/**
 * ================================================================
 * Treasure Hunt - Chasse au trésor (Mobile-First v3.26.0)
 * ================================================================
 *
 * Chasse au trésor par énigmes avec indices progressifs et classement
 * Architecture mobile-first avec breakpoints progressifs
 *
 * @version 3.26.0
 */

/* ================================================================
   1. CSS VARIABLES
   ================================================================ */
:root {
    --cal-primary: #667eea; /* v3.9.4 - Fallback simplifié */
    --cal-secondary: #764ba2; /* v3.9.4 - Fallback simplifié */
    --cal-white: #FFFFFF;
    --cal-text: #1e293b;
    --cal-text-muted: #64748b;

    --treasure-primary: #f59e0b;
    --treasure-secondary: #d97706;
    --treasure-gradient: linear-gradient(135deg, var(--treasure-primary) 0%, var(--treasure-secondary) 100%);
    --treasure-light: #fef3c7;
    --treasure-medium: #fde68a;
    --treasure-dark: #92400e;
    --treasure-darker: #78350f;
    --treasure-success: #10b981;
    --treasure-success-bg: #d1fae5;
    --treasure-success-border: #065f46;
    --treasure-error: #ef4444;
    --treasure-error-bg: #fee2e2;
    --treasure-error-border: #991b1b;
    --treasure-bg: #f8fafc;
    --treasure-border: #e2e8f0;

    --cal-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --cal-font-size-sm: 14px;
    --cal-font-size-base: 16px;
    --cal-font-size-lg: 18px;
    --cal-font-size-xl: 24px;
    --cal-font-size-2xl: 32px;

    --cal-spacing-xs: 8px;
    --cal-spacing-sm: 10px;
    --cal-spacing-md: 15px;
    --cal-spacing-lg: 20px;
    --cal-spacing-xl: 30px;
    --cal-spacing-2xl: 40px;

    --cal-radius-sm: 8px;
    --cal-radius-md: 10px;
    --cal-radius-lg: 15px;
    --cal-radius-xl: 20px;

    --cal-transition-base: 0.3s ease;
    --cal-transition-fast: 0.2s ease;
    --cal-transition-slow: 0.5s ease;
}

/* ================================================================
   2. CONTAINER
   ================================================================ */
.treasure-hunt-activity {
    max-width: 100%;
    margin: 0 auto;
    padding: var(--cal-spacing-md);
    font-family: var(--cal-font-family);
}

@media (min-width: 768px) {
    .treasure-hunt-activity {
        max-width: 800px;
        padding: var(--cal-spacing-lg);
    }
}

/* ================================================================
   3. HEADER
   ================================================================ */
.treasure-header {
    text-align: center;
    margin-bottom: var(--cal-spacing-xl);
}

.treasure-header h2 {
    font-size: var(--cal-font-size-xl);
    margin: 0 0 var(--cal-spacing-sm) 0;
    color: var(--cal-text);
}

@media (min-width: 768px) {
    .treasure-header h2 {
        font-size: var(--cal-font-size-2xl);
    }
}

.treasure-subtitle {
    font-size: var(--cal-font-size-base);
    color: var(--cal-text-muted);
    margin: 0;
}

/* ================================================================
   4. PROGRESS BAR
   ================================================================ */
.treasure-progress-bar {
    position: relative;
    width: 100%;
    height: 40px;
    background: var(--treasure-border);
    border-radius: var(--cal-radius-xl);
    overflow: hidden;
    margin-bottom: var(--cal-spacing-xl);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.progress-fill {
    height: 100%;
    background: var(--treasure-gradient);
    transition: width var(--cal-transition-slow);
    position: relative;
    transform: translate3d(0, 0, 0);
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255,255,255,0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.treasure-hunt-activity .progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 600;
    color: var(--cal-text);
    font-size: var(--cal-font-size-sm);
}

/* ================================================================
   5. COMPLETED STATE
   ================================================================ */
.treasure-completed-state {
    text-align: center;
    padding: var(--cal-spacing-xl);
    background: linear-gradient(135deg, var(--treasure-light) 0%, var(--treasure-medium) 100%);
    border-radius: var(--cal-radius-lg);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

