/* ====================================================================
   MAIN USE CASES — Milestone 1
   Isolated, mobile-first styles for the new solution explorer.
   ==================================================================== */
.main-use-cases {
  --muc-surface: #fbfaf8;
  --muc-surface-muted: #f1f1ef;
  --muc-border: rgba(26, 26, 46, 0.12);
  --muc-ink: #1a1a2e;
  --muc-body: #444;
  --muc-muted: #5b5d61;
  --muc-radius: 1.125rem;
  --muc-shadow: 0 1rem 2.75rem rgba(26, 26, 46, 0.055);
  --muc-shadow-hover: 0 1.2rem 3rem rgba(26, 26, 46, 0.085);
  --muc-text-min: 0.75rem;
  --muc-text-small: 0.8rem;
  --muc-readable-text: var(--type-body, 17px);
  --muc-supporting-text: var(--type-secondary, 15px);
  --muc-category-title: 17px;
  --muc-submenu-text: 17px;
  position: relative;
  overflow: hidden;
  padding: clamp(4.5rem, 8vw, 7rem) 0;
  background:
    linear-gradient(90deg, rgba(11, 48, 53, 0.025) 1px, transparent 1px),
    linear-gradient(0deg, rgba(11, 48, 53, 0.025) 1px, transparent 1px),
    var(--muc-surface);
  background-size: 3rem 3rem;
}

.main-use-cases__inner {
  position: relative;
  z-index: 1;
  /* Match the established content column used by sections such as Duo Input. */
  width: min(
    var(--container-width),
    calc(100% - var(--container-padding) * 2)
  );
  margin-inline: auto;
}

.main-use-cases__header,
.solutions-explorer__header {
  max-width: none;
  margin-inline: 0;
  text-align: left;
}

.main-use-cases__eyebrow,
.solutions-explorer__eyebrow {
  margin: 0 0 0.65rem;
  color: var(--coral-dark);
  font-family: var(--font-body);
  font-size: var(--type-eyebrow, 17px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: var(--type-eyebrow-tracking, 0.12em);
  text-transform: uppercase;
}

.main-use-cases__title,
.solutions-explorer__title {
  color: var(--muc-ink);
  font-family: var(--font-heading);
  font-size: var(--fs-section);
  font-weight: 700;
  line-height: var(--type-heading-leading, 0.95);
  text-transform: uppercase;
}

.main-use-cases__intro,
.solutions-explorer__intro {
  max-width: 44rem;
  margin: 0.85rem 0 0;
  color: #444;
  font-family: "Open Sans", Arial, sans-serif;
  font-size: var(--muc-readable-text);
  line-height: var(--type-body-leading, 1.6);
}

.use-case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: clamp(2rem, 4vw, 3.25rem);
}

.use-case-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(7.25rem, 0.85fr);
  min-height: 18.5rem;
  overflow: hidden;
  border: 1px solid var(--muc-border);
  border-radius: var(--muc-radius);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--muc-shadow);
}

.use-case-card--link {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

.use-case-card--link:focus-visible {
  outline: 3px solid var(--coral-dark);
  outline-offset: 4px;
}

.use-case-card--overlay-linked {
  position: relative;
  cursor: pointer;
}

.use-case-card__overlay-link {
  position: absolute;
  z-index: 3;
  inset: 0;
  border-radius: inherit;
}

.use-case-card__overlay-button {
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  cursor: pointer;
}

.use-case-card__overlay-link:focus-visible {
  outline: 3px solid var(--coral-dark);
  outline-offset: -4px;
}

/* The compact Duo Input keyboard remains usable above the stretched link. */
.use-case-card--overlay-linked .screen-button {
  position: relative;
  z-index: 4;
}

/* Keep the small live scoreboard controls available above the card trigger. */
.use-case-card--overlay-linked .scoreboard-preview__row {
  position: relative;
  z-index: 4;
}

.use-case-card__content {
  position: relative;
  z-index: 2;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.1rem 0.8rem 1rem 1rem;
  background: rgba(255, 255, 255, 0.96);
}

.use-case-card__icon,
.solution-category__icon,
.solution-detail__icon,
.solution-benefit__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  color: var(--coral-dark);
  background: rgba(255, 146, 118, 0.12);
}

.use-case-card__icon {
  width: 3.5rem;
  height: 3.5rem;
  margin-bottom: 0.85rem;
  border-radius: 0.8rem;
  background: transparent;
}

