/**
 * Thème par défaut pour l'expérience (vue participant).
 * Mise en page aérée et professionnelle.
 * Les classes exp-* sont personnalisables via la feuille de style de l'expérience.
 */

/* --- Variables (facilitent les surcharges) --- */
.exp-container {
    --exp-bg: #161616;
    --exp-surface: #1e1e1e;
    --exp-border: rgba(255, 255, 255, 0.08);
    --exp-text: #f0f0f0;
    --exp-text-muted: #a0a0a0;
    --exp-accent: #4a9eff;
    --exp-radius: 10px;
    --exp-space: 1.5rem;
    --exp-space-sm: 0.75rem;
    --exp-space-lg: 2rem;
}

body {
    background-color: #0f0f0f;
    color: #f0f0f0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
}

.exp-container {
    max-width: 720px;
    margin: 2.5rem auto;
    padding: 2.5rem 2.25rem 2.75rem;
    background: var(--exp-surface);
    color: var(--exp-text);
    border-radius: var(--exp-radius);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--exp-border);
    max-height: 90vh;
    overflow-y: auto;
}

@media (min-width: 640px) {
    .exp-container {
        padding: 3rem 2.75rem 3.25rem;
    }
}

/* --- En-tête et titres --- */
.exp-header {
    margin-bottom: var(--exp-space-lg);
    padding-bottom: var(--exp-space);
    border-bottom: 1px solid var(--exp-border);
}

.exp-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    color: var(--exp-text-muted);
    letter-spacing: 0.02em;
}

.exp-page-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 var(--exp-space) 0;
    line-height: 1.35;
    color: var(--exp-text);
}

.exp-instructions {
    color: var(--exp-text-muted);
    margin-bottom: var(--exp-space-lg);
    padding: 0;
    line-height: 1.65;
    white-space: pre-line;
}

/* --- Blocs et questions --- */
.exp-block {
    margin-bottom: var(--exp-space-lg);
}

.exp-block:last-child {
    margin-bottom: 0;
}

.exp-question-label {
    font-weight: 500;
    font-size: 1rem;
    margin-bottom: var(--exp-space-sm);
    display: block;
    color: var(--exp-text);
}

.exp-qcm-block {
    margin-bottom: var(--exp-space-lg);
}

.exp-qcm-block:last-child {
    margin-bottom: 0;
}

/* --- Champs de saisie --- */
.exp-input,
.exp-input[type="text"],
.exp-input[type="number"],
textarea.exp-input {
    width: 100%;
    box-sizing: border-box;
    padding: 0.65rem 0.85rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--exp-text);
    background: var(--exp-bg);
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.exp-input::placeholder,
textarea.exp-input::placeholder {
    color: var(--exp-text-muted);
    opacity: 0.8;
}

.exp-input:focus,
textarea.exp-input:focus {
    outline: none;
    border-color: var(--exp-accent);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.15);
}

textarea.exp-input {
    min-height: 100px;
    resize: vertical;
}

/* --- Choix (QCM, cases, liste) --- */
.exp-choices {
    display: flex;
    flex-direction: column;
    gap: var(--exp-space-sm);
}

.exp-choices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--exp-space-sm);
}

.exp-qcm-btn {
    display: block;
    width: 100%;
    padding: 0.7rem 1rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    color: var(--exp-text);
    background: var(--exp-bg);
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.exp-qcm-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.12);
}

.exp-qcm-btn.selected {
    background: var(--exp-accent);
    border-color: var(--exp-accent);
    color: #0a0a0a;
}

.exp-choice {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    padding: 0.25rem 0;
}

.exp-choice input[type="radio"],
.exp-choice input[type="checkbox"] {
    accent-color: var(--exp-accent);
    width: 1.1em;
    height: 1.1em;
}

/* --- Groupe d'éléments --- */
.exp-groupe-item {
    margin-bottom: var(--exp-space);
}

