/* Import Google Font */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

:root {
    /* Dark Theme Colors */
    --primary-bg: #121212;
    --secondary-bg: #1e1e1e;
    --card-bg: #242424;
    --border-color: #333333;
    --text-color: #e0e0e0;
    --muted-text: #a0a0a0;
    --accent-color: #6200ee;
    --accent-hover: #7c4dff;
    --required-color: #cf6679; /* Red for "Обязательно" */
    --correct-color: #03dac6; /* Teal */
    --incorrect-color: #cf6679; /* Red */
    --partial-color: #ffb300; /* Yellow/Orange */
    --pass-color: var(--correct-color);
    --fail-color: var(--incorrect-color);
    --shadow-color: rgba(0, 0, 0, 0.5);
    
    /* Category Colors */
    --uk-color: #8e24aa;
    --ak-dk-color: #00897b;
    --laws-color: #1e88e5;
    --pk-color: #fb8c00;
    --ustav-color: #f44336;
    
    /* Animations */
    --transition-speed: 0.3s;
}

/* Hide scrollbars while maintaining scrolling functionality */
html, body {
    margin: 0;
    padding: 0;
    /* Remove restrictive height and overflow */
    /* height: 100vh; */
    /* max-height: 100vh; */
    /* overflow: hidden; */
    /* Remove scrollbar hiding */
    /* scrollbar-width: none; */
    /* -ms-overflow-style: none; */
}

html::-webkit-scrollbar, 
body::-webkit-scrollbar {
    width: 10px;
    height: 10px;
    display: block;
}

/* Also hide scrollbars on any scrollable elements */
.text-answer-display,
.answers-table,
.student-answers,
.category-questions {
    scrollbar-width: none;
    -ms-overflow-style: none;
    overflow: auto;
}

.text-answer-display::-webkit-scrollbar,
.answers-table::-webkit-scrollbar,
.student-answers::-webkit-scrollbar,
.category-questions::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
}

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: var(--primary-bg);
    color: var(--text-color);
    transition: background-color var(--transition-speed) ease;
    /* Remove restrictive height */
    /* height: 100vh; */
    box-sizing: border-box;
}

.quiz-container {
    min-height: 600px;
    /* Remove restrictive height and overflow */
    /* height: calc(100vh - 40px); */
    /* overflow: hidden; */
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--secondary-bg);
    padding: 20px 30px;
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-color);
    transition: all var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
}

h1 {
    text-align: center;
    color: var(--text-color);
    margin-bottom: 5px;
    font-weight: 700;
    font-size: 2.2em;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.author {
    text-align: center;
    color: var(--muted-text);
    margin-bottom: 30px;
    font-size: 0.9em;
    letter-spacing: 0.5px;
}

/* Mode Tabs Styles */
.mode-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.tab-button {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: none;
    border-radius: 10px;
    padding: 15px 25px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.tab-button:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.tab-button.active {
    background-color: var(--accent-color);
    color: white;
    box-shadow: 0 4px 12px rgba(98, 0, 238, 0.4);
}

.tab-button i {
    font-size: 1.2em;
}

/* Tab content should be scrollable but hide scrollbar */
.tab-content {
    flex: 1;
    overflow-y: auto;
    display: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.tab-content.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Student Code Checker Styles */
.code-checker-container {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    max-height: 100%;
    overflow-y: auto;
}

.code-input-section {
    margin-bottom: 30px;
}

.code-input-section h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5em;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.description {
    color: var(--muted-text);
    margin-bottom: 20px;
    font-size: 1em;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#student-code-input {
    width: 100%;
    height: 120px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    font-family: monospace;
    font-size: 1em;
    resize: none;
}

#student-code-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(98, 0, 238, 0.2);
}

.primary-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    max-width: 250px;
    align-self: flex-end;
}

.primary-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

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

#student-result-container {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    max-height: 100%;
    overflow-y: auto;
}

#student-result-container.visible {
    opacity: 1;
    transform: translateY(0);
}

.student-info-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.student-personal-info h3 {
    margin: 0 0 10px 0;
    color: var(--text-color);
    font-size: 1.5rem;
}

.student-personal-info p {
    margin: 5px 0;
    color: var(--muted-text);
}

.student-score-summary {
    text-align: center;
}

.student-score {
    width: 100px;
    height: 100px;
    background-color: var(--card-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.student-score.pass {
    color: var(--correct-color);
    border: 3px solid var(--correct-color);
}

.student-score.fail {
    color: var(--incorrect-color);
    border: 3px solid var(--incorrect-color);
}