.use-case-card__icon svg {
  width: 3rem;
  height: 3rem;
  stroke-width: 1.8;
}

.solution-category__icon svg,
.solution-detail__icon svg,
.solution-benefit__icon svg {
  width: 1.35rem;
  height: 1.35rem;
}

.solution-benefit__icon svg path:not([opacity]) {
  stroke: currentColor;
  stroke-width: 4;
  stroke-linejoin: round;
  paint-order: stroke fill;
}

.use-case-card__title {
  color: var(--muc-ink);
  font-family: var(--font-body);
  font-size: clamp(1.06rem, 4.8vw, 1.25rem);
  font-weight: 800;
  line-height: 1.13;
  text-transform: uppercase;
}

.use-case-card__description {
  margin-top: 0.65rem;
  color: var(--muc-muted);
  font-size: var(--muc-readable-text);
  line-height: 1.48;
}

.use-case-card__product {
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(26, 26, 46, 0.09);
  color: var(--muc-ink);
  font-size: var(--muc-supporting-text);
  font-weight: 700;
  line-height: 1.35;
}

.use-case-card__product strong {
  color: var(--coral-dark);
  font-weight: 800;
}

.use-case-card__visual {
  position: relative;
  min-width: 0;
  min-height: 100%;
  overflow: hidden;
  border-left: 1px solid rgba(26, 26, 46, 0.08);
  background: var(--muc-surface-muted);
}

.use-case-visual--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% center;
}

.use-case-visual--fraud {
  isolation: isolate;
  background:
    radial-gradient(
      circle at 74% 16%,
      rgba(255, 255, 255, 0.1),
      transparent 38%
    ),
    radial-gradient(
      circle at 18% 76%,
      rgba(255, 255, 255, 0.06),
      transparent 42%
    ),
    #111315;
}

.use-case-visual--fraud::before {
  position: absolute;
  z-index: 0;
  inset: 0;
  /* Hard stops keep both X strokes 1 CSS px wide at every frame size. */
  background:
    linear-gradient(
      31deg,
      transparent calc(48.5% - 0.5px),
      rgba(255, 255, 255, 0.22) calc(48.5% - 0.5px),
      rgba(255, 255, 255, 0.22) calc(48.5% + 0.5px),
      transparent calc(48.5% + 0.5px)
    ),
    linear-gradient(
      143deg,
      transparent calc(48.6% - 0.5px),
      rgba(255, 255, 255, 0.18) calc(48.6% - 0.5px),
      rgba(255, 255, 255, 0.18) calc(48.6% + 0.5px),
      transparent calc(48.6% + 0.5px)
    ),
    radial-gradient(
      circle at 18% 23%,
      rgba(255, 255, 255, 0.72) 0 1.5px,
      transparent 2.3px
    ),
    radial-gradient(
      circle at 72% 31%,
      rgba(255, 255, 255, 0.64) 0 1.5px,
      transparent 2.3px
    ),
    radial-gradient(
      circle at 38% 66%,
      rgba(255, 255, 255, 0.68) 0 1.5px,
      transparent 2.3px
    ),
    radial-gradient(
      circle at 82% 78%,
      rgba(255, 255, 255, 0.66) 0 1.5px,
      transparent 2.3px
    );
  content: "";
  opacity: 0.9;
}

.use-case-pattern,
.use-case-pattern canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

.use-case-pattern {
  z-index: 1;
  opacity: 1;
  filter: drop-shadow(0 0 0.18rem rgba(255, 255, 255, 0.18));
}

.use-case-pattern__label {
  position: absolute;
  z-index: 2;
  right: 0.75rem;
  bottom: 0.8rem;
  left: 0.75rem;
  color: #ffffff;
}

.use-case-pattern__label span,
.use-case-pattern__label strong {
  display: block;
}

.use-case-pattern__label span {
  color: #c7cacc;
  font-size: 0.54rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.use-case-pattern__label strong {
  margin-top: 0.2rem;
  font-family: var(--font-heading);
  font-size: clamp(1.15rem, 5vw, 1.65rem);
  line-height: 1;
  letter-spacing: 0.04em;
}

/* The card reuses the real Duo Input component, but shows the compact first screen. */
.use-case-visual--duo {
  --key-size: 1.35rem;
  --key-gap: 2px;
  background: #e9e9e7;
}

.use-case-visual--duo .duo-input-section__image-wrap,
.use-case-visual--duo .signature-usecase-animation {
  width: 100%;
  max-width: none;
  height: 100%;
  margin: 0;
  padding: 0 !important;
  overflow: hidden;
  transform: none;
}

