:root {
  --library-bg: #020202;
  --library-bg-soft: #080808;
  --library-panel: rgba(15, 15, 15, 0.9);
  --library-panel-soft: rgba(255, 255, 255, 0.03);
  --library-card: rgba(255, 255, 255, 0.028);
  --library-card-strong: rgba(255, 255, 255, 0.045);
  --library-line: rgba(255, 255, 255, 0.08);
  --library-line-strong: rgba(255, 255, 255, 0.14);
  --library-text: #f5f5f5;
  --library-text-dim: rgba(245, 245, 245, 0.72);
  --library-text-faint: rgba(245, 245, 245, 0.42);
  --library-accent: #c0a080;
  --library-accent-soft: rgba(192, 160, 128, 0.16);
  --library-shadow-soft: 0 24px 64px rgba(0, 0, 0, 0.44);
  --library-shadow-card: 0 18px 38px rgba(0, 0, 0, 0.3);
  --library-radius-xl: 34px;
  --library-radius-lg: 24px;
  --library-radius-md: 18px;
  --library-radius-sm: 14px;
  --library-nav-height: 80px;
  --library-nav-frame-padding: clamp(20px, 3vw, 40px);
  --library-nav-frame-width: min(1520px, calc(100vw - 2 * var(--library-nav-frame-padding)));
  --library-page-padding: clamp(22px, 3vw, 40px);
  --library-content-width: min(1560px, calc(100vw - 2 * var(--library-page-padding)));
  --library-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 78% 10%, rgba(192, 160, 128, 0.1), transparent 22%),
    radial-gradient(circle at 18% 0%, rgba(245, 245, 245, 0.04), transparent 18%),
    linear-gradient(180deg, #040404 0%, #010101 40%, #050505 100%);
  color: var(--library-text);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 300;
  line-height: 1.5;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.014) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.014) 1px, transparent 1px);
  background-size: 160px 160px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.42), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

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

button,
input {
  font: inherit;
}

button {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
}

.materials-library-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  padding: 0 var(--library-nav-frame-padding);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0.5));
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.materials-library-header__nav {
  width: var(--library-nav-frame-width);
  min-height: var(--library-nav-height);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 24px;
}

.materials-library-header__logo {
  grid-column: 1;
  justify-self: start;
  font-size: 0.82rem;
  font-weight: 300;
  letter-spacing: 0.42em;
  text-transform: uppercase;
}

.materials-library-header__links {
  grid-column: 2;
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.materials-library-header__link,
.materials-library-header__cta,
.materials-clear-button,
.materials-active-chip,
.materials-filter-option {
  transition:
    transform 0.8s var(--library-ease),
    border-color 0.8s var(--library-ease),
    color 0.8s var(--library-ease),
    background 0.8s var(--library-ease),
    box-shadow 0.8s var(--library-ease);
}

.materials-library-header__link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(192, 160, 128, 0.12);
  color: rgba(245, 245, 245, 0.72);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
}

.materials-library-header__link:hover,
.materials-library-header__link:focus-visible,
.materials-library-header__link.is-active {
  color: var(--library-text);
  border-color: rgba(192, 160, 128, 0.28);
  background: rgba(192, 160, 128, 0.08);
  outline: none;
}

.materials-library-header__cta,
.materials-clear-button {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(192, 160, 128, 0.2);
  background: rgba(192, 160, 128, 0.04);
  color: var(--library-text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
}

.materials-library-header__cta {
  grid-column: 3;
  justify-self: end;
}

.materials-library-header__cta:hover,
.materials-library-header__cta:focus-visible,
.materials-clear-button:hover,
.materials-clear-button:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(192, 160, 128, 0.36);
  background: rgba(192, 160, 128, 0.08);
  color: var(--library-text);
  outline: none;
}

.materials-library-page {
  width: var(--library-content-width);
  margin: 0 auto;
  padding: calc(var(--library-nav-height) + clamp(30px, 4vw, 52px)) 0 clamp(80px, 7vw, 112px);
}