.status.pass {
    color: var(--correct-color);
    font-weight: bold;
}

.status.fail {
    color: var(--incorrect-color);
    font-weight: bold;
}

.exam-metadata {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding: 15px;
    background-color: var(--secondary-bg);
    border-radius: 10px;
}

.exam-metadata p {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    color: var(--muted-text);
}

.exam-metadata i {
    color: var(--accent-color);
}

.gemini-analysis {
    margin-bottom: 30px;
    padding: 20px;
    background-color: var(--secondary-bg);
    border-radius: 10px;
    border-left: 5px solid var(--accent-color);
}

.gemini-analysis h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 1.3rem;
}

.gemini-analysis p {
    margin: 10px 0;
    line-height: 1.6;
}

.gemini-note {
    font-size: 0.9rem;
    color: var(--muted-text);
    font-style: italic;
    margin-top: 15px !important;
}

.answers-header {
    margin: 25px 0 15px 0;
    color: var(--text-color);
    font-size: 1.3rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.answers-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 25px;
    overflow-x: auto;
}

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

.answers-table th {
    background-color: var(--card-bg);
    color: var(--text-color);
    font-weight: 600;
}

.answers-table tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.1);
}

.correct-row {
    background-color: rgba(3, 218, 198, 0.1) !important;
}

.incorrect-row {
    background-color: rgba(207, 102, 121, 0.1) !important;
}

.correct-cell {
    color: var(--correct-color);
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 5px;
}

.incorrect-cell {
    color: var(--incorrect-color);
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 5px;
}

.status-required-badge {
    background-color: var(--required-color);
    color: white;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.8rem;
    margin-left: 5px;
}

.text-answer-display {
    max-height: 150px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid var(--border-color);
    background-color: var(--secondary-bg);
    border-radius: 5px;
    white-space: pre-wrap;
    font-size: 0.9em;
}

.student-result-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-top: 30px;
}

.student-result-actions button {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.student-result-actions button:hover {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.banned-student-notice {
    background-color: rgba(207, 102, 121, 0.1);
    border: 2px solid var(--incorrect-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
    text-align: center;
}

.banned-student-notice i {
    font-size: 2.5rem;
    color: var(--incorrect-color);
    margin-bottom: 15px;
}

.banned-student-notice h3 {
    color: var(--incorrect-color);
    margin-bottom: 15px;
}

.banned-student-notice p {
    margin-bottom: 0;
    font-weight: 500;
}

.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
}

.loading-spinner {
    border: 5px solid var(--border-color);
    border-radius: 50%;
    border-top: 5px solid var(--accent-color);
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--muted-text);
    font-size: 1.1rem;
}

/* Score Board Styling */
.score-board {
    background-color: var(--card-bg);
    padding: 20px 25px;
    border-radius: 12px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.score-board:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

#realtime-score {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

#realtime-score .score-value,
#realtime-score .score-total,
#realtime-score .score-percentage {
    color: var(--accent-color); 
    text-shadow: 0 0 8px rgba(98, 0, 238, 0.4);
}

#progress-indicator {
    font-size: 1.1em;
    color: var(--text-color);
    margin: 10px 0;
    font-weight: 500;
}

#pass-fail-status {
    font-size: 1.3em;
    font-weight: bold;
    min-height: 1.5em;
    letter-spacing: 0.5px;
    transition: all 0.5s ease;
    margin-top: 15px;
    padding: 10px;
    border-radius: 8px;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

#pass-fail-status.pass {
    color: white;
    background-color: rgba(3, 218, 198, 0.3);
    border-left: 4px solid var(--pass-color);
}

#pass-fail-status.fail {
    color: white;
    background-color: rgba(207, 102, 121, 0.3);
    border-left: 4px solid var(--fail-color);
}

.legend {
    background-color: var(--card-bg);
    padding: 18px;
    margin-bottom: 30px;
    border-radius: 12px;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.legend strong {
    display: block;
    margin-bottom: 10px;
    font-size: 1.1em;
    font-weight: 700;
    color: var(--text-color);
}

.legend span {
    display: inline-block;
    margin-right: 15px;
    margin-bottom: 8px;
    vertical-align: middle;
}

.legend input[type="radio"] {
   margin-right: 5px;
   vertical-align: middle;
   accent-color: var(--accent-color);
}

/* Question Item Styling */
#quiz-form {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Test action buttons */
.test-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    justify-content: center;
}

.test-actions button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95em;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.test-actions button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

