html {
  --theme-color: rgb(29, 41, 136);
  --theme-color-tr: rgba(25, 36, 119, 0.2);
}

body {
  font-family: "Geologica", sans-serif;
  background: var(--theme-color-tr);
  padding: 0.5rem;
  margin: 0;
}

.no-scroll {
  overflow: hidden;
}

.highlight {
  background: bisque;
  transition: background 1s ease;
}

#search-container {
  display: flex;
  gap: 0.5rem;
  border-radius: 1.3rem;
  align-items: center;
}

#search-container button {
  background-color: var(--theme-color);
  color: white;
  border: none;
  border-radius: 50%;
  line-height: 0;
  padding: 0.8rem;
  cursor: pointer;
}

#search-container button:hover {
  background-color: maroon;
}

#search-container input {
  border-radius: 1.3rem;
  border: 2px solid var(--theme-color);
  padding-inline: 1rem;
  color: var(--theme-color);
  /* min-width: 15rem; */
  /* min-width: 40vw; */
  width: 30%;
  font-size: 1.1rem;
  height: 2.5rem;
}

#search-container input:focus {
  background-color: bisque;
}

/* Progress Sidebar (no mobile changes yet — awaiting your preference) */
#progress-tracker {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 2;
  height: 100dvh;
  width: 100%;
  background: rgb(247, 247, 255);
  padding: 1rem;
  overflow-y: auto;
  box-sizing: border-box; /*needed*/
}

#progress-tracker h2 {
  color: var(--theme-color);
  background-color: transparent;
  border: none;
  margin: 4rem 0 0 0;
  text-shadow: 4px 4px 7px rgba(0, 0, 0, 0.3);
  /* margin: 0; */
}

.progress-list {
  list-style: none;
  padding: 0rem;
  /* margin: 0; */
  width: 70%;
  margin-inline: auto;
  /* background-color: rgba(0, 0, 0, 0.1); */
}
.progress-list li:not(.progress-tracker-label) {
  cursor: pointer;
  padding-block: 0.5rem;
  transition: background 0.2s;
  border-bottom: 1px solid var(--theme-color-tr);
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 2em 1fr;
  justify-items: start;
  align-items: center;
  overflow-x: auto;
  overflow-y: hidden;
}

.number-label {
  justify-self: right;
  text-align: right;
}
.your-answer {
  margin-top: 0.5rem;
  color: var(--theme-color);
  grid-column: 2 / span 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  justify-self: stretch;
  gap: 0.5rem;
}
.correct-answer-text {
  grid-column: 2 / span 1;
}
.correct-answer {
  grid-column: 2 / span 1;
  color: initial;
}

.progress-list li:hover:not(.progress-tracker-label) {
  background: #f0f0f0;
}

.your-answer .fa-solid {
  font-size: x-large;
}

.progress-tracker-label {
  padding: 0.3rem 0.5rem;
  color: white;
  margin-block: 2rem 0.5rem;
  color: var(--theme-color);
  background-color: var(--theme-color-tr);
  text-align: center;
  border-top: 0.1rem solid var(--theme-color);
  border-bottom: 0.1rem solid var(--theme-color);
  text-shadow: 4px 4px 7px rgba(0, 0, 0, 0.3);
  font-weight: 900;
}

.progress-unanswered {
  color: #3e3e3e;
}
.progress-correct,
.fa-circle-check {
  color: #39b73d;
}
.progress-incorrect,
.fa-circle-xmark {
  color: #c8382d;
}

#progress-tracker > nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0; /* instead of width:100% */
  display: flex;
  z-index: 3;
  justify-content: space-between;
  border-bottom: 0.1rem solid var(--theme-color);
  padding: 0.5rem 1rem;
  box-sizing: border-box;
  backdrop-filter: blur(10px);
}

.close-btn {
  background-color: transparent;
  border: none;
  cursor: pointer;
  font-size: 3rem;
  color: var(--theme-color);
  padding: 0;
  line-height: 0;
}

h1 {
  color: var(--theme-color);
  text-align: center;
  font-weight: 900;
  text-shadow: 7px 7px 7px rgba(0, 0, 0, 0.3);
  font-size: clamp(1.4rem, 0.875rem + 2vw, 2.2rem);
  margin-top: 3rem;
}

#contents-container {
  display: flex;
  justify-content: center;
  padding-inline: 2rem;
  background-color: rgba(0, 0, 0, 0.05);
  margin-block: 4rem 6rem;
}

#contents {
  color: var(--theme-color);
  list-style-type: upper-roman;
  padding: 0;
  padding-inline: 1em;
  display: grid;
  gap: 0.5em;
  font-weight: 600;
}

#contents ul {
  list-style-type: none;
  padding: 1rem 0rem 0.5rem 1rem;
  display: grid;
  gap: 0.4em;
}

