:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #12171f;
  --bg-card: #161d27;
  --bg-input: #1c2333;
  --bg-hover: #1e2636;
  --accent: #c79c6e;
  --accent-hover: #d4aa78;
  --accent-dim: rgba(199,156,110,0.15);
  --accent-glow: rgba(199,156,110,0.3);
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --border: #21262d;
  --border-light: #30363d;
  --success: #4ade80;
  --warning: #fbbf24;
  --error: #f87171;
  --info: #60a5fa;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
  --sidebar-width: 280px;
  --announcement-height: 0px;
  --footer-height: 50px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

input, textarea {
  font-family: inherit;
}

.view {
  display: none;
  min-height: 100vh;
  padding-bottom: var(--footer-height, 50px);
  padding-top: var(--announcement-height, 0px);
}

.view.active {
  display: flex;
}

/* 通用按钮 */
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #d4aa78);
  color: #0a0e14;
  border: none;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--accent-dim);
}

.btn-full {
  width: 100%;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  padding: 8px;
  border-radius: var(--radius-xs);
  transition: var(--transition);
}

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

.btn-back {
  background: transparent;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: var(--transition);
}

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

/* 滚动条 */
::-webkit-scrollbar {
  width: 6px;
}

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

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

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

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  animation: slideIn 0.3s ease;
  max-width: 360px;
  word-break: break-word;
}

.toast-success {
  background: rgba(74,222,128,0.15);
  border: 1px solid var(--success);
  color: var(--success);
}

.toast-error {
  background: rgba(248,113,113,0.15);
  border: 1px solid var(--error);
  color: var(--error);
}

.toast-info {
  background: rgba(96,165,250,0.15);
  border: 1px solid var(--info);
  color: var(--info);
}

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

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

/* Loading */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Modal 遮罩 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5000;
  animation: fadeIn 0.2s ease;
}

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

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 440px;
  width: 90%;
  animation: scaleIn 0.2s ease;
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* 移动端适配 */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100vw;
  }
}