@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@700;800;900&family=Inter:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;700;900&family=Noto+Serif+JP:wght@400;600;700&display=swap');

/* ==========================================================================
   Works Portfolio Stylesheet - LIBERTA DESIGN
   Contemporary Japanese digital creative portfolio design
   ========================================================================== */

:root {
  --bg-primary: #ffffff;
  --bg-subtle: #f7f7f8;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafa;
  --bg-dark: #0f1013;
  --bg-dark-panel: #16181d;
  
  --border-light: #e5e7eb;
  --border-medium: #d1d5db;
  --border-dark: #111111;
  --border-subtle: rgba(0, 0, 0, 0.06);

  --text-primary: #111111;
  --text-secondary: #4b5563;
  --text-muted: #888888;
  --text-inverse: #ffffff;
  --text-accent: #c5a059;

  --font-en: 'Archivo', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-jp: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Noto Serif JP', 'YuMincho', serif;

  --max-width-page: 1200px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-jp);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.8;
  font-size: 16px;
  letter-spacing: 0.02em;
  font-feature-settings: "palt";
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
}

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

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

.container {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 28px;
  width: 100%;
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  z-index: 100;
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.brand-logo {
  font-family: var(--font-en);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-logo span {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  background: var(--text-primary);
  color: #fff;
  border-radius: 4px;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-link {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-cta-btn {
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--text-primary);
  color: #fff;
  padding: 8px 18px;
  border-radius: 4px;
  transition: var(--transition);
}

.nav-cta-btn:hover {
  background: #333;
  color: #fff;
}

/* --- Breadcrumb --- */
.breadcrumb-nav {
  padding: 20px 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--text-primary);
}

.breadcrumb-sep {
  opacity: 0.5;
}

/* --- Hero Section --- */
.idx-hero {
  padding: 30px 0 50px;
  border-bottom: 1px solid var(--border-light);
}

.idx-hero-cat {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.idx-hero-title {
  font-family: var(--font-en);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.idx-hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 760px;
  line-height: 1.8;
}

/* --- Filters --- */
.idx-filters {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 30px 0 10px;
  margin-bottom: 20px;
  scrollbar-width: none;
}

.idx-filters::-webkit-scrollbar {
  display: none;
}

.idx-filter-btn {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 8px 18px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: 999px;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.idx-filter-btn:hover {
  background: #eee;
  color: var(--text-primary);
}

.idx-filter-btn.active {
  background: var(--text-primary);
  color: #fff;
  border-color: var(--text-primary);
}

/* --- Featured Demo Card (森の宿 & 凪の旅) --- */
.featured-section {
  margin-bottom: 50px;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.featured-card {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  background: var(--bg-dark);
  color: var(--text-inverse);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-smooth);
}

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 56px rgba(0, 0, 0, 0.25);
  border-color: rgba(197, 160, 89, 0.4);
}

.featured-media {
  position: relative;
  overflow: hidden;
  background: #000;
  min-height: 380px;
}

.featured-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.9);
  transition: transform 0.8s ease;
}

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

.featured-badge-overlay {
  position: absolute;
  top: 20px;
  left: 20px;
  background: rgba(15, 16, 19, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(197, 160, 89, 0.4);
  padding: 6px 14px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-accent);
}

.featured-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--text-accent);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.featured-info {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-accent);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.featured-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.2vw, 1.85rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
  color: #ffffff;
}

.featured-desc {
  font-size: 0.92rem;
  line-height: 1.8;
  color: #a39c92;
  margin-bottom: 24px;
}

.featured-scopes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
}

.scope-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  color: #e5e7eb;
}

.featured-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #c5a059;
  color: #0c0b0a;
  padding: 14px 28px;
  border-radius: 6px;
  font-family: var(--font-en);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: var(--transition);
  text-align: center;
}

.featured-btn:hover {
  background: #d7b572;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(197, 160, 89, 0.3);
}

/* --- Standard Works Grid --- */
.works-grid-section {
  margin-bottom: 80px;
}

.works-grid-title {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.works-grid-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

.works-cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 30px;
}

.work-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  overflow: hidden;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.work-item-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-dark);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}

.work-thumbnail-link {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #0f1013;
}

.work-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.work-item-card:hover .work-thumbnail {
  transform: scale(1.04);
}

.work-card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(17, 17, 17, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #fff;
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 4px;
}

.work-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.work-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-en);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.work-card-category {
  font-weight: 600;
  color: var(--text-secondary);
}

.work-card-heading {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.work-card-heading a:hover {
  text-decoration: underline;
}

.work-card-description {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex: 1;
}

.work-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.82rem;
}

.work-card-meta-detail {
  font-family: var(--font-en);
  color: var(--text-muted);
}

.work-card-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-en);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  transition: var(--transition);
}

.work-card-link-btn:hover {
  transform: translateX(3px);
}

.work-internal-tag {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 3px 8px;
  border-radius: 4px;
}

/* --- CTA Section --- */
.works-cta-section {
  background: var(--bg-dark);
  color: var(--text-inverse);
  border-radius: 12px;
  padding: 60px 40px;
  text-align: center;
  margin-bottom: 80px;
}

.works-cta-tag {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.works-cta-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.works-cta-desc {
  font-size: 1rem;
  color: #a39c92;
  max-width: 600px;
  margin: 0 auto 30px;
  line-height: 1.8;
}

.works-cta-btn {
  display: inline-block;
  background: #ffffff;
  color: #111111;
  padding: 14px 36px;
  border-radius: 6px;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  transition: var(--transition);
}

.works-cta-btn:hover {
  background: #e5e7eb;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Footer (Monotone Minimal - Consistent with Column & Main Site)
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border-dark);
  background: var(--bg-primary);
  padding: 56px 0 36px;
  margin-top: 80px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav-list a {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.footer-nav-list a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* --- Responsive Adjustments --- */
@media (max-width: 900px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-media {
    min-height: 260px;
  }
  .featured-info {
    padding: 30px 24px;
  }
  .works-cards-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    gap: 24px;
  }
  .footer-nav-list {
    gap: 14px 18px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .nav-inner {
    height: 60px;
  }
  .idx-hero {
    padding: 24px 0 36px;
  }
  .idx-hero-title {
    font-size: 2.2rem;
  }
  .works-cta-section {
    padding: 40px 20px;
  }
}