.exp-groupe-item:last-child {
    margin-bottom: 0;
}

.exp-groupe-item.exp-groupe-item-hidden {
    display: none;
}

.exp-groupe-nav {
    margin-top: var(--exp-space);
    margin-bottom: var(--exp-space-sm);
}

/* --- Échelle Likert --- */
.exp-likert-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--exp-text-muted);
    margin-bottom: var(--exp-space-sm);
}

.exp-likert-options {
    display: flex;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 0.5rem;
    align-items: center;
    width: 100%;
}

.exp-likert-options .exp-likert-option {
    flex: 0 0 auto;
}

/* --- Sliders --- */
.exp-slider-labels-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--exp-text-muted);
    margin-bottom: var(--exp-space-sm);
}

.exp-slider-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 72px;
    align-items: center;
    gap: var(--exp-space);
}

.exp-multi-slider-group {
    display: grid;
    grid-template-columns: auto 1fr auto;
    column-gap: var(--exp-space);
    row-gap: var(--exp-space-sm);
    align-items: center;
}

.exp-slider-label {
    font-size: 0.95rem;
    margin-bottom: 0.35rem;
    display: block;
    color: var(--exp-text);
}

.exp-slider {
    width: 100%;
    height: 8px;
    accent-color: var(--exp-accent);
}

.exp-slider-value {
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-size: 0.95rem;
    color: var(--exp-text-muted);
}

/* --- Barre de progression --- */
.exp-progress-bar-wrap {
    height: 10px;
    background: var(--exp-bg);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: var(--exp-space-sm);
}

.exp-progress-bar {
    height: 100%;
    background: var(--exp-accent);
    border-radius: 5px;
    transition: width 0.25s ease;
}

.exp-progress-text {
    font-size: 0.9rem;
    color: var(--exp-text-muted);
}

/* --- Titre de section --- */
.exp-section-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin: var(--exp-space-lg) 0 var(--exp-space) 0;
    color: var(--exp-text);
}

/* --- Image --- */
.exp-img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: var(--exp-space) auto;
    border-radius: 8px;
    overflow: hidden;
}

.exp-image-caption {
    font-size: 0.9rem;
    color: var(--exp-text-muted);
    margin-top: var(--exp-space-sm);
    text-align: center;
}

/* --- Fixation / Présentation --- */
.exp-fixation-presentation {
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.exp-fixation-cross {
    font-size: 2.5rem;
    font-weight: 200;
    color: var(--exp-text);
    line-height: 1;
    user-select: none;
}

.exp-fixation-content {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

/* --- Page remerciement --- */
.exp-remerciement-title {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: var(--exp-space);
    color: var(--exp-text);
}

.exp-remerciement-message {
    color: var(--exp-text-muted);
    margin-bottom: var(--exp-space);
    line-height: 1.65;
}

.exp-remerciement-link a {
    color: var(--exp-accent);
    text-decoration: none;
}

.exp-remerciement-link a:hover {
    text-decoration: underline;
}

/* --- Navigation --- */
.exp-nav {
    margin-top: var(--exp-space-lg);
    padding-top: var(--exp-space-lg);
    border-top: 1px solid var(--exp-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--exp-space);
    flex-wrap: wrap;
}

.exp-nav-group {
    display: flex;
    gap: var(--exp-space-sm);
}

/* --- Pied de page --- */
.exp-footer {
    margin-top: var(--exp-space-lg);
    padding-top: var(--exp-space);
    font-size: 0.875rem;
    color: var(--exp-text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--exp-space-sm);
}

/* --- Boutons --- */
.exp-container .btn {
    border-radius: 8px;
    border: none;
    padding: 0.6rem 1.15rem;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease, opacity 0.2s ease;
}

.exp-container .btn-primary {
    background: var(--exp-accent);
    color: #0a0a0a;
}

.exp-container .btn-primary:hover:not(:disabled) {
    filter: brightness(1.1);
}

.exp-container .btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--exp-text);
    border: 1px solid var(--exp-border);
}

.exp-container .btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.12);
}

.exp-container .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}