/* Ministry of Culture - Design System */
/* Japanese / Scandinavian Minimalism */

/* ===== CSS Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== Design Tokens ===== */
:root {
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Arial', sans-serif;
  
  /* Monochrome Palette */
  --color-black: #000000;
  --color-gray-900: #1a1a1a;
  --color-gray-800: #2d2d2d;
  --color-gray-700: #404040;
  --color-gray-600: #666666;
  --color-gray-500: #808080;
  --color-gray-400: #999999;
  --color-gray-300: #cccccc;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f5f5f5;
  --color-gray-50: #fafafa;
  --color-white: #ffffff;
  
  /* Accent Color */
  --color-orange: #ff6b35;
  
  /* Spacing Scale */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */
  --space-5xl: 8rem;      /* 128px */
  
  /* Typography Scale */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 2rem;       /* 32px */
  --text-4xl: 2.5rem;     /* 40px */
  --text-5xl: 3rem;       /* 48px */
  
  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.4;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;
  
  /* Layout */
  --max-width-content: 72rem;   /* 1152px */
  --border-width: 1px;
}

/* ===== Base Styles ===== */
html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--color-white);
  color: var(--color-black);
}

body {
  min-height: 100vh;
  background: var(--color-white);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

p {
  line-height: var(--leading-relaxed);
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--color-black);
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.6;
}

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

::selection {
  background: var(--color-black);
  color: var(--color-white);
}

/* ===== Loading State ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  font-size: var(--text-lg);
  color: var(--color-gray-600);
}

/* ===== Site Header ===== */
.site-header {
  padding: var(--space-xl) 0;
  border-bottom: var(--border-width) solid var(--color-black);
  margin-bottom: var(--space-xl);
}

.site-title {
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0;
}

.site-title a {
  border: none;
}

.site-title a:hover {
  opacity: 1;
}

.site-title .accent {
  color: var(--color-orange);
}

/* ===== Page Container ===== */
.page {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl);
}

/* ===== Homepage - Clean Post List ===== */
.posts {
  /* No padding - let posts breathe */
}

.post-item {
  border-bottom: var(--border-width) solid var(--color-gray-200);
  padding: var(--space-xl) 0;
  transition: background-color 0.2s ease;
}

.post-item:hover {
  background-color: var(--color-gray-100);
  margin-left: calc(var(--space-xl) * -1);
  margin-right: calc(var(--space-xl) * -1);
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
  border-radius: var(--space-sm);
}

.post-link {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-2xl);
  align-items: center;
  border: none;
}

/* Alternate image position - even posts have image on right */
.post-item:nth-child(even) .post-link {
  grid-template-columns: 1fr 200px;
}

.post-item:nth-child(even) .post-image-container {
  order: 2;
}

.post-item:nth-child(even) .post-content {
  order: 1;
}

.post-link:hover {
  opacity: 1;
}

.post-link--no-image {
  grid-template-columns: 1fr;
  max-width: 42rem;
}

.post-link--no-image .post-content {
  padding: var(--space-lg) 0;
}

.post-image-container {
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.post-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.post-item:hover .post-image {
  filter: grayscale(0%);
}

.post-header {
  display: flex;
  gap: var(--space-lg);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-600);
}

.post-category {
  font-weight: 500;
  transition: color 0.2s ease;
}

.post-item:hover .post-category {
  color: var(--color-orange);
}

.post-date {
  color: var(--color-gray-400);
}

.post-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.post-title {
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: var(--leading-tight);
  margin: 0;
}

.post-excerpt {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-700);
  margin: 0;
}

/* ===== Pagination ===== */
.pagination {
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: var(--border-width) solid var(--color-gray-200);
}

.pagination-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: nowrap;
}

.pagination-button,
.pagination-number {
  font-size: var(--text-sm);
  padding: var(--space-sm) var(--space-md);
  border: var(--border-width) solid var(--color-black);
  background: var(--color-white);
  color: var(--color-black);
  cursor: pointer;
  transition: all 0.2s ease;
  border-bottom: var(--border-width) solid var(--color-black);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 400;
}

.pagination-button:hover:not(:disabled),
.pagination-number:hover:not(.pagination-number--active) {
  background: var(--color-black);
  color: var(--color-white);
  opacity: 1;
}

.pagination-button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.pagination-number--active {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: var(--color-white);
  cursor: default;
}

.pagination-ellipsis {
  padding: var(--space-sm) var(--space-xs);
  color: var(--color-gray-400);
  border: none;
}

/* ===== Article Layout ===== */
.article-header {
  padding-bottom: 0;
  margin-bottom: 0;
}

