/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   wins "en" - Design System
   High-end Brand Site for Japan Private Concierge
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

/* ━━━ Font Imports ━━━ */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@300;400;500;600;700&family=Montserrat:wght@300;400;500;600;700&family=Noto+Serif+JP:wght@300;400;500;600;700&display=swap');

/* ━━━ CSS Variables ━━━ */
:root {
  /* Colors - Minimalist & Luxurious */
  --color-bg-primary: #FAFAF8;
  --color-bg-secondary: #F5F5F3;
  --color-bg-dark: #2C2C2C;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #6B6B6B;
  --color-text-light: #9B9B9B;
  --color-accent: #8B7355;
  --color-accent-hover: #6B5335;
  --color-border: #E5E5E3;
  --color-white: #FFFFFF;
  
  /* Typography */
  --font-serif: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --font-sans: 'Montserrat', 'Noto Sans JP', sans-serif;
  
  /* Font Sizes - Enhanced Typography Hierarchy */
  --font-size-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --font-size-base: clamp(1.05rem, 1rem + 0.25vw, 1.2rem);
  --font-size-lg: clamp(1.25rem, 1.1rem + 0.75vw, 1.75rem);
  --font-size-xl: clamp(1.75rem, 1.4rem + 1.75vw, 3rem);
  --font-size-2xl: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
  --font-size-3xl: clamp(3rem, 2.5rem + 2.5vw, 5.5rem);
  --font-size-hero: clamp(3.5rem, 3rem + 2.5vw, 6.5rem);
  
  /* Spacing */
  --space-xs: clamp(0.5rem, 0.45rem + 0.25vw, 0.75rem);
  --space-sm: clamp(1rem, 0.9rem + 0.5vw, 1.5rem);
  --space-md: clamp(2rem, 1.8rem + 1vw, 3rem);
  --space-lg: clamp(3rem, 2.5rem + 2.5vw, 5rem);
  --space-xl: clamp(5rem, 4rem + 5vw, 8rem);
  --space-2xl: clamp(8rem, 6rem + 10vw, 12rem);
  
  /* Layout */
  --container-max-width: 1400px;
  --container-narrow: 900px;
  --container-wide: 1800px;
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
}

/* ━━━ Global Reset & Base Styles ━━━ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ━━━ Typography ━━━ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

h1 {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

h2 {
  font-size: var(--font-size-2xl);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: 500;
  line-height: 1.3;
}

h4 {
  font-size: var(--font-size-lg);
  font-weight: 500;
  line-height: 1.4;
}

p {
  margin-bottom: var(--space-sm);
  line-height: 1.75;
  font-size: var(--font-size-base);
}

.text-serif {
  font-family: var(--font-serif);
}

.text-sans {
  font-family: var(--font-sans);
}

.text-light {
  color: var(--color-text-light);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-center {
  text-align: center;
}

.font-light {
  font-weight: 300;
}

.font-normal {
  font-weight: 400;
}

.font-medium {
  font-weight: 500;
}

.letter-spacing-wide {
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ━━━ Layout Components ━━━ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
}

.section-lg {
  padding: var(--space-2xl) 0;
}

/* ━━━ Grid System ━━━ */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ━━━ Buttons ━━━ */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1rem 2.5rem;
  border: 2px solid var(--color-text-primary);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-text-primary);
  transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.btn:hover::before {
  left: 0;
}

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

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

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

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

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

.btn-lg {
  padding: 1.25rem 3rem;
  font-size: var(--font-size-base);
}

/* ━━━ Images ━━━ */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-contain {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ━━━ Utilities ━━━ */
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ━━━ Responsive ━━━ */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}