.use-case-visual--duo .signature-usecase-animation {
  display: block !important;
  perspective: none;
}

.use-case-visual--duo .signature-screen-form {
  width: 100%;
  max-width: none;
  height: 100% !important;
  min-height: 0 !important;
  padding: 0.65rem;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transform: none;
  background:
    linear-gradient(135deg, rgba(255, 216, 23, 0.08), transparent 24%),
    linear-gradient(0deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    #111719;
  background-size:
    auto,
    2rem 2rem,
    2rem 2rem,
    auto;
  border-color: rgba(255, 255, 255, 0.16);
}

.use-case-visual--duo .signature-screen-form::before {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.08),
    transparent 24%
  );
}

.use-case-visual--duo .signature-screen-sign {
  display: none;
}

.use-case-visual--duo .signature-screen-label {
  margin: 0;
  font-size: 0.48rem;
}

.use-case-visual--duo .signature-input-screen,
.use-case-visual--duo .signature-context-note,
.use-case-visual--duo .signature-line,
.use-case-visual--duo .signature-caption-left {
  right: auto;
  left: 10%;
  width: 80%;
  max-width: none;
}

.use-case-visual--duo .signature-input-screen {
  top: 16%;
  min-height: 1.65rem;
}

.use-case-visual--duo .signature-output {
  font-size: clamp(0.6rem, 2.7vw, 0.9rem);
  letter-spacing: 0.15em;
}

.use-case-visual--duo .signature-context-note {
  top: 29%;
  font-size: 0.48rem;
}

.use-case-visual--duo .signature-line {
  top: 33%;
  height: 15%;
  min-height: 0;
}

.use-case-visual--duo .signature-stroke-left {
  top: 0.15rem;
  bottom: auto;
  width: 58%;
  height: 2.1rem;
  min-height: 0;
  margin: 0;
}

.use-case-visual--duo .signature-caption-left {
  top: 52%;
  font-size: 0.48rem;
}

.use-case-visual--duo .signature-keys {
  right: auto;
  bottom: 7%;
  left: 10%;
  width: 80%;
  max-width: none;
  gap: 2px;
}

.use-case-visual--duo .screen-button,
.use-case-visual--duo .screen-button.key-blankspace {
  width: auto;
  height: clamp(1.15rem, 5vw, 1.45rem);
  min-height: 0;
  border-radius: 0.22rem;
  font-size: clamp(0.42rem, 1.8vw, 0.58rem);
}

.use-case-visual--scoreboard {
  display: flex;
  align-items: stretch;
  background:
    linear-gradient(145deg, rgba(255, 146, 118, 0.08), transparent 46%), #f1f0ed;
}

.scoreboard-preview {
  position: relative;
  display: flex;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  min-height: 0;
  align-self: stretch;
  flex: 1 1 auto;
  flex-direction: column;
  justify-content: center;
  padding: clamp(0.68rem, 2.2vw, 1rem);
  border: 0;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: none;
}

.scoreboard-preview__topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.55rem;
  color: var(--muc-ink);
}

.scoreboard-preview__eyebrow,
.scoreboard-preview__title {
  display: block;
}

.scoreboard-preview__eyebrow {
  color: var(--coral-dark);
  font-size: clamp(0.4rem, 1.8vw, 0.52rem);
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.scoreboard-preview__title {
  margin-top: 0.16rem;
  font-size: clamp(0.56rem, 2.4vw, 0.72rem);
  line-height: 1.15;
}

.scoreboard-preview__badge {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  padding: 0.24rem 0.38rem;
  border-radius: 999px;
  color: var(--coral-dark);
  background: rgba(255, 146, 118, 0.14);
  font-size: 0.4rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.scoreboard-preview__metrics {
  display: grid;
  gap: 0.08rem;
  margin-top: 0.42rem;
}

.scoreboard-preview__row {
  display: grid;
  width: 100%;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 0.25rem;
  padding: 0.36rem 0.38rem;
  border: 0;
  border-radius: 0.45rem;
  color: var(--muc-muted);
  background: transparent;
  font-family: inherit;
  font-size: clamp(0.43rem, 1.8vw, 0.56rem);
  text-align: left;
  cursor: pointer;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.scoreboard-preview__row:hover,
.scoreboard-preview__row:focus-visible,
.scoreboard-preview__row.is-selected {
  color: var(--muc-ink);
  background: rgba(255, 146, 118, 0.1);
}