.materials-hero {
  margin-bottom: 18px;
}

.materials-sidebar__panel,
.materials-toolbar,
.materials-empty,
.material-card {
  border: 1px solid var(--library-line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
    var(--library-panel);
  border-radius: var(--library-radius-xl);
  box-shadow: var(--library-shadow-soft);
}

.materials-hero__copy {
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 640px;
}

.materials-hero__eyebrow,
.materials-empty__eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(192, 160, 128, 0.92);
}

.materials-hero__title,
.materials-empty__title {
  margin: 0;
  font-family: "Cormorant Garamond", "Source Han Serif SC", serif;
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.materials-hero__title {
  font-size: clamp(3rem, 6vw, 6rem);
  line-height: 0.88;
}

.materials-empty__title {
  font-size: clamp(2rem, 4vw, 3.6rem);
}

.materials-empty__body {
  margin: 0;
  color: var(--library-text-dim);
  font-size: 0.95rem;
  line-height: 1.8;
}

.material-card__title {
  margin: 0;
  font-family: "Cormorant Garamond", "Source Han Serif SC", serif;
  font-weight: 500;
}

.materials-browser {
  display: grid;
  grid-template-columns: 286px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.materials-sidebar {
  position: sticky;
  top: calc(var(--library-nav-height) + 24px);
}

.materials-sidebar__panel {
  padding: 24px 22px 22px;
  max-height: calc(100vh - var(--library-nav-height) - 40px);
  max-height: calc(100dvh - var(--library-nav-height) - 40px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-gutter: stable;
}

.materials-sidebar__panel::-webkit-scrollbar {
  width: 10px;
}

.materials-sidebar__panel::-webkit-scrollbar-track {
  background: transparent;
}

.materials-sidebar__panel::-webkit-scrollbar-thumb {
  border-radius: 999px;
  border: 2px solid transparent;
  background: rgba(192, 160, 128, 0.2);
  background-clip: padding-box;
}

.materials-sidebar__panel::-webkit-scrollbar-thumb:hover {
  background: rgba(192, 160, 128, 0.3);
  background-clip: padding-box;
}

.materials-filter-panel {
  display: grid;
  gap: 20px;
}

.materials-filter-group {
  display: grid;
  gap: 10px;
}

.materials-filter-group__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.materials-filter-group__title {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: rgba(245, 245, 245, 0.56);
}

.materials-filter-group__hint {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: rgba(192, 160, 128, 0.78);
}

.materials-filter-group__options {
  display: grid;
  gap: 8px;
}

.materials-filter-option {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0 14px;
  border-radius: 16px;
  border: 1px solid var(--library-line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--library-text-dim);
  text-align: left;
}

.materials-filter-option:hover,
.materials-filter-option:focus-visible,
.materials-filter-option.is-active {
  transform: translateY(-1px);
  border-color: rgba(192, 160, 128, 0.28);
  background: rgba(192, 160, 128, 0.08);
  color: var(--library-text);
  outline: none;
}

.materials-filter-option__count {
  color: var(--library-text-faint);
  font-size: 0.76rem;
}

.materials-content {
  min-width: 0;
}

.materials-toolbar {
  padding: clamp(22px, 3vw, 30px);
  display: flex;
  align-items: end;
  gap: 20px 24px;
  margin-bottom: 16px;
}

.materials-toolbar__search {
  display: grid;
  gap: 10px;
  width: 100%;
  max-width: 720px;
  align-self: center;
}

.materials-toolbar__search-label {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: rgba(245, 245, 245, 0.52);
}

.materials-toolbar__search-input {
  width: 100%;
  min-height: 52px;
  padding: 0 18px;
  border-radius: 18px;
  border: 1px solid rgba(192, 160, 128, 0.18);
  background: rgba(255, 255, 255, 0.026);
  color: var(--library-text);
  outline: none;
  transition:
    border-color 0.8s var(--library-ease),
    background 0.8s var(--library-ease),
    box-shadow 0.8s var(--library-ease);
}

.materials-toolbar__search-input::placeholder {
  color: rgba(245, 245, 245, 0.34);
}

.materials-toolbar__search-input:focus {
  border-color: rgba(192, 160, 128, 0.34);
  background: rgba(255, 255, 255, 0.038);
  box-shadow: 0 0 0 3px rgba(192, 160, 128, 0.08);
}