.test-actions button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.question-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px 30px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.question-item:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    transform: translateY(-3px);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.question-number {
    font-weight: 700;
    font-size: 1.1em;
    color: var(--accent-color);
    text-shadow: 0 0 5px rgba(98, 0, 238, 0.3);
}

.question-status {
    font-size: 0.9em;
    padding: 5px 10px;
    border-radius: 6px;
    background-color: var(--secondary-bg);
    color: var(--muted-text);
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.question-status.status-required {
    background-color: var(--required-color);
    color: white;
    font-weight: bold;
    box-shadow: 0 2px 6px rgba(207, 102, 121, 0.4);
}

.question-text {
    font-weight: 700;
    margin-bottom: 15px;
    font-size: 1.1em;
    line-height: 1.5;
    color: var(--text-color);
}

.correct-answer {
    background-color: rgba(3, 218, 198, 0.1);
    border: 1px dashed rgba(3, 218, 198, 0.3);
    padding: 12px 18px;
    margin-bottom: 22px;
    font-size: 0.95em;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.correct-answer:hover {
    background-color: rgba(3, 218, 198, 0.15);
    border-color: rgba(3, 218, 198, 0.4);
}

.correct-answer strong {
    display: block;
    margin-bottom: 8px;
    color: var(--correct-color);
    font-weight: 600;
}

.assessment-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.assessment-options label {
    display: block;
    background-color: var(--secondary-bg);
    padding: 12px 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95em;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.assessment-options input[type="radio"] {
    margin-right: 8px;
    vertical-align: middle;
    accent-color: var(--accent-color);
}

.assessment-options label:hover {
    background-color: rgba(98, 0, 238, 0.1);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Selected answer styling */
.assessment-options input[type="radio"]:checked + label {
    background-color: rgba(98, 0, 238, 0.2);
    border-color: var(--accent-color);
    font-weight: 600;
    color: var(--text-color);
    box-shadow: 0 0 12px rgba(98, 0, 238, 0.3);
}

.assessment-options label::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(200, 200);
        opacity: 0;
    }
}

.assessment-options input[type="radio"]:checked + label::after {
    animation: ripple 0.6s ease-out;
}

.assessment-options input[value="correct"]:checked + label {
    background-color: rgba(3, 218, 198, 0.2);
    border-color: var(--correct-color);
    box-shadow: 0 0 12px rgba(3, 218, 198, 0.3);
}

.assessment-options input[value="partial"]:checked + label {
    background-color: rgba(255, 179, 0, 0.2);
    border-color: var(--partial-color);
    box-shadow: 0 0 12px rgba(255, 179, 0, 0.3);
}

.assessment-options input[value="incorrect"]:checked + label,
.assessment-options input[value="not_asked"]:checked + label {
    background-color: rgba(207, 102, 121, 0.2);
    border-color: var(--incorrect-color);
    box-shadow: 0 0 12px rgba(207, 102, 121, 0.3);
}

.assessment-options input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    animation: ripple 0.8s ease-out;
    pointer-events: none;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .quiz-container {
        /* Remove restrictive height and overflow */
        /* height: calc(100vh - 20px); */
        padding: 15px;
        margin: 0;
        border-radius: 8px;
    }
    
    .assessment-options { 
        grid-template-columns: 1fr; 
    }
    .test-actions {
        flex-direction: column;
        align-items: center;
    }
    .test-actions button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    h1 { 
        font-size: 1.6em; 
    }
    .quiz-container { 
        padding: 15px; 
    }
    .legend span { 
        display: block; 
        margin-right: 0; 
        margin-bottom: 8px;
    }
    .question-item { 
        padding: 15px; 
    }
    #realtime-score { 
        font-size: 1.2em;
    }
}

.selection-highlight {
    animation: highlight-pulse 0.8s ease-out;
}

@keyframes highlight-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(98, 0, 238, 0.5);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(98, 0, 238, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(98, 0, 238, 0);
    }
}

.answer-selected {
    animation: selected-pulse 0.5s ease-out;
}

@keyframes selected-pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

/* Fancy Checkbox Styling */
.assessment-options label {
    padding-left: 40px;
    position: relative;
}

.assessment-options label:before {
    content: '';
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    background-color: transparent;
    transition: all 0.3s ease;
}

.assessment-options label:hover:before {
    border-color: var(--accent-color);
}

.assessment-options input[type="radio"]:checked + label:before {
    border-color: var(--accent-color);
    background-color: var(--accent-color);
    box-shadow: 0 0 5px var(--accent-color);
}

