/* ===== Japanese Minimalist Design System ===== */
:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f0f0f0;
  --color-text: #1a1a1a;
  --color-text-light: #666;
  --color-accent: #2d2d2d;
  --color-border: #e0e0e0;
  --color-hover: #c9a962;
  --font-sans: 'Zen Kaku Gothic New', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Noto Serif TC', Georgia, serif;
  --spacing-unit: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-weight: 300;
  letter-spacing: 0.02em;
}

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

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

a:hover {
  color: var(--color-hover);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo-img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-btn {
  background: none;
  border: none;
  font-size: 0.8rem;
  color: var(--color-text-light);
  cursor: pointer;
  padding: 0.25rem;
  transition: color var(--transition);
}

.lang-btn:hover,
.lang-btn.active {
  color: var(--color-text);
}

.lang-divider {
  color: var(--color-border);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-inner {
    padding: 1rem 1.5rem;
  }
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  position: relative;
  background: var(--color-bg);
}

.hero-vertical-text {
  position: absolute;
  left: 2rem;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: left center;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--color-text-light);
  white-space: nowrap;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo {
  width: clamp(180px, 25vw, 300px);
  margin-bottom: 2rem;
}

.hero-tagline {
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
}

.hero-line {
  width: 1px;
  height: 60px;
  background: var(--color-border);
  margin-bottom: 2.5rem;
}

.btn-minimal {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--color-text);
  transition: all var(--transition);
}

.btn-minimal:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.scroll-hint {
  position: absolute;
  bottom: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-light);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  cursor: pointer;
}

.scroll-icon {
  width: 20px;
  height: 20px;
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

@media (max-width: 768px) {
  .hero-vertical-text {
    display: none;
  }
}

/* ===== Sections ===== */
.section {
  padding: 6rem 2rem;
}

.section-alt {
  background: var(--color-bg-alt);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.container-narrow {
  max-width: 700px;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* ===== About ===== */
.about-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
  font-size: 1rem;
  line-height: 2;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-top: 0.5rem;
}

.stat {
  text-align: right;
  border-right: 1px solid var(--color-border);
  padding-right: 1.5rem;
}

.stat-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .about-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .about-stats {
    flex-direction: row;
    justify-content: space-around;
  }
  .stat {
    text-align: center;
    border-right: none;
    padding-right: 0;
  }
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
}

.service-card {
  background: var(--color-bg);
  padding: 3rem 2rem;
  position: relative;
  transition: background var(--transition);
}

.service-card:hover {
  background: var(--color-bg-alt);
}

.service-number {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-light);
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  margin-bottom: 1rem;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Corporate Clients ===== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--color-border);
}

.client-item {
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  transition: background var(--transition);
}

.client-item:hover {
  background: var(--color-bg-alt);
}

.client-item img {
  max-width: 160px;
  max-height: 64px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.5);
  transition: filter var(--transition);
}

.client-item:hover img {
  filter: grayscale(0%) opacity(1);
}

@media (max-width: 992px) {
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .client-item {
    padding: 1.5rem 1rem;
  }
  .client-item img {
    max-width: 100px;
    max-height: 40px;
  }
}

/* ===== Portfolio ===== */
.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-text);
  color: var(--color-text);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.portfolio-item {
  aspect-ratio: 4/3;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), filter var(--transition);
  filter: grayscale(20%);
}

.portfolio-item:hover img {
  transform: scale(1.03);
  filter: grayscale(0%);
}

.portfolio-item.hidden {
  display: none;
}

/* ===== Music ===== */
.music-card {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: 3rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.music-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.music-artist {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.music-desc {
  font-size: 0.8rem;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.streaming-platforms {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.platform-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  transition: color var(--transition), transform var(--transition);
}

.platform-link:hover {
  color: var(--color-text);
  transform: translateY(-2px);
}

.platform-link svg {
  width: 24px;
  height: 24px;
}

.music-player {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.audio-element {
  width: 100%;
  height: 40px;
}

/* ===== Social ===== */
.social-card {
  text-align: center;
  padding: 4rem 2rem;
}

.social-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.instagram-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 1rem;
}

.instagram-icon {
  width: 28px;
  height: 28px;
}

.social-desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.instagram-embed-wrapper {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

/* ===== Contact ===== */
.contact-desc {
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition);
}

.contact-link:hover {
  border-color: var(--color-text);
}

.contact-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-logo {
  height: 40px;
  width: auto;
  opacity: 0.6;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(250, 250, 250, 0.98);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: 90%;
  max-height: 85vh;
  object-fit: contain;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-text-light);
  cursor: pointer;
  transition: color var(--transition);
  padding: 1rem;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  color: var(--color-text);
}

.lightbox-close {
  top: 1rem;
  right: 1rem;
}

.lightbox-prev {
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
}