.scoreboard-preview__row.is-selected {
  box-shadow: 0 0 0 1px rgba(240, 101, 72, 0.38);
}

.scoreboard-preview__row:focus-visible {
  outline: 2px solid var(--coral-dark);
  outline-offset: 2px;
}

.scoreboard-preview__row.is-activating {
  transform: translateX(0.12rem);
}

.scoreboard-preview__rank {
  color: var(--coral-dark);
  font-weight: 800;
}

.scoreboard-preview__label {
  overflow: hidden;
  color: var(--muc-ink);
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scoreboard-preview__bar {
  position: relative;
  height: 0.34rem;
  grid-column: 2 / -1;
  overflow: hidden;
  border-radius: 999px;
  background: #e4e4e1;
}

.scoreboard-preview__bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--score);
  border-radius: inherit;
  background: var(--coral);
  transition: width 0.45s ease;
}

.scoreboard-preview__row.is-activating .scoreboard-preview__bar::after {
  animation: scoreboard-fill 0.42s ease both;
}

.scoreboard-preview__star {
  color: #d4a91b;
  font-size: 0.68rem;
}

.scoreboard-preview__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.48rem;
  border-top: 1px solid rgba(26, 26, 46, 0.08);
  color: var(--muc-muted);
  font-size: 0.48rem;
}

.scoreboard-preview__summary strong {
  color: var(--coral-dark);
  font-size: 0.68rem;
}

@keyframes scoreboard-fill {
  from {
    width: 0;
  }

  to {
    width: var(--score);
  }
}

.solutions-explorer {
  margin-top: clamp(4.5rem, 9vw, 7rem);
}

.solutions-explorer__eyebrow {
  margin-bottom: 0.5rem;
}

.solution-categories {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: clamp(2rem, 4vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--muc-border);
  border-radius: var(--muc-radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--muc-shadow);
}

.solution-category + .solution-category {
  border-top: 1px solid var(--muc-border);
}

.solution-category__toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  width: 100%;
  gap: 0.65rem;
  padding: 0.78rem 0.9rem;
  border: 0;
  color: var(--muc-ink);
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    color 0.2s ease,
    background-color 0.2s ease;
}

.solution-category__toggle:hover {
  background: rgba(26, 26, 46, 0.035);
}

.solution-category__toggle:focus-visible,
.solution-item:focus-visible,
.solution-detail__close:focus-visible {
  outline: 3px solid rgba(240, 101, 72, 0.72);
  outline-offset: -3px;
}

.solution-category__icon {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 0;
  color: var(--muc-ink);
  background: transparent;
}

.solution-category__icon svg {
  width: 1.55rem;
  height: 1.55rem;
}

.solution-category__name {
  min-width: 0;
  padding-right: 0.2rem;
  font-family: var(--font-body);
  font-size: var(--muc-category-title);
  font-weight: 800;
  line-height: 1.25;
}

.solution-category__name small {
  color: var(--muc-muted);
  font-size: var(--muc-text-min);
  font-weight: 600;
}

.solution-category__name-first-line {
  font-size: 1em;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.solution-category__name-second-line {
  white-space: nowrap;
}

.solution-category__chevron {
  width: 0.6rem;
  height: 0.6rem;
  margin-right: 0.1rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  justify-self: end;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.24s ease;
}

.solution-category__toggle[aria-expanded="true"] .solution-category__chevron {
  transform: rotate(225deg) translate(-2px, -2px);
}

.solution-category__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.solution-category__toggle[aria-expanded="true"] + .solution-category__body {
  grid-template-rows: 1fr;
}

.solution-category__body-inner {
  min-height: 0;
  overflow: hidden;
}

.solution-item {
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: calc(100% - 2rem);
  gap: 0.75rem;
  margin: 0 1rem;
  padding: 0.52rem 0.5rem;
  border: 0;
  border-top: 1px solid rgba(26, 26, 46, 0.08);
  color: var(--muc-muted);
  background: transparent;
  font-family: var(--font-body);
  font-size: var(--muc-submenu-text);
  line-height: 1.45;
  text-align: left;
  cursor: pointer;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    box-shadow 0.2s ease;
}

.solution-item:hover,
.solution-item.is-active {
  color: var(--muc-ink);
  background: rgba(26, 26, 46, 0.055);
}

.solution-item.is-active {
  font-weight: 800;
  box-shadow: inset 3px 0 0 rgba(26, 26, 46, 0.5);
}

