:root {
  --worksheet-bg: #ffffff;
  --worksheet-surface: #ffffff;
  --worksheet-surface-soft: #f1f8fa;
  --worksheet-surface-warm: #fff2ee;
  --worksheet-text: #254e70;
  --worksheet-muted: #496270;
  --worksheet-border: #dce7eb;
  --worksheet-primary: #254e70;
  --worksheet-primary-strong: #173e5c;
  --worksheet-accent: #e56f65;
  --worksheet-accent-strong: #c7524b;
  --worksheet-yellow: #f6c753;
  --worksheet-mint: #e9f6f3;
  --worksheet-focus: #254e70;
  --worksheet-shadow: 0 12px 28px rgba(37, 78, 112, 0.09);
}

* {
  box-sizing: border-box;
}

body.worksheet-hub {
  margin: 0;
  background: var(--worksheet-bg);
  color: var(--worksheet-text);
  font-family: "DM Sans", Arial, sans-serif;
  line-height: 1.6;
}

body.worksheet-hub::before {
  content: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: none;
}

.worksheet-skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-150%);
  border-radius: 999px;
  background: var(--worksheet-primary);
  color: #fff;
  padding: 0.75rem 1rem;
  font-weight: 800;
  text-decoration: none;
}

.worksheet-skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--worksheet-focus);
  outline-offset: 3px;
}

.worksheet-header {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--worksheet-border);
  background: #ffffff;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(37, 78, 112, 0.08);
}

.worksheet-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0;
}

.worksheet-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--worksheet-text);
  font-weight: 900;
  text-decoration: none;
}

.worksheet-brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.worksheet-nav__links {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.worksheet-nav__links a {
  border: 1px solid var(--worksheet-border);
  border-radius: 999px;
  background: #fff;
  color: var(--worksheet-primary);
  padding: 0.62rem 0.9rem;
  font-weight: 800;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.worksheet-nav__links a:hover {
  border-color: #f0b2a4;
  background: var(--worksheet-surface-warm);
  transform: translateY(-1px);
}

.worksheet-language {
  position: relative;
}

.worksheet-language summary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 3.1rem;
  border: 1px solid var(--worksheet-border);
  border-radius: 0.8rem;
  background: #ffffff;
  color: var(--worksheet-primary-strong);
  cursor: pointer;
  list-style: none;
  padding: 0.72rem 1rem;
  font-weight: 900;
  box-shadow: 0 14px 32px rgba(37, 78, 112, 0.1);
}

.worksheet-language summary::-webkit-details-marker {
  display: none;
}

.worksheet-language__icon {
  color: var(--worksheet-primary);
  font-size: 1rem;
}

.worksheet-language__plus {
  color: var(--worksheet-muted);
  font-size: 1.1rem;
  line-height: 1;
}

.worksheet-language[open] .worksheet-language__plus {
  transform: rotate(45deg);
}

.worksheet-language__panel {
  position: absolute;
  top: calc(100% + 0.55rem);
  right: 0;
  display: grid;
  grid-template-columns: repeat(5, max-content);
  gap: 0.55rem;
  min-width: max-content;
  border: 1px solid var(--worksheet-border);
  border-radius: 1rem;
  background: #ffffff;
  box-shadow: var(--worksheet-shadow);
  padding: 0.65rem;
}

.worksheet-language__panel a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.45rem;
  height: 2.45rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.worksheet-language__panel a:hover,
.worksheet-language__panel a:focus-visible,
.worksheet-language__panel a[aria-current="page"] {
  border-color: #f0b2a4;
  background: var(--worksheet-surface-soft);
  transform: translateY(-1px);
}

.worksheet-language img {
  display: block;
  width: 24px;
  height: 24px;
  border-radius: 999px;
}

.worksheet-main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4.5rem) 0;
}

.worksheet-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(17rem, 0.8fr);
  gap: clamp(1.25rem, 4vw, 3rem);
  align-items: center;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.worksheet-hero > div:first-child {
  border-radius: 2rem;
  padding: clamp(0.25rem, 2vw, 1rem);
}

.worksheet-eyebrow {
  margin: 0 0 0.75rem;
  color: var(--worksheet-accent);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.worksheet-hero h1 {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2.5rem, 8vw, 5.25rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.worksheet-hero p {
  max-width: 58ch;
  color: var(--worksheet-muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.worksheet-hero__card {
  border: 1px solid var(--worksheet-border);
  border-radius: 2rem;
  background: #ffffff;
  box-shadow: var(--worksheet-shadow);
  padding: clamp(1.25rem, 4vw, 2rem);
}

