/* Page-owned styles for niveaux-difficiles */

.nd-page {
  background-color: var(--color-encre-nuit);
}

/* Hero */
.nd-hero {
  padding-block-start: var(--space-64);
  padding-block-end: var(--space-48);
  border-block-end: 1px solid var(--color-ardoise);
}

.nd-hero__inner {
  max-width: 720px;
  margin-inline: auto;
  padding-inline: var(--container-margin-mobile);
  text-align: left;
}

.nd-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-h1-size);
  line-height: var(--text-h1-line-height);
  letter-spacing: var(--text-h1-letter-spacing);
  font-weight: var(--text-h1-weight);
  color: var(--color-ivoire);
  margin-block-end: var(--space-16);
  text-wrap: balance;
  overflow-wrap: break-word;
}

.nd-hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  letter-spacing: var(--text-body-letter-spacing);
  font-weight: var(--text-body-weight);
  color: var(--color-ivoire);
  margin-block-end: var(--space-16);
}

.nd-hero__meta {
  font-family: var(--font-body);
  font-size: var(--text-small-size);
  line-height: var(--text-small-line-height);
  letter-spacing: var(--text-small-letter-spacing);
  color: var(--color-brume);
  margin-block-end: 0;
}

/* Sections */
.nd-section {
  padding-block: var(--section-spacing-mobile);
}

.nd-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-margin-mobile);
}

.nd-editorial {
  width: 100%;
  max-width: 720px;
  margin-inline: auto;
  padding-inline: var(--container-margin-mobile);
  text-align: left;
}

.nd-editorial h2 {
  margin-block-end: var(--space-16);
}

.nd-editorial p {
  margin-block-end: var(--space-16);
}

.nd-editorial p:last-child {
  margin-block-end: 0;
}

.nd-editorial ul,
.nd-editorial ol {
  margin-block-end: var(--space-16);
  padding-inline-start: var(--space-24);
}

.nd-editorial ul:last-child,
.nd-editorial ol:last-child {
  margin-block-end: 0;
}

.nd-editorial li {
  margin-block-end: var(--space-4);
}

.nd-editorial li:last-child {
  margin-block-end: 0;
}

/* Tip box */
.nd-tip-box {
  background-color: var(--tip-box-bg);
  border-inline-start: var(--tip-box-border-left);
  padding: var(--tip-box-padding);
  border-radius: var(--tip-box-radius);
  margin-block-end: var(--space-16);
}

.nd-tip-box:last-child {
  margin-block-end: 0;
}

.nd-tip-box p {
  margin-block-end: 0;
}

/* Strategies grid */
.nd-strategies__grid {
  display: grid;
  gap: var(--space-24);
  margin-block-start: var(--space-24);
}

.nd-strategies__grid > * {
  min-width: 0;
}

/* Cards */
.nd-card {
  background-color: var(--surface-card-bg);
  border: var(--surface-card-border);
  border-radius: var(--surface-card-radius);
  padding: var(--surface-card-padding);
  transition: box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.nd-card:hover {
  box-shadow: var(--surface-card-hover-shadow);
  transform: translateY(var(--surface-card-hover-translate));
}

.nd-card h3 {
  margin-block-end: var(--space-12);
}

.nd-card h4 {
  margin-block-end: var(--space-8);
}

.nd-card p {
  margin-block-end: 0;
}

.nd-card--compact {
  padding: var(--space-16);
}

/* Level example layout */
.nd-level-example__layout {
  display: grid;
  gap: var(--space-24);
  align-items: start;
}

.nd-level-example__layout > * {
  min-width: 0;
}

.nd-level-example__media img,
.nd-level-chains__media img {
  width: 100%;
  height: auto;
  border-radius: var(--image-radius);
  filter: var(--image-filter);
  transition: transform var(--transition-slow);
  display: block;
}

.nd-level-example__media img:hover,
.nd-level-chains__media img:hover {
  transform: scale(1.02);
}

.nd-level-example__content h2,
.nd-level-chains__content h2 {
  margin-block-end: var(--space-16);
}

.nd-level-example__content h3,
.nd-level-chains__content h3 {
  margin-block-end: var(--space-12);
}

.nd-level-example__content p,
.nd-level-chains__content p {
  margin-block-end: var(--space-16);
}

.nd-level-example__content p:last-child,
.nd-level-chains__content p:last-child {
  margin-block-end: 0;
}

.nd-ordered-list {
  margin-block-end: var(--space-16);
  padding-inline-start: var(--space-24);
}

.nd-ordered-list li {
  margin-block-end: var(--space-4);
}

.nd-ordered-list li:last-child {
  margin-block-end: 0;
}

/* Level chains layout */
.nd-level-chains__layout {
  display: grid;
  gap: var(--space-24);
  align-items: start;
}

