:root {
  --color-bg: #edf2ff;
  --color-surface: #f9fbff;
  --color-text: #151b33;
  --color-muted: #566083;
  --color-border: #c7d2f0;
  --color-brand: #ec4d25;
  --color-brand-rgb: 236, 77, 37;
  --color-accent: #2bcfce;
  --color-accent-rgb: 22, 182, 201;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-level: 0 8px 16px rgba(25, 35, 66, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Rubik", "Segoe UI", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-tap-highlight-color: transparent;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

#app {
  width: 100%;
  max-width: 780px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius-lg) + 4px);
  box-shadow: var(--shadow-level);
  padding: clamp(1rem, 2.6vw, 2rem);
}

.site-header {
  text-align: center;
  padding-bottom: 0.95rem;
  margin-bottom: 1.2rem;
  border-bottom: 1px dashed var(--color-border);
}

.site-title {
  display: inline-block;
  font-family: "Monoton", "Rubik", sans-serif;
  font-size: clamp(2.1rem, 5vw, 3rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--color-brand);
  text-decoration: none;
}

.site-title:hover {
  opacity: 0.9;
}

.site-subtitle {
  margin-top: 0.45rem;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-muted);
}

#main-view {
  padding: 0.25rem 0.15rem;
}

.main-lead {
  max-width: 62ch;
  margin-bottom: 1.2rem;
  color: var(--color-muted);
  font-size: 1rem;
  line-height: 1.6;
}

.main-actions {
  margin-bottom: 1.4rem;
}

.example-quizzes {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-level);
  background: var(--color-surface);
  padding: 1rem;
}

.main-muted {
  margin-bottom: 0.8rem;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.example-quiz-list {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.example-quiz-link {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: 0.62rem 0.78rem;
  font-weight: 500;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.example-quiz-link:hover {
  border-color: var(--color-brand);
  background: rgba(var(--color-brand-rgb), 0.08);
}

.hidden {
  display: none !important;
}

h1,
h2,
h3 {
  font-family: "Fraunces", "Rubik", serif;
  color: var(--color-text);
  letter-spacing: 0.03em;
}

h1 {
  font-size: clamp(1.95rem, 3vw, 2.35rem);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.35rem, 2.1vw, 1.6rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.15rem;
}

.btn {
  padding: 0.65rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-brand);
  color: #fff;
  box-shadow: var(--shadow-level);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  box-shadow: var(--shadow-level);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--color-text);
}

input[type="checkbox"],
input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 1.1rem;
  height: 1.1rem;
  border: 1.5px solid var(--color-border);
  border-radius: 0.3rem;
  background: var(--color-surface);
  display: inline-grid;
  place-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease,
    transform 0.12s ease;
}

input[type="radio"] {
  border-radius: 50%;
}

input[type="checkbox"]::before,
input[type="radio"]::before {
  content: "";
}

input[type="checkbox"]::before {
  width: 0.3rem;
  height: 0.55rem;
  border: solid #fff;
  border-width: 0 0.13rem 0.13rem 0;
  margin-bottom: 0.05rem;
  transform: rotate(45deg) scale(0);
  transition: transform 0.12s ease;
}

input[type="radio"]::before {
  width: 0.44rem;
  height: 0.44rem;
  border-radius: 50%;
  background: #fff;
  transform: scale(0);
  transition: transform 0.12s ease;
}

input[type="checkbox"]:hover,
input[type="radio"]:hover {
  border-color: var(--color-brand);
  transform: translateY(-1px);
}

input[type="checkbox"]:checked,
input[type="radio"]:checked {
  border-color: var(--color-brand);
  background: var(--color-brand);
}

input[type="checkbox"]:checked::before {
  transform: rotate(45deg) scale(1);
}

input[type="radio"]:checked::before {
  transform: scale(1);
}

input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--color-brand-rgb), 0.24);
}

input[type="text"],
input[type="url"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.62rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="url"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px rgba(var(--color-brand-rgb), 0.2);
  outline: none;
}

textarea {
  resize: vertical;
  min-height: 66px;
}

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
  padding-right: 2.2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ff4f87'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-position: right 0.65rem center;
  background-size: 1.1rem 1.1rem;
  background-repeat: no-repeat;
}

select:hover {
  border-color: var(--color-brand);
}

.question-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-level);
  padding: 1.2rem;
  margin-bottom: 1rem;
  position: relative;
}

