body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(to bottom, #f8f9fa, #e0e6ed);
  color: #333;
  font-size: 1.6rem;
  margin: 0;
}

.header-section {
  display: flex;
  align-items: end;
  padding: 1vw 3vw;
  position: relative;
  color: #333;
  box-shadow: rgba(50, 50, 93, 0.25) 0px 6px 12px -2px, rgba(0, 0, 0, 0.3) 0px 3px 7px -3px;
  justify-content: space-between;
}

.error-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.error-popup-content {
  background-color: #fff;
  padding: 2vw;
  border-radius: 0.5vw;
  box-shadow: 0 0.4vw 0.8vw rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 40vw;
  width: 80%;
  border: 10px solid var(--main-accent-color);
}

  .error-popup-content p {
    font-size: 1.4vw;
    color: #dc3545;
    margin-bottom: 1vw;
  }

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: rgb(35 34 32 / 43%);
}

  .app-container::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -1;
  }

.input-box {
  padding: 15px;
  width: 400px;
  font-size: 1.6rem;
  border: none;
  border-radius: 8px;
  box-shadow: 0 0.2vw 0.5vw rgba(0, 0, 0, 0.1);
}

  .input-box:focus-visible {
    outline: 2px solid #5d5959;
  }

.full-content {
  display: flex;
  padding: 10px;
  box-sizing: border-box;
  margin-top: 1vw;
}

.questions-container {
  position: relative;
  max-height: 100%;
  overflow: hidden;
  margin: 1vw;
  box-sizing: border-box;
  background-color: #f9f9f9;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  background: #e3f2fd;
  padding: 1vw 1vw 1vw 2vw;
  width: 100%;
  box-shadow: 0 .4vw 1vw rgba(0, 0, 0, .1);
  border: 9px solid var(--main-accent-color);
}

.quesHintbtn {
  display: flex;
  justify-content: space-between;
}

.question-item {
  margin-bottom: 8px;
  word-wrap: break-word;
  display: flex;
  gap: 15px;
  align-items: flex-start;
}

.question-wrapper ul {
  display: flex;
  flex-direction: column;
}

.answer-input {
  margin-left: 5px;
  width: auto;
  max-width: 100%;
  padding: 5px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.section-title {
  font-size: 2.5rem;
  color: #4ca1af;
  font-family: 'Open Sans', sans-serif;
}

.questions-list {
  list-style: none;
  padding: 0;
  margin: 1.4vw;
}

.question-wrapper {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.question-text {
  font-size: 1.3vw;
  font-family: 'Roboto', sans-serif;
  line-height: 1.5;
}

.answer-input {
  width: 100%;
  max-width: 203px;
  border: 1px solid #999;
  border-radius: 8px;
  font-family: "Roboto", sans-serif;
  font-size: 1.6rem;
  color: #333;
  position: relative;
  border-radius: .5vw;
  text-align: center;
  vertical-align: text-bottom;
  margin: 0 .15vw;
  display: -ms-inline-flexbox;
  -ms-flex-pack: center;
  justify-content: center;
  -ms-flex-align: center;
  align-items: center;
  padding-bottom: .85vw;
  box-shadow: 0 .05vw 0 .07vw #dfdfdf;
  padding: 0.3vw 0;
}

  .answer-input:focus {
    border-color: #5c67f2;
    outline: none;
  }

  .answer-input::placeholder {
    font-family: 'Roboto', sans-serif;
    color: #aaa;
    font-style: italic;
  }

.submit-container {
  position: relative;
  right: 6vw;
  display: flex;
  justify-content: flex-end;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.warning-label {
  color: red;
  text-align: center;
  font-size: 1.5em;
  margin-top: 10px;
  display: block;
  width: 100%;
}

.congratulation-message {
  text-align: center;
  margin: 50px auto;
  padding: 40px;
  background: white;
  border-radius: 15px;
  width: 66vw;
  height: 50vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: 'Pacifico', cursive;
  position: relative;
  z-index: 1;
  box-shadow: 0 .4vw 1vw rgba(0, 0, 0, .1);
  border: 9px solid var(--main-accent-color);
}

  .congratulation-message h2 {
    color: #4ca1af;
    margin-bottom: 15px;
    font-size: 2.5vw;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
  }

@media (max-width: 768px) {
  .congratulation-message h2 {
    font-size: 2vw;
  }
}