.solution-item.is-active span:last-child {
  transform: translateX(0.2rem);
}

.solutions-explorer__hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--muc-border);
  border-top: 0;
  border-radius: 0 0 var(--muc-radius) var(--muc-radius);
  color: var(--muc-muted);
  background: rgba(255, 255, 255, 0.76);
  font-size: var(--muc-readable-text);
  line-height: 1.4;
  text-align: center;
}

.solution-detail {
  margin-top: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--muc-border);
  border-radius: var(--muc-radius);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--muc-shadow);
  opacity: 0;
  transform: translateY(0.75rem);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

.solution-detail[hidden] {
  display: none;
}

.solution-detail.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.gamification-detail {
  margin-top: 1.25rem;
}

.gamification-detail__icon {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  border-radius: 50%;
  color: var(--coral-dark);
  background: rgba(255, 146, 118, 0.16);
}

.gamification-detail__icon svg {
  width: 1.7rem;
  height: 1.7rem;
}

.solution-detail__header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.85rem;
  padding: 1.15rem;
  border-bottom: 1px solid var(--muc-border);
  background: linear-gradient(
    90deg,
    rgba(255, 146, 118, 0.08),
    transparent 58%
  );
}

.solution-detail__icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  color: var(--muc-ink);
  background: rgba(26, 26, 46, 0.055);
}

.solution-detail__category {
  margin: 0;
  color: var(--coral-dark);
  font-size: var(--muc-supporting-text);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.solution-detail__title {
  margin-top: 0.2rem;
  color: var(--muc-ink);
  font-family: var(--font-body);
  font-size: clamp(1.25rem, 3.5vw, 1.65rem);
  font-weight: 800;
  line-height: 1.2;
  text-transform: none;
}

.solution-detail__close {
  width: 2.3rem;
  height: 2.3rem;
  border: 0;
  border-radius: 50%;
  color: var(--muc-ink);
  background: rgba(26, 26, 46, 0.06);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.solution-detail__close:hover {
  color: #ffffff;
  background: var(--coral-dark);
  transform: scale(1.04);
}

.solution-detail__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  padding: 1.15rem;
}

.solution-detail__body > * {
  min-width: 0;
}

.solution-detail__body > * + * {
  padding-top: 1.25rem;
  border-top: 1px solid var(--muc-border);
}

.solution-detail__visual {
  position: relative;
  min-width: 0;
  min-height: 0;
  aspect-ratio: 1 / 1;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--muc-border);
  border-radius: calc(var(--muc-radius) - 0.125rem);
  background: #fff;
}

.solution-detail__visual img {
  position: absolute;
  inset: 0;
  display: block;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  min-height: 0;
  border-radius: inherit;
  object-fit: cover;
  object-position: center;
  background: #fff;
}

.solution-detail__visual[data-fit="contain"] img {
  padding: clamp(0.35rem, 1.5vw, 0.8rem);
  object-fit: contain;
}

.solution-detail__body h4 {
  margin: 0 0 0.65rem;
  color: var(--muc-ink);
  font-family: var(--font-body);
  font-size: var(--muc-readable-text);
  font-weight: 800;
  line-height: 1.2;
  text-transform: none;
}

.solution-detail__summary p,
.solution-detail__benefits li,
.solution-detail__process li {
  color: var(--muc-muted);
  font-size: var(--muc-readable-text);
  line-height: 1.55;
}

.solution-detail__summary p {
  color: var(--muc-body);
  font-size: var(--muc-readable-text);
  font-weight: 400;
}

.solution-detail__benefits ul,
.solution-detail__process ol {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.solution-detail__benefits li,
.solution-detail__process li {
  position: relative;
  padding-left: 1.75rem;
}

.solution-detail__benefits li::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 1.2rem;
  height: 1.2rem;
  place-items: center;
  border-radius: 50%;
  color: var(--coral-dark);
  background: rgba(255, 146, 118, 0.13);
  font-size: 0.7rem;
  font-weight: 900;
}

.solution-detail__process {
  counter-reset: muc-step;
}

.solution-detail__process li {
  counter-increment: muc-step;
}

.solution-detail__process li::before {
  content: counter(muc-step, decimal-leading-zero);
  position: absolute;
  top: 0;
  left: 0;
  color: var(--coral-dark);
  font-size: 0.66rem;
  font-weight: 900;
}

.solution-benefits {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--muc-border);
  border-radius: var(--muc-radius);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--muc-shadow);
}

.solution-benefit {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 0.85rem;
  padding: 1rem;
}

