:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --text: #f9fafb;
  --text-light: #d1d5db;
  --bg: #111827;
  --card-bg: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: radial-gradient(circle at top, #0f172a 0%, #09090b 60%);
  color: var(--text);
  font-family: "Segoe UI", sans-serif;
}

/* ===== FILTERS ===== */

.filters {
  display: flex;
  gap: 1rem;
  max-width: 700px;
  margin: 3rem auto 1rem;
  padding: 0 1.5rem;
}

.filters select,
#searchInput {
  flex: 1;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 1rem;
  backdrop-filter: blur(6px);
  transition: all 0.25s ease;
}

.filters select:focus,
#searchInput:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(16,185,129,0.15);
  outline: none;
}

.results-stats {
  text-align: center;
  font-size: 1.1rem;
  margin-bottom: 2rem;
  font-weight: 600;
  opacity: 0.9;
}

/* ===== GRID ===== */

.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 300px);
  justify-content: center;
  gap: 40px;
  margin-bottom: 5rem;
}

/* ===== MODERN CARD ===== */

.card {
  width: 300px;
  height: 470px;
  position: relative;
  border-radius: 22px;
  overflow: hidden;

  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);

  border: 1px solid var(--border);

  display: flex;
  flex-direction: column;
  transition: all 0.35s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(16,185,129,0.15), transparent 60%);
  opacity: 0;
  transition: 0.4s ease;
  pointer-events: none; /* 👈 toto pridaj */
}

.card:hover {
  transform: translateY(-10px) scale(1.03);
  border-color: rgba(16,185,129,0.4);
  box-shadow: 0 25px 50px rgba(0,0,0,0.6);
}

.card:hover::before {
  opacity: 1;
}

/* ===== IMAGE ===== */

.card-img-wrapper {
  width: 100%;
  height: 220px;
  position: relative;
  overflow: hidden;
}

.card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.card:hover .card-img-wrapper img {
  transform: scale(1.1);
}

.card-img-wrapper::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,0.8));
}

/* ===== CONTENT ===== */

.card-content {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.card-meta {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

/* ===== BUTTON ===== */

.btn-preview {
  margin-top: 1.2rem;
  padding: 0.85rem;
  border-radius: 14px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;

  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;

  transition: 0.25s ease;
}

.btn-preview:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(16,185,129,0.4);
}

/* ===== RESPONSIVE ===== */

@media (max-width: 1100px) {
  .materials-grid {
    grid-template-columns: repeat(2, 300px);
  }
}

@media (max-width: 700px) {
  .materials-grid {
    grid-template-columns: 300px;
  }

  .filters {
    flex-direction: column;
  }
}

.active-link {
    color: var(--primary-color) !important;
    font-weight: 700;
}