/* Base styles and variables */
:root {
    --background-color: white;
    --primary-color: #4A90E2;
    --success-color: #6ABF69;
    --text-color: #2C3E50;
    --border-color: #E1E1E1;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --subtle-bg: #F8F9FA;
}

/* Fixed positioning utility classes and safeguards */
/* Ensure these elements don't create containing blocks that break position: fixed */
html, body {
    /* Ensure no problematic properties on root elements */
    transform: none !important;
    filter: none !important;
    perspective: none !important;
    contain: none !important;
    will-change: auto !important;
    backdrop-filter: none !important;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Inter', 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    /* filter: contrast(120%); - Removed as it breaks position: fixed by creating a containing block */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Small-to-medium desktop responsiveness to avoid overlap of fixed UI */
@media screen and (max-width: 1700px) {
    /* Provide breathing room under hidden fixed controls */
    .container {
        padding-top: 70px;
    }
}

.upload-container {
    background: #f5f5f5;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.form-section {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.answer-section {
    background: white;
    padding: 20px;
    border-radius: 8px;
}

#submitAnswers {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 20px;
}

#submitAnswers:hover {
    background-color: #45a049;
}

#results {
    margin-top: 20px;
    padding: 20px;
    background: white;
    border-radius: 8px;
}

.available-maturas {
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: #f5f5f5;
    border-radius: 8px;
}

.matura-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.matura-item {
    padding: 1rem;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.matura-item h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
}

.matura-item button {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.matura-item button:hover {
    background-color: #45a049;
}

/* Question styles */
.question {
    background: transparent;
    border-radius: 0;
    padding: 24px;
    margin-bottom: 32px;
    box-shadow: none;
    border: none;
}

/* Przecinki (comma placement) task styles - Updated for seamless white background */
.przecinki-container {
    margin: 30px 0;
    padding: 0;
    background-color: white;
    border: none;
    border-radius: 0;
    max-width: 100%;
    overflow-x: auto;
    box-sizing: border-box;
}

.przecinki-text {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 18px;
    line-height: 1.8;
    color: #2c3e50;
    margin-bottom: 0;
    padding: 25px;
    background-color: white;
    border: none;
    border-radius: 0;
    text-align: justify;
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
    box-sizing: border-box;
}

.przecinki-text .word {
    display: inline;
    margin: 0;
    padding: 0;
    font-weight: normal;
    color: #2c3e50;
    letter-spacing: 0.3px;
    word-spacing: normal;
}

.przecinki-text .clickable-space {
    display: inline-block;
    position: relative;
    width: 14px;
    height: 24px;
    cursor: pointer;
    margin: 0 2px;
    vertical-align: baseline;
    transition: all 0.2s ease;
    border-radius: 3px;
}

.przecinki-text .clickable-space:hover {
    background-color: rgba(52, 152, 219, 0.1);
    transform: scale(1.1);
}

.przecinki-text .clickable-space:hover::after {
    content: ',';
    position: absolute;
    top: -3px;
    left: 50%;
    transform: translateX(-50%);
    color: #3498db;
    font-size: 20px;
    font-weight: bold;
    pointer-events: none;
    transition: all 0.2s ease;
}

.przecinki-text .clickable-space.selected {
    background-color: rgba(46, 204, 113, 0.15);
    border-radius: 3px;
}

.przecinki-text .clickable-space.selected::after {
    content: ',';
    position: absolute;
    top: -3px;
    left: 50%;
    transform: translateX(-50%);
    color: #27ae60;
    font-size: 20px;
    font-weight: bold;
    pointer-events: none;
    transition: all 0.2s ease;
}

/* Enhanced mobile optimization for przecinki tasks */
@media screen and (max-width: 768px) {
    .przecinki-container {
        padding: 0;
        margin: 20px 0;
    }
    
    .przecinki-text {
        font-size: 19px;
        line-height: 1.9;
        padding: 20px 15px;
        text-align: left;
    }
    
    .przecinki-text .clickable-space {
        width: 18px;
        height: 28px;
        margin: 0 3px;
        touch-action: manipulation;
    }
    
    .przecinki-text .clickable-space:hover,
    .przecinki-text .clickable-space:active {
        background-color: rgba(52, 152, 219, 0.2);
        transform: scale(1.15);
    }
    
    .przecinki-text .clickable-space:hover::after,
    .przecinki-text .clickable-space.selected::after {
        font-size: 22px;
        top: -4px;
    }
    
    .przecinki-text .word {
        letter-spacing: 0.4px;
    }
}

.question-header {
    margin-bottom: 20px;
}

.question-header h3 {
    color: var(--text-color);
    font-size: 20px;
    font-weight: 600;
}

.debug-audio-task {
    background-color: #EBF5FF !important;
    color: var(--primary-color) !important;
    padding: 6px 12px !important;
    border-radius: 6px !important;
    font-size: 14px !important;
    margin-left: 12px !important;
    border: 1px solid #D1E9FF !important;
    font-weight: 500 !important;
}

