/* ===== 统一设计系统 ===== */

/* --- 变量 --- */
:root {
  --brand: #f39c12;
  --brand-dark: #e67e22;
  --bg: #ffffff;
  --bg-soft: #f8f9fa;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6c757d;
  --border: #e9ecef;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

/* --- 导航栏 --- */
.global-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}
.global-nav .nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--brand);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.global-nav .nav-links {
  display: flex;
  gap: 0.3rem;
  align-items: center;
}
.global-nav .nav-links a {
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.global-nav .nav-links a:hover {
  color: var(--text);
  background: var(--bg-soft);
}
.global-nav .nav-links a.active {
  color: var(--brand);
  background: rgba(243,156,18,0.08);
  font-weight: 600;
}
.global-nav .nav-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
}

/* 移动端导航 */
@media (max-width: 768px) {
  .global-nav .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 0.5rem;
    gap: 0.2rem;
  }
  .global-nav .nav-links.open {
    display: flex;
  }
  .global-nav .nav-links a {
    padding: 0.7rem 1rem;
    width: 100%;
  }
  .global-nav .nav-menu-btn {
    display: block;
  }
}

/* 页面内容偏移（给导航栏留空间） */
body.has-global-nav {
  padding-top: 56px;
}

/* --- 通用按钮 --- */
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-brand:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.btn-brand:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-secondary:hover {
  background: var(--border);
}

/* --- 通用卡片 --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: all 0.25s ease;
}
.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* --- 通用输入框 --- */
.input-field {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  font-family: var(--font);
}
.input-field:focus {
  outline: none;
  border-color: var(--brand);
}

/* --- 错误提示 --- */
.error-toast {
  background: #fee2e2;
  border: 1px solid #fecaca;
  color: #dc2626;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* --- 加载状态 --- */
.loading-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--brand);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- 工具卡片（首页用） --- */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}
.tool-card:hover {
  border-color: var(--brand);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.tool-card .tool-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.tool-card:hover .tool-icon {
  border-color: var(--brand);
}
.tool-card .tool-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.tool-card .tool-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
}
.tool-card .tool-tag {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--brand);
  border: 1px solid var(--brand);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}