.worksheet-hero__card li + li {
  margin-top: 0.55rem;
}

.worksheet-hero__card h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.worksheet-hero__card ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--worksheet-muted);
}

.worksheet-section {
  margin-block: clamp(2rem, 5vw, 4rem);
}

.worksheet-section__header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-bottom: 1.25rem;
}

.worksheet-section h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.05;
}

.worksheet-section__header p {
  max-width: 62ch;
  margin: 0.75rem 0 0;
  color: var(--worksheet-muted);
}

.worksheet-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.worksheet-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border: 1px solid var(--worksheet-border);
  border-radius: 1.5rem;
  background: var(--worksheet-surface);
  box-shadow: 0 12px 32px rgba(37, 78, 112, 0.08);
  overflow: hidden;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.worksheet-card:hover,
.worksheet-card:focus-within {
  border-color: #f0b2a4;
  box-shadow: 0 18px 42px rgba(37, 78, 112, 0.12);
  transform: translateY(-2px);
}

.worksheet-card__image {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: clamp(12rem, 24vw, 17rem);
  background: #ffffff;
  overflow: hidden;
  padding: 0.85rem;
}

.worksheet-card__image img {
  width: 100%;
  height: 100%;
  max-height: 15.5rem;
  object-fit: contain;
  object-position: center;
  border-radius: 1rem;
  box-shadow: 0 10px 28px rgba(37, 78, 112, 0.1);
}

.worksheet-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
}

.worksheet-tag {
  align-self: flex-start;
  border-radius: 999px;
  background: var(--worksheet-surface-warm);
  color: var(--worksheet-primary-strong);
  padding: 0.35rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.worksheet-card h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.2;
}

.worksheet-card p {
  margin: 0;
  color: var(--worksheet-muted);
}

.worksheet-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: auto;
}

.worksheet-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--worksheet-primary);
  color: #fff;
  padding: 0.75rem 1rem;
  font-weight: 900;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.worksheet-button--secondary {
  background: #e9f7fb;
  color: var(--worksheet-primary-strong);
}

.worksheet-button:hover {
  background: var(--worksheet-primary-strong);
  transform: translateY(-1px);
}

.worksheet-button--secondary:hover {
  background: #d9f0f6;
  color: var(--worksheet-primary-strong);
}

.worksheet-guidance {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.worksheet-guidance article {
  border: 1px solid var(--worksheet-border);
  border-radius: 1.25rem;
  background: #ffffff;
  padding: 1.25rem;
}

.worksheet-guidance article::before {
  content: "";
  display: block;
  width: 2.5rem;
  height: 0.28rem;
  margin-bottom: 0.85rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--worksheet-accent), var(--worksheet-yellow));
}

.worksheet-guidance h3 {
  margin-top: 0;
}

.worksheet-footer {
  border-top: 1px solid var(--worksheet-border);
  padding: 1.5rem 1rem;
  color: var(--worksheet-muted);
  text-align: center;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--worksheet-focus);
  outline-offset: 3px;
}

@media (max-width: 860px) {
  .worksheet-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .worksheet-language {
    align-self: flex-start;
  }

  .worksheet-language__panel {
    left: 0;
    right: auto;
  }

  .worksheet-hero,
  .worksheet-grid,
  .worksheet-guidance {
    grid-template-columns: 1fr;
  }

  .worksheet-hero h1 {
    max-width: 14ch;
  }

  .worksheet-section__header {
    align-items: start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .worksheet-main {
    width: min(100% - 1rem, 1120px);
    padding-top: 1.5rem;
  }

  .worksheet-nav__links a,
  .worksheet-language summary {
    padding: 0.55rem 0.72rem;
  }

  .worksheet-card__body,
  .worksheet-guidance article {
    padding: 1rem;
  }
}


@media (forced-colors: active) {
  .worksheet-header,
  .worksheet-hero__card,
  .worksheet-card,
  .worksheet-guidance article,
  .worksheet-nav__links a,
  .worksheet-language summary,
  .worksheet-language__panel,
  .worksheet-language__panel a {
    border: 1px solid CanvasText;
    box-shadow: none;
  }

  .worksheet-button,
  .worksheet-skip-link {
    border: 1px solid ButtonText;
  }
}

@media print {
  .worksheet-header,
  .worksheet-language,
  .worksheet-skip-link {
    display: none;
  }

  body.worksheet-hub {
    background: #fff;
    color: #000;
  }

  .worksheet-main {
    width: 100%;
    padding: 0;
  }

  .worksheet-card,
  .worksheet-guidance article {
    break-inside: avoid;
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}