/* ================================================================
   CHALLENGE.CSS — Prize cards, Steps, Accordion
   ================================================================ */

/* === PRIZE GRID === */
.prize-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-md);
  align-items: start;
}

/* Main prize card — dominant */
.prize-card {
  position: relative;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-med);
}

.prize-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(103,72,0,0.2);
}

/* First prize card — hero treatment */
.prize-card--hero {
  grid-column: 1 / -1;
  background: var(--color-dark);
  color: #f7f7f4;
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .prize-card--hero {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.prize-card--hero:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-dark);
}

/* Giant ghost number behind first prize */
.prize-card--hero::before {
  content: "1.";
  position: absolute;
  bottom: -24px;
  right: -12px;
  font-size: 160px;
  font-weight: var(--weight-bold);
  line-height: 1;
  color: rgba(255,255,255,0.06);
  letter-spacing: -0.04em;
  pointer-events: none;
  user-select: none;
}

.prize-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--color-accent);
}

.prize-card--hero strong {
  color: #f0d898;
  font-size: var(--text-4xl);
}

.prize-card h3 {
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.prize-card--hero h3 {
  color: rgba(247,247,244,0.95);
  font-size: var(--text-2xl);
}

.prize-card p, .prize-card ul {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.prize-card--hero p, .prize-card--hero ul {
  color: rgba(247,247,244,0.6);
  font-size: var(--text-md);
  padding-left: var(--space-md);
}

.prize-card--hero li {
  margin-bottom: 6px;
}

/* === STEPS === */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
  counter-reset: steps;
}

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

.step-card {
  position: relative;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  counter-increment: steps;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-med);
  text-align: center;
}

.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(38,128,104,0.25);
}

.step-card .icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
  transition: transform var(--transition);
}

.step-card:hover .icon {
  transform: scale(1.1);
}

.step-card h3 {
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* === ACCORDION === */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  transition: background var(--transition);
}

.accordion__trigger:hover {
  background: var(--color-primary-light);
}

.accordion__trigger .icon {
  flex: 0 0 auto;
  transition: transform var(--transition-med);
  color: var(--color-primary);
}

.accordion.is-open .accordion__trigger .icon {
  transform: rotate(45deg);
}

.accordion__content {
  display: none;
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-muted);
  white-space: pre-line;
  font-size: var(--text-sm);
  line-height: var(--line-body);
  border-top: 1px solid var(--color-border);
}

.accordion.is-open .accordion__content {
  display: block;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .prize-grid {
    grid-template-columns: 1fr;
  }

  .prize-card--hero::before {
    font-size: 100px;
  }

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

@media (max-width: 640px) {
  .steps--four {
    grid-template-columns: 1fr;
  }
}