@media (max-width: 480px) {
  .congratulation-message h2 {
    font-size: 3vw;
  }
}

.congratulation-message p {
  color: #333;
  margin-bottom: 20px;
  font-size: 1.8vw;
}

.side-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 50%;
  height: 100%;
  background-color: #ffffff;
  box-shadow: -4px 0 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  box-sizing: border-box;
  overflow-y: auto;
  transition: right 0.3s ease;
  z-index: 999;
}

  .side-menu.active {
    right: 0;
  }

.side-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

  .side-menu-header h3 {
    font-size: 1.5rem;
    color: #4ca1af;
  }

  .side-menu-header .close-btn {
    background-color: #ff5c5c;
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    width: 30px;
    height: 30px;
    cursor: pointer;
  }

.side-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: "Open Sans", sans-serif;
}

.side-menu li {
  font-size: 1vw;
  color: #333;
  margin-bottom: 10px;
  text-align: justify;
}

@keyframes glow {
  0% {
    box-shadow: 0 0 10px #ff5c5c;
  }

  50% {
    box-shadow: 0 0 20px #ff5c5c;
  }

  100% {
    box-shadow: 0 0 10px #ff5c5c;
  }
}

@media (max-width: 1366px) {
  body {
    font-size: 1.4rem;
  }

  .header-section {
    padding: 8px 15px;
  }

  .logo-container {
    width: 10vw;
  }

  .back-button {
    font-size: 14px;
    right: 1vw;
    top: 3vw;
  }

  .input-box {
    width: 250px;
    font-size: 1.4rem;
  }

  .btn-generate, .reset-btn {
    padding: 10px 20px;
    font-size: 1.4rem;
  }

  .current-level {
    font-size: 1rem;
    padding: 8px 10px;
    margin: 15px 15px 0;
  }

  .question-text {
    font-size: 1rem;
  }

  .answer-input {
    width: 80%;
    font-size: 1.4rem;
    padding: 5px;
  }

  .side-menu {
    width: 40%;
  }

  .congratulation-message {
    padding: 30px;
    width: 60vw;
    height: 45vh;
  }

    .congratulation-message h2 {
      color: #4ca1af;
      margin-bottom: 15px;
      font-size: 2.5vw;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      text-align: center;
    }

  @media (max-width: 768px) {
    .congratulation-message h2 {
      font-size: 2vw;
    }
  }

  @media (max-width: 480px) {
    .congratulation-message h2 {
      font-size: 3vw;
    }
  }

  .congratulation-message p {
    font-size: 1.4rem;
  }

  .congratulation-message button {
    padding: 15px 30px;
    font-size: 1.4rem;
  }
}

h3 {
  font-weight: bold;
}

.topic-input[readonly] {
  color: #999 !important;
  opacity: 1 !important;
  background-color: white !important;
  border: 1px solid #ccc !important;
  cursor: not-allowed;
}

@keyframes hint-zoom {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.2);
  }

  100% {
    transform: scale(1);
  }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  font-family: 'Comic Sans MS', cursive, sans-serif;
  text-align: center;
  overflow: hidden;
}

.loader {
  font-size: 15px;
  width: 1.5em;
  height: 1.5em;
  border-radius: 50%;
  position: relative;
  text-indent: -9999em;
  animation: mulShdSpin 1.1s infinite ease;
  transform: translateZ(0);
}

@keyframes mulShdSpin {
  0%, 100% {
    box-shadow: 0em -3em 0em 0em #808080, 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2), 3em 0em 0 0em rgba(128, 128, 128, 0.2), 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), 0em 3em 0 0em rgba(128, 128, 128, 0.2), -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), -3em 0em 0 0em rgba(128, 128, 128, 0.5), -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.7);
  }

  12.5% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.7), 2.2em -2.2em 0 0em #808080, 3em 0em 0 0em rgba(128, 128, 128, 0.2), 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), 0em 3em 0 0em rgba(128, 128, 128, 0.2), -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), -3em 0em 0 0em rgba(128, 128, 128, 0.2), -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.5);
  }

  25% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.5), 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.7), 3em 0em 0 0em #808080, 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), 0em 3em 0 0em rgba(128, 128, 128, 0.2), -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), -3em 0em 0 0em rgba(128, 128, 128, 0.2), -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2);
  }

