/* toolcraftx.com - 浅色清爽风 */
:root {
  --primary-bg: #ffffff;
  --secondary-bg: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-blue-dark: #2563eb;
  --border-color: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--secondary-bg);
  color: var(--text-primary);
  line-height: 1.6;
}

/* 导航栏 */
header {
  background: var(--primary-bg);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent-blue);
}

.logo span {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-blue);
}

/* Hero区域 */
.hero {
  padding: 140px 2rem 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero h1 span {
  color: var(--accent-blue);
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* 主要内容 */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

section {
  padding: 40px 0;
}

.section-title {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

/* 工具分类网格 */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.tool-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-blue);
}

.tool-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.tool-card h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.tool-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* 工具页面通用样式 */
.tool-page {
  max-width: 900px;
  margin: 0 auto;
  padding-top: 100px;
}

.tool-page h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.tool-page .subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.tool-container {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.tool-input {
  width: 100%;
  min-height: 200px;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.9rem;
  resize: vertical;
  transition: border-color 0.3s;
}

.tool-input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.tool-buttons {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
  font-size: 0.9rem;
}

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

.btn-primary:hover {
  background: var(--accent-blue-dark);
}

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

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

.btn-success {
  background: #10b981;
  color: white;
}

.btn-success:hover {
  background: #059669;
}

/* 工具输出 */
.tool-output {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--secondary-bg);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.tool-output h4 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.output-content {
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text-primary);
  max-height: 300px;
  overflow-y: auto;
}

/* 状态消息 */
.status {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  font-size: 0.9rem;
}

.status.success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.status.error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* 快捷工具栏 */
.quick-tools {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
}

.quick-tools h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.quick-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.quick-btn {
  padding: 8px 16px;
  background: var(--accent-blue);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.3s;
}

.quick-btn:hover {
  background: var(--accent-blue-dark);
}

/* 友情链接 */
.friend-links {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  margin-top: 3rem;
  text-align: center;
  border: 1px solid var(--border-color);
}

.friend-links h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.friend-links-grid {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.friend-links a {
  color: var(--accent-blue);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent-blue);
  border-radius: 6px;
  transition: all 0.3s;
}

.friend-links a:hover {
  background: var(--accent-blue);
  color: white;
}

/* Footer */
footer {
  background: var(--text-primary);
  color: white;
  padding: 2rem;
  text-align: center;
  margin-top: 3rem;
}

footer p {
  margin-bottom: 0.5rem;
  color: #94a3b8;
}

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

/* 二维码预览 */
.qr-preview {
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: 8px;
  margin-top: 1rem;
  border: 1px solid var(--border-color);
}

.qr-preview canvas {
  max-width: 200px;
  margin: 0 auto;
}

/* 单位转换器 */
.converter-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: end;
}

.converter-grid select {
  width: 100%;
}

.converter-arrow {
  font-size: 1.5rem;
  color: var(--accent-blue);
  padding-bottom: 0.5rem;
}

/* 响应式 */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .converter-grid {
    grid-template-columns: 1fr;
  }
  
  .converter-arrow {
    text-align: center;
    transform: rotate(90deg);
  }
}