/* ===== Variables ===== */
:root {
  --color-bg: #0f0f0f;
  --color-bg-alt: #1a1a1a;
  --color-text: #f0ece4;
  --color-text-muted: #9a9590;
  --color-accent: #c8a97e;
  --color-accent-hover: #dbbf94;
  --font-serif: 'Cormorant Garamond', 'Noto Serif TC', serif;
  --font-sans: 'Noto Sans TC', sans-serif;
  --nav-height: 72px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 2.5rem;
  transition: background var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(15, 15, 15, 0.85);
  backdrop-filter: blur(12px);
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.nav__logo span {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  gap: 2.5rem;
}

.nav__links a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav__links a:hover {
  color: var(--color-text);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.05);
  animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
  from { transform: scale(1.05); }
  to   { transform: scale(1.12); }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(15, 15, 15, 0.3) 0%,
    rgba(15, 15, 15, 0.5) 50%,
    rgba(15, 15, 15, 0.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 2rem;
  animation: fadeUp 1.2s ease-out;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__tag {
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto 2.5rem;
}

.hero__cta {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: all var(--transition);
}

.hero__cta:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: fadeUp 1.2s ease-out 0.5s both;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: var(--color-text-muted);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(0); transform-origin: top; }
  50%      { transform: scaleY(1); transform-origin: top; }
  51%      { transform: scaleY(1); transform-origin: bottom; }
  100%     { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== Section Headers ===== */
.section-header {
  margin-bottom: 3rem;
}

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

.section-tag {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--color-text-muted);
  font-weight: 300;
  max-width: 520px;
}

.section-header--center .section-desc {
  margin: 0 auto;
}

/* ===== Gallery ===== */
.gallery {
  padding: 8rem 0;
}

.gallery__filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: none;
  border: 1px solid rgba(240, 236, 228, 0.15);
  color: var(--color-text-muted);
  padding: 0.5rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition);
}

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

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  grid-auto-rows: 280px;
}

.gallery__item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border-radius: 2px;
}

.gallery__item--wide {
  grid-column: span 2;
}

.gallery__item--tall {
  grid-row: span 2;
}

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

.gallery__item:hover img {
  transform: scale(1.06);
}

.gallery__item-info {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(15, 15, 15, 0.75) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery__item:hover .gallery__item-info {
  opacity: 1;
}

.gallery__item-info h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
}

.gallery__item-info p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.gallery__item.hidden {
  display: none;
}

/* ===== About ===== */
.about {
  padding: 8rem 0;
  background: var(--color-bg-alt);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__image {
  overflow: hidden;
  border-radius: 2px;
  aspect-ratio: 4 / 5;
}

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

.about__text p {
  color: var(--color-text-muted);
  font-weight: 300;
  margin-bottom: 1.25rem;
}

.about__stats {
  display: flex;
  gap: 3rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(240, 236, 228, 0.1);
}

.about__stats li {
  display: flex;
  flex-direction: column;
}

.about__stats strong {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 400;
  color: var(--color-accent);
  line-height: 1.2;
}

.about__stats span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* ===== Contact ===== */
.contact {
  padding: 8rem 0;
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.contact__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2.5rem 1.5rem;
  border: 1px solid rgba(240, 236, 228, 0.1);
  border-radius: 2px;
  transition: border-color var(--transition), transform var(--transition);
  text-align: center;
}

a.contact__card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.contact__card svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.contact__card span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ===== Footer ===== */
.footer {
  padding: 2.5rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(240, 236, 228, 0.08);
}

.footer p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer__note {
  margin-top: 0.4rem;
  font-size: 0.7rem;
  opacity: 0.6;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

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

.lightbox__content {
  max-width: 90vw;
  max-height: 85vh;
  text-align: center;
}

.lightbox__content img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox__caption {
  margin-top: 1rem;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-text-muted);
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 2rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition);
  z-index: 201;
  line-height: 1;
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
  opacity: 1;
}

.lightbox__close {
  top: 1.5rem;
  right: 2rem;
  font-size: 2.5rem;
}

.lightbox__prev {
  left: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
}

.lightbox__next {
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .gallery__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 220px;
  }

  .gallery__item--wide {
    grid-column: span 2;
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about__image {
    aspect-ratio: 16 / 10;
  }

  .contact__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(12px);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .nav__links.open {
    transform: translateY(0);
  }

  .nav__toggle {
    display: flex;
  }

  .gallery__grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 260px;
  }

  .gallery__item--wide,
  .gallery__item--tall {
    grid-column: span 1;
    grid-row: span 1;
  }

  .about__stats {
    gap: 2rem;
  }

  .hero__title {
    font-size: 2.4rem;
  }
}