:root {
  --bg: #121212;
  --bg-elevated: #1a1a1a;
  --text: #ededed;
  --text-dim: #8a8a8a;
  --text-faint: #5a5a5a;
  --accent: #c9a876;
  --border: #2a2a2a;
  --font-display: "Helvetica Neue", "Noto Sans TC", sans-serif;
  --font-body: "Helvetica Neue", "Noto Sans TC", sans-serif;
  --font-mono: "Courier New", monospace;
  --maxw: 1320px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 32px 48px;
  background: linear-gradient(to bottom, rgba(18,18,18,0.97), rgba(18,18,18,0));
  backdrop-filter: blur(6px);
}

.site-header .logo {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.site-header nav {
  display: flex;
  gap: 36px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-header nav a {
  color: var(--text-dim);
  transition: color 0.2s ease;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
}

.site-header nav a:hover,
.site-header nav a.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* ===== Layout ===== */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 48px 120px;
}

.page-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.01em;
  margin: 0 0 48px;
  line-height: 1.2;
}

.page-subtitle {
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.04em;
  margin: 0 0 48px;
}

/* ===== Category grid (home) ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 24px;
  margin-top: 16px;
}

@media (max-width: 1000px) {
  .category-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .category-grid { grid-template-columns: 1fr; }
}

.category-card {
  display: block;
}

.category-thumb {
  position: relative;
  aspect-ratio: 4/3;
  background: var(--bg-elevated);
  overflow: hidden;
}

.category-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.5s ease;
  filter: saturate(0.9);
}

.category-card:hover .category-thumb img {
  transform: scale(1.04);
  filter: saturate(1.1);
}

.category-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: opacity 0.3s ease, background 0.3s ease;
}

.category-card:hover .category-overlay {
  opacity: 1;
  background: rgba(10,10,10,0.55);
}

.category-overlay-text {
  text-align: center;
  transform: translateY(8px);
  transition: transform 0.35s ease;
}

.category-card:hover .category-overlay-text {
  transform: translateY(0);
}

.category-overlay-text h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
  color: var(--text);
}

.category-overlay-text .category-overlay-zh {
  display: block;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-top: 8px;
}

.category-info {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-top: 16px;
}

.category-info h2 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.category-card:hover .category-info h2 {
  color: var(--accent);
}

.category-count {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ===== Hero ===== */
.hero {
  padding: 100px 48px 56px;
  max-width: var(--maxw);
  margin: 0 auto;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 12px;
  line-height: 1.15;
}

.hero p {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 560px;
  line-height: 1.7;
  margin: 0;
  letter-spacing: 0.01em;
}

/* ===== Work grid (category page) ===== */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 24px;
}

@media (max-width: 1000px) {
  .work-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .work-grid { grid-template-columns: 1fr; }
}

.work-card {
  display: block;
}

.work-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--bg-elevated);
  overflow: hidden;
  border: 1px solid var(--border);
}

.work-thumb img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, opacity 0.3s ease;
}

.work-card:hover .work-thumb img {
  transform: scale(1.03);
}

.work-thumb.previewing img {
  opacity: 0;
}

.work-thumb.preview-loading::after {
  content: '';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  z-index: 3;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.work-thumb-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1f1f1f, #161616);
}

.work-preview-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  z-index: 1;
}

.work-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0) 55%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
  pointer-events: none;
}

.work-card:hover .work-overlay {
  opacity: 1;
}

.work-overlay-text {
  transform: translateY(8px);
  transition: transform 0.35s ease;
}

.work-card:hover .work-overlay-text {
  transform: translateY(0);
}

.work-overlay-text h2 {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
  color: var(--text);
}

.work-overlay-meta {
  display: block;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-top: 6px;
}

/* ===== Work detail page ===== */
.work-detail-video {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  margin-bottom: 32px;
}

.work-detail-video iframe {
  position: absolute;
  top:0; left:0;
  width: 100%; height: 100%;
  border: 0;
}

.work-detail-info {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 64px;
}

@media (max-width: 800px) {
  .work-detail-info { grid-template-columns: 1fr; gap: 32px; }
}

.work-detail-info h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.4;
  margin: 0 0 14px;
}

.work-detail-year {
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.detail-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 14px;
}

.work-detail-fields {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.field-dropdown {
  position: relative;
}

.field-trigger {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  width: 100%;
  background: none;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 0 0 14px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: var(--font-body);
  transition: border-color 0.2s ease;
}

.field-trigger:hover,
.field-trigger.open {
  border-color: var(--accent);
}

.field-trigger .detail-label {
  margin: 0;
}

.field-trigger .field-value {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.field-trigger .chevron {
  position: absolute;
  top: 2px;
  right: 0;
  color: var(--text-dim);
  transition: transform 0.2s ease, color 0.2s ease;
}

.field-trigger.open .chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.dropdown-menu {
  display: none;
  flex-direction: column;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  z-index: 10;
  max-height: 280px;
  overflow-y: auto;
}

.dropdown-menu.open {
  display: flex;
}

.dropdown-item {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
  transition: background 0.15s ease, color 0.15s ease;
}

.dropdown-item:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.dropdown-item.current {
  color: var(--accent);
}

/* ===== Breadcrumb / back link ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 110px 0 48px;
  transition: color 0.2s ease;
}

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

/* ===== Role filter banner ===== */
.role-banner {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 20px 28px;
  margin-bottom: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.role-banner .role-banner-text {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  line-height: 1.7;
}

.role-banner .role-banner-text strong {
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
}

.role-banner a.clear {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 100px;
}

.role-banner a.clear:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ===== About page ===== */

.about-hero {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-top: -97px;
}

.about-hero-b {
  height: 100vh;
  min-height: 600px;
}

.about-hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(18,18,18,0.1) 0%, rgba(18,18,18,0.15) 45%, rgba(18,18,18,0.92) 100%);
}

.about-hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 48px;
}

.about-hero-content-bottom {
  justify-content: flex-end;
  padding-bottom: 56px;
}

.about-intro {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
  margin: 0 0 24px;
  letter-spacing: 0.01em;
  max-width: 640px;
}

.about-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.about-skill {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  padding: 7px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  backdrop-filter: blur(4px);
}

.about-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-link {
  font-size: 15px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  width: fit-content;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.about-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

@media (max-width: 700px) {
  .about-hero-content { padding: 0 24px; }
  .about-hero-content-bottom { padding-bottom: 40px; }
}


/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-faint);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

@media (max-width: 700px) {
  .site-header, .container, .hero, .site-footer { padding-left: 24px; padding-right: 24px; }
  .work-detail-info { gap: 24px; }
}

/* empty state */
.empty-state {
  color: var(--text-dim);
  font-size: 15px;
  padding: 40px 0;
}