.gradient-page {
  min-height: 100vh;
}

.gradient-section {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: clamp(34px, 5vw, 64px) clamp(16px, 2.4vw, 36px) clamp(72px, 9vw, 120px);
}

.gradient-section .section-heading {
  max-width: 760px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.gradient-toolbar {
  display: grid;
  grid-template-columns: minmax(190px, 0.52fr) minmax(420px, 1fr) minmax(156px, auto) auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}

.gradient-filter.gradient-filter--hidden {
  display: none;
}

.gradient-huebar {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 1px;
  min-height: 46px;
  background: var(--line);
  border: 1px solid var(--line);
}

.gradient-huebar button {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
  min-width: 0;
  color: var(--ink);
  background: var(--panel);
  border: 0;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
}

.gradient-huebar button::before {
  display: block;
  width: 12px;
  aspect-ratio: 1;
  background: var(--hue-color);
  content: "";
}

.gradient-huebar button[aria-pressed="true"] {
  color: var(--hover-text);
  background: var(--hover-bg);
}

.gradient-huebar button:hover,
.gradient-huebar button:focus-visible {
  color: var(--hover-text);
  background: var(--hover-bg);
  outline: none;
}

.gradient-search,
.gradient-filter {
  display: flex;
  align-items: center;
  min-width: 0;
  min-height: 46px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
}

.gradient-search {
  gap: 10px;
  padding: 0 12px;
}

.gradient-search:focus-within,
.gradient-filter:focus-within {
  color: var(--ink);
  border-color: var(--line-strong);
}

.gradient-search iconify-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.gradient-search input,
.gradient-filter select {
  width: 100%;
  min-width: 0;
  height: 44px;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: none;
}

.gradient-filter {
  position: relative;
}

.gradient-filter select {
  min-width: 148px;
  padding: 0 38px 0 14px;
  cursor: pointer;
  appearance: none;
}

.gradient-filter::after {
  position: absolute;
  top: 50%;
  right: 14px;
  width: 8px;
  height: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  content: "";
  pointer-events: none;
  transform: translateY(-65%) rotate(45deg);
}

.gradient-action,
.gradient-load {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 14px;
  color: var(--hover-text);
  background: var(--hover-bg);
  border: 1px solid var(--hover-bg);
  cursor: pointer;
  font-weight: 800;
  transition: transform 180ms var(--ease-out-quart), background 180ms ease, color 180ms ease;
}

.gradient-action:hover,
.gradient-action:focus-visible,
.gradient-load:hover,
.gradient-load:focus-visible {
  color: var(--ink);
  background: var(--panel);
  outline: none;
  transform: translateY(-1px);
}

.gradient-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
  margin-bottom: 18px;
  color: var(--muted);
  font-family: var(--font-rounded);
  font-size: 0.88rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.gradient-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 350px), 1fr));
  gap: 16px;
}

.gradient-card {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto;
  gap: 12px;
  aspect-ratio: 3 / 4;
  min-width: 0;
  padding: clamp(16px, 1.5vw, 22px);
  overflow: hidden;
  color: var(--ink);
  background:
    repeating-linear-gradient(0deg, color-mix(in srgb, var(--ink) 3%, transparent) 0 1px, transparent 1px 8px),
    linear-gradient(180deg, color-mix(in srgb, var(--card-light) 10%, var(--panel)) 0%, var(--panel) 72%);
  border: 1px solid color-mix(in srgb, var(--card-anchor) 22%, var(--line));
  box-shadow: 0 14px 34px color-mix(in srgb, var(--card-deep) 14%, transparent);
  cursor: pointer;
  outline: none;
  transition: transform 220ms var(--ease-out-quint), border-color 180ms ease, box-shadow 220ms ease, background 220ms ease;
  isolation: isolate;
}

.gradient-card::before,
.gradient-card::after {
  position: absolute;
  pointer-events: none;
  content: "";
}

.gradient-card::before {
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(80% 52% at 50% 28%, color-mix(in srgb, var(--card-anchor) 28%, transparent), transparent 62%),
    linear-gradient(135deg, color-mix(in srgb, var(--card-light) 20%, transparent), color-mix(in srgb, var(--card-deep) 16%, transparent));
  opacity: 0;
  transition: opacity 220ms ease;
}

.gradient-card::after {
  inset: 8px;
  z-index: 2;
  border: 2px solid color-mix(in srgb, var(--card-anchor) 72%, var(--line-strong));
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--panel) 62%, transparent),
    0 0 0 1px color-mix(in srgb, var(--card-deep) 18%, transparent);
  opacity: 0;
  transform: scale(0.985);
  transition: opacity 180ms ease, transform 220ms var(--ease-out-quint);
}