@media (min-width: 768px) {
    .treasure-completed-state {
        padding: var(--cal-spacing-2xl);
    }
}

.completion-icon {
    font-size: var(--cal-font-size-5xl);
    margin-bottom: var(--cal-spacing-lg);
    animation: bounce 1s ease infinite;
}

@media (min-width: 768px) {
    .completion-icon {
        font-size: var(--cal-font-size-5xl);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0) translate3d(0, 0, 0); }
    50% { transform: translateY(-10px) translate3d(0, 0, 0); }
}

.treasure-completed-state h3 {
    font-size: var(--cal-font-size-xl);
    margin: 0 0 var(--cal-spacing-md) 0;
    color: var(--treasure-dark);
}

@media (min-width: 768px) {
    .treasure-completed-state h3 {
        font-size: 28px;
    }
}

.treasure-completed-state > p {
    font-size: var(--cal-font-size-base);
    color: var(--treasure-darker);
    margin-bottom: var(--cal-spacing-xl);
}

.completion-stats {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--cal-spacing-lg);
    margin: var(--cal-spacing-xl) 0;
}

@media (min-width: 768px) {
    .completion-stats {
        flex-direction: row;
        gap: var(--cal-spacing-2xl);
    }
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: bold;
    color: var(--treasure-dark);
    margin-bottom: 5px;
}

@media (min-width: 768px) {
    .stat-value {
        font-size: var(--cal-font-size-2xl);
    }
}

.stat-label {
    font-size: var(--cal-font-size-sm);
    color: var(--treasure-darker);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.completion-date {
    margin-top: var(--cal-spacing-lg);
    padding-top: var(--cal-spacing-lg);
    border-top: 2px solid rgba(146, 64, 14, 0.2);
    font-size: var(--cal-font-size-sm);
    color: var(--treasure-darker);
}

/* ================================================================
   6. GAME STATE
   ================================================================ */
.treasure-game-state {
    background: var(--cal-white);
    border-radius: var(--cal-radius-lg);
    padding: var(--cal-spacing-lg);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

@media (min-width: 768px) {
    .treasure-game-state {
        padding: var(--cal-spacing-xl);
    }
}

.treasure-step-container {
    max-width: 100%;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .treasure-step-container {
        max-width: 600px;
    }
}

.step-number {
    display: inline-block;
    background: var(--treasure-gradient);
    color: var(--cal-white);
    padding: var(--cal-spacing-xs) var(--cal-spacing-lg);
    border-radius: var(--cal-radius-xl);
    font-size: var(--cal-font-size-sm);
    font-weight: 600;
    margin-bottom: var(--cal-spacing-lg);
}

.step-question {
    font-size: var(--cal-font-size-lg);
    line-height: 1.6;
    color: var(--cal-text);
    margin-bottom: var(--cal-spacing-xl);
    padding: var(--cal-spacing-lg);
    background: var(--treasure-bg);
    border-left: 4px solid var(--treasure-primary);
    border-radius: var(--cal-radius-sm);
}

@media (min-width: 768px) {
    .step-question {
        font-size: 20px;
    }
}

/* ================================================================
   7. ANSWER SECTION
   ================================================================ */
.answer-section {
    display: flex;
    flex-direction: column;
    gap: var(--cal-spacing-sm);
    margin-bottom: var(--cal-spacing-lg);
}

@media (min-width: 768px) {
    .answer-section {
        flex-direction: row;
    }
}

.answer-input {
    flex: 1;
    padding: var(--cal-spacing-md);
    font-size: var(--cal-font-size-base);
    border: 2px solid var(--treasure-border);
    border-radius: var(--cal-radius-sm);
    transition: all var(--cal-transition-base);
    min-height: 56px;
}

