/* --- Calculator Cards Grid (Homepage) --- */
.calculator-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

@media (min-width: 960px) {
  .calculator-cards-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .calculator-cards-grid {
    grid-template-columns: 1fr;
  }
}

.calculator-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background-color: var(--surface-color);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  /* Smooth modern rounded corners */
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.calculator-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  /* Sleek dynamic lift on hover */
  box-shadow: var(--card-shadow-hover);
}

/* Card Header - with a beautiful subtle background that separates it */
.card-header {
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-color);
  /* Crisp contrast background separating title from features */
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.calculator-card:hover .card-header {
  background-color: var(--card-header-hover-bg);
  border-color: var(--card-header-hover-border);
}

/* Card Title - Clean, clear modern sans-serif font */
.calculator-card h3.card-title {
  font-family: inherit;
  /* Inherit the exact same font stack as the page headers and body */
  color: var(--primary-color);
  /* Retain the original premium brand blue colour */
  font-size: 1.125rem;
  font-weight: 600;
  /* Sleeker, less aggressive semi-bold weight */
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin: 0;
  padding: 0;
  text-transform: none;
  /* Clear, normal title casing for perfect readability */
  transition: color 0.3s ease;
}

.calculator-card:hover h3.card-title {
  color: var(--primary-hover);
  /* Brand hover highlight color */
}

/* Card Arrow Icon - Premium slide animation on hover */
.card-arrow-icon {
  width: 1.15rem;
  height: 1.15rem;
  color: var(--text-muted);
  opacity: 0.5;
  transform: translateX(-4px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.calculator-card:hover .card-arrow-icon {
  color: var(--primary-color);
  opacity: 1;
  transform: translateX(0);
}

/* Card Features (Key Variables Modelled) */
.card-features {
  padding: 1.25rem 1.5rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  /* Aligns layouts vertically */
}

.card-features-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
}

.card-features-list li {
  display: flex;
  justify-content: space-between;
  /* Dynamic spacing between parameter and mock value */
  align-items: center;
  padding: 0.35rem 0;
  /* Slightly tighter vertical padding for a sleek borderless look */
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.8125rem;
  line-height: 1.4;
}

.tech-param-name {
  color: var(--text-main);
  opacity: 0.85;
  /* Slightly muted label */
}

.tech-param-value {
  color: var(--primary-light);
  /* Lighter blue than the title (primary-color) */
  font-weight: 500;
  /* Subtle, elegant weight */
}



/* --- Show More Parameters Button Styles --- */
.show-more-container {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--border-color);
  /* Soft separation line */
}

.show-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: none;
  border: none;
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  cursor: pointer;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
}

.show-more-btn:hover {
  color: var(--primary-hover);
  background-color: var(--show-more-hover-bg);
  border-color: var(--show-more-hover-border);
}

.toggle-chevron {
  width: 0.75rem;
  height: 0.75rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.show-more-btn.expanded .toggle-chevron {
  transform: rotate(180deg);
}

/* --- Clickable Calculator Card Pointer & Signup Styles --- */
.calculator-grid__card--clickable {
  cursor: pointer;
}

.calculator-grid__signup-wrapper {
  margin-top: 2.5rem;
  text-align: center;
}

.calculator-grid__signup-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.875rem 2rem;
  border-radius: 0.75rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 100%);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 1.0625rem;
  text-decoration: none !important;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.28);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.calculator-grid__signup-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(79, 70, 229, 0.38);
}

.calculator-grid__signup-notice {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}