.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
  display: flex;
  flex-direction: column;
  isolation: isolate;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-lg);
}

/* Blueprint corner brackets — small, anchored to card outer */
.card > .corner {
  position: absolute;
  width: 14px; height: 14px;
  border: 1.5px solid var(--cyan-deep);
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 3;
  pointer-events: none;
}
.card:hover > .corner { opacity: 0.9; }
.card > .corner.tl { top: 5px; left: 5px; border-right: none; border-bottom: none; }
.card > .corner.tr { top: 5px; right: 5px; border-left: none; border-bottom: none; }
.card > .corner.bl { bottom: 5px; left: 5px; border-right: none; border-top: none; }
.card > .corner.br { bottom: 5px; right: 5px; border-left: none; border-top: none; }

/* PHOTO area */
.card-photo {
  position: relative;
  aspect-ratio: 4 / 5;
  width: 100%;
  background: linear-gradient(135deg, #E7F1FA, #D5E5F2);
  overflow: hidden;
}
.card-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.card:hover .card-photo img { transform: scale(1.04); }

/* Initials fallback when no photo */
.card-photo .initials {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-weight: 800;
  font-size: 76px;
  color: var(--cyan-deep);
  letter-spacing: 0.04em;
  background:
    radial-gradient(circle at 50% 38%, rgba(14, 165, 233, 0.22), transparent 60%),
    repeating-linear-gradient(45deg, rgba(14, 165, 233, 0.05) 0 6px, transparent 6px 12px);
  text-shadow: 0 2px 18px rgba(14, 165, 233, 0.35);
}

/* Photo gradient overlay for badges/buttons */
.card-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 34, 64, 0.30) 0%, transparent 22%, transparent 62%, rgba(11, 34, 64, 0.45) 100%);
  pointer-events: none;
}

/* Class badge — top-left */
.class-badge {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 2;
  padding: 5px 14px 5px 11px;
  background: var(--cyan-deep);
  color: #fff;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-radius: 3px;
  box-shadow: 0 6px 16px -6px rgba(3, 105, 161, 0.6);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 50%, 100% 100%, 0 100%);
}
.class-badge::before {
  content: 'LỚP ';
  opacity: 0.7;
}

/* Photo action buttons (edit / delete) — top-right */
.photo-actions {
  position: absolute;
  top: 10px; right: 10px;
  z-index: 2;
  display: flex;
  gap: 6px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.2s, transform 0.2s;
}
.card:hover .photo-actions { opacity: 1; transform: translateY(0); }
.photo-actions button {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(11, 34, 64, 0.12);
  color: var(--ink);
  cursor: pointer;
  display: grid;
  place-items: center;
  backdrop-filter: blur(6px);
  transition: all 0.15s;
  font-size: 14px;
  line-height: 1;
  box-shadow: 0 4px 10px rgba(11, 34, 64, 0.18);
}
.photo-actions button:hover { background: var(--cyan-deep); color: #fff; border-color: var(--cyan-deep); }
.photo-actions button.act-del:hover { background: var(--danger); border-color: var(--danger); color: #fff; }
.photo-actions svg { width: 14px; height: 14px; }

/* Member code chip — bottom-left over photo */
.card-code {
  position: absolute;
  bottom: 10px; left: 12px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: #fff;
  background: rgba(3, 105, 161, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 3px 8px;
  border-radius: 3px;
  backdrop-filter: blur(4px);
  font-weight: 600;
}

/* INFO section */
.card-info {
  padding: 16px 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex: 1;
}
.card-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 0 0 4px;
  line-height: 1.22;
  word-break: break-word;
}

.info-row {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  color: var(--ink-dim);
  font-size: 13.5px;
  line-height: 1.4;
}
.info-row .ico {
  flex-shrink: 0;
  width: 16px; height: 16px;
  color: var(--cyan-deep);
  margin-top: 1px;
}
.info-row.is-loc .ico { color: var(--amber-deep); }
.info-row strong { color: var(--ink); font-weight: 500; }

.card-bio {
  margin-top: 4px;
  color: var(--ink-faint);
  font-size: 12.5px;
  line-height: 1.5;
  font-style: italic;
  border-left: 2px solid var(--line);
  padding-left: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-foot {
  margin-top: auto;
  padding: 11px 18px 14px;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.card-links { display: flex; gap: 8px; flex-wrap: wrap; }

.link-btn {
  width: 32px; height: 32px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  color: var(--ink-dim);
  transition: all 0.15s;
  background: var(--panel);
  cursor: pointer;
  text-decoration: none;
}
.link-btn:hover {
  color: #fff;
  border-color: var(--cyan-deep);
  background: var(--cyan-deep);
  transform: translateY(-2px);
}
.link-btn svg { width: 15px; height: 15px; }

.foot-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.foot-tag-empty { opacity: 0.7; }

@media (max-width: 520px) {
  .grid { grid-template-columns: 1fr; gap: 16px; }
}