.solution-benefit + .solution-benefit {
  border-top: 1px solid var(--muc-border);
}

.solution-benefit__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.7rem;
  color: var(--muc-ink);
  background: rgba(26, 26, 46, 0.055);
  margin-top: 0.1rem;
}

.solution-benefit h3 {
  color: var(--muc-ink);
  font-family: var(--font-body);
  font-size: var(--muc-readable-text);
  font-weight: 800;
  line-height: 1.3;
  text-transform: none;
}

.solution-benefit p {
  margin-top: 0.2rem;
  color: var(--muc-muted);
  font-size: var(--muc-readable-text);
  line-height: 1.45;
}

@media (max-width: 359px) {
  .use-case-card {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
  }

  .use-case-card .use-case-card__content {
    min-height: 20rem;
    padding: 1.15rem;
  }

  .use-case-card__visual {
    flex: 1 1 15.5rem;
    width: 100%;
    height: auto;
    min-height: 15.5rem;
    border-top: 1px solid rgba(26, 26, 46, 0.08);
    border-left: 0;
  }

  .scoreboard-preview {
    padding: 1rem;
  }

  .scoreboard-preview__eyebrow {
    font-size: 0.52rem;
  }

  .scoreboard-preview__title {
    font-size: 0.72rem;
  }

  .scoreboard-preview__row {
    font-size: 0.56rem;
  }

  .scoreboard-preview__summary {
    font-size: 0.52rem;
  }
}

@media (min-width: 360px) and (max-width: 639px) {
  .use-case-card {
    grid-template-columns: minmax(0, 1fr) minmax(8.8rem, 1fr);
  }

  .use-case-card .use-case-card__content {
    padding-right: 0.7rem;
  }

  .use-case-card--photo .use-case-visual--photo {
    background: #d7d6d2;
  }

  .use-case-card--photo .use-case-visual--photo img {
    height: 100%;
    padding: 0;
    object-fit: cover;
    object-position: 48% center;
    filter: none;
  }

}

/* Phone cards use one shared vertical rhythm: copy first, full-width visual below. */
@media (max-width: 479px) {
  .use-case-card {
    display: flex;
    min-height: 0;
    flex-direction: column;
  }

  .use-case-card .use-case-card__content {
    min-height: 0;
    padding: 1.15rem;
  }

  .use-case-card .use-case-card__product {
    margin-top: 1rem;
  }

  .use-case-card .use-case-card__visual {
    width: 100%;
    height: 14rem;
    min-height: 14rem;
    border-top: 1px solid rgba(26, 26, 46, 0.08);
    border-left: 0;
  }

  .use-case-card--gamification .scoreboard-preview {
    justify-content: center;
    padding: 1rem 1.1rem;
  }

  .use-case-card--gamification .scoreboard-preview__eyebrow {
    font-size: 0.55rem;
  }

  .use-case-card--gamification .scoreboard-preview__title {
    font-size: 0.78rem;
  }

  .use-case-card--gamification .scoreboard-preview__badge {
    padding: 0.28rem 0.48rem;
    font-size: 0.43rem;
  }

  .use-case-card--gamification .scoreboard-preview__metrics {
    gap: 0.12rem;
    margin-top: 0.58rem;
  }

  .use-case-card--gamification .scoreboard-preview__row {
    gap: 0.35rem;
    padding: 0.42rem 0.5rem;
    font-size: 0.6rem;
  }

  .use-case-card--gamification .scoreboard-preview__bar {
    height: 0.42rem;
  }

  .use-case-card--gamification .scoreboard-preview__summary {
    margin-top: 0.5rem;
    padding-top: 0.55rem;
    font-size: 0.58rem;
  }
}

@media (min-width: 640px) {
  .use-case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem;
  }

  .use-case-card {
    display: flex;
    align-self: start;
    min-height: 0;
    flex-direction: column;
  }

  .use-case-card__content {
    min-height: 17rem;
    padding: 1.35rem;
  }

  .use-case-card__title {
    font-size: 1.3rem;
  }

  .use-case-card__description {
    font-size: var(--muc-readable-text);
  }

  .use-case-card__product {
    min-height: 2.75rem;
    font-size: var(--muc-supporting-text);
    transform: translateY(0.4rem);
  }

  .use-case-card__visual {
    width: 100%;
    height: 15.5rem;
    min-height: 15.5rem;
    border-top: 1px solid rgba(26, 26, 46, 0.08);
    border-left: 0;
  }

