/* =============================================
   AMOS LEE — Personal Website
   Style: Dark, Cinematic, Minimal
   ============================================= */

:root {
  --black:      #0a0a0a;
  --dark:       #111111;
  --dark-mid:   #1a1a1a;
  --mid:        #2a2a2a;
  --gray:       #666666;
  --light-gray: #aaaaaa;
  --white:      #f0ede8;
  --accent:     #c8a96e;   /* warm gold */
  --accent2:    #8fb3c8;   /* cool blue */
  --font-en:    'Cormorant Garamond', 'Georgia', serif;
  --font-zh:    'Noto Serif TC', 'STSong', serif;
  --font-ui:    'Inter', 'Helvetica Neue', sans-serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
  font-family: var(--font-ui);
  background-color: var(--black);
  color: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ── */
h1, h2, h3 {
  font-family: var(--font-en);
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.zh { font-family: var(--font-zh); font-weight: 300; }

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

/* ── Navigation ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.8rem 5%;
  background: rgba(10, 10, 10, 0);
  backdrop-filter: blur(0px);
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

nav.scrolled {
  padding: 1.2rem 5%;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-logo {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--white);
}

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

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--light-gray);
  transition: color var(--transition);
  position: relative;
}

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

.nav-links a:hover,
.nav-links a.active { color: var(--white); }

.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* Lang toggle */
.lang-toggle {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--gray);
  cursor: pointer;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--mid);
  transition: all var(--transition);
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 1px;
  background: var(--white);
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 5% 8vh;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 30%;
  filter: brightness(0.45);
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero-bg.loaded { transform: scale(1); }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10,10,10,0.95) 0%,
    rgba(10,10,10,0.3) 50%,
    rgba(10,10,10,0.1) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  font-family: var(--font-ui);
}

.hero h1 {
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 300;
  line-height: 1;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.hero-sub {
  font-size: 1rem;
  color: var(--light-gray);
  margin-bottom: 3rem;
  font-family: var(--font-zh);
  letter-spacing: 0.1em;
}

.hero-sub .en {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: block;
  margin-top: 0.4rem;
  color: var(--gray);
}

.hero-cta {
  display: inline-flex;
  gap: 1.5rem;
  align-items: center;
}

.btn {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-family: var(--font-ui);
  transition: all var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--black);
  border: 1px solid var(--accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
}

.btn-outline {
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--white);
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.05);
}

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  right: 5%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--gray);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.scroll-indicator::after {
  content: '';
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--gray), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(0.5); }
}

/* ── Sections ── */
section { padding: 8rem 5%; }

.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  font-family: var(--font-ui);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  margin-bottom: 0.5rem;
  color: var(--white);
}

.section-title-zh {
  font-family: var(--font-zh);
  font-size: clamp(1rem, 2vw, 1.4rem);
  color: var(--gray);
  margin-bottom: 3rem;
  font-weight: 300;
}

.divider {
  width: 60px;
  height: 1px;
  background: var(--accent);
  margin: 2rem 0;
}

/* ── About Preview ── */
.about-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.about-img-wrap {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
}

.about-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
  transition: transform 0.8s ease, filter 0.8s ease;
}

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

.about-img-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(200, 169, 110, 0.2);
  z-index: 1;
  pointer-events: none;
}

.about-text p {
  color: var(--light-gray);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}

.about-text p.zh {
  font-family: var(--font-zh);
  font-size: 1rem;
  color: var(--gray);
}

/* ── Portfolio Grid ── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 300px;
  gap: 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.portfolio-item:nth-child(1) { grid-column: span 7; grid-row: span 2; }
.portfolio-item:nth-child(2) { grid-column: span 5; }
.portfolio-item:nth-child(3) { grid-column: span 5; }
.portfolio-item:nth-child(4) { grid-column: span 4; }
.portfolio-item:nth-child(5) { grid-column: span 4; }
.portfolio-item:nth-child(6) { grid-column: span 4; }

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
  filter: brightness(0.7) grayscale(15%);
}

.portfolio-item:hover img {
  transform: scale(1.06);
  filter: brightness(0.85) grayscale(0%);
}

.portfolio-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 2rem 1.5rem 1.5rem;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  transform: translateY(100%);
  transition: transform var(--transition);
}

.portfolio-item:hover .portfolio-caption { transform: translateY(0); }

.portfolio-caption h3 {
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.portfolio-caption p {
  font-size: 0.8rem;
  color: var(--light-gray);
  letter-spacing: 0.1em;
}

/* ── Music Section ── */
.music-section { background: var(--dark); }

.music-list {
  max-width: 900px;
  margin: 0 auto;
}

.music-item {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--mid);
  transition: all var(--transition);
}

.music-item:hover { padding-left: 1rem; border-color: var(--accent); }

.music-num {
  font-family: var(--font-en);
  font-size: 1.5rem;
  color: var(--mid);
  min-width: 2.5rem;
  transition: color var(--transition);
}

