:root {
  color-scheme: dark;
  --bg: #080b0e;
  --panel: rgba(18, 24, 29, 0.92);
  --panel-strong: #12171c;
  --text: #edf4f6;
  --muted: #8f9da7;
  --line: rgba(225, 234, 239, 0.13);
  --teal: #43d9bd;
  --coral: #ff725e;
  --gold: #efba58;
  --radius-lg: 24px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  display: flow-root;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  background:
    radial-gradient(
      circle at 14% -12%,
      rgba(67, 217, 189, 0.1),
      transparent 32%
    ),
    radial-gradient(
      circle at 88% 2%,
      rgba(255, 114, 94, 0.06),
      transparent 27%
    ),
    linear-gradient(145deg, #0d1216 0%, #10161b 48%, #0c1115 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-shell {
  display: flex;
  width: min(calc(100% - 48px), 1280px);
  min-height: calc(100vh - 48px);
  min-height: calc(100dvh - 48px);
  margin: 24px auto;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(
      circle at 8% 0%,
      rgba(67, 217, 189, 0.055),
      transparent 25%
    ),
    linear-gradient(
      180deg,
      rgba(18, 24, 29, 0.97),
      rgba(11, 15, 18, 0.98)
    );
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.28);
}

.hero {
  padding: clamp(42px, 7vw, 84px) clamp(24px, 5vw, 64px)
    clamp(30px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 780;
  letter-spacing: 0.2em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 5.2rem);
  font-weight: 760;
  line-height: 1.05;
  letter-spacing: -0.055em;
}

.hero-copy {
  max-width: 560px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
}

.instrument-grid {
  display: grid;
  padding: clamp(18px, 3vw, 36px);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 22px);
}

.instrument-card {
  --accent: var(--teal);
  --accent-rgb: 67, 217, 189;
  position: relative;
  display: flex;
  min-height: 430px;
  overflow: hidden;
  padding: 22px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    radial-gradient(
      circle at 50% 28%,
      rgba(var(--accent-rgb), 0.11),
      transparent 35%
    ),
    linear-gradient(160deg, rgba(20, 26, 31, 0.96), rgba(10, 14, 17, 0.98));
  text-decoration: none;
  isolation: isolate;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.instrument-card::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(
    145deg,
    rgba(var(--accent-rgb), 0.08),
    transparent 45%
  );
  content: "";
  opacity: 0;
  transition: opacity 180ms ease;
}

.instrument-card-guitar {
  --accent: var(--coral);
  --accent-rgb: 255, 114, 94;
}

.instrument-card-harmonica {
  --accent: var(--teal);
  --accent-rgb: 67, 217, 189;
}

.instrument-card-keyboard {
  --accent: var(--gold);
  --accent-rgb: 239, 186, 88;
}

.instrument-card:hover {
  border-color: rgba(var(--accent-rgb), 0.52);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.24);
  transform: translateY(-4px);
}

.instrument-card:hover::before {
  opacity: 1;
}

.instrument-card:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 4px;
}

.card-number {
  align-self: flex-end;
  color: rgba(237, 244, 246, 0.38);
  font-size: 0.7rem;
  font-weight: 760;
  letter-spacing: 0.14em;
}

.instrument-image {
  display: grid;
  min-height: 190px;
  margin: 4px 0 8px;
  place-items: center;
}

.instrument-image img {
  display: block;
  width: min(80%, 220px);
  height: auto;
  filter: drop-shadow(0 18px 18px rgba(0, 0, 0, 0.24));
  transition: transform 220ms ease;
}

.instrument-card:hover .instrument-image img {
  transform: scale(1.035);
}

.card-content {
  display: grid;
  gap: 6px;
}

.card-kicker {
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 780;
  letter-spacing: 0.16em;
}

.card-content strong {
  color: var(--text);
  font-size: clamp(1.2rem, 2vw, 1.48rem);
  letter-spacing: -0.025em;
}

.card-description {
  color: var(--muted);
  font-size: 0.88rem;
}

.card-action {
  display: flex;
  margin-top: auto;
  padding-top: 24px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid transparent;
  color: rgba(237, 244, 246, 0.76);
  font-size: 0.82rem;
  font-weight: 650;
  transition: color 180ms ease;
}

.card-action > span {
  color: var(--accent);
  font-size: 1.1rem;
  transition: transform 180ms ease;
}

.instrument-card:hover .card-action,
.instrument-card:focus-visible .card-action {
  color: var(--text);
}

.instrument-card:hover .card-action > span,
.instrument-card:focus-visible .card-action > span {
  transform: translate(2px, -2px);
}

.site-footer {
  margin-top: auto;
  padding: 20px clamp(24px, 5vw, 64px);
  border-top: 1px solid var(--line);
  color: rgba(143, 157, 167, 0.72);
}

.site-footer small {
  font-size: 0.72rem;
}

@media (max-width: 900px) {
  .instrument-grid {
    grid-template-columns: 1fr;
  }

  .instrument-card {
    display: grid;
    min-height: 220px;
    padding: 20px;
    grid-template-columns: minmax(150px, 34%) 1fr;
    grid-template-rows: auto 1fr auto;
    column-gap: 24px;
  }

  .card-number {
    grid-column: 2;
  }

  .instrument-image {
    min-height: 180px;
    margin: 0;
    grid-row: 1 / 4;
  }

  .instrument-image img {
    width: min(100%, 190px);
  }

  .card-content {
    align-self: center;
  }

  .card-action {
    padding-top: 16px;
  }
}

@media (max-width: 600px) {
  .site-shell {
    width: min(calc(100% - 24px), 1280px);
    min-height: calc(100vh - 24px);
    min-height: calc(100dvh - 24px);
    margin: 12px auto;
    border-radius: 18px;
  }

  .hero {
    padding: 36px 22px 28px;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 14vw, 3.25rem);
  }

  .instrument-grid {
    padding: 14px;
  }

  .instrument-card {
    display: flex;
    min-height: 390px;
    padding: 18px;
  }

  .instrument-image {
    min-height: 180px;
  }

  .card-number {
    grid-column: auto;
  }

  .site-footer {
    padding: 18px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .instrument-card,
  .instrument-card::before,
  .instrument-image img,
  .card-action,
  .card-action > span {
    transition: none;
  }
}