.article-title {
  font-size: var(--text-4xl);
  font-weight: 300;
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  margin: 0;
}

.article-subtitle {
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: var(--leading-snug);
  color: var(--color-gray-500);
  margin-top: var(--space-xs);
}

.article-body {
  padding: 0 0 var(--space-5xl);
}

/* Release Info Box */
.release-info {
  margin: var(--space-xl) 0 var(--space-2xl) 0;
  border: var(--border-width) solid var(--color-gray-400);
  background: var(--color-white);
}

.info-content {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0;
}

.info-image {
  width: 200px;
  height: 200px;
  background: var(--color-black);
}

.info-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
  transition: filter 0.2s ease, opacity 0.2s ease;
  cursor: pointer;
}

.info-image img:hover {
  filter: grayscale(0%);
  opacity: 0.9;
}

.info-text {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.info-list {
  display: flex;
  gap: var(--space-2xl);
  flex-wrap: wrap;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.info-item dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-600);
}

.info-item dd {
  font-size: var(--text-base);
  color: var(--color-black);
}

.info-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.info-links a {
  font-size: var(--text-sm);
  color: var(--color-orange);
  border-bottom: var(--border-width) solid var(--color-orange);
  transition: opacity 0.2s ease;
  white-space: nowrap;
}

.info-links a:hover {
  opacity: 0.6;
}

/* Article Content Styles */
.article-content p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-lg);
  color: var(--color-gray-900);
}

.article-content h2 {
  font-size: var(--text-3xl);
  font-weight: 300;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-md);
}

.article-content h3 {
  font-size: var(--text-2xl);
  font-weight: 300;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-xl);
  padding-left: var(--space-xl);
}

.article-content li {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-sm);
}

.article-content blockquote {
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  font-style: italic;
  margin: var(--space-3xl) 0;
  padding-left: var(--space-2xl);
  border-left: 2px solid var(--color-black);
  color: var(--color-gray-700);
}

.article-content img {
  max-width: 100%;
  height: auto;
  margin: var(--space-3xl) 0;
  filter: grayscale(20%);
}

.article-content a {
  color: var(--color-black);
  border-bottom: var(--border-width) solid var(--color-black);
}

/* Article Footer */
.article-footer {
  padding-top: var(--space-4xl);
  border-top: var(--border-width) solid var(--color-gray-300);
}

.footer-nav {
  margin-top: var(--space-3xl);
}

.footer-nav a {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

.footer-nav a:hover {
  opacity: 1;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.lightbox.active {
  display: flex;
}

.lightbox-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  cursor: pointer;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  z-index: 1;
}

.lightbox-close {
  position: absolute;
  top: -50px;
  right: 0;
  background: none;
  border: none;
  font-size: var(--text-5xl);
  cursor: pointer;
  color: var(--color-black);
  line-height: 1;
  padding: 0;
  width: 50px;
  height: 50px;
  transition: opacity 0.2s ease;
}

.lightbox-close:hover {
  opacity: 0.6;
}

.lightbox-image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  filter: grayscale(0%);
}

/* ===== YouTube Modal ===== */
.youtube-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 10000;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
}

.youtube-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  cursor: pointer;
  z-index: 1;
}

.youtube-content {
  position: relative;
  width: 90vw;
  max-width: 1200px;
  z-index: 2;
}

.youtube-close {
  position: absolute;
  top: -50px;
  right: 0;
  background: none;
  border: none;
  font-size: 48px;
  cursor: pointer;
  color: white;
  line-height: 1;
  padding: 0;
  width: 50px;
  height: 50px;
  z-index: 3;
}

.youtube-close:hover {
  opacity: 0.6;
}

.youtube-player {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  background: black;
}

.youtube-player iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  .page {
    padding: var(--space-2xl) var(--space-lg);
  }
  
  .site-header {
    padding: var(--space-lg) 0;
  }
  
  .site-title {
    font-size: var(--text-base);
  }
  
  .post-link {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .post-item:hover {
    background-color: transparent;
    margin: 0;
    padding: var(--space-xl) 0;
  }
  
  .post-item:first-child {
    padding-top: 0;
  }
  
  .post-title {
    font-size: var(--text-xl);
  }
  
  .article-title {
    font-size: var(--text-2xl);
  }
  
  .article-subtitle {
    font-size: var(--text-lg);
  }
  
  .info-content {
    grid-template-columns: 1fr;
  }
  
  .info-image {
    width: 100%;
    height: 200px;
  }
  
  .info-text {
    padding: var(--space-md);
  }
  
  .info-list {
    flex-direction: column;
    gap: var(--space-md);
  }
}