:root {
    --bg-dark-main: #1e2127;
    --bg-dark-container: #2c313a;
    --bg-dark-element: #353b45;
    --text-light: #d1d8e0;
    --text-medium: #abb2bf;
    --accent-teal: #56c9b1;
    --accent-green: #98c379;
    --accent-red: #e06c75;
    --border-color: #444c56;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-dark-main);
    color: var(--text-light);
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

#main-title {
    font-size: 2.2em;
    color: var(--accent-teal);
    margin-top: 20px;
    margin-bottom: 40px;
    text-align: center;
}

#quiz-container, #score-container-wrapper { 
    background-color: var(--bg-dark-container);
    padding: 25px 30px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 650px;
    margin-bottom: 20px; 
}
 #quiz-container {
     position: relative; 
 }


#quiz-header {
    display: flex;
    align-items: center;
    font-size: 1.3em;
    color: var(--accent-teal);
    padding-bottom: 15px;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

#quiz-header-icon {
    margin-right: 10px;
    font-size: 0.9em;
    line-height: 1;
}

#question-counter {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 0.95em;
    color: var(--text-medium);
}

#question-context {
    margin-bottom: 25px;
}

#question-number-display {
    display: block;
    font-size: 1.1em;
    color: var(--accent-teal);
    margin-bottom: 8px;
    font-weight: 600;
}

#question-text {
    font-size: 1.25em;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text-light);
    white-space: pre-wrap;
}

.option-btn, .option-checkbox-container {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 15px;
    margin-bottom: 12px;
    background-color: var(--bg-dark-element);
    color: var(--text-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    font-size: 1em;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}
.option-checkbox-container { padding: 12px 15px; }


.option-letter {
    color: var(--accent-teal);
    font-weight: 600;
    margin-right: 15px;
    min-width: 20px;
    text-align: center;
}

.option-text {
    flex-grow: 1;
}

.option-btn:hover:not(.disabled),
.option-checkbox-container:hover:not(.disabled) {
    background-color: #434a58;
    border-color: var(--accent-teal);
}

.option-btn.selected:not(.correct):not(.incorrect) {
    background-color: #4a5263;
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 2px var(--accent-teal);
}

.option-checkbox-container input[type="checkbox"] {
    margin-right: 15px;
    min-width: 18px;
    height: 18px;
    accent-color: var(--accent-teal);
    cursor: pointer;
}
 .option-checkbox-container input[type="checkbox"]:disabled {
    cursor: not-allowed;
 }
.option-checkbox-container label {
    color: var(--text-light);
    flex-grow: 1;
    cursor: pointer;
    font-size: 1em;
}

.option-btn.disabled,
.option-checkbox-container.disabled {
    cursor: not-allowed;
    opacity: 0.7;
}
.option-checkbox-container.disabled input[type="checkbox"]{
    opacity: 0.7;
}

.option-btn.correct,
.option-checkbox-container.correct {
    background-color: var(--accent-green);
    color: var(--bg-dark-main);
    border-color: var(--accent-green);
    font-weight: 600;
}
.option-btn.correct .option-letter,
.option-checkbox-container.correct label {
    color: var(--bg-dark-main);
}

.option-btn.incorrect,
.option-checkbox-container.incorrect {
    background-color: var(--accent-red);
    color: var(--bg-dark-main);
    border-color: var(--accent-red);
    font-weight: 600;
}
.option-btn.incorrect .option-letter,
.option-checkbox-container.incorrect label {
     color: var(--bg-dark-main);
}

#action-buttons-container {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.action-btn {
    flex-grow: 1;
    padding: 14px 20px;
    background-color: var(--bg-dark-element);
    color: var(--text-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    text-align: center;
}
.action-btn:first-child { margin-right: 10px; }
.action-btn:last-child { margin-left: 10px; }

.action-btn:hover:not(:disabled) {
    background-color: #434a58;
    color: var(--text-light);
    border-color: var(--text-medium);
}
.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#submit-btn.is-next-question {
    background-color: var(--accent-teal);
    color: var(--bg-dark-main);
    border-color: var(--accent-teal);
    font-weight: 600;
}
#submit-btn.is-next-question:hover:not(:disabled) {
    background-color: #4cc0a8;
}

#explanation-area {
    margin-top: 25px;
    padding: 20px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-dark-element);
    border-radius: 8px;
}
#explanation-area h4 { margin-top: 0; margin-bottom: 10px; color: var(--accent-teal); font-size: 1.1em; }
#explanation-text { font-size: 1em; line-height: 1.6; color: var(--text-medium); }

#score-container { text-align: center; padding-top:0; }
#score-container h2 { margin-bottom: 15px; color: var(--text-light); font-size: 1.8em; }
#score-text { font-size: 1.2em; margin-bottom: 30px; line-height: 1.6; }
.pass { color: var(--accent-green); font-weight: bold; }
.fail { color: var(--accent-red); font-weight: bold; }
#reset-quiz-btn-score-screen { margin-top: 20px; }

#domain-feedback-container {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}
#domain-feedback-container h3 {
    color: var(--accent-teal);
    margin-bottom: 15px;
    font-size: 1.4em;
}
.domain-result {
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--bg-dark-element);
    border-radius: 6px;
    border-left: 4px solid var(--accent-teal);
}
.domain-result h4 {
    margin-top: 0;
    margin-bottom: 8px;
    color: var(--text-light);
    font-size: 1.2em;
}
.domain-result p {
    margin-bottom: 5px;
    font-size: 1em;
}
.domain-result ul {
    list-style-type: disc;
    margin-left: 20px;
    padding-left: 0;
    font-size: 0.95em;
}
.domain-result li {
    margin-bottom: 5px;
    color: var(--text-medium);
}
 .domain-score.strong { color: var(--accent-green); }
 .domain-score.weak   { color: var(--accent-red); }