/* Responsive Design - Mobile-First Approach */
/* Marvel Quiz Game Responsive Styles */

/* Base Mobile Styles (320px and up) */
:root {
    --mobile-padding: 1rem;
    --mobile-margin: 0.5rem;
    --mobile-font-size: 0.875rem;
    --mobile-heading-size: 1.5rem;
    --mobile-button-height: 48px;
    --mobile-touch-target: 44px;
}

/* Mobile-First Base Styles */
.container {
    width: 100%;
    max-width: 100vw;
    padding: 0 var(--mobile-padding);
    margin: 0 auto;
    box-sizing: border-box;
}

/* Typography Responsive */
h1 {
    font-size: var(--mobile-heading-size);
    line-height: 1.2;
    margin-bottom: var(--mobile-margin);
}

h2 {
    font-size: 1.25rem;
    line-height: 1.3;
}

h3 {
    font-size: 1.125rem;
    line-height: 1.4;
}

p, .text {
    font-size: var(--mobile-font-size);
    line-height: 1.5;
}

/* Button Responsive */
.btn, .glass-btn {
    min-height: var(--mobile-button-height);
    padding: 0.75rem 1rem;
    font-size: var(--mobile-font-size);
    border-radius: 8px;
    width: 100%;
    margin-bottom: var(--mobile-margin);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* Game Interface Mobile */
.game-container {
    padding: var(--mobile-padding);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.question-card {
    margin-bottom: var(--mobile-margin);
    padding: 1rem;
    border-radius: 12px;
}

.question-text {
    font-size: 1rem;
    line-height: 1.4;
    margin-bottom: 1rem;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--mobile-margin);
    margin-bottom: 1rem;
}

.option-btn {
    padding: 1rem;
    text-align: left;
    border-radius: 8px;
    min-height: var(--mobile-touch-target);
    font-size: var(--mobile-font-size);
    line-height: 1.3;
}

/* Progress and Score Mobile */
.progress-container {
    margin-bottom: 1rem;
}

.progress-bar {
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.score-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    font-size: var(--mobile-font-size);
}

.timer {
    font-size: 1.125rem;
    font-weight: bold;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    min-width: 80px;
    text-align: center;
}

/* Navigation Mobile */
.nav-controls {
    display: flex;
    gap: var(--mobile-margin);
    margin-top: auto;
    padding-top: 1rem;
}

.nav-controls .btn {
    flex: 1;
    margin-bottom: 0;
}

/* Modal Mobile */
.modal {
    padding: var(--mobile-padding);
    margin: var(--mobile-padding);
    border-radius: 12px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content {
    padding: 1rem;
}

/* Results Screen Mobile */
.results-container {
    text-align: center;
    padding: 2rem var(--mobile-padding);
}

.final-score {
    font-size: 2rem;
    margin: 1rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 1rem 0;
}

.stat-item {
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

/* Loading States Mobile */
.loading-spinner {
    width: 40px;
    height: 40px;
    margin: 2rem auto;
}

.skeleton {
    height: 20px;
    margin-bottom: 0.5rem;
    border-radius: 4px;
}

/* Small Mobile (up to 375px) */
@media (max-width: 375px) {
    :root {
        --mobile-padding: 0.75rem;
        --mobile-margin: 0.375rem;
        --mobile-font-size: 0.8125rem;
        --mobile-heading-size: 1.375rem;
    }
    
    .question-text {
        font-size: 0.9375rem;
    }
    
    .option-btn {
        padding: 0.875rem;
        font-size: 0.8125rem;
    }
    
    .final-score {
        font-size: 1.75rem;
    }
}

/* Large Mobile / Small Tablet (576px and up) */
@media (min-width: 576px) {
    :root {
        --mobile-padding: 1.5rem;
        --mobile-margin: 0.75rem;
        --mobile-font-size: 0.9375rem;
        --mobile-heading-size: 1.75rem;
    }
    
    .container {
        max-width: 540px;
    }
    
    .options-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .btn {
        width: auto;
        min-width: 120px;
    }
    
    .nav-controls .btn {
        flex: none;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Tablet (768px and up) */
@media (min-width: 768px) {
    :root {
        --mobile-padding: 2rem;
        --mobile-margin: 1rem;
        --mobile-font-size: 1rem;
        --mobile-heading-size: 2rem;
    }
    
    .container {
        max-width: 720px;
    }
    
    .game-container {
        padding: 2rem;
    }
    
    .question-card {
        padding: 2rem;
        margin-bottom: 2rem;
    }
    
    .question-text {
        font-size: 1.125rem;
        margin-bottom: 1.5rem;
    }
    
    .options-grid {
        gap: 1rem;
    }
    
    .option-btn {
        padding: 1.25rem;
        font-size: 1rem;
    }
    
    .modal {
        margin: 2rem auto;
        max-width: 600px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop (992px and up) */
@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
    
    .game-container {
        max-width: 800px;
        margin: 0 auto;
    }
    
    .question-card {
        padding: 2.5rem;
    }
    
    .question-text {
        font-size: 1.25rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    
    .option-btn {
        padding: 1.5rem;
        font-size: 1.0625rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .nav-controls {
        justify-content: center;
        gap: 1rem;
    }
}

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
    
    .game-container {
        max-width: 900px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    .question-text {
        font-size: 1.375rem;
    }
    
    .final-score {
        font-size: 3rem;
    }
}

/* Extra Large Desktop (1400px and up) */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
    
    .game-container {
        max-width: 1000px;
    }
}

/* Landscape Mobile Orientation */
@media (max-height: 500px) and (orientation: landscape) {
    .game-container {
        padding: 1rem;
        min-height: 0;
    }
    
    .question-card {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .question-text {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    .option-btn {
        padding: 0.75rem;
    }
    
    .modal {
        max-height: 80vh;
        margin: 1rem;
    }
}

/* High DPI / Retina Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .glass-card {
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
    }
    
    .progress-bar {
        height: 10px;
    }
}

/* Reduced Motion Preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Responsive Adjustments */
@media (prefers-color-scheme: dark) {
    .glass-card {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .option-btn {
        background: rgba(255, 255, 255, 0.08);
        color: var(--text-light);
    }
    
    .option-btn:hover {
        background: rgba(255, 255, 255, 0.12);
    }
}

/* Print Styles */
@media print {
    .game-container {
        background: white;
        color: black;
    }
    
    .glass-card {
        background: white;
        border: 1px solid #ccc;
        box-shadow: none;
    }
    
    .btn {
        display: none;
    }
    
    .timer {
        display: none;
    }
}

/* Accessibility - Focus Styles */
@media (any-hover: hover) {
    .option-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }
}

/* Touch Device Optimizations */
@media (any-pointer: coarse) {
    .option-btn {
        min-height: 48px;
        padding: 1rem;
    }
    
    .btn {
        min-height: 48px;
        padding: 0.875rem 1.5rem;
    }
    
    .timer {
        min-height: 44px;
        padding: 0.75rem 1rem;
    }
}

/* Fine Pointer (Mouse) Optimizations */
@media (any-pointer: fine) {
    .option-btn {
        min-height: 40px;
        padding: 0.75rem 1rem;
    }
    
    .btn {
        min-height: 40px;
        padding: 0.625rem 1.25rem;
    }
}