/* --- Variables --- */
:root {
  --bg: #0d0c0b;
  --bg-soft: #161412;
  --surface: #1e1c19;
  --text: #f5f2ed;
  --text-muted: #a89f94;
  --accent: #c9a962;
  --accent-dim: rgba(201, 169, 98, 0.4);
  --border: rgba(201, 169, 98, 0.15);
  --font-display: "Cormorant Garamond", "Times New Roman", serif;
  --font-body: "Outfit", "Segoe UI", sans-serif;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* 若隱若現的斜向真實鋼琴琴鍵背景（可改用本地圖：url('piano-keys.jpg')）*/
.bg-piano-keys {
  position: fixed;
  inset: -60%;
  z-index: -1;
  overflow: hidden;
  background: var(--bg);
  background-image:
    linear-gradient(rgba(13, 12, 11, 0.88), rgba(13, 12, 11, 0.88)),
    url("https://images.unsplash.com/photo-1520523839897-bd0b52f945a0?auto=format&fit=crop&w=1920");
  background-size: cover;
  background-position: center;
  transform: skewY(-10deg) rotate(-7deg);
  transform-origin: center center;
  pointer-events: none;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Header & Nav --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: background 0.3s ease, padding 0.3s ease;
}

.header.scrolled {
  background: rgba(13, 12, 11, 0.92);
  backdrop-filter: blur(8px);
}

.nav {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-muted);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 6rem 1.5rem 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 20%, var(--accent-dim) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  pointer-events: none;
}

.hero-photo {
  position: relative;
  z-index: 1;
  margin-bottom: 2rem;
  width: clamp(140px, 22vw, 200px);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border);
  box-shadow: 0 0 0 1px var(--accent-dim);
  background: var(--surface);
}

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

.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 12vw, 6.5rem);
  font-weight: 600;
  line-height: 1.05;
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 0 2.5rem;
  letter-spacing: 0.1em;
}

.hero-cta {
  display: inline-block;
  padding: 0.75rem 2rem;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.hero-cta:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--text);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-hint span {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollHint 2s ease-in-out infinite;
}

@keyframes scrollHint {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* --- Sections --- */
.section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 2.5rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  align-items: start;
}

.about-image-placeholder {
  aspect-ratio: 3/4;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--accent-dim);
  font-family: var(--font-display);
}

.about-text .lead {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--text);
  margin: 0 0 1.5rem;
}

.about-text p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* --- Repertoire（曲目與演出：跨瀏覽器一致化）--- */
.repertoire {
  background: var(--bg-soft);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.concert-list {
  display: grid;
  gap: 2.5rem;
}

/* --- 曲目與演出輪播 --- */
/* 以瀏覽器原生水平捲動 + scroll-snap 實作，觸控滑動由系統處理（iOS/iPadOS 最穩） */
.concert-carousel {
  width: 100%;
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;        /* Firefox：隱藏捲軸 */
  cursor: grab;
}

.concert-carousel::-webkit-scrollbar {
  display: none;                /* Chrome / Safari：隱藏捲軸 */
}

.concert-carousel.is-grabbing {
  cursor: grabbing;
}

/* 箭頭與圓點同列置中於輪播下方 */
.concert-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 2rem;
}

.concert-arrow {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.02);
  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}

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

.concert-list.is-carousel {
  display: flex;
  flex-wrap: nowrap;
  gap: 0;
}

.concert-list.is-carousel .concert-card {
  flex: 0 0 100%;
  width: 100%;
  min-width: 100%;
  scroll-snap-align: start;
}

.concert-list.is-carousel img {
  -webkit-user-drag: none;    /* 避免桌機滑鼠拖曳時產生圖片鬼影 */
  user-select: none;
}

.concert-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.65rem;
}

.concert-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--accent-dim);
  cursor: pointer;
  transition: background 0.3s ease, transform 0.3s ease;
}

.concert-dot:hover {
  background: var(--accent);
}

.concert-dot.active {
  background: var(--accent);
  transform: scale(1.35);
}

.concert-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.02);
  box-sizing: border-box;
}

.concert-card-inner {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.concert-card-body {
  flex: 1;
  min-width: 0;
}

.concert-poster {
  flex-shrink: 0;
  width: 312px;
  border-radius: 2px;
  overflow: hidden;
}

.concert-poster img {
  width: 100%;
  height: auto;
  max-height: 432px;
  object-fit: contain;
  display: block;
}

.concert-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 0.35rem;
  padding: 0;
  color: var(--accent);
  line-height: 1.3;
  font-weight: 600;
}

.concert-title-en {
  display: block;
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.concert-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
  padding: 0;
  line-height: 1.5;
}

.concert-program {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  border: 0;
}

.concert-program li {
  display: block;
  margin: 0;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
  box-sizing: border-box;
}

.concert-program li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.concert-program li span {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  padding-left: 0;
  line-height: 1.45;
}

.concert-program li em {
  font-style: normal;
  color: var(--accent);
  font-size: 0.85rem;
}

.concert-org {
  margin: 0;
  padding: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Media --- */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.media-card {
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.media-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.media-thumb {
  aspect-ratio: 16/9;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--accent-dim);
}

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

.media-card h3 {
  font-size: 1.1rem;
  margin: 1rem 1.25rem 0.25rem;
  color: var(--text);
}

.media-card p {
  margin: 0 1.25rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --- Contact --- */
.contact {
  background: var(--bg-soft);
}

.contact-content {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

.contact-content p {
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.contact-email {
  display: inline-block;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.contact-social {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.contact-social a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-social a:hover {
  color: var(--accent);
}

.contact-social-no-link {
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: default;
  text-decoration: none;
}

/* --- Footer --- */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer .container {
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 1rem 1.5rem;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
  }

  .nav.open .nav-links li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav.open .nav-links li:last-child {
    border-bottom: none;
  }

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

  .about-image-placeholder {
    max-width: 320px;
    margin: 0 auto;
  }

  .concert-card-inner {
    flex-direction: column;
  }

  .concert-poster {
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 3.5rem 0;
  }

  .concert-card {
    padding: 1.5rem;
  }
}