/* ========== Base ========== */
:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2a2a2a;
  --bg-elevated: #222222;
  --border: #333333;
  --text-primary: #f5f5f5;
  --text-secondary: #a8a8a8;
  --text-muted: #707070;
  --gold: #d4af37;
  --gold-deep: #b8960c;
  --gold-glow: rgba(212, 175, 55, 0.15);
  --max-width: 1200px;
  --radius: 4px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

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

/* ========== Logo (SVG) ========== */
.yue-logo {
  width: 56px;
  height: 56px;
  color: var(--gold);
  flex-shrink: 0;
}

.yue-logo--large {
  width: 120px;
  height: 120px;
}

/* ========== Lock Screen (index.html) ========== */
.lock-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse at top, rgba(212, 175, 55, 0.06), transparent 60%),
    var(--bg-primary);
}

.lock-card {
  width: 100%;
  max-width: 420px;
  padding: 56px 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lock-card__logo {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}

.lock-card__title {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.2em;
  margin-bottom: 8px;
}

.lock-card__subtitle {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.3em;
  margin-bottom: 40px;
  text-transform: uppercase;
}

.lock-card__form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lock-card__input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 15px;
  letter-spacing: 0.1em;
  text-align: center;
  transition: border-color var(--transition);
}

.lock-card__input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

.lock-card__submit {
  width: 100%;
  padding: 14px 16px;
  background: var(--gold);
  border: none;
  border-radius: var(--radius);
  color: var(--bg-primary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: background var(--transition);
}

.lock-card__submit:hover {
  background: var(--gold-deep);
}

.lock-card__error {
  font-size: 12px;
  color: #e06666;
  letter-spacing: 0.1em;
  min-height: 18px;
  margin-top: 4px;
}

.lock-card__hint {
  margin-top: 32px;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.2em;
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(26, 26, 26, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-brand .yue-logo {
  width: 40px;
  height: 40px;
}

.site-brand__name {
  font-size: 14px;
  letter-spacing: 0.25em;
  font-weight: 500;
}

.site-brand__sub {
  display: block;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  margin-top: 2px;
}

.site-nav {
  display: flex;
  gap: 28px;
}

.site-nav a {
  font-size: 13px;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--gold);
}

.site-nav a.is-active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gold);
}

.site-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
}

/* ========== Hero ========== */
.hero {
  padding: 120px 32px 80px;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero__logo {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.hero__title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 300;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.hero__title-en {
  display: block;
  font-size: 14px;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 16px;
  font-weight: 400;
}

.hero__role {
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero__lead {
  max-width: 640px;
  margin: 32px auto 0;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 2;
}

/* ========== Section ========== */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 32px;
}

.section__head {
  text-align: center;
  margin-bottom: 56px;
}

.section__eyebrow {
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section__title {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 500;
  letter-spacing: 0.2em;
}

.section__divider {
  width: 40px;
  height: 1px;
  background: var(--gold);
  margin: 20px auto 0;
}

/* ========== Career Cards ========== */
.career-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.career-card {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}

.career-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.career-card__image {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #2f2f2f, #1f1f1f);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.3em;
  position: relative;
  overflow: hidden;
}

.career-card__image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.5));
}

.career-card__image-placeholder {
  position: relative;
  z-index: 1;
}

.career-card__body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.career-card__period {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--gold);
}

.career-card__company {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.career-card__role {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
}

.career-card__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-top: 4px;
}

.career-card__more {
  margin-top: auto;
  padding-top: 16px;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.career-card__more::after {
  content: '→';
  transition: transform var(--transition);
}

.career-card:hover .career-card__more::after {
  transform: translateX(4px);
}

/* ========== Works Preview Grid ========== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.works-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition), background var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 200px;
}

.works-card:hover {
  border-color: var(--gold);
  background: var(--bg-elevated);
}

.works-card__label {
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--gold);
}

.works-card__title {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.15em;
}

.works-card__desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.8;
  flex: 1;
}

.works-card__arrow {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  transition: color var(--transition);
}

.works-card:hover .works-card__arrow {
  color: var(--gold);
}

/* ========== Footer ========== */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 40px 32px;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.2em;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .site-header__inner {
    padding: 14px 20px;
    gap: 16px;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .site-nav.is-open {
    transform: translateY(0);
  }