  .use-case-visual--duo .screen-button,
  .use-case-visual--duo .screen-button.key-blankspace {
    height: 1.55rem;
    font-size: 0.58rem;
  }

  .scoreboard-preview__row {
    font-size: 0.64rem;
  }

  .scoreboard-preview__bar {
    height: 0.42rem;
  }

  .scoreboard-preview__summary {
    font-size: 0.58rem;
  }

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

  .solution-category:nth-child(even) {
    border-left: 1px solid var(--muc-border);
  }

  .solution-category:nth-child(2) {
    border-top: 0;
  }

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

  .solution-benefit:nth-child(even) {
    border-left: 1px solid var(--muc-border);
  }

  .solution-benefit:nth-child(2) {
    border-top: 0;
  }
}

/*
 * From tablet-width cards upward the gamification visual can be taller than
 * its compact scoreboard content. Let the three results share that available
 * height instead of leaving one large empty area above the summary.
 */
@media (min-width: 480px) {
  .use-case-card--gamification .scoreboard-preview {
    justify-content: flex-start;
  }

  .use-case-card--gamification .scoreboard-preview__metrics {
    display: flex;
    min-height: 0;
    flex: 1 1 auto;
    flex-direction: column;
    justify-content: space-evenly;
    gap: 0.12rem;
    margin-top: 0.28rem;
  }

  .use-case-card--gamification .scoreboard-preview__summary {
    flex: 0 0 auto;
    margin-top: 0.3rem;
  }
}

/* The side-by-side 600px layout has enough room for a more legible scoreboard. */
@media (min-width: 480px) and (max-width: 639px) {
  .use-case-card--gamification .scoreboard-preview {
    padding: 1rem;
  }

  .use-case-card--gamification .scoreboard-preview__eyebrow {
    font-size: 0.58rem;
  }

  .use-case-card--gamification .scoreboard-preview__title {
    margin-top: 0.22rem;
    font-size: 0.82rem;
  }

  .use-case-card--gamification .scoreboard-preview__badge {
    padding: 0.3rem 0.48rem;
    font-size: 0.46rem;
  }

  .use-case-card--gamification .scoreboard-preview__row {
    gap: 0.35rem;
    padding: 0.5rem;
    font-size: 0.68rem;
  }

  .use-case-card--gamification .scoreboard-preview__bar {
    height: 0.46rem;
  }

  .use-case-card--gamification .scoreboard-preview__star {
    font-size: 0.82rem;
  }

  .use-case-card--gamification .scoreboard-preview__summary {
    padding-top: 0.58rem;
    font-size: 0.62rem;
  }

  .use-case-card--gamification .scoreboard-preview__summary strong {
    font-size: 0.78rem;
  }
}

@media (min-width: 768px) {
  .solution-detail__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.9fr) minmax(16rem, 1.2fr);
    gap: 0;
    padding: 1.5rem;
  }

  .solution-detail__body > * {
    padding-inline: 1.5rem;
  }

  .solution-detail__body > *:first-child {
    padding-left: 0;
  }

  .solution-detail__body > *:last-child {
    padding-right: 0;
  }

  .solution-detail__body > * + * {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--muc-border);
  }

  .solution-detail__visual {
    min-height: 0;
    margin-left: 0;
    border-radius: 0.85rem;
  }

  .solution-detail__visual img {
    min-height: 0;
  }
}

@media (min-width: 1200px) {
  .solution-detail__body {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 0.9fr) minmax(21rem, 1.25fr);
  }

  .solution-detail__visual {
    min-height: 0;
  }
}

/* Give the full desktop presentation enough visual weight at 1440 × 900.
   Smaller reference viewports keep the more compact rules above. */
@media (min-width: 1280px) and (min-height: 800px) {
  .solution-category__toggle {
    gap: 0.8rem;
    padding: 0.95rem 1rem;
  }

  .solution-category__icon {
    width: 2.05rem;
    height: 2.05rem;
  }

  .solution-category__icon svg {
    width: 1.75rem;
    height: 1.75rem;
  }

  .solution-category__name {
    font-size: var(--muc-category-title);
  }

  .solution-category__name small {
    font-size: 0.79rem;
  }

  .solution-item {
    padding-block: 0.65rem;
    font-size: var(--muc-submenu-text);
  }