.question-card h3 {
  margin-bottom: 0.75rem;
  color: var(--color-brand);
}

.question-card .form-group {
  margin-bottom: 0.78rem;
}

.question-card .form-group label {
  font-size: 0.92rem;
}

.remove-question-btn {
  position: absolute;
  top: 0.7rem;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--color-muted);
}

.remove-question-btn:hover {
  color: var(--color-brand);
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
}

.answers-list {
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
}

.option-row,
.answer-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.option-correct-label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.option-correct[type="radio"] {
  width: 1rem;
  height: 1rem;
}

.option-row input[type="text"],
.answer-row input[type="text"],
.answer-row input[type="number"] {
  flex: 1;
}

.option-row button,
.answer-row button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted);
  font-size: 1.15rem;
}

.option-row button:hover,
.answer-row button:hover {
  color: var(--color-brand);
}

.add-option-btn,
.add-answer-btn {
  background: var(--color-surface);
  border: 1px dashed var(--color-brand);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-brand);
  margin-top: 0.42rem;
}

.add-option-btn:hover,
.add-answer-btn:hover {
  background: rgba(var(--color-brand-rgb), 0.12);
}

#add-question-btn {
  width: 100%;
  margin-bottom: 1.45rem;
}

.actions {
  margin-bottom: 1.5rem;
}

#link-output {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-level);
  padding: 1.25rem;
}

#link-output h2 {
  margin-bottom: 0.8rem;
  color: var(--color-brand);
}

.link-message {
  border-radius: var(--radius-md);
  padding: 0.65rem 0.8rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.link-message.error {
  background: rgba(var(--color-brand-rgb), 0.16);
  border: 1px solid rgba(var(--color-brand-rgb), 0.32);
  color: var(--color-brand);
}

#quiz-link {
  margin-bottom: 0.55rem;
}

#quiz-start,
#quiz-question,
#quiz-results {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-level);
}

#quiz-start {
  text-align: center;
  padding: 2.8rem 1.1rem;
}

#quiz-question {
  padding: 1.15rem;
}

.progress-bar {
  width: fit-content;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(var(--color-accent-rgb), 0.15);
  color: var(--color-accent);
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

#question-text {
  margin-bottom: 1.15rem;
}

#question-image {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: 0.35rem;
}

.question-image-attribution {
  margin-bottom: 1.15rem;
  font-size: 0.86rem;
  color: var(--color-muted);
  font-weight: 500;
}

#answer-area {
  margin-bottom: 1rem;
}

.question-instruction {
  margin-bottom: 0.68rem;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(var(--color-accent-rgb), 0.32);
  background: rgba(var(--color-accent-rgb), 0.12);
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 600;
}

#answer-area .mc-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.68rem 0.95rem;
  margin-bottom: 0.48rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s ease, background-color 0.15s ease;
}

#answer-area .mc-option:hover {
  transform: translateX(2px);
  border-color: var(--color-brand);
}

#answer-area .mc-option.selected {
  border-color: var(--color-brand);
  background: rgba(var(--color-brand-rgb), 0.14);
}

#feedback {
  border-radius: var(--radius-md);
  padding: 0.75rem 0.95rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

#feedback.correct {
  background: rgba(var(--color-accent-rgb), 0.14);
  color: var(--color-accent);
  border: 1px solid rgba(var(--color-accent-rgb), 0.35);
}

#feedback.incorrect {
  background: rgba(var(--color-brand-rgb), 0.16);
  color: var(--color-brand);
  border: 1px solid rgba(var(--color-brand-rgb), 0.34);
}

#quiz-results {
  text-align: center;
  padding: 2rem 1.05rem;
}

#score-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: 1.4rem;
}

#results-breakdown {
  text-align: left;
  margin-bottom: 1.45rem;
}

.result-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.78rem 0.9rem;
  margin-bottom: 0.55rem;
}

.result-item.correct {
  border-left: 4px solid var(--color-accent);
}

.result-item.incorrect {
  border-left: 4px solid var(--color-brand);
}

.result-item .result-question {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.result-item .result-answer {
  font-size: 0.92rem;
  color: var(--color-muted);
}

#create-new-link {
  text-decoration: none;
  display: inline-block;
  margin-left: 0.5rem;
}

#restart-btn {
  margin-right: 0.5rem;
}

@media (max-width: 720px) {
  body {
    padding: 1rem 0.7rem;
  }

  #app {
    padding: 1rem;
  }

  .option-row,
  .answer-row {
    flex-wrap: wrap;
  }

  .option-row button,
  .answer-row button {
    margin-left: auto;
  }

  #restart-btn,
  #create-new-link {
    width: 100%;
    margin: 0.3rem 0 0;
  }
}