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

:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  --color-beige: #d4c5b9;
  --color-taupe: #9b8b7e;
  --color-accent: #8b7355;
  
  --font-sans: 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  overflow-x: hidden;
}

.page-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding-top: 80px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 400;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 2rem);
}

p {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  letter-spacing: 0.01em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition-smooth);
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.hover-scale {
  transition: var(--transition-smooth);
}

.hover-scale:hover {
  transform: scale(1.03);
}

@media (max-width: 768px) {
  .main-content {
    padding-top: 70px;
  }
  
  h1 {
    letter-spacing: 0.01em;
  }
  
  p {
    line-height: 1.7;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding-top: 60px;
  }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-gray-200);
  border-top-color: var(--color-gray-800);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-400);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-500);
}