.gradient-card > * {
  position: relative;
  z-index: 1;
}

:root[data-theme="dark"] .gradient-card {
  background:
    repeating-linear-gradient(0deg, color-mix(in srgb, var(--ink) 4%, transparent) 0 1px, transparent 1px 8px),
    linear-gradient(180deg, color-mix(in srgb, var(--card-deep) 16%, var(--panel)) 0%, var(--panel) 76%);
}

.gradient-card:hover,
.gradient-card:focus-visible {
  border-color: color-mix(in srgb, var(--card-anchor) 72%, var(--line-strong));
  box-shadow:
    0 22px 58px color-mix(in srgb, var(--card-deep) 28%, transparent),
    0 0 0 4px color-mix(in srgb, var(--card-anchor) 12%, transparent);
  transform: translateY(-5px);
}

.gradient-card:hover::before,
.gradient-card:focus-visible::before {
  opacity: 1;
}

.gradient-card:hover::after,
.gradient-card:focus-visible::after {
  opacity: 1;
  transform: scale(1);
}

.gradient-card-head {
  display: grid;
  justify-items: center;
  gap: 5px;
  text-align: center;
}

.gradient-card-head span {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-rounded);
  font-size: 0.92rem;
  font-style: italic;
  font-weight: 500;
  transition: color 180ms ease, background 180ms ease, padding 180ms var(--ease-out-quart);
}

.gradient-card:hover .gradient-card-head span,
.gradient-card:focus-visible .gradient-card-head span {
  padding: 2px 8px;
  color: var(--card-ink);
  background: var(--card-anchor);
  font-style: normal;
}

.gradient-card-head h3 {
  max-width: 100%;
  margin: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-title);
  font-size: clamp(1.18rem, 1.35vw, 1.38rem);
  font-weight: 700;
  line-height: 1.35;
}

.gradient-card-head h3 a {
  color: inherit;
  text-decoration: none;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 180ms ease;
}

.gradient-card:hover .gradient-card-head h3 a,
.gradient-card:focus-visible .gradient-card-head h3 a {
  color: color-mix(in srgb, var(--card-anchor) 82%, var(--ink));
}

.gradient-card-head h3 a:hover,
.gradient-card-head h3 a:focus-visible {
  color: color-mix(in srgb, var(--card-anchor) 72%, var(--ink));
  outline: none;
  text-decoration: underline;
}

.gradient-card-head small {
  max-width: 100%;
  overflow: hidden;
  color: var(--muted);
  font-family: var(--font-rounded);
  font-size: 0.72rem;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 180ms ease;
}

.gradient-card:hover .gradient-card-head small,
.gradient-card:focus-visible .gradient-card-head small {
  color: color-mix(in srgb, var(--ink) 80%, var(--card-anchor));
}

.gradient-card-logic {
  max-width: 32ch;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.55;
  text-align: center;
}

.gradient-tone-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 18px);
  align-content: center;
  justify-items: center;
}

.gradient-multi-track {
  display: flex;
  min-height: 84px;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px;
  padding: 10px;
  overflow: hidden;
  background: var(--gradient-css);
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
}

.gradient-multi-track-compact {
  min-height: 58px;
  padding: 0;
}

.gradient-multi-track small {
  max-width: 72px;
  padding: 3px 7px;
  overflow: hidden;
  color: var(--ink);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  border-radius: 999px;
  font-family: var(--font-rounded);
  font-size: 0.62rem;
  font-weight: 750;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gradient-tone {
  display: grid;
  width: min(100%, 88px);
  min-width: 0;
  gap: 7px;
  align-items: center;
  justify-items: center;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: copy;
  text-align: center;
  transition: background 160ms linear, border-color 160ms linear, transform 160ms linear;
}

.gradient-tone:hover,
.gradient-tone:focus-visible {
  outline: none;
  transform: translateY(-1px);
}

.gradient-tone:hover .gradient-tone-swatch,
.gradient-tone:focus-visible .gradient-tone-swatch {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--tone) 30%, transparent);
}

.gradient-tone-swatch {
  display: grid;
  width: min(100%, 70px);
  aspect-ratio: 1;
  place-items: center;
  background: var(--tone);
  border: 1px solid color-mix(in srgb, var(--ink) 16%, transparent);
  border-radius: 50%;
  box-shadow: none;
  transition: transform 220ms var(--ease-out-quint), box-shadow 180ms ease, border-radius 220ms var(--ease-out-quart), border-color 180ms ease;
}