.instruction {
    background-color: transparent;
    padding: 16px;
    border-radius: 0;
    margin-bottom: 20px;
    font-size: 16px;
    color: #495057;
    border-left: 4px solid var(--primary-color);
}

.question-content {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    max-width: 75ch;
    margin-bottom: 24px;
    /* Prevent inner vertical scrollbars in task content */
    overflow-x: hidden;
    overflow-y: visible;
}

/* Make MathJax inline/display containers responsive within text blocks */
.question-content mjx-container,
.instruction mjx-container,
.main-task-content-text mjx-container,
.tex2jax_process mjx-container {
    display: inline-block;
    max-width: 100% !important;
    overflow-wrap: anywhere;
    word-break: break-word;
    white-space: normal !important;
}

/* Align inline math with surrounding text baseline */
.question-content mjx-container:not([display="true"]),
.instruction mjx-container:not([display="true"]),
.main-task-content-text mjx-container:not([display="true"]),
.tex2jax_process mjx-container:not([display="true"]),
mjx-container[jax="SVG"]:not([display="true"]) {
    vertical-align: -0.1em; /* adjust if needed to best match your font */
}

/* Prevent MathJax SVG output from overflowing horizontally */
.question-content .MathJax svg,
.instruction .MathJax svg,
.main-task-content-text .MathJax svg,
.tex2jax_process .MathJax svg,
mjx-container[jax="SVG"] svg {
    max-width: 100% !important;
    height: auto;
}

/* Ensure task content containers never create their own vertical scrollbars */
.instruction,
.main-task-content,
.main-task-content-wrapper,
.main-task-content-text,
.question,
.task-container,
.question-container,
.task-content-area,
.tex2jax_process {
    overflow-y: visible !important;
    max-height: none !important;
}

/* Hide any scrollbars that a UA might still render (cross-browser) */
.question-content,
.instruction,
.main-task-content,
.main-task-content-wrapper,
.main-task-content-text,
.question,
.task-container,
.question-container,
.task-content-area,
.tex2jax_process {
    scrollbar-width: none;       /* Firefox */
    -ms-overflow-style: none;    /* IE/Edge legacy */
}

.question-content::-webkit-scrollbar,
.instruction::-webkit-scrollbar,
.main-task-content::-webkit-scrollbar,
.main-task-content-wrapper::-webkit-scrollbar,
.main-task-content-text::-webkit-scrollbar,
.question::-webkit-scrollbar,
.task-container::-webkit-scrollbar,
.question-container::-webkit-scrollbar,
.task-content-area::-webkit-scrollbar,
.tex2jax_process::-webkit-scrollbar {
    display: none;               /* WebKit */
}

/* Table styles */
.question-table {
    margin: 24px 0;
    overflow-x: auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.question-table table {
    border-collapse: collapse;
    width: 100%;
    border: 1px solid var(--border-color);
    background: white;
}

.question-table table td,
.question-table table th {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
    color: var(--text-color);
}

.question-table .editable-cell {
    background-color: #F8F9FA;
    border: 1px solid var(--border-color) !important;
}

.question-table .table-input {
    width: 100%;
    padding: 12px;
    border: none;
    background-color: transparent;
    color: var(--text-color);
    font-size: 16px;
}

.question-table .readonly-cell {
    background-color: white;
    color: var(--text-color);
}

/* Button styles */
button {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

button:hover {
    background-color: #357ABD;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.2);
}

button:disabled {
    background-color: #E1E1E1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Submit button specific styles */
.submit-btn {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 40px auto;
    padding: 16px 32px;
    background: linear-gradient(135deg, #4A90E2 0%, #67B26F 100%);
    color: white;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.15);
    transition: all 0.3s ease;
    position: sticky;
    bottom: 20px;
    z-index: 100;
    border: 1px solid white;
    backdrop-filter: blur(4px);
}

.submit-btn:hover {
    background: linear-gradient(135deg, #357ABD 0%, #5CAF5C 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(74, 144, 226, 0.25);
}

.submit-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.2);
    background: linear-gradient(135deg, #2E6AA8 0%, #519A47 100%);
}

.submit-btn:disabled {
    background: linear-gradient(135deg, #B8B8B8 0%, #CCCCCC 100%);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 0.7;
}

/* Add a subtle glow effect to the button container */
.submit-button-container {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 20px 0;
    background: linear-gradient(to top, white 0%, white 70%, white 100%);
}

.submit-button-container::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% - 40px);
    max-width: 320px;
    height: 100%;
    background: radial-gradient(circle at center, rgba(74, 144, 226, 0.1) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* Audio player styles */
.audio-player-container {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 20px;
    margin: 24px 0;
    box-shadow: none;
}

.audio-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 16px;
}

.play-btn, .pause-btn {
    background-color: var(--primary-color);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.play-btn:hover, .pause-btn:hover {
    background-color: #357ABD;
}

.audio-progress {
    height: 8px;
    background-color: #EBF5FF;
    border-radius: 4px;
}

