/* ==========================================================================
   Components - Buttons, Cards, Grids, Utilities
   ========================================================================== */

/* Modern Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space) var(--space-xl);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.025em;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn.accent {
  color: var(--white);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  box-shadow: var(--shadow-md);
}

.btn.accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.btn.ghost {
  color: var(--primary);
  background: transparent;
  border: 2px solid var(--primary);
}

.btn.ghost:hover {
  color: var(--white);
  background: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn.secondary {
  color: var(--white);
  background: linear-gradient(135deg, var(--secondary) 0%, #34d399 100%);
  box-shadow: var(--shadow-md);
}

.btn.secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--success) 0%, var(--secondary) 100%);
}

.btn.primary {
  background: #6d28d9;
  color: #fff;
}

.btn.primary:hover {
  filter: brightness(0.95);
}

/* Modern Card System */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
  padding: var(--space-2xl);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-2px);
}

/* Grid Systems */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-xl);
}

/* Key-Value Grid */
.kv {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-lg);
}

.kv .kv-item {
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.kv .kv-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.kv .kv-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: var(--white);
}

.kv .kv-item strong {
  display: block;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Publication Cards */
.pub {
  padding: var(--space-xl);
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.pub::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

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

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
}

.gallery img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  border: 2px solid var(--white);
}

.gallery img:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

/* Icon Helpers */
.icon {
  width: 20px;
  height: 20px;
  vertical-align: middle;
  margin-right: 8px;
  opacity: 0.9;
  flex-shrink: 0;
}