/* ============================================
   TUNEUP - Mobile Web App Styling
   ============================================ */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --primary-dark: #6d28d9;
    --secondary: #06b6d4;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --background: #f5f5f5;
    --surface: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.875rem;
    --font-size-3xl: 2.25rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: var(--font-family);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-primary);
    overflow: hidden;
    margin: 0;
    padding: 0;
}

/* Hide scrollbars across all browsers */
html, body, .screen {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

html::-webkit-scrollbar, body::-webkit-scrollbar, .screen::-webkit-scrollbar {
    display: none;
}

/* App Container */
.app-container {
    width: 100vw;
    max-width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Screen Management */
.screen {
    display: none;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    animation: slideIn 0.3s ease-out;
    overflow: hidden;
    padding: var(--spacing-md);
}

.screen::-webkit-scrollbar {
    display: none;
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Screen Content */
.screen-content {
    width: calc(100% - var(--spacing-md) * 2);
    max-width: 420px;
    max-height: calc(100vh - var(--spacing-md) * 2);
    margin: auto;
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--radius-xl);
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-light) transparent;
}

/* Only change the first page */
#screen-home {
    background-image: url('../Balck.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

#screen-home .screen-content {
    background: rgba(255, 255, 255, 0.15);
    box-shadow: none;
    backdrop-filter: blur(4px);
}

/* Typography */
h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
}

h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

p {
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-secondary);
}

.description {
    font-size: var(--font-size-lg);
    text-align: center;
    color: var(--text-secondary);
}

.subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
}

/* Icons */
.guitar-icon {
    font-size: 3.5rem;
    text-align: center;
    margin: var(--spacing-xl) 0;
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    background-color: var(--primary-dark);
    transform: scale(0.98);
}

.btn-secondary {
    background-color: var(--surface);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:active {
    background-color: var(--primary);
    color: white;
}

.btn-help {
    background-color: #fef3c7;
    color: var(--warning);
    border: 2px solid var(--warning);
}

.btn-help:active {
    background-color: var(--warning);
    color: white;
}

/* Input Fields */
.input-field {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    font-family: var(--font-family);
    transition: border-color 0.3s ease;
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.input-field::placeholder {
    color: var(--text-secondary);
}

/* Step Indicator */
.step-indicator {
    display: inline-block;
    background-color: rgba(124, 58, 237, 0.1);
    color: var(--primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-align: center;
}

/* Option Buttons */
.question-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.option-btn {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border: 2px solid var(--border-color);
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
    font-weight: 500;
}

.option-btn:active {
    border-color: var(--primary);
    background-color: rgba(124, 58, 237, 0.05);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.option-btn.selected {
    border-color: var(--primary);
    background-color: var(--primary);
    color: white;
}

/* Intro Text */
.intro-text {
    font-size: var(--font-size-base);
    line-height: 1.8;
    text-align: center;
}

/* String Cards */
.string-cards-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.string-card {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.string-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.string-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.string-note {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

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

.progress-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: right;
}

/* Media Placeholder */
.media-placeholder {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    margin: var(--spacing-md) 0;
}

.large-note {
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.string-label-large {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-top: var(--spacing-md);
}

/* Instructions Box */
.instructions-box {
    background-color: #f9f9f9;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
}

.instructions-box h3 {
    margin-bottom: var(--spacing-md);
}

.instructions-box ol {
    list-style: decimal;
    list-style-position: inside;
    line-height: 1.8;
}

.instructions-box li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

/* Help and Mistakes Box */
.mistakes-box,
.help-box {
    background-color: #e0e7ff;
    border-left: 4px solid var(--primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin: var(--spacing-md) 0;
    color: var(--text-primary);
    line-height: 1.6;
}

.help-box {
    background-color: #fef3c7;
    border-left-color: var(--warning);
}

/* Confidence Rating */
.confidence-rating {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.rating-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background-color: var(--surface);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.rating-btn:active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.rating-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.confidence-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Challenge Questions */
.question-text {
    font-size: var(--font-size-lg);
    font-weight: 500;
    text-align: center;
    margin: var(--spacing-lg) 0;
    line-height: 1.6;
}

.answer-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.answer-btn {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border: 2px solid var(--border-color);
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
    font-weight: 500;
    text-align: left;
}

.answer-btn:active {
    border-color: var(--primary);
    background-color: rgba(124, 58, 237, 0.05);
}

.answer-btn.correct {
    border-color: var(--success);
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.answer-btn.incorrect {
    border-color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* Explanation Display */
.explanation-correct,
.explanation-incorrect {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    line-height: 1.8;
    animation: slideIn 0.3s ease;
}

