/* 宁静的专注 - 现代优雅风格 */
:root {
  --cream: #fefdf8;
  --paper: #faf8f3;
  --charcoal: #2a2d34;
  --sage: #8a9b6e;
  --sage-light: #a4b58c;
  --gray: #6c757d;
  --gray-light: #e9ecef;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 3rem;
  --radius: 6px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --transition: all 0.25s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--charcoal);
  background: linear-gradient(135deg, #f5f7fa 0%, #faf8f3 100%);
  min-height: 100vh;
  padding: var(--spacing-md);
  font-weight: 350;
}

.container {
  max-width: 780px;
  margin: 0 auto;
  background: var(--cream);
  padding: var(--spacing-xl);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.9);
  position: relative;
  overflow: hidden;
}

.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sage-light), transparent);
}

h1 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  font-size: 2.1rem;
  font-weight: 420;
  color: var(--charcoal);
  letter-spacing: -0.02em;
  position: relative;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--sage);
  opacity: 0.6;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 450;
  color: var(--charcoal);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.content-display {
  background: var(--paper);
  border: 1px solid rgba(138, 155, 110, 0.15);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  min-height: 140px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--charcoal);
  transition: var(--transition);
  backdrop-filter: blur(4px);
}

.content-display:hover {
  border-color: rgba(138, 155, 110, 0.3);
  box-shadow: 0 4px 16px rgba(138, 155, 110, 0.1);
}

.no-wrap {
  white-space: nowrap;
  margin-bottom: var(--spacing-xs);
  padding: 0.6rem 1rem;
  background: rgba(138, 155, 110, 0.05);
  border-left: 2px solid var(--sage);
  border-radius: 3px;
  transition: var(--transition);
  position: relative;
}

.no-wrap:hover {
  background: rgba(138, 155, 110, 0.08);
  transform: translateX(4px);
}

.no-wrap::before {
  content: '›';
  position: absolute;
  left: 0.5rem;
  color: var(--sage);
  opacity: 0;
  transition: var(--transition);
}

.no-wrap:hover::before {
  opacity: 1;
}

.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  background: var(--sage);
  color: white;
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 450;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  background: var(--sage-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(138, 155, 110, 0.3);
}

.btn-container {
  text-align: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(138, 155, 110, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-sm);
  }
  
  .container {
    padding: var(--spacing-lg);
  }
  
  h1 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
  }
  
  .content-display {
    padding: var(--spacing-sm);
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--spacing-md);
    border-radius: 4px;
  }
  
  h1 {
    font-size: 1.6rem;
  }
  
  .content-display {
    padding: var(--spacing-sm);
    font-size: 0.8rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    width: 100%;
    max-width: 220px;
  }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
  :root {
    --cream: #1a1c23;
    --paper: #21242c;
    --charcoal: #e2e8f0;
    --sage: #9cb380;
    --gray-light: #2d3748;
  }
  
  body {
    background: linear-gradient(135deg, #0f0f15 0%, #1a1c23 100%);
  }
}

/* 平滑滚动和焦点样式 */
html {
  scroll-behavior: smooth;
}

.btn:focus,
.content-display:focus {
  outline: 2px solid var(--sage-light);
  outline-offset: 2px;
}