/* Root Colors */
:root {
  --white-color: #ffffff;
  --primary-color: #21014a;
  --secondary-color: #ff8a1d;
  --section-bg-color: #f8f5ff;
  --dark-color: #333333;
  --p-color: #555555;
  --border-color: #e0e0e0;
  --card-shadow: 0 8px 15px rgba(33, 1, 74, 0.1);
  --hover-shadow: 0 12px 20px rgba(33, 1, 74, 0.2);

  /* Level colors */
  --beginner-color: #4caf50;
  --intermediate-color: #2196f3;
  --advanced-color: #9c27b0;

  /* Category colors */
  --grammar-color: #ff5722;
  --vocabulary-color: #3f51b5;
  --speaking-color: #ffc107;
  --writing-color: #00bcd4;
}

/* General Body Styling */
body {
  font-family: "Arial", sans-serif;
  background-color: var(--section-bg-color);
  color: var(--dark-color);
  line-height: 1.6;
  padding-top: 80px;
}

/* Navbar Styling */
.navbar {
  background: linear-gradient(135deg, var(--primary-color), #3a0c72);
  padding: 15px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}

/* Navbar Container Ortalaması */
.navbar .container {
  justify-content: center !important;
}


.navbar-brand {
  font-weight: bold;
  font-size: 1.5rem;
  color: var(--white-color);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  transition: all 0.3s ease;
  margin: 0 auto;
}

.navbar-brand img {
  margin-right: 12px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.navbar-brand span {
  font-weight: 700;
  color: var(--white-color);
  text-transform: uppercase;
  text-align: center;
  font-size: 1.5rem;
}

/* Main Section */
main {
  padding: 30px 0 60px;
}

.main-title {
  font-size: 2.5rem;
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 20px;
  font-weight: 700;
  text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
}

.main-description {
  text-align: center;
  font-size: 1.1rem;
  color: var(--p-color);
  max-width: 800px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.section-title {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 25px;
  font-weight: 600;
  position: relative;
  padding-bottom: 10px;
}

.section-title:after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background-color: var(--secondary-color);
}

/* Filter Section */
.filter-section {
  background-color: var(--white-color);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--card-shadow);
}

.search-box {
  position: relative;
}

.search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--p-color);
}

#searchInput {
  padding-left: 40px;
  border-radius: 30px;
  border: 1px solid var(--border-color);
}

.form-select {
  border-radius: 30px;
  border: 1px solid var(--border-color);
}

/* Upload Section */
.upload-section {
  margin-top: 30px;
}

.upload-card {
  background-color: var(--white-color);
  border-radius: 15px;
  padding: 25px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}

.upload-card h3 {
  color: var(--primary-color);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.upload-card p {
  color: var(--p-color);
  margin-bottom: 20px;
}

.btn-file {
  background-color: var(--section-bg-color);
  color: var(--primary-color);
  border: 1px dashed var(--primary-color);
  padding: 10px 15px;
  border-radius: 30px;
  cursor: pointer;
  text-align: center;
  transition: all 0.3s ease;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-file:hover {
  background-color: var(--primary-color);
  color: var(--white-color);
}

.btn-upload {
  background: linear-gradient(to right, var(--secondary-color), #ff9f45);
  color: var(--white-color);
  padding: 10px 25px;
  border-radius: 30px;
  border: none;
  font-weight: 600;
  box-shadow: 0 4px 8px rgba(255, 138, 29, 0.3);
  transition: all 0.3s ease;
}

.btn-upload:hover {
  background: linear-gradient(to right, #ff9f45, var(--secondary-color));
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(255, 138, 29, 0.4);
}

/* Worksheets Cards */
.worksheets-section {
  margin-top: 40px;
}

.doc-card {
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 25px;
  background-color: var(--white-color);
  box-shadow: var(--card-shadow);
  transition: all 0.4s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.doc-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--hover-shadow);
  border-color: var(--secondary-color);
}

.doc-card h3 {
  color: var(--primary-color);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 15px;
  line-height: 1.4;
  margin-top: 10px;
}

.doc-card p {
  color: var(--p-color);
  margin-bottom: 20px;
}

.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.doc-card a {
  display: inline-block;
  background: linear-gradient(to right, var(--secondary-color), #ff9f45);
  color: var(--white-color);
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 30px;
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 8px rgba(255, 138, 29, 0.3);
  border: none;
}

.doc-card a:hover {
  background: linear-gradient(to right, var(--primary-color), #3a0c72);
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(33, 1, 74, 0.3);
}

.btn-favorite {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--p-color);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-favorite:hover {
  color: var(--secondary-color);
  transform: scale(1.2);
}

/* Level Badges */
.level-badge {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 12px;
  color: white;
  font-weight: 600;
  display: inline-block;
  margin-right: 5px;
}

.beginner {
  background-color: var(--beginner-color);
}

.intermediate {
  background-color: var(--intermediate-color);
}

.advanced {
  background-color: var(--advanced-color);
}

/* Category Badges */
.category-badge {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 12px;
  color: white;
  font-weight: 600;
  display: inline-block;
}

.grammar {
  background-color: var(--grammar-color);
}

.vocabulary {
  background-color: var(--vocabulary-color);
}

.speaking {
  background-color: var(--speaking-color);
}

.writing {
  background-color: var(--writing-color);
}

/* Pagination */
.pagination-container {
  margin-top: 40px;
}

.page-link {
  border-radius: 50%;
  margin: 0 5px;
  color: var(--primary-color);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.page-item.active .page-link {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
}

.page-link:hover {
  background-color: var(--section-bg-color);
  color: var(--primary-color);
}

/* Footer Styling */
footer {
  background: linear-gradient(135deg, var(--primary-color), #3a0c72);
  color: var(--white-color);
  padding: 25px 0;
  text-align: center;
}

footer p {
  margin: 0;
  color: var(--white-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .navbar-brand {
    font-size: 1.2rem;
  }

  .navbar-brand img {
    height: 40px;
    width: 40px;
  }

  .main-title {
    font-size: 2rem;
  }

  .doc-card {
    padding: 20px;
  }

  .level-badge,
  .category-badge {
    font-size: 0.7rem;
    padding: 3px 8px;
  }
}