/* ==========================================================================
   TÜRKİYE AR-GE VAKFI - EĞİTİM KATALOĞU (TEMİZ & YALIN TASARIM)
   ========================================================================== */

.education-catalog-hero {
  border-bottom: 1px solid var(--line, #d8dfdc);
}

.catalog-hero-inner {
  margin-bottom: 0;
}

.catalog-hero-inner h1 {
  margin: 0;
  color: var(--ink, #17231f);
  font-size: 42px;
  line-height: 1.15;
}

.catalog-hero-inner p {
  max-width: 470px;
  margin: 0;
  color: var(--muted, #66736f);
  font-size: 17px;
  line-height: 1.68;
}

/* ==========================================================================
   FİLTRELER VE LİSTE ALANI
   ========================================================================== */

.education-catalog-workspace {
  padding: 48px var(--page-pad, 56px) 72px;
  background: var(--sand, #f4f6f8);
  border-bottom: 1px solid var(--line, #d8dfdc);
}

.catalog-workspace-inner {
  max-width: 1180px;
  margin: 0 auto;
}

.catalog-filter-bar {
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line, #d8dfdc);
}

.catalog-filter-scroll {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.catalog-filter-btn {
  display: flex;
  min-width: 0;
  height: 100%;
  flex-direction: column;
  align-items: flex-start;
  padding: 18px;
  border: 1px solid var(--line, #d8dfdc);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink, #17231f);
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.catalog-filter-title {
  display: block;
  margin-bottom: 9px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.catalog-filter-description {
  display: block;
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--muted, #66736f);
  overflow-wrap: anywhere;
}

.catalog-filter-btn:hover {
  background: #edf4f1;
  color: var(--deep, #14342c);
  border-color: var(--forest, #1f4d43);
}

.catalog-filter-btn:focus-visible,
.catalog-search-input:focus-visible,
.card-btn:focus-visible {
  outline: 3px solid rgba(23, 78, 166, 0.28);
  outline-offset: 2px;
}

.catalog-filter-btn.is-active {
  background: var(--deep, #14342c);
  border-color: var(--deep, #14342c);
  color: #ffffff;
}

.catalog-filter-btn.is-active .catalog-filter-description {
  color: rgba(255, 255, 255, 0.82);
}

.catalog-search-wrap {
  width: min(100%, 420px);
  margin-left: auto;
}

.catalog-search-input {
  width: 100%;
  padding: 10px 16px;
  border: 1px solid var(--line, #d8dfdc);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink, #17231f);
  font-size: 13.5px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.catalog-search-input:focus {
  border-color: var(--forest, #1f4d43);
  box-shadow: 0 0 0 3px rgba(31, 77, 67, 0.12);
}

.catalog-results-info {
  margin-bottom: 24px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--muted, #66736f);
}

/* ==========================================================================
   DERS KARTLARI
   ========================================================================== */

.course-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.course-card {
  display: flex;
  flex-direction: column;
  min-height: 240px;
  padding: 26px;
  border: 1px solid var(--line, #d8dfdc);
  border-radius: var(--radius, 8px);
  background: #ffffff;
  box-shadow: var(--shadow, 0 14px 34px rgba(20,52,44,.11));
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 38px rgba(20, 52, 44, 0.14);
}

.course-card-title {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.3;
}

.course-card-title a {
  color: var(--ink, #17231f);
  text-decoration: none;
  transition: color 0.2s ease;
}

.course-card-title a:hover {
  color: var(--forest, #1f4d43);
}

.course-card-desc {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--muted, #66736f);
  flex-grow: 1;
}

.course-card-actions {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid #edf2f0;
}

.card-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 800;
  color: var(--forest, #1f4d43);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.card-btn:hover {
  color: var(--deep, #14342c);
  transform: translateX(3px);
}

/* ==========================================================================
   BOŞ ARAMA DURUMU
   ========================================================================== */

.catalog-empty-state {
  padding: 60px 20px;
  text-align: center;
  background: #ffffff;
  border: 1px dashed var(--line, #d8dfdc);
  border-radius: var(--radius, 8px);
  margin: 20px 0;
}

.catalog-empty-state p {
  margin: 0 0 16px;
  font-size: 16px;
  color: var(--muted, #66736f);
  font-weight: 600;
}

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

@media (max-width: 1180px) {
  .catalog-filter-scroll {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .catalog-hero-inner h1 {
    font-size: 30px;
  }

  .education-catalog-workspace {
    padding: 32px 16px 48px;
  }

  .catalog-filter-bar {
    gap: 14px;
  }

  .catalog-search-wrap {
    width: 100%;
    min-width: 0;
  }

  .catalog-filter-scroll {
    grid-template-columns: 1fr;
  }

  .catalog-filter-btn {
    padding: 16px;
  }

  .course-cards-grid {
    grid-template-columns: 1fr;
  }
}