/* 主要样式文件 */
:root {
  --primary-pink: #ff6b9d;
  --light-pink: #ffe0ea;
  --soft-pink: #ffeef3;
  --dark-pink: #e55a87;
  --accent-purple: #9b59b6;
  --light-purple: #e8d5f4;
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --gray: #6c757d;
  --dark-gray: #495057;
  --success-green: #28a745;
  --warning-orange: #fd7e14;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--soft-pink) 0%, var(--light-purple) 100%);
  min-height: 100vh;
  color: var(--dark-gray);
  line-height: 1.6;
}

.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
}

/* 头部样式 */
.header {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  border: 2px solid var(--light-pink);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 2rem;
  background: linear-gradient(45deg, var(--primary-pink), var(--accent-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(45deg, var(--primary-pink), var(--accent-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.current-date {
  font-size: 0.9rem;
  color: var(--gray);
  font-weight: 500;
}

.streak-counter {
  display: flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(45deg, var(--primary-pink), var(--dark-pink));
  color: var(--white);
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
}

.streak-icon {
  font-size: 1.1rem;
}

/* 导航标签页 */
.nav-tabs {
  display: flex;
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 6px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  gap: 4px;
}

.nav-tab {
  flex: 1;
  padding: 12px 20px;
  border: none;
  background: transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: 500;
  color: var(--gray);
  transition: var(--transition);
  font-size: 0.9rem;
}

.nav-tab:hover {
  background: var(--light-pink);
  color: var(--dark-pink);
}

.nav-tab.active {
  background: linear-gradient(45deg, var(--primary-pink), var(--dark-pink));
  color: var(--white);
  box-shadow: 0 2px 8px rgba(255, 107, 157, 0.4);
}

/* 主要内容区域 */
.main-content {
  position: relative;
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease;
}

.tab-content.active {
  display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .app-container {
    padding: 16px;
  }

  .header-content {
    flex-direction: column;
    text-align: center;
  }

  .logo h1 {
    font-size: 1.25rem;
  }

  .nav-tabs {
    flex-direction: column;
    gap: 2px;
  }

  .nav-tab {
    padding: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .app-container {
    padding: 12px;
  }

  .header {
    padding: 16px;
  }

  .logo-icon {
    font-size: 1.5rem;
  }

  .logo h1 {
    font-size: 1.1rem;
  }
}

/* 淡入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}