:root {
  --um-ma-bg: #f4f7fb;
  --um-ma-panel: #ffffff;
  --um-ma-teal: #0f9b8e;
  --um-ma-teal-dark: #0c6fb7;
  --um-ma-navy: #0f2735;
  --um-ma-muted: #5c6f82;
  --um-ma-border: #e1e7ef;
  --um-ma-shadow: 0 18px 50px rgba(10, 51, 81, 0.12);
  --um-ma-radius: 18px;
  --um-ma-orange: #f99500;
  --um-ma-link: #020482;
}

.um-material-archive {
  background: var(--um-ma-bg);
  color: var(--um-ma-navy);
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(4rem, 8vw, 6rem);
  position: relative;
}

.um-material-archive::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 10%, rgba(15, 155, 142, 0.12), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(12, 111, 183, 0.12), transparent 32%);
  pointer-events: none;
  z-index: 0;
}

.um-material-archive__inner {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.um-material-archive__hero {
  background: linear-gradient(120deg, #4687ff 0%, #a76aed 25%, #f06dc0 50%, #fd6a7a 75%, #f68949 100%);
  color: #fff;
  border-radius: calc(var(--um-ma-radius) * 1.2);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: var(--um-ma-shadow);
  position: relative;
  overflow: hidden;
}

.um-material-archive__hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 60%);
  mask: radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 1), transparent 60%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.65), transparent 55%);
  pointer-events: none;
}

.um-material-archive__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.um-material-archive__title {
  font-size: clamp(2rem, 3vw, 2.8rem);
  line-height: 1.25;
  margin: 0.75rem 0 0.6rem;
}

.um-material-archive__lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.94);
  max-width: 880px;
}

.um-material-archive__lead p {
  margin: 0 0 0.6rem;
}

.um-material-archive__filter-bar {
  margin-top: clamp(1.25rem, 4vw, 2.2rem);
  background: #fff;
  color: var(--um-ma-navy);
  border-radius: calc(var(--um-ma-radius) * 0.85);
  padding: 1rem 1.25rem;
  box-shadow: 0 10px 36px rgba(15, 39, 53, 0.12);
  display: flex;
  align-items: center;
  gap: 0.85rem 1rem;
  flex-wrap: wrap;
}

.um-material-archive__filter-label {
  font-weight: 700;
  color: var(--um-ma-navy);
  padding: 0.4rem 0.75rem;
  background: rgba(12, 111, 183, 0.08);
  border-radius: 999px;
}

.um-material-archive__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.um-material-archive__filters .um-material-archive__filter:first-child {
  background: #4687ff;
  border-color: #4687ff;
  color: #fff;
  box-shadow: 0 12px 26px rgba(70, 135, 255, 0.28);
}

.um-material-archive__filters .um-material-archive__filter:first-child small {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.um-material-archive__filters .um-material-archive__filter:first-child:hover {
  transform: translateY(-2px);
  border-color: #4687ff;
}

.um-material-archive__filters .um-material-archive__filter:first-child.is-active {
  background: #4687ff;
  border-color: #4687ff;
  color: #fff;
  box-shadow: 0 12px 30px rgba(70, 135, 255, 0.35);
}

.um-material-archive__filters .um-material-archive__filter:first-child.is-active small {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.um-material-archive__filter {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--um-ma-border);
  background: #fff;
  color: var(--um-ma-navy);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 6px 18px rgba(15, 39, 53, 0.08);
}

.um-material-archive__filter small {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: rgba(15, 155, 142, 0.09);
  color: var(--um-ma-teal);
  font-weight: 700;
  padding: 0 0.55rem;
}

.um-material-archive__filter:hover {
  transform: translateY(-2px);
  border-color: rgba(12, 111, 183, 0.5);
}

.um-material-archive__filter.is-active {
  background: linear-gradient(135deg, #0b7a85, #0d8fa3);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 12px 28px rgba(12, 111, 183, 0.25);
}

.um-material-archive__filter.is-active small {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

.um-material-archive__grid {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.um-material-archive__grid-inner {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(340px, 520px));
  justify-content: center;
}

.um-material-card {
  background: var(--um-ma-panel);
  border-radius: var(--um-ma-radius);
  box-shadow: var(--um-ma-shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  border: 1px solid rgba(15, 39, 53, 0.04);
}

.um-material-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 60px rgba(10, 51, 81, 0.16);
}

.um-material-card__thumb {
  position: relative;
  background: #eff3f7;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.um-material-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.um-material-card__thumb--placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--um-ma-muted);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.um-material-card__badge {
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  padding: 0.4rem 0.8rem;
  background: rgba(249, 149, 0, 0.9);
  color: #0f2735;
  font-weight: 800;
  letter-spacing: 0.06em;
  border-radius: 0.6rem;
  box-shadow: 0 10px 18px rgba(249, 149, 0, 0.22);
}

.um-material-card__body {
  padding: 1.2rem 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
  text-align: center;
}

.um-material-card__title {
  font-size: 1.1rem;
  line-height: 1.5;
  margin: 0;
}

.um-material-card__title a {
  color: inherit;
  text-decoration: none;
}

.um-material-card__title a:hover {
  color: var(--um-ma-teal-dark);
  text-decoration: underline;
}

.um-material-card__excerpt {
  margin: 0;
  color: var(--um-ma-muted);
  line-height: 1.6;
}

.um-material-card__topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
}

.um-material-card__topic {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  background: rgba(15, 155, 142, 0.08);
  color: var(--um-ma-teal);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}

.um-material-card__actions {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.um-material-card__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.um-material-card__btn--primary {
  background: linear-gradient(120deg, #4687ff 0%, #a76aed 26%, #f06dc0 52%, #fd6a7a 78%, #f68949 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 12px 24px rgba(70, 135, 255, 0.22);
}

.um-material-card__btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(70, 135, 255, 0.28);
}

.um-material-card__btn--ghost {
  background: #fff;
  color: var(--um-ma-link, #020482);
  border-color: currentColor;
}

.um-material-card__btn--ghost:hover {
  border-color: currentColor;
  transform: translateY(-1px);
}

.um-material-archive__empty {
  text-align: center;
  color: var(--um-ma-muted);
  font-weight: 700;
  padding: 2rem 0;
}

.um-material-archive__body {
  margin-top: clamp(2.5rem, 7vw, 4rem);
  background: var(--um-ma-panel);
  border-radius: calc(var(--um-ma-radius) * 1.1);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  box-shadow: var(--um-ma-shadow);
}

.um-material-archive__body :where(h2, h3) {
  color: var(--um-ma-navy);
}

@media (max-width: 980px) {
  .um-material-archive__filter-bar {
    padding: 1rem;
  }

  .um-material-card__body {
    padding: 1rem 1.1rem 1.2rem;
  }
}

@media (max-width: 720px) {
  .um-material-archive {
    padding-top: 2rem;
  }

  .um-material-archive__hero {
    border-radius: calc(var(--um-ma-radius) * 0.9);
  }

  .um-material-archive__filter-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .um-material-card__actions {
    flex-direction: column;
  }

  .um-material-card__btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .um-material-card,
  .um-material-card__btn,
  .um-material-archive__filter {
    transition: none;
  }
}