.materials-toolbar__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.materials-toolbar__count {
  margin: 0;
  color: var(--library-text-dim);
}

.materials-active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.materials-active-chip {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(192, 160, 128, 0.22);
  background: rgba(192, 160, 128, 0.05);
  color: var(--library-accent);
}

.materials-active-chip:hover,
.materials-active-chip:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(192, 160, 128, 0.38);
  background: rgba(192, 160, 128, 0.09);
  outline: none;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(264px, 1fr));
  gap: 22px;
}

.material-card {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
}

.material-card:hover,
.material-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(192, 160, 128, 0.2);
}

.material-card__visual {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 22%, rgba(255, 255, 255, 0.08), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.18));
}

.material-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--library-ease);
}

.material-card__image[data-media-mode="contain"],
.material-card__image[data-media-mode="letterbox"] {
  object-fit: contain;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.05));
  padding: 8px;
}

.material-card:hover .material-card__image,
.material-card:focus-visible .material-card__image {
  transform: scale(1.03);
}

.material-card__placeholder {
  position: absolute;
  inset: 0;
  padding: 20px;
  display: grid;
  align-content: end;
  gap: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 46%),
    linear-gradient(180deg, #121212 0%, #090909 100%);
}

.material-card__placeholder-kicker {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: rgba(192, 160, 128, 0.86);
}

.material-card__placeholder-title {
  margin: 0;
  font-family: "Cormorant Garamond", "Source Han Serif SC", serif;
  font-size: 1.6rem;
}

.material-card__body {
  padding: 14px 16px 18px;
  display: grid;
  gap: 10px;
}

.material-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.material-card__rank {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(192, 160, 128, 0.82);
}

.material-card__date {
  margin: 0;
  font-family: "Cormorant Garamond", "Source Han Serif SC", serif;
  font-size: 0.96rem;
  font-style: italic;
  color: rgba(245, 245, 245, 0.68);
}

.material-card__title {
  margin: 0;
  font-family: "Cormorant Garamond", "Source Han Serif SC", serif;
  font-size: clamp(1.18rem, 1.6vw, 1.38rem);
  font-weight: 500;
  line-height: 1.05;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.material-card__footer {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.76rem;
  color: var(--library-text-dim);
}

.material-card__people {
  margin-left: auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: rgba(192, 160, 128, 0.96);
  letter-spacing: 0.08em;
  text-align: right;
}

.material-card__people:empty {
  display: none;
}

.material-card__platform {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: rgba(245, 245, 245, 0.62);
}

.materials-empty {
  padding: clamp(30px, 5vw, 56px);
  margin-top: 10px;
  display: grid;
  gap: 12px;
}

.materials-loadmore {
  margin: 18px 0 6px;
  color: var(--library-text-dim);
  text-align: center;
  letter-spacing: 0.08em;
}

.materials-sentinel {
  height: 1px;
}

@media (max-width: 1280px) {
  .materials-toolbar {
    flex-wrap: wrap;
  }
}

@media (max-width: 1100px) {
  .materials-browser {
    grid-template-columns: 1fr;
  }

  .materials-sidebar {
    position: static;
  }

  .materials-sidebar__panel {
    max-height: none;
    overflow: visible;
  }

  .materials-filter-group__options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .materials-library-header__nav {
    padding: 14px 0;
    row-gap: 12px;
  }

  .materials-library-header__cta {
    grid-column: 1 / -1;
    justify-self: end;
  }

  .materials-toolbar {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }

  .materials-toolbar__search {
    max-width: none;
  }

  .materials-toolbar__meta {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 720px) {
  .materials-library-page {
    padding-top: calc(var(--library-nav-height) + 24px);
  }

  .materials-sidebar__panel,
  .materials-toolbar,
  .materials-empty,
  .material-card {
    border-radius: 24px;
  }

  .materials-toolbar__meta {
    align-items: flex-start;
    flex-direction: column;
    justify-content: flex-start;
  }

  .materials-filter-group__options {
    grid-template-columns: 1fr;
  }

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

  .material-card__title {
    font-size: 1.4rem;
  }
}