.nd-level-chains__layout > * {
  min-width: 0;
}

/* Boosters grid */
.nd-boosters__grid {
  display: grid;
  gap: var(--space-16);
  margin-block-start: var(--space-24);
}

.nd-boosters__grid > * {
  min-width: 0;
}

/* Errors surface */
.nd-errors__surface {
  background-color: var(--color-encre-profonde);
  border: 1px solid var(--color-ardoise);
  border-radius: var(--radius-medium);
  padding: var(--space-24);
}

.nd-errors__surface h2 {
  margin-block-end: var(--space-16);
}

.nd-error-list {
  list-style: none;
  padding-inline-start: 0;
  margin-block-end: 0;
}

.nd-error-list li {
  margin-block-end: var(--space-12);
  padding-inline-start: var(--space-24);
  position: relative;
}

.nd-error-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-ambre-atelier);
}

.nd-error-list li:last-child {
  margin-block-end: 0;
}

/* Resources list */
.nd-resource-list {
  list-style: none;
  padding-inline-start: 0;
  margin-block-end: 0;
}

.nd-resource-list li {
  margin-block-end: var(--space-12);
  padding-block-end: var(--space-12);
  border-block-end: 1px solid var(--color-ardoise);
}

.nd-resource-list li:last-child {
  margin-block-end: 0;
  padding-block-end: 0;
  border-block-end: none;
}

.nd-resource-list a {
  color: var(--color-ambre-atelier);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-fast);
}

.nd-resource-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-ambre-atelier);
  transition: width var(--transition-medium);
}

.nd-resource-list a:hover {
  color: var(--color-cuivre);
}

.nd-resource-list a:hover::after {
  width: 100%;
}

/* CTA */
.nd-cta {
  text-align: center;
}

.nd-cta__inner {
  max-width: 720px;
  margin-inline: auto;
  padding-inline: var(--container-margin-mobile);
  text-align: center;
}

.nd-cta__inner h2 {
  margin-block-end: var(--space-16);
}

.nd-cta__inner p {
  margin-block-end: var(--space-24);
}

.nd-cta__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  font-family: var(--font-body);
  font-weight: var(--button-primary-weight);
  font-size: var(--text-body-size);
  line-height: 1.2;
  letter-spacing: var(--text-body-letter-spacing);
  border-radius: var(--button-primary-radius);
  padding: var(--button-primary-padding);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  min-height: 44px;
  min-width: 44px;
  flex-shrink: 0;
  background-color: var(--button-primary-bg);
  color: var(--button-primary-text);
  border: none;
}

.nd-cta__button:hover {
  background-color: var(--button-primary-hover-bg);
  color: var(--button-primary-text);
}

.nd-cta__button:active {
  transform: scale(var(--button-active-scale));
}

.nd-cta__button:focus-visible {
  outline: var(--border-focus);
  outline-offset: var(--border-focus-offset);
}

/* Tablet and desktop */
@media (min-width: 768px) {
  .nd-hero {
    padding-block-start: var(--space-96);
    padding-block-end: var(--space-64);
  }

  .nd-hero__inner {
    padding-inline: var(--container-margin-desktop);
  }

  .nd-section {
    padding-block: var(--section-spacing-desktop);
  }

  .nd-container {
    padding-inline: var(--container-margin-desktop);
  }

  .nd-editorial {
    padding-inline: var(--container-margin-desktop);
  }

  .nd-strategies__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nd-level-example__layout {
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  }

  .nd-level-chains__layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  }

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

  .nd-cta__inner {
    padding-inline: var(--container-margin-desktop);
  }
}

@media (min-width: 1024px) {
  .nd-level-example__layout {
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    gap: var(--space-32);
  }

  .nd-level-chains__layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: var(--space-32);
  }
}

/* Mobile adjustments */
@media (max-width: 767px) {
  .nd-hero__title {
    font-size: calc(var(--text-h1-size) * 0.8);
  }

  .nd-hero {
    padding-block-start: var(--space-48);
    padding-block-end: var(--space-32);
  }

  .nd-section {
    padding-block: var(--section-spacing-mobile);
  }

  .nd-strategies__grid,
  .nd-level-example__layout,
  .nd-level-chains__layout,
  .nd-boosters__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .nd-level-example__media,
  .nd-level-chains__media {
    order: 0;
  }

  .nd-level-example__content,
  .nd-level-chains__content {
    order: 1;
  }

  .nd-cta__button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nd-card:hover {
    transform: none;
  }

  .nd-level-example__media img:hover,
  .nd-level-chains__media img:hover {
    transform: none;
  }

  .nd-resource-list a::after {
    transition: none;
  }

  .nd-cta__button:active {
    transform: none;
  }
}