@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary-color: #000000;
  --secondary-color: #ffffff;
  --accent-color: #3b82f6; /* A subtle blue for some interactions if needed */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --bg-light: #f9fafb;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  background-color: var(--secondary-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar for a more premium feel */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
  background: #d1d5db;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #9ca3af;
}

/* Animations */
.fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
  opacity: 0;
  transform: translateY(20px);
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Navbar glass effect */
.glass-nav {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* Hover effects for cards */
.hover-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.hover-card:hover {
  transform: translateY(-5px);
  box-shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Utility for hiding elements but keeping them accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* 统一修改大号标题的行高，覆盖 Tailwind 默认在屏幕断点的大号字体自带的 line-height: 1 设定 */
.text-4xl,
.text-5xl,
.text-6xl,
.text-7xl,
.text-8xl,
.md\:text-5xl,
.md\:text-6xl,
.md\:text-7xl,
.lg\:text-6xl,
.lg\:text-7xl,
.lg\:text-8xl {
  line-height: 1.1 !important;
}