.answer-input:focus {
    outline: none;
    border-color: var(--treasure-primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.submit-answer-btn {
    padding: var(--cal-spacing-md) var(--cal-spacing-xl);
    font-size: var(--cal-font-size-base);
    font-weight: 600;
    color: var(--cal-white);
    background: var(--treasure-gradient);
    border: none;
    border-radius: var(--cal-radius-sm);
    cursor: pointer;
    transition: all var(--cal-transition-base);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    min-height: 56px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transform: translate3d(0, 0, 0);
}

.submit-answer-btn:hover {
    transform: translateY(-2px) translate3d(0, 0, 0);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

@media (hover: none) {
    .submit-answer-btn:active {
        opacity: 0.85;
        transform: scale(0.98) translate3d(0, 0, 0);
    }
}

.submit-answer-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ================================================================
   8. FEEDBACK
   ================================================================ */
.treasure-feedback {
    padding: var(--cal-spacing-md);
    border-radius: var(--cal-radius-sm);
    margin-bottom: var(--cal-spacing-lg);
    font-weight: 500;
    text-align: center;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px) translate3d(0, 0, 0);
    }
    to {
        opacity: 1;
        transform: translateY(0) translate3d(0, 0, 0);
    }
}

.treasure-feedback.success {
    background: var(--treasure-success-bg);
    color: var(--treasure-success-border);
    border: 2px solid var(--treasure-success);
}

.treasure-feedback.error {
    background: var(--treasure-error-bg);
    color: var(--treasure-error-border);
    border: 2px solid var(--treasure-error);
}

/* ================================================================
   9. ATTEMPTS & HINTS
   ================================================================ */
.attempts-counter {
    text-align: center;
    padding: var(--cal-spacing-sm);
    background: #f1f5f9;
    border-radius: var(--cal-radius-sm);
    font-size: var(--cal-font-size-sm);
    color: #475569;
    margin-bottom: var(--cal-spacing-lg);
}

.attempts-counter span {
    font-weight: bold;
    color: var(--treasure-primary);
}

.hints-section {
    margin-top: var(--cal-spacing-xl);
}

.hint-item {
    display: flex;
    align-items: flex-start;
    gap: var(--cal-spacing-md);
    padding: var(--cal-spacing-md);
    background: var(--treasure-light);
    border: 2px solid #fbbf24;
    border-radius: var(--cal-radius-sm);
    margin-bottom: var(--cal-spacing-sm);
    animation: slideDown 0.5s ease;
}

.hint-icon {
    font-size: var(--cal-font-size-xl);
    flex-shrink: 0;
}

.hint-text {
    font-size: var(--cal-font-size-base);
    color: var(--treasure-darker);
    line-height: 1.5;
}

/* ================================================================
   10. SUCCESS OVERLAY
   ================================================================ */
.treasure-success-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(5px);
    padding: var(--cal-spacing-lg);
}

.treasure-success-content {
    position: relative;
    background: var(--cal-white);
    padding: var(--cal-spacing-xl);
    border-radius: var(--cal-radius-xl);
    text-align: center;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: popIn 0.5s ease;
    transform: translate3d(0, 0, 0);
}

@media (min-width: 768px) {
    .treasure-success-content {
        padding: var(--cal-spacing-2xl);
    }
}

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.8) translate3d(0, 0, 0);
    }
    100% {
        opacity: 1;
        transform: scale(1) translate3d(0, 0, 0);
    }
}

.success-animation {
    position: relative;
    margin-bottom: var(--cal-spacing-lg);
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-animation .treasure-icon {
    font-size: 64px;
    line-height: 1;
    will-change: transform, opacity;
    animation: treasureAppear 0.8s ease-out 0.3s forwards;
    opacity: 0;
}

@media (min-width: 768px) {
    .success-animation .treasure-icon {
        font-size: 80px;
    }
}

@keyframes treasureAppear {
    0% {
        transform: scale(0) rotate(0deg) translate3d(0, 0, 0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2) rotate(180deg) translate3d(0, 0, 0);
        opacity: 1;
    }
    100% {
        transform: scale(1) rotate(360deg) translate3d(0, 0, 0);
        opacity: 1;
    }
}