  .solutions-explorer__hint {
    font-size: var(--muc-readable-text);
  }

  .solution-detail__header {
    gap: 1rem;
    padding: 1.35rem 1.5rem;
  }

  .solution-detail__icon {
    width: 3.4rem;
    height: 3.4rem;
  }

  .solution-detail__icon svg {
    width: 1.6rem;
    height: 1.6rem;
  }

  .solution-detail__category {
    font-size: var(--muc-supporting-text);
  }

  .solution-detail__title {
    font-size: 1.9rem;
  }

  .solution-detail__lead {
    font-size: var(--muc-readable-text);
  }

  .solution-detail__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr) minmax(23rem, 1.2fr);
    min-height: 20rem;
    padding-block: 1.75rem;
  }

  .solution-detail__body h4 {
    margin-bottom: 0.85rem;
    font-size: var(--muc-readable-text);
  }

  .solution-detail__summary p {
    font-size: var(--muc-readable-text);
    line-height: 1.55;
  }

  .solution-detail__benefits ul {
    gap: 0.8rem;
  }

  .solution-detail__benefits li {
    min-height: 1.4rem;
    padding-left: 2rem;
    font-size: var(--muc-readable-text);
    line-height: 1.5;
  }

  .solution-detail__benefits li::before {
    width: 1.4rem;
    height: 1.4rem;
    font-size: 0.8rem;
  }

  .solution-detail__visual {
    min-height: 0;
  }

  .solution-detail__visual[data-fit="contain"] img {
    padding: 0.25rem;
    transform: scale(1.08);
  }

  .solution-benefit {
    gap: 1rem;
    padding: 1.15rem;
  }

  .solution-benefit__icon {
    width: 2.85rem;
    height: 2.85rem;
  }

  .solution-benefit__icon svg {
    width: 1.55rem;
    height: 1.55rem;
  }

  .solution-benefit h3 {
    font-size: var(--muc-readable-text);
  }

  .solution-benefit p {
    font-size: var(--muc-readable-text);
  }
}

@media (min-width: 960px) {
  .use-case-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .use-case-card {
    height: 100%;
    align-self: stretch;
  }

  .use-case-card__content {
    min-height: 18.5rem;
    flex: 1 1 auto;
    padding: 1.2rem;
  }

  .use-case-card__title {
    min-height: 3.39em;
  }

  .use-case-card__visual {
    flex: 0 0 14rem;
    height: 14rem;
    min-height: 14rem;
  }

  .solution-categories {
    grid-template-columns:
      minmax(0, 1.12fr) minmax(0, 1fr) minmax(0, 1.07fr)
      minmax(0, 1fr);
  }

  .solution-category,
  .solution-category:nth-child(2) {
    border-top: 0;
  }

  .solution-category + .solution-category {
    border-left: 1px solid var(--muc-border);
  }

  .solution-category__toggle {
    column-gap: 0.55rem;
    min-height: 4.2rem;
    padding-inline: 0.8rem;
  }

  .solution-category__name {
    font-size: var(--muc-category-title);
  }

  .solution-item {
    min-height: 2.55rem;
    font-size: var(--muc-submenu-text);
  }

  .solution-benefits {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .solution-benefit,
  .solution-benefit:nth-child(2) {
    border-top: 0;
  }

  .solution-benefit + .solution-benefit {
    border-left: 1px solid var(--muc-border);
  }

  .solution-benefit h3 {
    min-height: 2.6em;
  }
}

/* On wide desktop screens there is enough room to improve readability
   without making the four-column layout wrap or overflow. */
@media (min-width: 1280px) {
  .main-use-cases__intro,
  .solutions-explorer__intro {
    font-size: 18px;
  }

  .use-case-card__title {
    font-size: 1.35rem;
  }

  .use-case-card__description {
    font-size: var(--muc-readable-text);
    line-height: 1.5;
  }

  .use-case-card__product {
    font-size: var(--muc-supporting-text);
  }

  .solution-category__name {
    font-size: var(--muc-category-title);
  }

  .solution-category__name small {
    font-size: 0.76rem;
  }

  .solution-item {
    font-size: var(--muc-submenu-text);
    line-height: 1.4;
  }

  .solutions-explorer__hint {
    font-size: var(--muc-readable-text);
  }

  .solution-benefit p {
    font-size: var(--muc-readable-text);
    line-height: 1.5;
  }
}

@media (hover: hover) and (pointer: fine) {
  .use-case-card {
    transition:
      transform 0.25s ease,
      box-shadow 0.25s ease,
      border-color 0.25s ease;
  }

  .use-case-card:hover {
    border-color: rgba(255, 146, 118, 0.5);
    box-shadow: var(--muc-shadow-hover);
    transform: translateY(-0.2rem);
  }
}