.audio-progress.normal-mode {
    cursor: default;
    pointer-events: none;
    opacity: 0.8;
}

.progress-bar {
    background-color: var(--primary-color);
    border-radius: 4px;
}

.time-display {
    font-family: 'Inter', monospace;
    color: var(--text-color);
    font-size: 14px;
}

.audio-status {
    color: #6C757D;
    font-size: 14px;
    margin-top: 12px;
}

/* FIXED POSITIONING UTILITIES AND DOCUMENTATION */
/* 
 * The following properties create "containing blocks" that break position: fixed:
 * - filter (any value except 'none')
 * - transform (any value except 'none') 
 * - perspective (any value except 'none')
 * - contain (paint, layout, strict, content)
 * - will-change (any value that would create a stacking context)
 * - backdrop-filter (any value except 'none')
 * 
 * When these properties are applied to parent elements, position: fixed 
 * behaves like position: absolute relative to that parent instead of the viewport.
 */

/* Utility class to fix broken fixed positioning */
.fix-containing-block {
    transform: none !important;
    filter: none !important;
    perspective: none !important;
    contain: none !important;
    will-change: auto !important;
    backdrop-filter: none !important;
}

/* Utility class for properly fixed elements */
.truly-fixed {
    position: fixed !important;
    transform: none !important;
    will-change: auto !important;
    z-index: 9999;
}

.plan-badge {
    background: linear-gradient(135deg, #3498db, #2ecc71);
    color: white;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

/* Gradient button utility */
.btn-gradient {
    background: linear-gradient(135deg, #3498db 0%, #2ecc71 100%);
    color: white !important;
    border: none;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.15);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(52, 152, 219, 0.25);
    text-decoration: none;
}

.btn-gradient:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.2);
}

/* Mobile-only layout adjustments for audio player */
@media screen and (max-width: 768px) {
    /* Force flex wrap and add row break so buttons appear under progress bar */
    .audio-controls {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
        justify-content: center;
    }

    .audio-controls::after {
        /* Invisible flex item that takes full row width, inserting a line break */
        content: "";
        flex-basis: 100%;
        height: 0;
        order: 3; /* comes after progress bar */
    }

    .audio-controls .time-display {
        order: 1;
        margin-right: 8px;
    }

    .audio-controls .audio-progress {
        order: 2;
        flex: 1 1 auto;
        min-width: 140px;
    }

    /* Re-order buttons so they appear after the forced break */
    .audio-controls .play-pause-btn,
    .audio-controls .play-btn,
    .audio-controls .pause-btn,
    .audio-controls .rewind-btn,
    .audio-controls .forward-btn {
        order: 4;
        flex: 0 0 auto;
        width: 48px;
        margin-top: 4px;
    }

    .play-pause-btn:focus, .play-pause-btn:active {
        outline: none !important;
        box-shadow: none !important;
        border: none !important;
    }
}

/* Mobile tap highlight removal for exam pages - MOBILE ONLY */
@media screen and (max-width: 768px) {
    /* Remove tap highlight from all buttons in exam pages */
    button,
    input[type="button"],
    input[type="submit"],
    .btn,
    .submit-btn,
    .play-pause-btn,
    .volume-btn,
    .rewind-btn,
    .forward-btn,
    .mobile-exam-toggle,
    .exam-menu-close,
    .exam-menu-exit,
    .select-topic-btn,
    .canvas-tool,
    .back-to-options-btn,
    .delete-image-btn,
    .canvas-resize-btn,
    .modal-btn,
    .modal-btn-primary,
    .modal-btn-secondary,
    .solution-option,
    .answer-option,
    .radio-option,
    .checkbox-option {
        -webkit-tap-highlight-color: transparent !important;
        -webkit-touch-callout: none !important;
        -webkit-user-select: none !important;
        -khtml-user-select: none !important;
        -moz-user-select: none !important;
        -ms-user-select: none !important;
        user-select: none !important;
        touch-action: manipulation !important;
    }
    
    /* Remove tap highlight from clickable elements */
    .audio-timeline-clickable,
    .audio-progress,
    .progress-bar,
    .question-number,
    .question-content,
    .answer-section,
    .task-container,
    .writing-area,
    .task-section {
        -webkit-tap-highlight-color: transparent !important;
        -webkit-touch-callout: none !important;
        -webkit-user-select: none !important;
        -khtml-user-select: none !important;
        -moz-user-select: none !important;
        -ms-user-select: none !important;
        user-select: none !important;
    }
    
    /* Allow text selection in textareas and inputs */
    textarea,
    input[type="text"],
    input[type="number"],
    input[type="email"],
    input[type="password"],
    input[type="search"],
    input[type="url"],
    input[type="tel"],
    .editable-content {
        -webkit-tap-highlight-color: transparent !important;
        -webkit-touch-callout: default !important;
        -webkit-user-select: text !important;
        -khtml-user-select: text !important;
        -moz-user-select: text !important;
        -ms-user-select: text !important;
        user-select: text !important;
    }
}