.success-title {
    font-size: var(--cal-font-size-xl);
    margin: 0 0 var(--cal-spacing-sm) 0;
    color: var(--cal-text);
}

@media (min-width: 768px) {
    .success-title {
        font-size: 28px;
    }
}

.success-message {
    font-size: var(--cal-font-size-base);
    color: var(--cal-text-muted);
    margin-bottom: var(--cal-spacing-xl);
    line-height: 1.6;
}

.success-continue-btn {
    padding: var(--cal-spacing-md) var(--cal-spacing-2xl);
    font-size: var(--cal-font-size-base);
    font-weight: 600;
    color: var(--cal-white);
    background: var(--treasure-gradient);
    border: none;
    border-radius: var(--cal-radius-md);
    cursor: pointer;
    transition: all var(--cal-transition-base);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    min-height: 56px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transform: translate3d(0, 0, 0);
}

.success-continue-btn:hover {
    transform: translateY(-2px) translate3d(0, 0, 0);
    box-shadow: 0 6px 16px rgba(245, 158, 11, 0.5);
}

@media (hover: none) {
    .success-continue-btn:active {
        opacity: 0.85;
        transform: scale(0.98) translate3d(0, 0, 0);
    }
}

/* ================================================================
   11. LEADERBOARD MODAL
   ================================================================ */
.treasure-leaderboard-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: var(--cal-spacing-lg);
    backdrop-filter: blur(5px);
}

.treasure-leaderboard-modal.active {
    display: flex;
}

.treasure-leaderboard-modal-close {
    position: absolute;
    top: var(--cal-spacing-lg);
    right: var(--cal-spacing-lg);
    background: rgba(0, 0, 0, 0.3);
    color: var(--cal-white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: var(--cal-font-size-xl);
    cursor: pointer;
    line-height: 1;
    transition: all var(--cal-transition-base);
    z-index: 10;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.treasure-leaderboard-modal-close:hover {
    background: rgba(0, 0, 0, 0.5);
    transform: scale(1.1) translate3d(0, 0, 0);
}

@media (hover: none) {
    .treasure-leaderboard-modal-close:active {
        opacity: 0.85;
    }
}

.treasure-leaderboard-content {
    background: var(--cal-white);
    border-radius: var(--cal-radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--cal-spacing-xl);
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.treasure-leaderboard-header {
    text-align: center;
    padding-bottom: var(--cal-spacing-lg);
    border-bottom: 2px solid var(--treasure-border);
    margin-bottom: var(--cal-spacing-lg);
}

.treasure-leaderboard-header h2 {
    margin: 0;
    font-size: var(--cal-font-size-xl);
    color: var(--cal-text);
}

.treasure-leaderboard-loader {
    text-align: center;
    padding: var(--cal-spacing-2xl);
}

.loader-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--treasure-border);
    border-top-color: var(--treasure-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.treasure-leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: var(--cal-spacing-sm);
}

.treasure-leaderboard-item {
    display: flex;
    align-items: center;
    gap: var(--cal-spacing-md);
    padding: var(--cal-spacing-md);
    background: var(--treasure-bg);
    border-radius: var(--cal-radius-md);
    transition: all var(--cal-transition-base);
}

.treasure-leaderboard-item:hover {
    background: var(--treasure-border);
    transform: translateX(5px) translate3d(0, 0, 0);
}

.treasure-leaderboard-item.current-user {
    background: linear-gradient(135deg, var(--treasure-light) 0%, var(--treasure-medium) 100%);
    border: 2px solid var(--treasure-primary);
}

.treasure-leaderboard-item .rank {
    font-size: var(--cal-font-size-xl);
    font-weight: bold;
    min-width: 40px;
    text-align: center;
}

.treasure-leaderboard-item .user-info {
    flex: 1;
}

.treasure-leaderboard-item .user-name {
    font-size: var(--cal-font-size-base);
    font-weight: 600;
    color: var(--cal-text);
}

.treasure-leaderboard-item .time {
    font-size: var(--cal-font-size-lg);
    font-weight: bold;
    color: var(--treasure-primary);
}