#contents > li {
  padding-left: 0.5rem;
}

#contents > li > a {
  color: var(--theme-color);
  font-weight: 600;
}

#contents ul > li > a {
  font-size: 1rem;
  color: var(--theme-color);
}

h2 {
  background-color: var(--theme-color);
  color: white;
  text-align: center;
  letter-spacing: 1px;
  padding-block: 0.3em;
  border-top: 0.1rem solid var(--theme-color);
  border-bottom: 0.1rem solid var(--theme-color);
  border-radius: 1.5rem;
  font-size: clamp(1rem, 0.875rem + 2vw, 1.5rem);
}

/* Main quiz area */
.quiz-container {
  margin: 0 auto 6rem auto;
  background: white;
  padding: 1rem 2rem 1rem 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  max-width: 70%;
}

#panel-container {
  background-color: white;
  background-color: transparent;
  padding: 0.5rem 0.5rem 1rem 0.5rem;
  backdrop-filter: blur(40px);
  border: 2px solid var(--theme-color);
  border-radius: 1rem;
  transition: opacity 0.4s ease; /* smooth fade */
  opacity: 0; /* visible initially */
  margin-bottom: 0.5rem;
}

#panel-container.visible {
  opacity: 1;
  pointer-events: none; /* so it's not clickable while hidden */
}

.score-board {
  text-shadow: 4px 4px 7px rgba(0, 0, 0, 0.3);
  color: var(--theme-color);
  font-weight: 900;
  margin-bottom: 1rem;
  text-align: center;
}

#btn-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.btn {
  font-family: "Geologica", sans-serif;
  margin: 0;
  border: none;
  border-radius: 50%;
  background: #f44336;
  color: white;
  cursor: pointer;
  height: 3.5rem;
  aspect-ratio: 1;
  padding: 0;
  font-size: 1.5rem;
}

.btn.secondary {
  background: var(--theme-color);
}

.btn:hover {
  filter: brightness(0.9);
}

#reset {
  margin-left: auto;
}

/* Sections & questions */

.question-block {
  overflow-x: auto;
  overflow-y: hidden;
}

.question {
  margin-bottom: 1rem;
  color: rgb(20, 40, 60);
  font-weight: 300;
}

.q-index {
  display: block;
  margin-block: 1rem;
  color: var(--theme-color);
  font-weight: 800;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--theme-color);
}

.options {
  list-style: none;
  padding: 0;
  /*  */
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1rem;
  align-items: center;
  /*  */
}
.options li {
  margin: 0.5rem 0;
}
.option-btn {
  width: 100%;
  text-align: left;
  padding: 0.6rem 1rem;
  border: 2px solid var(--theme-color-tr);
  border-radius: 0.5rem;
  background: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: inherit;
  font-family: inherit;
}
.option-btn:hover {
  background: #f0f0f0;
}
.option-btn.correct {
  border-color: #4caf50;
  background: #e7f9e7;
}
.option-btn.incorrect {
  border-color: #f44336;
  background: #fde7e7;
}

.feedback {
  margin-top: 0.7rem;
  font-weight: bold;
  display: none;
}
.feedback.correct {
  color: #4caf50;
}
.feedback.incorrect {
  color: #f44336;
}

.explanation {
  margin-bottom: 1rem;
  padding: 0.5rem;
  background: #fff3e0;
  border-left: 0.5rem solid #ff9800;
  display: none;
}

/* hr {
  margin: 25px 0;
  border: none;
  border-top: 1px solid #ddd;
} */

/* Progress Bar */
.progress-bar-container {
  width: 100%;
  background: var(--theme-color-tr);
  border-radius: 0.5rem;
  border: 1px solid var(--theme-color);
}
.progress-bar {
  height: 1.5rem;
  width: 0;
  background: var(--theme-color);
  border-radius: 0.5rem;
  transition: width 0.3s;
}

#float-container {
  position: fixed;
  z-index: 1;
  bottom: 0.5rem;
  left: 0.5rem;
  right: 0.5rem;
}

footer {
  padding: 0.5rem 1rem;
  border: 2px solid var(--theme-color);
  border-radius: 20px;
  z-index: 1;
  backdrop-filter: blur(40px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
}

footer nav {
  display: flex;
  gap: 1.5rem;
}

footer nav a {
  color: var(--theme-color);
  font-size: 2.5rem;
}

footer nav a:hover {
  cursor: pointer;
  color: maroon;
}

@media (width <= 700px) {
  .quiz-container {
    max-width: 100%;
    padding: 1rem 1rem;
  }

  .q-index {
    font-size: smaller;
  }

  .progress-list {
    margin: 0;
    width: 100%;
  }
}

@media (width <= 500px) {
  .btn {
    height: 2rem;
    font-size: 1rem;
  }

  .close-btn {
    font-size: 2rem;
  }

  footer {
    bottom: 0.5rem;
    padding: 0.3rem 0.8rem;
  }

  footer nav {
    gap: 1rem;
  }

  footer nav a {
    font-size: 1.5rem;
  }
}

@media (width<=600px) {
  #search-container input {
    width: 100%;
  }

.options {
  list-style: none;
  padding: 0;
  /*  */
  display: block;
}

  #search-container * {
    font-size: 1.2rem;
  }
}

@media (601px <= width <=899px) {
  #search-container input {
    width: 60%;
  }
}