.gradient-card:hover .gradient-tone-swatch,
.gradient-card:focus-visible .gradient-tone-swatch {
  border-color: color-mix(in srgb, var(--tone) 62%, var(--ink));
  border-radius: 28%;
  box-shadow:
    0 8px 20px color-mix(in srgb, var(--tone) 32%, transparent),
    0 0 0 4px color-mix(in srgb, var(--tone) 16%, transparent);
  transform: translateY(-3px) scale(1.08);
}

.gradient-card:hover .gradient-tone:nth-child(2n) .gradient-tone-swatch,
.gradient-card:focus-visible .gradient-tone:nth-child(2n) .gradient-tone-swatch {
  transform: translateY(2px) scale(1.08);
}

.gradient-card:hover .gradient-tone strong,
.gradient-card:focus-visible .gradient-tone strong {
  color: color-mix(in srgb, var(--ink) 82%, var(--card-anchor));
}

.gradient-tone strong,
.gradient-tone small {
  min-width: 0;
  max-width: 100%;
}

.gradient-tone strong {
  color: var(--ink);
  font-family: var(--font-rounded);
  font-size: 0.76rem;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.gradient-tone small {
  display: -webkit-box;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.3;
  overflow-wrap: anywhere;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.gradient-card-rule {
  height: 1px;
  background: color-mix(in srgb, var(--ink) 22%, transparent);
  transition: background 180ms ease, transform 220ms var(--ease-out-quart);
}

.gradient-card:hover .gradient-card-rule,
.gradient-card:focus-visible .gradient-card-rule {
  background: color-mix(in srgb, var(--card-anchor) 58%, var(--ink));
  transform: scaleX(0.86);
}

.gradient-pair-list {
  display: grid;
  gap: 6px;
}

.gradient-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
  align-items: center;
  min-width: 0;
  padding: 0;
  color: var(--ink-soft);
  background: transparent;
  border: 0;
  cursor: copy;
  font-family: var(--font-rounded);
  font-size: 0.68rem;
  font-weight: 750;
  text-align: left;
  transition: color 180ms ease, transform 180ms var(--ease-out-quart);
}

.gradient-path-track {
  display: block;
  width: 100%;
  height: 18px;
  background: linear-gradient(90deg in oklab, var(--pair-from) 0%, var(--pair-to) 100%);  /* OKLab 感知插值：中段不发灰 */
  border: 1px solid color-mix(in srgb, var(--ink) 16%, transparent);
  border-radius: 999px;
  box-shadow: none;
  transform-origin: center;
  transition: transform 220ms var(--ease-out-quint), border-color 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

.gradient-pair:hover,
.gradient-pair:focus-visible {
  color: var(--ink);
  outline: none;
}

.gradient-pair:hover .gradient-path-track,
.gradient-pair:focus-visible .gradient-path-track {
  border-color: color-mix(in srgb, var(--ink) 34%, transparent);
  transform: translateY(-1px);
}

.gradient-card:hover .gradient-pair,
.gradient-card:focus-visible .gradient-pair {
  color: color-mix(in srgb, var(--ink) 82%, var(--card-anchor));
}

.gradient-card:hover .gradient-path-track,
.gradient-card:focus-visible .gradient-path-track {
  border-color: color-mix(in srgb, var(--card-anchor) 42%, var(--ink));
  box-shadow:
    0 6px 14px color-mix(in srgb, var(--card-deep) 20%, transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--panel) 30%, transparent);
  filter: saturate(1.1) contrast(1.04);
  transform: scaleY(1.28);
}

.gradient-card:hover .gradient-pair:hover .gradient-path-track,
.gradient-card:focus-visible .gradient-pair:focus-visible .gradient-path-track {
  transform: translateY(-1px) scaleY(1.42);
}

.gradient-pair small {
  min-width: 0;
  font-size: inherit;
  font-weight: inherit;
}

.gradient-pair span {
  min-width: 0;
}

.gradient-empty {
  grid-column: 1 / -1;
  display: grid;
  min-height: 260px;
  place-content: center;
  gap: 8px;
  padding: 32px;
  color: var(--ink-soft);
  background: var(--panel);
  border: 1px solid var(--line);
  text-align: center;
}

.gradient-empty strong {
  color: var(--ink);
  font-size: 1.2rem;
}

.gradient-detail {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(280px, 1.2fr);
  gap: clamp(18px, 2.6vw, 34px);
  align-items: stretch;
  margin: 0 0 clamp(22px, 3vw, 36px);
  padding: clamp(18px, 2.4vw, 30px);
  color: var(--ink);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--detail-anchor) 12%, transparent), transparent 56%),
    var(--panel);
  border: 1px solid color-mix(in srgb, var(--detail-anchor) 28%, var(--line));
}

