select,
.config-row input[type="checkbox"] {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.8rem;
  cursor: pointer;
}

.config-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* ---- Toast ---- */

.toast-container {
  position: fixed;
  top: 68px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  cursor: pointer;
  animation: slideIn 0.3s ease-out;
  max-width: 320px;
  backdrop-filter: blur(8px);
}

.toast--error { background: rgba(239, 68, 68, 0.9); color: white; }
.toast--warning { background: rgba(245, 158, 11, 0.9); color: #000; }
.toast--info { background: rgba(37, 99, 235, 0.9); color: white; }

/* ---- Buttons ---- */

.btn {
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn--lg {
  padding: 12px 32px;
  font-size: 0.95rem;
  border-radius: var(--radius);
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

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

.btn--secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background: var(--color-border);
}

.btn--warning {
  background: var(--color-warning);
  color: #000;
}

.btn--warning:hover { opacity: 0.9; }

.btn--danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn--danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn--active {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.4);
  animation: pulseBtn 2s ease-in-out infinite;
}

/* ---- Animations ---- */

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes pulseBtn {
  0%, 100% { box-shadow: 0 0 12px rgba(37, 99, 235, 0.4); }
  50% { box-shadow: 0 0 20px rgba(37, 99, 235, 0.7); }
}

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

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

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

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

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

/* ---- Scrollbar ---- */

::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}