@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600&family=Noto+Sans+JP:wght@300;400;500;600&family=Noto+Serif+JP:wght@400;500;600;700&family=Playfair+Display:wght@400;500;600;700&display=swap');

:root {
  --primary-color: #2F5B4D; /* Deep Celadon Green */
  --accent-color: #7EBEA5; /* Seiji-iro / Celadon */
  --accent-hover: #5F9A83;
  --accent-light: #EBF3F0;
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-dark: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  --border-color: #e2e8f0;
  
  --font-heading: 'Playfair Display', 'Noto Serif JP', serif;
  --font-body: 'Montserrat', 'Noto Sans JP', sans-serif;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: var(--bg-base);
  line-height: 1.6;
  opacity: 0; /* For page transition fade in */
  animation: fadeIn var(--transition-slow) forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--primary-color);
  line-height: 1.2;
}

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

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

/* Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
}

.section {
  padding: 5rem 0;
}

.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-4 { margin-bottom: 4rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
}

.btn-outline:hover {
  background-color: var(--accent-color);
  color: white;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  background: transparent;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: white; /* Default for transparent nav */
  letter-spacing: 1px;
}

.navbar.scrolled .nav-brand {
  color: var(--primary-color);
}

.nav-brand span {
  color: var(--accent-color);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  position: relative;
}

.navbar.scrolled .nav-links a {
  color: var(--text-main);
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent-color);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--accent-color);
}
.nav-links a.active::after {
  width: 100%;
}

/* Page Header (for non-home pages) */
.page-header {
  height: 40vh;
  min-height: 300px;
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  margin-bottom: 3rem;
  padding-top: 80px;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(47, 91, 77, 0.9) 0%, rgba(126, 190, 165, 0.4) 100%);
}

.page-header h1 {
  color: white;
  font-size: 3rem;
  position: relative;
  z-index: 1;
}

/* Footer */
.footer {
  background-color: var(--bg-dark);
  color: var(--text-muted);
  padding: 4rem 0 2rem;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h3 {
  color: white;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
}

/* Animations */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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