:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --correct-color: #7ed321;
    --incorrect-color: #d0021b;
    --background-color: #f4f7f9;
    --text-color: #333;
    --light-grey: #e0e0e0;
    --white: #ffffff;
}

body {
    font-family: 'Poppins', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}

.quiz-container {
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    overflow: hidden;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: #777;
}

.progress-bar-container {
    flex-grow: 1;
    height: 10px;
    background-color: var(--light-grey);
    border-radius: 5px;
    margin: 0 20px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--primary-color);
    border-radius: 5px;
    transition: width 0.3s ease-in-out;
}

.timer {
    font-weight: 600;
    color: var(--primary-color);
}

#quiz-main {
    min-height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hidden {
    display: none;
}

/* Écran de bienvenue */
.welcome-screen {
    text-align: center;
}

.welcome-screen h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.welcome-screen p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.btn:hover {
    background-color: #357abd;
    transform: translateY(-2px);
}

/* Écran QCM */
.qcm-screen h2 {
    margin-bottom: 2rem;
    text-align: center;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.option {
    display: block;
    background: var(--background-color);
    border: 2px solid var(--light-grey);
    padding: 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.option:hover {
    border-color: var(--primary-color);
}

.option input {
    margin-right: 10px;
}

.option.selected {
    border-color: var(--primary-color);
    background-color: #e9f2fe;
}

.option.correct {
    border-color: var(--correct-color);
    background-color: #eaf9e0;
}

.option.incorrect {
    border-color: var(--incorrect-color);
    background-color: #fde6e8;
}

/* Écran Drag & Drop */
.drag-drop-screen h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.drag-drop-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.drop-zone, .drag-zone {
    width: 40%;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 10px;
    min-height: 250px;
}

.drag-item {
    padding: 10px;
    background: var(--white);
    border: 1px solid var(--light-grey);
    border-radius: 5px;
    margin-bottom: 10px;
    cursor: grab;
}

.drag-item.dragging {
    opacity: 0.5;
}

.drop-target {
    padding: 10px;
    border: 2px dashed var(--light-grey);
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 40px;
}
.drop-target.drag-over {
    background-color: #e9f2fe;
    border-color: var(--primary-color);
}

.arrow-separator {
    font-size: 3rem;
    color: var(--primary-color);
}

/* Écran des résultats */
.results-screen {
    text-align: center;
}

.results-screen h1 {
    color: var(--primary-color);
}
.results-table {
    width: 100%;
    margin-top: 2rem;
    border-collapse: collapse;
}

.results-table th, .results-table td {
    border: 1px solid var(--light-grey);
    padding: 12px;
}

.results-table th {
    background-color: var(--background-color);
}

.result-correct {
    color: var(--correct-color);
    font-weight: bold;
}
.result-incorrect {
    color: var(--incorrect-color);
    font-weight: bold;
}

/* Messages de feedback */
.feedback-message {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    padding: 20px;
}
.feedback-correct {
    color: var(--correct-color);
}
.feedback-incorrect {
    color: var(--incorrect-color);
}