/**
 * Quiz Application - Custom Styles
 * Application-specific styles for quiz interface
 */

/* ========================================
   App Container & Layout
   ======================================== */
.app-container {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    display: flex;
    flex-direction: column;
}

/* ========================================
   Header
   ======================================== */
.app-header {
    background: var(--primary);
    color: white;
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    flex: 1;
    padding: var(--spacing-md);
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

/* ========================================
   Screens
   ======================================== */
.screen {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screen-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.screen-header h2 {
    color: var(--on-surface);
    margin-bottom: var(--spacing-sm);
}

.screen-header .subtitle {
    color: var(--on-surface-variant);
}

/* ========================================
   Loading State
   ======================================== */
.loading-container {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.loading-container p {
    margin-top: var(--spacing-md);
    color: var(--on-surface-variant);
}

/* ========================================
   Batch Selector
   ======================================== */
.batch-list {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr;
}

.batch-card {
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.batch-card:hover {
    transform: translateY(-2px);
}

.batch-card:active {
    transform: translateY(0);
}

.batch-card-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.batch-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

/* ========================================
   Quiz Progress
   ======================================== */
.quiz-progress {
    margin-bottom: var(--spacing-lg);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--on-surface);
}

/* ========================================
   Quiz Scorecard
   ======================================== */
.quiz-scorecard {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
}

.score-item {
    text-align: center;
    flex: 1;
}

.score-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.score-label {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.score-correct .score-value {
    color: var(--success);
}

.score-wrong .score-value {
    color: var(--error);
}

.score-remaining .score-value {
    color: var(--primary);
}

/* ========================================
   Question Card
   ======================================== */
.question-card {
    margin-bottom: var(--spacing-lg);
}

.quiz-question {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--on-surface);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.quiz-answers {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Answer feedback icons */
.answer-icon {
    margin-left: var(--spacing-sm);
    font-size: 1.25rem;
}

.answer-icon.correct {
    color: var(--success);
}

.answer-icon.wrong {
    color: var(--error);
}

/* ========================================
   Quiz Actions
   ======================================== */
.quiz-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.quiz-actions .mdc-button {
    min-width: 200px;
}

/* ========================================
   Results Screen
   ======================================== */
.results-container {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.results-header {
    margin-bottom: var(--spacing-xl);
}

.results-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.results-header h2 {
    color: var(--on-surface);
    margin-bottom: var(--spacing-sm);
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card.stat-correct .stat-value {
    color: var(--success);
}

.stat-card.stat-wrong .stat-value {
    color: var(--error);
}

.stat-card.stat-percentage .stat-value {
    color: var(--primary);
}

.results-message {
    font-size: 1.125rem;
    color: var(--on-surface-variant);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--radius-md);
}

.results-message.excellent {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.results-message.good {
    background: rgba(25, 118, 210, 0.1);
    color: var(--primary);
    border-left: 4px solid var(--primary);
}

.results-message.needs-improvement {
    background: rgba(255, 152, 0, 0.1);
    color: var(--warning);
    border-left: 4px solid var(--warning);
}

.results-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 400px;
    margin: 0 auto;
}

/* ========================================
   Footer
   ======================================== */
.app-footer {
    background: var(--surface);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md);
    text-align: center;
}

.footer-text {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    margin: 0;
}

/* ========================================
   Responsive Design - Tablet
   ======================================== */
@media (min-width: 600px) {
    .main-content {
        padding: var(--spacing-lg);
    }

    .batch-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .quiz-question {
        font-size: 1.5rem;
    }

    .results-actions {
        flex-direction: row;
        justify-content: center;
    }
}

/* ========================================
   Responsive Design - Desktop
   ======================================== */
@media (min-width: 960px) {
    .app-title {
        font-size: 2rem;
    }

    .batch-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .quiz-question {
        font-size: 1.75rem;
    }

    .quiz-actions .mdc-button {
        min-width: 250px;
    }
}

/* ========================================
   Landscape Orientation
   ======================================== */
@media (orientation: landscape) and (max-height: 600px) {
    .quiz-question {
        font-size: 1.125rem;
        margin-bottom: var(--spacing-md);
    }

    .quiz-scorecard {
        padding: var(--spacing-sm);
    }

    .score-value {
        font-size: 1.5rem;
    }

    .quiz-answers {
        gap: var(--spacing-sm);
    }

    .results-icon {
        font-size: 3rem;
    }

    .stat-value {
        font-size: 2rem;
    }
}

/* ========================================
   Touch Optimizations
   ======================================== */
@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets on touch devices */
    .batch-card {
        padding: var(--spacing-lg);
    }

    .mdc-button {
        min-height: 52px;
    }

    .mdc-checkbox {
        min-height: 52px;
    }
}

/* ========================================
   Dark Mode Support (future enhancement)
   ======================================== */
@media (prefers-color-scheme: dark) {
    /* Can be implemented later if needed */
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .app-header,
    .app-footer,
    .quiz-actions,
    .results-actions {
        display: none;
    }

    .main-content {
        max-width: 100%;
    }
}