.gradient-detail-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}

.gradient-detail-copy h2 {
  margin: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4vw, 3.8rem);
  line-height: 1.05;
}

.gradient-detail-copy p {
  max-width: 58ch;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.8;
}

.gradient-detail-actions,
.gradient-detail-alt {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.gradient-detail-link,
.gradient-detail-alt a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  padding: 0 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  font-family: var(--font-rounded);
  font-size: 0.86rem;
  font-weight: 750;
  text-decoration: none;
}

.gradient-detail-link:hover,
.gradient-detail-link:focus-visible,
.gradient-detail-alt a:hover,
.gradient-detail-alt a:focus-visible {
  color: var(--hover-text);
  background: var(--hover-bg);
  border-color: var(--hover-bg);
  outline: none;
}

.gradient-detail > .gradient-multi-track {
  min-height: 100%;
}

.gradient-detail-stops {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.gradient-detail-stop {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-width: 0;
  padding: 10px;
  color: var(--ink);
  background: color-mix(in srgb, var(--panel) 76%, var(--tone));
  border: 1px solid color-mix(in srgb, var(--tone) 36%, var(--line));
  text-decoration: none;
}

.gradient-detail-stop span {
  grid-row: span 2;
  width: 38px;
  aspect-ratio: 1;
  background: var(--tone);
  border-radius: 50%;
}

.gradient-detail-stop strong,
.gradient-detail-stop small {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gradient-detail-stop strong {
  font-family: var(--font-title);
  font-size: 0.98rem;
}

.gradient-detail-stop small {
  color: var(--muted);
  font-family: var(--font-rounded);
  font-size: 0.72rem;
  font-weight: 700;
}

.gradient-detail-alt {
  grid-column: 1 / -1;
}

.gradient-more {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.gradient-toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  max-width: min(320px, calc(100vw - 32px));
  padding: 12px 14px;
  color: var(--hover-text);
  background: var(--hover-bg);
  border: 1px solid color-mix(in srgb, var(--hover-text) 16%, transparent);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms var(--ease-out-quart);
}

.gradient-toast[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  .gradient-section {
    padding-top: 32px;
  }

  .gradient-toolbar {
    grid-template-columns: 1fr;
  }

  .gradient-huebar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .gradient-filter select,
  .gradient-action {
    width: 100%;
  }

  .gradient-detail {
    grid-template-columns: 1fr;
  }

  .gradient-detail > .gradient-multi-track {
    min-height: 180px;
  }
}

@media (max-width: 480px) {
  .gradient-section {
    padding-right: 16px;
    padding-left: 16px;
  }

  .gradient-grid {
    gap: 14px;
  }

  .gradient-card-head h3 {
    font-size: 1.16rem;
  }

  .gradient-tone-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .gradient-tone-swatch {
    width: 74px;
  }

  .gradient-multi-track {
    min-height: 72px;
  }

  .gradient-multi-track-compact {
    min-height: 50px;
  }

  .gradient-multi-track small {
    max-width: 54px;
    padding: 2px 5px;
    font-size: 0.56rem;
  }

  .gradient-toast {
    right: 16px;
    bottom: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .gradient-card,
  .gradient-card::before,
  .gradient-card::after,
  .gradient-card-head span,
  .gradient-card-head h3 a,
  .gradient-card-head small,
  .gradient-tone,
  .gradient-tone-swatch,
  .gradient-card-rule,
  .gradient-pair,
  .gradient-path-track {
    transition-duration: 0.01ms;
  }

  .gradient-card:hover,
  .gradient-card:focus-visible,
  .gradient-card:hover .gradient-tone-swatch,
  .gradient-card:focus-visible .gradient-tone-swatch,
  .gradient-card:hover .gradient-tone:nth-child(2n) .gradient-tone-swatch,
  .gradient-card:focus-visible .gradient-tone:nth-child(2n) .gradient-tone-swatch,
  .gradient-card:hover .gradient-card-rule,
  .gradient-card:focus-visible .gradient-card-rule,
  .gradient-card:hover .gradient-path-track,
  .gradient-card:focus-visible .gradient-path-track,
  .gradient-card:hover .gradient-pair:hover .gradient-path-track,
  .gradient-card:focus-visible .gradient-pair:focus-visible .gradient-path-track {
    transform: none;
  }
}