.explanation-correct {
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.5);
    color: var(--text-primary);
}

.explanation-correct strong {
    color: var(--success);
}

.explanation-incorrect {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: var(--text-primary);
}

.explanation-incorrect strong {
    color: var(--danger);
}

.explanation-incorrect em {
    color: var(--success);
    font-style: italic;
    font-weight: 600;
}

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

/* Results Screen */
.score-display {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    margin: var(--spacing-lg) 0;
}

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

.score-percentage {
    font-size: var(--font-size-xl);
    opacity: 0.9;
}

.score-feedback {
    font-size: var(--font-size-base);
    text-align: center;
    line-height: 1.8;
    margin: var(--spacing-lg) 0;
}

/* Make only this outer review card transparent */
.mistakes-review .review-item {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.review-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    border-left: 4px solid var(--primary-light);
    background-color: rgba(124, 58, 237, 0.05);
    border-radius: var(--radius-md);
}

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

.review-header {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.review-question {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
}

.review-answer-incorrect,
.review-answer-correct {
    font-size: var(--font-size-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.review-answer-incorrect {
    background-color: rgba(239, 68, 68, 0.08);
    border-left: 3px solid var(--danger);
}

.review-answer-correct {
    background-color: rgba(16, 185, 129, 0.08);
    border-left: 3px solid var(--success);
}

.review-answer-incorrect .label {
    font-weight: 600;
    color: var(--danger);
}

.review-answer-correct .label {
    font-weight: 600;
    color: var(--success);
}

.answer-text {
    color: var(--text-primary);
    font-weight: 500;
}

.review-explanation {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    background-color: rgba(107, 114, 128, 0.05);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--text-secondary);
    line-height: 1.6;
}

.review-explanation strong {
    color: var(--text-primary);
}

/* Review Section - Focus Areas */
.review-section {
    background-color: #fef3c7;
    border: 2px solid #fcd34d;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
}

.review-messages-list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.review-message-item {
    background-color: white;
    border-left: 4px solid var(--warning);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.5;
}

.review-message-item:last-child {
    margin-bottom: 0;
}

/* Certificate */
.certificate-content {
    justify-content: center;
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    padding: var(--spacing-lg);
}

.certificate {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-lg);
}

.certificate-trophy {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.certificate-title {
    color: var(--warning);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.certificate-divider {
    height: 2px;
    background-color: var(--warning);
    margin: var(--spacing-md) 0;
}

.certificate-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin: var(--spacing-sm) 0;
}

.certificate-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-md) 0;
}

.certificate-course {
    font-size: var(--font-size-xl);
    color: var(--primary);
    margin: var(--spacing-md) 0;
    font-weight: 700;
}

.certificate-date {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 480px) {
    .app-container {
        max-width: 100%;
        width: 100vw;
    }

    .screen-content {
        padding: var(--spacing-md);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: var(--font-size-xl);
    }

    .string-cards-container {
        grid-template-columns: 1fr;
    }
}

/* Portrait Orientation - Tall screens */
@media (orientation: portrait) and (max-height: 800px) {
    .screen-content {
        max-height: calc(100vh - var(--spacing-md) * 2);
        padding: var(--spacing-md);
    }
    
    .gap {
        gap: var(--spacing-sm);
    }
}

/* Landscape Orientation - Wide screens */
@media (orientation: landscape) {
    .app-container {
        height: 100vh;
    }
    
    .screen {
        height: 100vh;
        padding: var(--spacing-sm);
    }
    
    .screen-content {
        max-width: 600px;
        max-height: calc(100vh - var(--spacing-sm) * 2);
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    h1 {
        font-size: var(--font-size-2xl);
        margin: 0;
    }
    
    h2 {
        font-size: var(--font-size-lg);
        margin: 0;
    }
    
    h3 {
        font-size: var(--font-size-base);
        margin: 0;
    }
    
    p {
        font-size: var(--font-size-sm);
        line-height: 1.4;
        margin: 0;
    }
    
    .description, .subtitle {
        font-size: var(--font-size-sm);
    }
    
    .intro-text {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .string-cards-container {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }
    
    .string-card {
        padding: var(--spacing-md);
    }
    
    .guitar-icon {
        font-size: 2.5rem;
        margin: 0;
    }
    
    .step-indicator {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs);
    }
}

/* Accessibility */
.btn:focus,
.input-field:focus,
.option-btn:focus,
.answer-btn:focus,
.rating-btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Utility */
.hidden {
    display: none !important;
}

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

/* Landscape Mode Optimization */
@media (orientation: landscape) {
    .screen {
        padding: var(--spacing-sm);
    }
    