  37.5% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.2), 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.5), 3em 0em 0 0em rgba(128, 128, 128, 0.7), 2.2em 2.2em 0 0em #808080, 0em 3em 0 0em rgba(128, 128, 128, 0.2), -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), -3em 0em 0 0em rgba(128, 128, 128, 0.2), -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2);
  }

  50% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.2), 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2), 3em 0em 0 0em rgba(128, 128, 128, 0.5), 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.7), 0em 3em 0 0em #808080, -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), -3em 0em 0 0em rgba(128, 128, 128, 0.2), -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2);
  }

  62.5% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.2), 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2), 3em 0em 0 0em rgba(128, 128, 128, 0.2), 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.5), 0em 3em 0 0em rgba(128, 128, 128, 0.7), -2.2em 2.2em 0 0em #808080, -3em 0em 0 0em rgba(128, 128, 128, 0.2), -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2);
  }

  75% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.2), 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2), 3em 0em 0 0em rgba(128, 128, 128, 0.2), 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), 0em 3em 0 0em rgba(128, 128, 128, 0.5), -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.7), -3em 0em 0 0em #808080, -2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2);
  }

  87.5% {
    box-shadow: 0em -3em 0em 0em rgba(128, 128, 128, 0.2), 2.2em -2.2em 0 0em rgba(128, 128, 128, 0.2), 3em 0em 0 0em rgba(128, 128, 128, 0.2), 2.2em 2.2em 0 0em rgba(128, 128, 128, 0.2), 0em 3em 0 0em rgba(128, 128, 128, 0.2), -2.2em 2.2em 0 0em rgba(128, 128, 128, 0.5), -3em 0em 0 0em rgba(128, 128, 128, 0.7), -2.2em -2.2em 0 0em #808080;
  }
}

.suggestions-container {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  max-width: 400px;
  background: white;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  z-index: 10;
  overflow: hidden;
  margin-top: 0px;
}

.suggestions-list {
  display: flex;
  flex-direction: column;
  padding: 0px;
}

.suggestion-item {
  padding: 10px 15px;
  font-size: 1.4rem;
  color: #333;
  cursor: pointer;
  transition: background 0.3s ease;
  border-bottom: 1px solid #ddd;
}

  .suggestion-item:last-child {
    border-bottom: none;
  }

  .suggestion-item:hover {
    background: #f0f0f0;
    font-weight: bold;
  }

.answer-slot {
  display: inline-block;
  margin: 0 0.25vw;
  vertical-align: middle;
}


.input-section {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
}


.button-group {
  display: flex;
  gap: 0.5vw;
  flex: 1;
  justify-content: flex-start;
}

.correct-answer {
  color: green !important;
}

.wrong-answer {
  color: red !important;
}

.default {
  color: black !important;
}

.answer-input:focus {
  outline: none;
}

.wrong-answer-removed {
  background-color: white;
  color: #333;
  border: 1px solid #ccc;
  transition: background-color 2s ease-out;
}

.difficulty-container {
  position: relative;
  width: 100%;
  max-width: 600px;
  height: 20px;
  background: #e0e0e0;
  border-radius: 50px;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, #4ca1af, #6ac5cb);
  border-radius: 50px;
  transition: width 0.6s ease-in-out;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

.level-dots {
  position: absolute;
  width: 100%;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 8px;
}

.level-dot {
  width: 17px;
  height: 17px;
  background: white;
  border: 2px solid #fff;
  border-radius: 50%;
  position: relative;
  transition: transform 0.3s ease;
}

  .level-dot.active {
    background: #356fdc;
    transform: scale(1.3);
  }

.level-tooltip {
  position: absolute;
  bottom: 150%;
  left: 50%;
  transform: translateX(-50%);
  background-color: #4ca1af;
  color: white;
  font-size: 1vw;
  font-weight: bold;
  padding: 4px 8px;
  border-radius: 6px;
  white-space: nowrap;
  box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.2);
  opacity: 1;
}

  .level-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px;
    border-style: solid;
    border-color: #4ca1af transparent transparent transparent;
  }

@media (max-width: 480px) {
  .level-tooltip {
    font-size: 0.65rem;
    padding: 3px 6px;
  }

    .level-tooltip::after {
      border-width: 5px;
    }
}

.hint-anchor {
  position: fixed;
  top: 15.6vw;
  right: 3vw;
  z-index: 1101;
}

