* {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.hidden {
  display: none !important;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: #1e1e3f;
  overflow: hidden;
}

.hover-effect {
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease;
}

.hover-effect:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  cursor: pointer;
}

.disabled-btn {
  opacity: 0.5;
  pointer-events: none;
  box-shadow: none;
  transform: none;
}

.btn {
  font-size: 1.5em;
  font-weight: bold;
  cursor: pointer;
}

.btn-start {
  background-color: #5a52d5;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  color: #ffffff;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: inline-block;
}

.btn-start:hover {
  transform: scale(1.05);
  background-color: #4a42c5;
}

.btn-start:active {
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

.fade-out {
  transition: opacity 0.5s ease;
  opacity: 0;
}

label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
  margin: 0;
  top: 50%;
}

.label-text {
  position: relative;
  display: inline-block;
  padding-left: 50px;
  cursor: pointer;
  transition: color 0.3s ease;
  font-size: 1.2em;
}

.label-text::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1.5em;
  height: 1.5em;
  background-image: url("../../icons/unchecked.png");
  background-size: contain;
  background-repeat: no-repeat;
}

.label-text::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1.5em;
  height: 1.5em;
  opacity: 0;
  background-image: url("../../icons/checked.png");
  background-size: contain;
  background-repeat: no-repeat;
  transition: opacity 0.3s ease;
}

input[type="radio"]:checked + .label-text::after {
  opacity: 1;
}

input[type="radio"]:checked + .label-text::before {
  opacity: 0;
}

.page::-webkit-scrollbar {
  width: 8px;
}

.page::-webkit-scrollbar-track {
  background: #1e1e3f;
}

.page::-webkit-scrollbar-thumb {
  background: #6f6baf;
  border-radius: 10px;
  border: 2px solid #1e1e3f;
}

.page::-webkit-scrollbar-thumb:hover {
  background: #8d86c9;
}

.content-card {
  background-color: #2b2b50;
  width: 850px;
  max-width: 95vw;
  height: 85vh;
  border-radius: 25px;
  padding: clamp(1rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  gap: 1.5rem;
}

.tabs-wrapper {
  display: flex;
  background-color: #16162e;
  margin: 10px;
  border-radius: 12px;
  padding: 5px;
}

.tab-control {
  flex: 1;
  background-color: transparent;
  border: none;
  color: #fbf6e9;
  padding: clamp(8px, 2vw, 12px);
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  opacity: 0.6;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.tab-control.active {
  opacity: 1;
  background-color: #8d86c9;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.card-content-area {
  flex: 1;
  background-color: #1e1e3f;
  border: 1px solid rgba(141, 134, 201, 0.3);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.card-title {
  font-size: 1.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #fbf6e9;
  text-align: center;
}

.no-results-placeholder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  width: 100%;

  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.no-results-placeholder p {
  margin: 0;
}

.error-state-placeholder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 1rem;
  width: 100%;
  background-color: rgba(231, 76, 60, 0.08);
  border: 2px dashed rgba(231, 76, 60, 0.4);
  border-radius: 20px;
  padding: 2rem;
  box-sizing: border-box;
}

.error-state-placeholder .error-icon {
  font-size: 2.5rem;
  filter: grayscale(20%) sepia(20%) hue-rotate(-20deg);
}

.error-state-placeholder p {
  margin: 0;
  color: #f87171;
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.retry-action-btn {
  margin-top: 10px;
  background-color: rgba(231, 76, 60, 0.15);
  border: 1px solid rgba(231, 76, 60, 0.5);
  color: #f87171;
  padding: 10px 24px;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s ease;
}

.retry-action-btn:hover {
  background-color: #e74c3c;
  color: #fbf6e9;
  box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.action-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  opacity: 1;
  transition: transform 0.2s ease;
}
.action-btn img {
  width: 22px;
  height: 22px;
  filter: brightness(0) invert(1);
  transition: all 0.2s ease;
}
.action-btn:hover {
  transform: scale(1.1);
}

.start-selected-quiz-btn {
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #6f6baf;
  color: #fff;
  border: none;
  border-radius: 15px;
  font-size: 1.1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition:
    background-color 0.25s ease,
    box-shadow 0.25s ease;
}
.start-selected-quiz-btn:hover {
  background-color: #5b57a3;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}