    .screen-content {
        max-height: calc(100vh - var(--spacing-sm) * 2);
        padding: var(--spacing-md);
    }
    
    h1 {
        font-size: var(--font-size-2xl);
    }
    
    h2 {
        font-size: var(--font-size-lg);
    }
    
    .description, .subtitle {
        font-size: var(--font-size-sm);
    }
}

/* ===== 1) Use guitar image as the background for ALL screens ===== */
html, body,
.app-container {
    background-image: url('../Balck.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

/* Optional: a very light dark overlay so text is easier to read */
.screen {
    background: rgba(0, 0, 0, 0.12);
}

/* ===== 2) Make the dialog/card transparent ===== */
.screen-content {
    background: rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

/* ===== 3) Make text clearer ===== */
:root {
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.88);
    --border-color: rgba(255, 255, 255, 0.25);
}

/* Main text */
h1, h2, h3,
p,
.description,
.subtitle,
.step-indicator,
.progress-text,
.confidence-labels,
.large-note,
.string-label-large,
.string-label,
.string-name,
.string-note {
    color: var(--text-primary);
}

.description,
.subtitle,
.progress-text {
    color: var(--text-secondary);
}

/* Add a little shadow to important text */
h1, h2, h3, p, .description, .subtitle {
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

/* ===== 4) Replace purple buttons with transparent/glass style ===== */
.btn-primary,
.btn-secondary,
.btn-help,
.option-btn,
.rating-btn {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow: none;
}

.btn-primary:active,
.btn-secondary:active,
.btn-help:active,
.option-btn.selected,
.rating-btn.active {
    background: rgba(255, 255, 255, 0.24);
    color: #ffffff;
}

/* ===== 5) Replace other purple areas ===== */
.string-card,
.media-placeholder,
.score-display,
.certificate {
    background: rgba(0, 0, 0, 0.25);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.progress-fill {
    background: rgba(255, 255, 255, 0.75);
}

/* Content boxes */
.instructions-box,
.mistakes-box,
.help-box {
    background: rgba(0, 0, 0, 0.22);
    color: #ffffff;
    border-left: 4px solid rgba(255, 255, 255, 0.45);
}

.instructions-box li,
.mistakes-box p,
.help-box p {
    color: #ffffff;
}

/* Input boxes */
.input-field {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.input-field::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

/* ===== Fix challenge answer buttons visibility ===== */
.answer-btn {
    background: rgba(255, 255, 255, 0.16) !important;
    color: #ffffff !important;
    border: 1.5px solid rgba(255, 255, 255, 0.35) !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    text-align: left;
    font-weight: 600;
}

/* when pressed but not yet marked correct/incorrect */
.answer-btn:active {
    background: rgba(255, 255, 255, 0.24) !important;
    color: #ffffff !important;
}

/* correct / incorrect states still visible */
.answer-btn.correct {
    background: rgba(16, 185, 129, 0.18) !important;
    border-color: #10b981 !important;
    color: #34d399 !important;
}

.answer-btn.incorrect {
    background: rgba(239, 68, 68, 0.18) !important;
    border-color: #ef4444 !important;
    color: #f87171 !important;
}

/* optional: make the question itself clearer too */
.question-text {
    color: #ffffff !important;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

/* ===== Results screen: make review sections match dark glass style ===== */

.mistakes-review {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Review title */
.review-header {
    color: #ffffff !important;
    font-size: 1.2rem;
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

/* Focus Areas big box */
.review-section {
    background: rgba(0, 0, 0, 0.28) !important;
    border: 1.5px solid rgba(255, 255, 255, 0.22) !important;
    border-radius: 20px;
    padding: 1rem;
    color: #ffffff !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Focus Areas title */
.review-section strong {
    color: #ffffff !important;
}

/* list wrapper */
.review-messages-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0 0;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* each focus message item */
.review-message-item {
    background: rgba(0, 0, 0, 0.22) !important;
    color: #ffffff !important;
    border-left: 4px solid rgba(255, 255, 255, 0.45) !important;
    border-radius: 14px;
    padding: 1rem;
    line-height: 1.6;
    box-shadow: none;
}

/* each incorrect-answer review card */
.review-item {
    background: rgba(0, 0, 0, 0.24) !important;
    border: 1.5px solid rgba(255, 255, 255, 0.18) !important;
    border-radius: 20px;
    padding: 1rem;
    color: #ffffff !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* question text */
.review-question {
    color: #ffffff !important;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 0.9rem;
}