.hint-toggle-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 0;
  background: radial-gradient(120% 120% at 30% 20%, #18788f 0%, #006780 70%);
  color: #fff;
  font-weight: 800;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0,0,0,.18);
  display: grid;
  place-items: center;
  transition: transform .18s ease, box-shadow .18s ease;
}

  .hint-toggle-btn:hover {
    transform: translateY(-1px) scale(1.04);
    box-shadow: 0 12px 28px rgba(0,0,0,.22);
  }

  .hint-toggle-btn:focus-visible {
    outline: 3px solid rgba(0,103,128,.35);
    outline-offset: 3px;
  }

.hint-popover {
  position: absolute;
  top: 11vw;
  right: calc(100% + 35px);
  transform: translateY(-46%);
  width: min(51vw, 96vw);
  max-height: 67vh;
  background: #fff;
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, .25);
  border: 10px solid var(--main-accent-color);
  overflow-y: auto;
}

  .hint-popover::before {
    content: "";
    position: absolute;
    top: 50%;
    right: -8px;
    width: 14px;
    height: 14px;
    background: #fff;
    transform: translateY(-50%) rotate(45deg);
    box-shadow: 2px -2px 8px rgba(0,0,0,.08);
  }

.user-guide-close-icon {
  top: 8px;
  right: 10px;
}

.hint-title {
  margin: 0 0 8px;
  font-size: 18px;
}

.hint-list {
  margin: 0;
  padding-left: 1rem;
}

.hint-item {
  margin-bottom: .5rem;
}

.hint-backdrop {
  position: fixed;
  inset: 0;
  background: transparent;
  z-index: 1100;
}

@keyframes hint-slide-in {
  from {
    transform: translateY(-50%) translateX(8px);
    opacity: .0;
  }

  to {
    transform: translateY(-50%) translateX(0);
    opacity: 1;
  }
}

@media (max-width: 640px) {
  .hint-anchor {
    right: 12px;
    bottom: 80px;
    top: auto;
  }

  .hint-popover {
    right: 0;
    bottom: calc(100% + 10px);
    top: auto;
    transform: none;
    width: min(94vw, 380px);
  }

    .hint-popover::before {
      right: 12px;
      top: auto;
      bottom: -7px;
      transform: rotate(45deg);
    }
}

.ring {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 0 auto 8px;
}

.ring-svg {
  width: 220px;
  height: 220px;
  display: block;
}

.ring-track {
  fill: none;
  stroke: rgba(15, 23, 42, 0.18);
  stroke-width: 16;
}

.ring-progress {
  fill: none;
  stroke: #006780;
  stroke-width: 16;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  transition: stroke-dashoffset 0.1s linear;
}

.ring-number {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 56px;
  color: #0f172a;
}

.global-countdown-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: transparent;
  pointer-events: none;
  z-index: 20;
}

:host ::ng-deep .global-countdown-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: transparent;
  pointer-events: none;
  z-index: 2000;
}

:host ::ng-deep .overlay-card {
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border: 1px solid rgba(15,23,42,0.10);
  border-radius: 16px;
  padding: 18px 22px;
  box-shadow: 0 10px 32px rgba(0,0,0,.18);
  text-align: center;
  pointer-events: none;
}

:host ::ng-deep .ring {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 0 auto 8px;
}

:host ::ng-deep .ring-svg {
  position: relative;
  z-index: 2;
}

:host ::ng-deep .ring::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(15,23,42,.08);
  box-shadow: inset 0 0 0 4px rgba(255,255,255,.9), 0 2px 10px rgba(0,0,0,.08);
  z-index: 1;
}

:host ::ng-deep .ring-number {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 3;
  font-weight: 900;
  font-size: 64px;
  line-height: 1;
  color: #0b1220;
  text-shadow: 0 0 2px #fff, 0 0 8px rgba(255,255,255,.85), 0 2px 8px rgba(0,0,0,.35);
}

:host ::ng-deep .ring-track,
:host ::ng-deep .ring-progress {
  stroke-width: 18px;
}

:host ::ng-deep .caption-pill {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: #0ea5e9 !important;
  color: #ffffff !important;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .2px;
  filter: drop-shadow(0 3px 10px rgba(14,165,233,.25));
}