/* ================================================
   UNIFIED CARD COMPONENT SYSTEM
   ================================================ */

/* Card System Variables */
:root {
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --card-border-radius: 16px;
  --card-padding: 30px;
  --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  --card-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.12);
  --card-transition: all 0.3s ease;
}

/* Base Card - Use this as the foundation for all cards */
.card {
  background: var(--card-bg);
  border-radius: var(--card-border-radius);
  border: 2px solid var(--card-border);
  box-shadow: var(--card-shadow);
  transition: var(--card-transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

/* Card Components (BEM Methodology) */
.card__header {
  padding: 20px var(--card-padding) 15px;
  border-bottom: 1px solid var(--card-border);
}

.card__icon {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--neutral-light-bg);
  margin: 20px;
  border-radius: 12px;
  transition: var(--card-transition);
}

.card__icon svg,
.card__icon img {
  width: 48px;
  height: 48px;
  transition: var(--card-transition);
}

.card:hover .card__icon svg,
.card:hover .card__icon img {
  transform: scale(1.1);
}

.card__body {
  padding: var(--card-padding);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card__body h3,
.card__body h4 {
  font-size: 1.3rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
  font-weight: 700;
}

.card__body p {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.card__footer {
  padding: 20px var(--card-padding);
  border-top: 1px solid var(--card-border);
  background: rgba(0, 0, 0, 0.02);
  margin-top: auto;
}

.card__badge {
  position: absolute;
  top: 15px;
  right: 15px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  z-index: 3;
}

/* Card Variants (Modifiers) */

/* Feature Card - For key features section */
.card--feature {
  background: linear-gradient(145deg, var(--primary-medium-bg), var(--primary-light-bg));
  border: 2px solid var(--border-accent);
  min-height: 350px;
}

.card--feature .card__body h3,
.card--feature .card__body h4 {
  color: var(--text-light);
}

.card--feature .card__body p {
  color: var(--text-muted);
}

.card--feature .card__icon {
  background: rgba(79, 70, 229, 0.1);
}

.card--feature:hover {
  transform: translateY(-8px);
  border-color: var(--tech-cyan);
}

/* Course Card - For course listings */
.card--course {
  min-height: 300px;
}

.card--course .card__header {
  background: linear-gradient(135deg, var(--primary-action), var(--tech-purple));
  color: white;
  font-weight: 700;
  padding: 15px 20px;
  border: none;
}

.card--course .card__icon {
  height: 180px;
  background: linear-gradient(135deg, var(--neutral-light-bg), rgba(79, 70, 229, 0.05));
}

.card--course .card__icon svg,
.card--course .card__icon img {
  width: 80px;
  height: 80px;
}

.card--course .card__footer {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(245, 158, 11, 0.05));
  text-align: center;
}

/* Testimonial Card - For reviews and testimonials */
.card--testimonial {
  position: relative;
}

.card--testimonial::before {
  content: """;
  position: absolute;
  top: 20px;
  left: 25px;
  font-size: 4rem;
  color: var(--primary-action);
  opacity: 0.1;
  font-family: Georgia, serif;
}

.card--testimonial .card__body {
  position: relative;
  z-index: 2;
}

.card--testimonial:hover {
  border-color: var(--primary-action);
}

/* Info Card - For informational content */
.card--info {
  border-left: 4px solid var(--primary-action);
}

.card--info.card--success {
  border-left-color: var(--tech-green);
}

.card--info.card--warning {
  border-left-color: var(--accent-gold);
}

.card--info.card--purple {
  border-left-color: var(--tech-purple);
}

/* Pricing Card - For pricing options */
.card--pricing {
  text-align: center;
  padding: 40px;
  border: 3px solid var(--accent-gold);
}

.card--pricing .card__header {
  padding: 0 0 20px 0;
  border: none;
  background: transparent;
}

/* Glass Card - For overlay effects */
.card--glass {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Gradient Card - For premium feel */
.card--gradient {
  background: linear-gradient(145deg, var(--card-bg), var(--neutral-light-bg));
}

/* Compact Card - Smaller padding */
.card--compact .card__body {
  padding: 20px;
}

/* Elevated Card - Higher shadow */
.card--elevated {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.card--elevated:hover {
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.18);
}

/* Card Grid Layouts */
.card-grid {
  display: grid;
  gap: 30px;
  margin-top: 40px;
}

.card-grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.card-grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card-grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Responsive Card Grid */
@media (max-width: 768px) {
  .card-grid--2,
  .card-grid--3,
  .card-grid--4 {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .card__body {
    padding: 20px;
  }
}