/* wrong answer box */
.review-answer-incorrect {
    background: rgba(239, 68, 68, 0.14) !important;
    border-left: 4px solid #ef4444 !important;
    border-radius: 12px;
    padding: 0.9rem 1rem;
    color: #ffffff !important;
    margin-bottom: 0.75rem;
}

/* correct answer box */
.review-answer-correct {
    background: rgba(16, 185, 129, 0.14) !important;
    border-left: 4px solid #10b981 !important;
    border-radius: 12px;
    padding: 0.9rem 1rem;
    color: #ffffff !important;
    margin-bottom: 0.75rem;
}

/* explanation box */
.review-explanation {
    background: rgba(255, 255, 255, 0.08) !important;
    border-radius: 12px;
    padding: 0.9rem 1rem;
    color: #ffffff !important;
    line-height: 1.6;
}

/* labels and answer text */
.review-item .label,
.review-item .answer-text,
.review-explanation strong {
    color: #ffffff !important;
}

/* =====================================================
   INTERACTIONS: animation upgrades
   Paste at the VERY END of style.css
   ===================================================== */

/* smoother motion */
.screen,
.screen-content,
.btn,
.option-btn,
.answer-btn,
.rating-btn,
.string-card,
.review-item,
.review-message-item,
.review-section {
    transition: transform 0.28s ease, box-shadow 0.28s ease, opacity 0.28s ease, background-color 0.28s ease, border-color 0.28s ease;
}

/* screen entrance */
.screen.active .screen-content {
    animation: cardEntrance 0.45s ease both;
}

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(18px) scale(0.985);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* gentle floating home icon */
.guitar-icon {
    animation: floatY 2.8s ease-in-out infinite;
}

@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* button hover / tap feel */
.btn:hover,
.option-btn:hover,
.answer-btn:hover,
.rating-btn:hover {
    transform: translateY(-2px);
}

.btn:active,
.option-btn:active,
.answer-btn:active,
.rating-btn:active {
    transform: scale(0.97);
}

/* stagger reveal utility */
.stagger-in {
    animation: staggerIn 0.38s ease both;
}

@keyframes staggerIn {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* pulse when selected */
.pulse-once {
    animation: pulseOnce 0.35s ease;
}

@keyframes pulseOnce {
    0% { transform: scale(1); }
    40% { transform: scale(1.04); }
    100% { transform: scale(1); }
}

/* success / error feedback */
.correct-pop {
    animation: correctPop 0.45s ease;
}

@keyframes correctPop {
    0% { transform: scale(1); box-shadow: 0 0 0 rgba(16,185,129,0); }
    45% { transform: scale(1.03); box-shadow: 0 0 22px rgba(16,185,129,0.28); }
    100% { transform: scale(1); box-shadow: 0 0 0 rgba(16,185,129,0); }
}

.wrong-shake {
    animation: wrongShake 0.42s ease;
}

@keyframes wrongShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* progress bar smoother */
.progress-fill,
#challenge-progress-fill {
    transition: width 0.45s ease;
}

/* explanation reveal */
.explanation-correct,
.explanation-incorrect {
    animation: explanationReveal 0.35s ease both;
}

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

/* score / certificate celebration */
.score-display,
.certificate {
    animation: glowIn 0.55s ease both;
}

@keyframes glowIn {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
        box-shadow: 0 0 0 rgba(255,255,255,0);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
        box-shadow: 0 12px 30px rgba(0,0,0,0.18);
    }
}

/* little sparkle class for important elements */
.sparkle-once {
    animation: sparkleOnce 0.7s ease;
}

@keyframes sparkleOnce {
    0% { filter: brightness(1); }
    35% { filter: brightness(1.25); }
    100% { filter: brightness(1); }
}

/* ===== Certificate confetti ===== */

#screen-certificate {
    position: relative;
    overflow: hidden;
}

#screen-certificate .screen-content,
#screen-certificate .certificate {
    position: relative;
    z-index: 2;
}

.confetti-layer {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 20;
}

.confetti-piece {
    position: absolute;
    top: -12%;
    opacity: 0;
    border-radius: 2px;
    animation: confetti-fall linear forwards;
    will-change: transform, opacity;
}

@keyframes confetti-fall {
    0% {
        opacity: 0;
        transform: translate3d(0, -10vh, 0) rotate(0deg);
    }
    10% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate3d(var(--drift), 110vh, 0) rotate(720deg);
    }
}

/* optional: make the trophy feel more alive */
.certificate-trophy {
    animation: trophy-bounce 1.2s ease;
}

@keyframes trophy-bounce {
    0%   { transform: scale(0.8) translateY(-8px); opacity: 0; }
    50%  { transform: scale(1.08) translateY(0); opacity: 1; }
    100% { transform: scale(1); }
}