/* ==================== 全局样式 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-tertiary: #252836;
  --bg-hover: #2d3142;
  --text-primary: #e4e6eb;
  --text-secondary: #b0b3b8;
  --text-muted: #6c6f78;
  --accent: #4f8cff;
  --accent-hover: #6ba0ff;
  --success: #34c759;
  --danger: #ff4757;
  --warning: #ffa502;
  --border: #2d3142;
  --radius: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ==================== 屏幕切换 ==================== */
.screen {
  display: none;
  width: 100%;
  height: 100%;
}

.screen.active {
  display: flex;
}

/* ==================== 登录界面 ==================== */
#login-screen {
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #0f1117 0%, #1a1d27 50%, #252836 100%);
}

.login-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 40px;
  width: 400px;
  max-width: 90vw;
  box-shadow: var(--shadow);
  text-align: center;
}

.login-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.login-container h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.login-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
}

.input-group {
  margin-bottom: 20px;
  text-align: left;
}

.input-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.input-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border var(--transition);
}

.input-group input:focus {
  border-color: var(--accent);
}

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

#login-btn {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition);
  margin-top: 8px;
}

#login-btn:hover {
  background: var(--accent-hover);
}

#login-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error-msg {
  color: var(--danger);
  font-size: 13px;
  margin-top: 12px;
  min-height: 20px;
}

/* 修改密码 */
.change-pwd-link {
  color: var(--accent);
  font-size: 13px;
  cursor: pointer;
  margin-top: 16px;
  transition: color var(--transition);
}
.change-pwd-link:hover { color: var(--accent-hover); }

.pwd-toggle {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 16px;
  padding: 4px 6px;
  line-height: 1;
  opacity: 0.6;
}
.pwd-toggle:hover { opacity: 1; }

.btn-change-pwd {
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-change-pwd:hover { background: var(--accent-hover); }

.btn-cancel-pwd {
  padding: 10px 16px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius);
  font-size: 13px;
  cursor: pointer;
  margin-left: 8px;
  transition: all var(--transition);
}
.btn-cancel-pwd:hover { background: var(--bg-hover); }

/* ==================== 主界面布局 ==================== */
#main-screen {
  display: flex;
  height: 100%;
}

/* ==================== 侧边栏 ==================== */
#sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.status-badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 500;
}

.status-badge.connected {
  background: rgba(52, 199, 89, 0.15);
  color: var(--success);
}

.status-badge.disconnected {
  background: rgba(108, 111, 120, 0.15);
  color: var(--text-muted);
}

.status-badge.reconnecting {
  background: rgba(255, 149, 0, 0.15);
  color: #ff9500;
}

.sidebar-section {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex: 1;
  overflow-y: auto;
}

.sidebar-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.server-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.server-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.server-item:hover {
  background: var(--bg-hover);
  border-color: var(--border);
}

.server-item.active {
  border-color: var(--accent);
  background: rgba(79, 140, 255, 0.1);
}

.server-item-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.server-item-info {
  flex: 1;
  min-width: 0;
}

.server-item-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.server-item-id {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.server-item-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

.empty-hint {
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  padding: 20px 0;
}

.connection-info {
  font-size: 13px;
  color: var(--text-secondary);
}

.connection-info .info-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.connection-info .info-label {
  color: var(--text-muted);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn {
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-align: center;
}

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

.btn-danger {
  background: rgba(255, 71, 87, 0.15);
  color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
  background: rgba(255, 71, 87, 0.25);
}

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

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

/* ==================== 桌面区域 ==================== */
#desktop-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #000;
  min-width: 0;
}

/* 工具栏 */
#toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  gap: 16px;
  flex-wrap: wrap;
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.remote-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.fps-indicator {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Consolas', monospace;
  padding: 2px 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.tool-btn {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}

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

.tool-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.quality-slider {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.quality-slider label {
  white-space: nowrap;
}

.quality-slider input[type="range"] {
  width: 80px;
  accent-color: var(--accent);
}

.quality-slider span {
  color: var(--text-primary);
  min-width: 24px;
  text-align: right;
}

/* 画布容器 */
#canvas-container {
  flex: 1;
  position: relative;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  background-image: 
    radial-gradient(circle, #1a1a1a 1px, transparent 1px);
  background-size: 20px 20px;
}

#remote-video {
  display: block;
  cursor: default;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: #000;
}

/* 无连接覆盖层 */
#no-connection-overlay,
#connecting-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 17, 23, 0.92);
  z-index: 10;
}

.overlay-content {
  text-align: center;
}

.overlay-icon {
  font-size: 64px;
  margin-bottom: 20px;
}

.overlay-content h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.overlay-content p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 4px;
}

.overlay-hint {
  color: var(--text-muted) !important;
  font-size: 12px !important;
}

/* 加载动画 */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

/* 状态栏 */
#statusbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 6px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  #sidebar {
    width: 240px;
    min-width: 240px;
  }

  #toolbar {
    padding: 6px 10px;
    gap: 8px;
  }

  .toolbar-right {
    display: none;
  }
}

/* ==================== Toast 提示 ==================== */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 14px;
  z-index: 1000;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
  max-width: 360px;
}

.toast.error {
  border-color: var(--danger);
}

.toast.success {
  border-color: var(--success);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}