/* ===== FILTERS ===== */
.diplomas-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  padding: var(--space-4);
  background: rgba(99, 146, 185, 0.03);
  border-radius: var(--card-radius);
  border: 1px solid rgba(99, 146, 185, 0.1);
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 146, 185, 0.15);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 1);
  border-color: rgba(99, 146, 185, 0.3);
  box-shadow:
    0 4px 12px rgba(99, 146, 185, 0.15),
    0 0 0 1px rgba(99, 146, 185, 0.1);
  transform: translateY(-2px);
  color: var(--color-accent);
}

.filter-btn.active {
  background: linear-gradient(135deg, #4fc3f7 0%, #29b6f6 100%);
  border-color: transparent;
  box-shadow:
    0 4px 12px rgba(99, 146, 185, 0.3),
    0 0 0 1px rgba(99, 146, 185, 0.2);
  color: white;
}

.filter-count {
  background: rgba(255,255,255,0.2);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
}

/* ===== DIPLOMAS GRID ===== */
.diplomas-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* ===== DIPLOMA CARD ===== */
.diploma-card {
  background: linear-gradient(145deg, #ffffff 0%, #fafbfc 100%);
  border: 1px solid rgba(99, 146, 185, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.06),
    0 0 0 1px rgba(99, 146, 185, 0.05);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.diploma-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #4fc3f7 0%, #29b6f6 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
  z-index: 1;
}

.diploma-card:hover::before {
  transform: scaleX(1);
}

.diploma-card:hover {
  transform: translateY(-10px);
  box-shadow:
    0 16px 40px rgba(99, 146, 185, 0.2),
    0 0 0 1px rgba(99, 146, 185, 0.15);
  border-color: rgba(99, 146, 185, 0.3);
}

.diploma-card.hidden {
  display: none;
}

/* Image Container */
.diploma-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-secondary);
}

.diploma-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(99, 146, 185, 0.1) 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.diploma-card:hover .diploma-image::after {
  opacity: 1;
}

.diploma-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.diploma-card:hover .diploma-image img {
  transform: scale(1.05);
}

.diploma-image--badge {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-bg-primary));
}

.diploma-image--badge img {
  width: 60%;
  height: auto;
  object-fit: contain;
}

/* Overlay */
.diploma-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.diploma-card:hover .diploma-overlay {
  opacity: 1;
}

.diploma-view,
.diploma-download {
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 50%;
  color: var(--color-text-primary);
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
}

.diploma-view:hover,
.diploma-download:hover {
  background: var(--color-accent);
  color: white;
  transform: scale(1.1);
}

/* Badges */
.diploma-badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.diploma-badge--degree {
  background: var(--color-degree);
  color: white;
}

.diploma-badge--certificate {
  background: var(--color-certificate);
  color: white;
}

.diploma-badge--badge {
  background: var(--color-badge);
  color: white;
}

.diploma-verified {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 50%;
  color: var(--color-certificate);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
}

/* Content */
.diploma-content {
  padding: var(--space-5);
}

.diploma-title {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.diploma-institution,
.diploma-date {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.diploma-institution i,
.diploma-date i {
  width: 16px;
  color: var(--color-accent);
}

.diploma-expiry {
  margin-left: var(--space-2);
  padding: 2px 8px;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-accent);
}

.diploma-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.diploma-skills span {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.diploma-actions {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.diploma-verify {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
}

.diploma-verify:hover {
  text-decoration: underline;
}

/* ===== MODAL ===== */
.diploma-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.diploma-modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.8);
}

.modal-container {
  position: relative;
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.diploma-modal.active .modal-container {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-primary);
  border-radius: 50%;
  font-size: var(--text-lg);
  z-index: 1;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
}

.modal-close:hover {
  background: var(--color-accent);
  color: white;
}

.modal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.modal-image {
  background: var(--color-bg-primary);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-image img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
}

.modal-info {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.modal-info h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.modal-info p {
  margin-bottom: var(--space-2);
}

.modal-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
  flex-wrap: wrap;
}