.music-item:hover .music-num { color: var(--accent); }

.music-info { flex: 1; }

.music-title {
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 0.2rem;
}

.music-meta {
  font-size: 0.78rem;
  color: var(--gray);
  letter-spacing: 0.1em;
}

.music-duration {
  font-size: 0.85rem;
  color: var(--gray);
  font-family: var(--font-ui);
}

/* ── Contact Section ── */
.contact-section {
  text-align: center;
  background: var(--dark-mid);
}

.contact-section .section-title { margin-bottom: 1rem; }

.contact-email {
  display: inline-block;
  font-family: var(--font-en);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 300;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin: 2rem 0 3rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.contact-email:hover { border-color: var(--accent); }

/* ── Footer ── */
footer {
  padding: 3rem 5%;
  border-top: 1px solid var(--mid);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-en);
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  color: var(--gray);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--gray);
  letter-spacing: 0.1em;
}

.footer-social {
  display: flex;
  gap: 1.5rem;
}

.footer-social a {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color var(--transition);
}
.footer-social a:hover { color: var(--accent); }

/* ── Page Hero (inner pages) ── */
.page-hero {
  height: 50vh;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  padding: 0 5% 6vh;
  position: relative;
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,10,0.9) 0%, transparent 60%);
}

.page-hero-content {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  font-size: clamp(2.5rem, 5vw, 5rem);
  font-weight: 300;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.page-hero .subtitle {
  font-family: var(--font-zh);
  font-size: 1rem;
  color: var(--gray);
  letter-spacing: 0.15em;
}

/* ── About Page ── */
.about-page { max-width: 1100px; margin: 0 auto; }

.about-page .bio-grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 5rem;
  align-items: start;
  margin-bottom: 6rem;
}

.bio-portrait {
  position: sticky;
  top: 100px;
}

.bio-portrait img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
  filter: grayscale(10%);
}

.bio-text h2 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.bio-text .name-zh {
  font-family: var(--font-zh);
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 2rem;
  display: block;
}

.bio-text p {
  color: var(--light-gray);
  font-size: 1.05rem;
  line-height: 1.95;
  margin-bottom: 1.5rem;
}

.bio-text p.zh {
  font-family: var(--font-zh);
  font-size: 1rem;
  color: var(--gray);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.skill-item {
  padding: 2rem;
  border: 1px solid var(--mid);
  transition: border-color var(--transition);
}

.skill-item:hover { border-color: var(--accent); }

.skill-item h4 {
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 0.8rem;
}

.skill-item p {
  font-size: 0.85rem;
  color: var(--gray);
  line-height: 1.7;
}

/* ── Portfolio Page ── */
.portfolio-page { max-width: 1400px; margin: 0 auto; }

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

.filter-btn {
  padding: 0.5rem 1.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--mid);
  color: var(--gray);
  cursor: pointer;
  transition: all var(--transition);
  background: none;
  font-family: var(--font-ui);
}

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

.portfolio-full-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.5rem;
}

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

.portfolio-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
  filter: brightness(0.75);
}

.portfolio-card:hover img {
  transform: scale(1.06);
  filter: brightness(0.9);
}

.portfolio-card-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 2rem 1.5rem 1.5rem;
  background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
  transform: translateY(30%);
  transition: transform var(--transition);
}

.portfolio-card:hover .portfolio-card-info { transform: translateY(0); }

.portfolio-card-info h3 {
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.portfolio-card-info .tag {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ── Contact Page ── */
.contact-page {
  max-width: 800px;
  margin: 0 auto;
}

.contact-form {
  margin-top: 3rem;
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.8rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--dark-mid);
  border: 1px solid var(--mid);
  color: var(--white);
  padding: 1rem 1.2rem;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group textarea { height: 160px; resize: vertical; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.95);
  justify-content: center;
  align-items: center;
}

.lightbox.open { display: flex; }

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

.lightbox-close {
  position: absolute;
  top: 2rem; right: 2rem;
  font-size: 2rem;
  color: var(--white);
  cursor: pointer;
  line-height: 1;
  opacity: 0.6;
  transition: opacity var(--transition);
}
.lightbox-close:hover { opacity: 1; }

/* ── Animations ── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .about-preview { grid-template-columns: 1fr; gap: 3rem; }
  .about-page .bio-grid { grid-template-columns: 1fr; }
  .bio-portrait { position: static; }
  .portfolio-item:nth-child(n) { grid-column: span 6; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--black);
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    font-size: 1.2rem;
  }
  .portfolio-grid { grid-template-columns: 1fr; grid-auto-rows: 250px; }
  .portfolio-item:nth-child(n) { grid-column: span 1; grid-row: span 1; }
  .portfolio-full-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  footer { flex-direction: column; text-align: center; }
}