/* ─── Design System (GitHub Settings 风格) ─── */

:root {
  /* 颜色 */
  --color-primary: #1b61c9;
  --color-primary-hover: #1558b0;
  --color-bg: #f6f8fa;
  --color-canvas: #ffffff;
  --color-border: #d0d7de;
  --color-border-muted: #d8dee4;
  --color-text: #1f2328;
  --color-text-secondary: #656d76;
  --color-text-tertiary: #8b949e;
  --color-danger: #cf222e;
  --color-danger-hover: #a40e26;
  --color-success: #1a7f37;
  --color-warning: #9a6700;
  --color-accent: #ddf4ff;
  --color-accent-emphasis: #54aeff;

  /* 间距 */
  --sidebar-width: 240px;
  --header-height: 48px;

  /* 圆角 */
  --radius: 6px;
  --radius-lg: 8px;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* 过渡 */
  --transition: 150ms ease;
}

/* ─── Reset ─── */

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

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

/* ─── 公共首页 ─── */

.landing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas);
}

.landing-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.landing-brand svg {
  width: 28px;
  height: 28px;
}

.landing-hero {
  text-align: center;
  padding: 80px 24px 60px;
  max-width: 720px;
  margin: 0 auto;
}

.landing-hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--color-text);
}

.landing-hero .subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.landing-hero .cta-group {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.landing-pricing {
  max-width: 800px;
  margin: 0 auto 80px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.pricing-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  border-width: 2px;
  position: relative;
}

.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -10px;
  left: 24px;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 12px;
}

.pricing-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 4px;
}

.pricing-card .price-period {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 24px;
}

.pricing-card ul li {
  padding: 6px 0;
  color: var(--color-text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-card ul li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 600;
}

.landing-footer {
  text-align: center;
  padding: 32px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-tertiary);
  font-size: 13px;
}

/* ─── 用户中心布局 ─── */

.center-layout {
  display: flex;
  min-height: 100vh;
}

/* ─── 侧边栏 ─── */

.sidebar {
  width: var(--sidebar-width);
  background: var(--color-canvas);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
}

.sidebar-header svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.sidebar-nav {
  flex: 1;
  padding: 8px 0;
}

.sidebar-section {
  margin-bottom: 4px;
}

.sidebar-section-title {
  padding: 8px 16px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  color: var(--color-text);
  font-size: 14px;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  text-decoration: none;
  transition: background var(--transition);
}

.sidebar-item:hover {
  background: var(--color-bg);
  text-decoration: none;
}

.sidebar-item.active {
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 500;
}

.sidebar-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.sidebar-item .badge {
  margin-left: auto;
  font-size: 11px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--color-bg);
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-border);
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.sidebar-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  overflow: hidden;
  flex-shrink: 0;
}

.sidebar-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-username {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-logout {
  font-size: 13px;
  color: var(--color-text-secondary);
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px 0;
}

.sidebar-logout:hover {
  color: var(--color-danger);
}

/* 移动端菜单按钮 */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-canvas);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.sidebar-toggle svg {
  width: 20px;
  height: 20px;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 99;
}

/* ─── 主内容区 ─── */

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 32px;
  max-width: 960px;
}

.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* ─── 卡片 ─── */

.card {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.card-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 14px;
}

.card-body {
  padding: 24px;
}

/* ─── 表单 ─── */

.form-group {
  margin-bottom: 16px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
}

.form-hint {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.form-input {
  width: 100%;
  padding: 5px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-canvas);
  line-height: 20px;
  min-height: 32px;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 3px rgba(84, 174, 255, 0.3);
}

.form-input:disabled,
.form-input[readonly] {
  background: var(--color-bg);
  color: var(--color-text-secondary);
}

.form-input-sm {
  max-width: 320px;
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

/* ─── 按钮 ─── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 5px 16px;
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition);
  white-space: nowrap;
}

.btn:hover {
  background: var(--color-border-muted);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: rgba(27, 97, 201, 0.4);
}

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

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

.btn-danger:hover {
  background: #ffebe9;
  border-color: rgba(207, 34, 46, 0.4);
  color: var(--color-danger-hover);
}

.btn-sm {
  padding: 3px 12px;
  font-size: 12px;
}

.btn-lg {
  padding: 9px 24px;
  font-size: 16px;
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

/* ─── 仪表盘 ─── */

.dashboard-welcome {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
}

.dashboard-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text-secondary);
  overflow: hidden;
  flex-shrink: 0;
}

.dashboard-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dashboard-welcome h2 {
  font-size: 18px;
  font-weight: 600;
}

.dashboard-welcome p {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  padding: 16px 24px;
}

.quick-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition);
  text-decoration: none;
  color: var(--color-text);
}

.quick-link:hover {
  border-color: var(--color-accent-emphasis);
  text-decoration: none;
}

.quick-link svg {
  width: 20px;
  height: 20px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.quick-link .link-text {
  font-size: 14px;
  font-weight: 500;
}

.quick-link .link-desc {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ─── 信息行 ─── */

.info-list {
  list-style: none;
}

.info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list .label {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.info-list .value {
  color: var(--color-text);
}

/* ─── 状态指示 ─── */

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 12px;
}

.status-badge.verified {
  background: #dafbe1;
  color: var(--color-success);
}

.status-badge.unverified {
  background: #fff8c5;
  color: var(--color-warning);
}

.status-badge.active {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* ─── Coming Soon ─── */

.coming-soon {
  text-align: center;
  padding: 64px 24px;
  color: var(--color-text-secondary);
}

.coming-soon svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--color-text-tertiary);
}

.coming-soon h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.coming-soon p {
  font-size: 14px;
}

/* ─── Toast 提示 ─── */

.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas);
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  animation: toast-in 200ms ease;
}

.toast.success {
  border-left: 3px solid var(--color-success);
}

.toast.error {
  border-left: 3px solid var(--color-danger);
}

.toast.info {
  border-left: 3px solid var(--color-primary);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── 加载状态 ─── */

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

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

.loading-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  color: var(--color-text-secondary);
  gap: 8px;
}

/* ─── 响应式 ─── */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 200ms ease;
  }

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

  .sidebar-toggle {
    display: flex;
  }

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

  .main-content {
    margin-left: 0;
    padding: 16px;
    padding-top: 56px;
  }

  .landing-hero h1 {
    font-size: 28px;
  }

  .landing-hero .subtitle {
    font-size: 16px;
  }

  .landing-hero .cta-group {
    flex-direction: column;
    align-items: center;
  }

  .landing-pricing {
    grid-template-columns: 1fr;
  }

  .quick-links {
    grid-template-columns: 1fr;
  }

  .form-input-sm {
    max-width: none;
  }
}