  .site-nav a {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
  }

  .site-nav a:last-child {
    border-bottom: none;
  }

  .site-nav-toggle {
    display: block;
  }

  .hero {
    padding: 80px 20px 60px;
  }

  .section {
    padding: 60px 20px;
  }

  .career-card__body {
    padding: 20px;
  }
}

/* ========== Page Hero (sub-pages) ========== */
.page-hero {
  padding: 100px 32px 60px;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.page-hero__eyebrow {
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.page-hero__title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 300;
  letter-spacing: 0.2em;
  margin-bottom: 8px;
}

.page-hero__title-sub {
  display: block;
  font-size: 12px;
  letter-spacing: 0.35em;
  color: var(--text-secondary);
  margin-top: 10px;
  font-weight: 400;
}

.page-hero__lead {
  max-width: 680px;
  margin: 28px auto 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 2;
}

/* ========== Back Link ========== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
  padding: 8px 0;
  transition: color var(--transition);
}

.back-link::before {
  content: '←';
  transition: transform var(--transition);
}

.back-link:hover {
  color: var(--gold);
}

.back-link:hover::before {
  transform: translateX(-4px);
}

/* ========== Career Timeline ========== */
.career-timeline {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.career-entry {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  transition: background var(--transition);
}

.career-entry:hover {
  background: var(--bg-elevated);
}

.career-entry__logo {
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, #2f2f2f, #1f1f1f);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-align: center;
  padding: 8px;
}

.career-entry__period {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 10px;
}

.career-entry__company {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
  line-height: 1.5;
}

.career-entry__company-en {
  display: block;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 400;
}

.career-entry__role {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.career-entry__desc {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 2;
  margin-bottom: 18px;
}

.career-entry__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.career-entry__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.career-entry__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

/* ========== Project Overview ========== */
.project-overview {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  padding: 36px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.project-overview__meta {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-right: 32px;
  border-right: 1px solid var(--border);
}

.info-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-row__label {
  font-size: 10px;
  letter-spacing: 0.35em;
  color: var(--gold);
  text-transform: uppercase;
}

.info-row__value {
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.8;
}

.project-overview__body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 2;
}

.project-overview__body p + p {
  margin-top: 16px;
}

/* ========== Subsection ========== */
.subsection {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 32px;
}

.subsection + .subsection {
  padding-top: 0;
}

.subsection-head {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
}

.subsection-head__num {
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--gold);
  font-family: Georgia, serif;
  font-style: italic;
}

.subsection-head__title {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.15em;
}

.subsection-head__sub {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.35em;
  margin-left: auto;
}

.subsection__body {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.subsection__desc {
  max-width: 760px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 2;
}

.subsection__subtitle {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--text-primary);
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  margin-bottom: -12px;
}

/* ========== Gallery Grid ========== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}

.gallery-grid--wide {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.gallery-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 20px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, #2f2f2f, #1f1f1f);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.gallery-item:hover {
  border-color: var(--gold);
}

.gallery-item--wide {
  aspect-ratio: 16 / 9;
}

.gallery-item--tall {
  aspect-ratio: 3 / 4;
}

.gallery-item__label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-align: center;
  padding: 12px;
}

/* ========== Video Embed (Vimeo) ========== */
.video-embed {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #262626, #161616);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-embed__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.3em;
}

.video-embed__placeholder::before {
  content: '▶';
  color: var(--gold);
  font-size: 24px;
  line-height: 1;
}

.video-embed__placeholder small {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ========== Responsive additions ========== */
@media (max-width: 768px) {
  .page-hero {
    padding: 64px 20px 40px;
  }

  .career-entry {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px;
  }

  .career-entry__logo {
    max-width: 100px;
  }

  .project-overview {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 24px;
  }

  .project-overview__meta {
    padding-right: 0;
    padding-bottom: 24px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .subsection {
    padding: 48px 20px;
  }

  .subsection-head__sub {
    margin-left: 0;
    width: 100%;
  }
}

/* ========== Gallery In-Page Nav ========== */
.gallery-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 32px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: center;
  border-bottom: 1px solid var(--border);
}

.gallery-nav a {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--text-secondary);
  text-transform: uppercase;
  padding: 6px 4px;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.gallery-nav a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ========== Video Grid (for animation page) ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 20px;
}

.video-grid .video-embed {
  max-width: none;
  margin: 0;
}

.video-embed__caption {
  position: absolute;
  bottom: 12px;
  left: 12px;
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
  background: rgba(0, 0, 0, 0.6);
  padding: 4px 10px;
  border-radius: 2px;
  z-index: 2;
  pointer-events: none;
}

@media (max-width: 768px) {
  .gallery-nav {
    padding: 24px 20px 20px;
    gap: 20px;
  }
}