/**
 * Visual Comparison Test - Styles
 * Dark theme matching Ishihara/Calculation tests
 * Version: 1.0.0
 */

/* ===== GLOBAL VARIABLES ===== */
:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-correct: #27AE60;
    --color-wrong: #E74C3C;
    --color-warning: #F39C12;
    --border-radius: 12px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE ===== */
#visual-comparison-test-container {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
    background: var(--bg-primary);
    color: var(--color-text);
    line-height: 1.6;
}

#visual-comparison-test-container * {
    box-sizing: border-box;
}

/* ===== CARD STYLES ===== */
.test-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
}

/* ===== WELCOME SCREEN ===== */
.test-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary)!important;
    margin: 0 0 var(--spacing-md) 0;
    text-align: center;
}

.test-description {
    font-size: 18px;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.test-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(37, 99, 235, 0.1);
    border-radius: 8px;
}

.info-label {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 14px;
}

.info-value {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 20px;
}

/* ===== BUTTONS ===== */
.primary-btn {
    width: 100%;
    padding: 18px 32px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    background: var(--color-primary);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.primary-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
}

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

.secondary-btn {
    width: 100%;
    padding: 16px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    background: var(--bg-tertiary);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.secondary-btn:hover {
    background: rgba(37, 99, 235, 0.2);
    border-color: var(--color-primary-hover);
}

/* ===== INSTRUCTIONS ===== */
.test-instructions {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
}

.test-instructions h3 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-primary);
    font-size: 18px;
}

.test-instructions ul {
    margin: 0;
    padding-left: 24px;
}

.test-instructions li {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    font-size: 15px;
}

/* ===== PROGRESS BAR ===== */
#progress-container {
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
    border-radius: 100px;
    transition: width 0.4s ease-out;
}

.progress-text {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 14px;
    font-weight: 600;
}

/* ===== TIMER ===== */
#timer-container {
    margin-bottom: var(--spacing-md);
}

.timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.timer-icon {
    font-size: 28px;
}

#timer-container.timer-warning .timer {
    background: rgba(243, 156, 18, 0.2);
    color: var(--color-warning);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ===== QUESTION CARD ===== */
.question-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.question-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
}

/* ===== COMPARISON CONTAINER ===== */
.comparison-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.string-box {
    flex: 1;
    min-width: 250px;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 2px solid rgba(37, 99, 235, 0.3);
    transition: var(--transition);
}

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

.string-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    text-align: center;
}

.string-display {
    font-family: 'Courier New', Courier, monospace;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    text-align: center;
    letter-spacing: 4px;
    padding: var(--spacing-sm) 0;
    word-break: break-all;
}

.vs-separator {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* ===== ANSWER BUTTONS ===== */
.answer-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.answer-btn {
    padding: 24px 20px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    border: 3px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-icon {
    font-size: 32px;
}

.same-btn {
    background: rgba(39, 174, 96, 0.15);
    border-color: rgba(39, 174, 96, 0.3);
}

.same-btn:hover {
    background: rgba(39, 174, 96, 0.25);
    border-color: var(--color-correct);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(39, 174, 96, 0.3);
}

.different-btn {
    background: rgba(231, 76, 60, 0.15);
    border-color: rgba(231, 76, 60, 0.3);
}

.different-btn:hover {
    background: rgba(231, 76, 60, 0.25);
    border-color: var(--color-wrong);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.3);
}

.answer-btn.selected {
    border-width: 4px;
    transform: scale(0.98);
}

.same-btn.selected {
    border-color: var(--color-correct);
    background: rgba(39, 174, 96, 0.35);
}

.different-btn.selected {
    border-color: var(--color-wrong);
    background: rgba(231, 76, 60, 0.35);
}

/* ===== RESULTS SCREEN ===== */
.results-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.results-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-sm);
}

.results-title {
    font-size: 32px;
    font-weight: 700;
    margin: 0;
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid rgba(37, 99, 235, 0.2);
}

.stat-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-percentage {
    display: block;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary-hover);
}

.stat-detail {
    font-size: 14px;
    color: var(--color-text-muted);
}

.correct-text {
    color: var(--color-correct);
    font-weight: 600;
}

.wrong-text {
    color: var(--color-wrong);
    font-weight: 600;
}

/* ===== MESSAGE BOX ===== */
.message-box {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.pass-message, .fail-message {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.6;
}

/* ===== RESULTS ACTIONS ===== */
.results-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* ===== DETAILED RESULTS ===== */
.section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid rgba(37, 99, 235, 0.3);
}

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

.result-item {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border-left: 4px solid transparent;
}

.result-item.correct {
    border-left-color: var(--color-correct);
    background: rgba(39, 174, 96, 0.05);
}

.result-item.wrong {
    border-left-color: var(--color-wrong);
    background: rgba(231, 76, 60, 0.05);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid rgba(15, 23, 42, 0.10);
}

.result-number {
    font-weight: 700;
    color: var(--color-text);
}

.result-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
}

.result-item.correct .result-status {
    color: var(--color-correct);
}

.result-item.wrong .result-status {
    color: var(--color-wrong);
}

.status-icon {
    font-size: 18px;
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.result-strings {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.result-string {
    padding: var(--spacing-sm);
    background: rgba(15, 23, 42, 0.08);
    border-radius: 8px;
}

.string-value {
    font-family: 'Courier New', Courier, monospace;
    font-weight: 700;
    font-size: 16px;
    color: var(--color-text);
    letter-spacing: 2px;
    display: block;
    margin-top: 4px;
}

.result-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.detail-item {
    padding: var(--spacing-xs);
    background: rgba(15, 23, 42, 0.06);
    border-radius: 6px;
}

.detail-label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.detail-value {
    display: block;
    font-weight: 700;
    font-size: 14px;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    #visual-comparison-test-container {
        margin: 20px auto;
        padding: 15px;
    }
    
    .test-card {
        padding: var(--spacing-md);
    }
    
    .test-title {
        font-size: 26px;
    }
    
    .test-description {
        font-size: 16px;
    }
    
    .test-info {
        grid-template-columns: 1fr;
    }
    
    .comparison-container {
        flex-direction: column;
    }
    
    .string-box {
        width: 100%;
        min-width: unset;
    }
    
    .string-display {
        font-size: 22px;
        letter-spacing: 2px;
    }
    
    .vs-separator {
        transform: rotate(90deg);
    }
    
    .answer-buttons {
        grid-template-columns: 1fr;
    }
    
    .results-stats {
        grid-template-columns: 1fr;
    }
    
    .results-actions {
        grid-template-columns: 1fr;
    }
    
    .result-strings {
        grid-template-columns: 1fr;
    }
    
    .result-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .test-title {
        font-size: 22px;
    }
    
    .string-display {
        font-size: 18px;
        letter-spacing: 1px;
    }
    
    .answer-btn {
        padding: 18px 16px;
        font-size: 18px;
    }
    
    .btn-icon {
        font-size: 28px;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    #visual-comparison-test-container {
        background: white;
        color: black;
    }
    
    .primary-btn, .secondary-btn {
        display: none;
    }
    
    #timer-container, #progress-container {
        display: none;
    }
}