.assessment-options input[value="correct"]:checked + label:before {
    border-color: var(--correct-color);
    background-color: var(--correct-color);
    box-shadow: 0 0 5px var(--correct-color);
}

.assessment-options input[value="partial"]:checked + label:before {
    border-color: var(--partial-color);
    background-color: var(--partial-color);
    box-shadow: 0 0 5px var(--partial-color);
}

.assessment-options input[value="incorrect"]:checked + label:before,
.assessment-options input[value="not_asked"]:checked + label:before {
    border-color: var(--incorrect-color);
    background-color: var(--incorrect-color);
    box-shadow: 0 0 5px var(--incorrect-color);
}

.assessment-options input[type="radio"]:checked + label:after {
    content: '';
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: white;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    background-color: var(--secondary-bg);
    border-radius: 10px;
    margin: 10px 0;
    height: 10px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
    border-radius: 10px;
    transition: width 0.6s ease;
    box-shadow: 0 0 8px var(--accent-color);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(30deg);
    background-color: var(--accent-color);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--primary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

/* Category styling */
.category-container {
    margin-bottom: 30px;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    margin: 30px 0 15px 0;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
    overflow: hidden;
    position: relative;
}

.category-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
}

.category-container:nth-child(1) .category-header::before {
    background: var(--uk-color);
}

.category-container:nth-child(2) .category-header::before {
    background: var(--ak-dk-color);
}

.category-container:nth-child(3) .category-header::before {
    background: var(--laws-color);
}

.category-container:nth-child(4) .category-header::before {
    background: var(--pk-color);
}

.category-header h2 {
    margin: 0;
    font-size: 1.4em;
    color: var(--text-color);
    font-weight: 600;
}

.category-count {
    font-size: 0.9em;
    background: var(--accent-color);
    color: white;
    padding: 3px 12px;
    border-radius: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.category-container:nth-child(1) .category-count {
    background: var(--uk-color);
}

.category-container:nth-child(2) .category-count {
    background: var(--ak-dk-color);
}

.category-container:nth-child(3) .category-count {
    background: var(--laws-color);
}

.category-container:nth-child(4) .category-count {
    background: var(--pk-color);
}

.category-questions {
    display: flex;
    flex-direction: column;
    gap: 25px;
    padding-left: 20px;
    border-left: 2px dashed var(--border-color);
    margin-left: 10px;
}

.category-badge {
    font-size: 0.75em;
    padding: 3px 8px;
    border-radius: 4px;
    color: white;
    margin-left: auto;
    margin-right: 10px;
}

.question-item[data-category="Уголовный кодекс"] .category-badge {
    background: var(--uk-color);
}

.question-item[data-category="Административный + Дорожный кодексы"] .category-badge {
    background: var(--ak-dk-color);
}

.question-item[data-category="Законы"] .category-badge {
    background: var(--laws-color);
}

.question-item[data-category="Процессуальный кодекс"] .category-badge {
    background: var(--pk-color);
}

/* Result code sharing */
.share-result-container {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.share-result-container:hover {
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

.code-header {
    margin-bottom: 15px;
}

.code-header h3 {
    margin: 0 0 10px 0;
    color: var(--text-color);
    font-weight: 600;
}

.code-description {
    font-size: 0.9em;
    color: var(--muted-text);
}

.code-display {
    display: flex;
    margin-bottom: 15px;
}

#result-code {
    flex: 1;
    background: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    font-family: monospace;
    resize: none;
    height: 60px;
}

#copy-code {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    margin-left: 10px;
    padding: 0 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#copy-code:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

#copy-code.copied {
    background: var(--correct-color);
}

.code-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

#share-link {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#share-link:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.code-input-container {
    display: flex;
    flex: 1;
}

#code-input {
    flex: 1;
    background: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px 0 0 8px;
    padding: 10px;
}

#load-code {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 0 8px 8px 0;
    padding: 0 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#load-code:hover {
    background: var(--accent-hover);
}

.loaded-code-info {
    margin-top: 15px;
    padding: 15px;
    background: rgba(98, 0, 238, 0.1);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.loaded-answer {
    animation: loaded-pulse 1s ease;
}

@keyframes loaded-pulse {
    0% {
        background-color: var(--card-bg);
    }
    50% {
        background-color: rgba(98, 0, 238, 0.2);
    }
    100% {
        background-color: var(--card-bg);
    }
}

/* Category Navigation */
.category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
    justify-content: center;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.cat-nav-item {
    background: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cat-nav-item:hover {
    background-color: rgba(98, 0, 238, 0.1);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.cat-nav-item.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    box-shadow: 0 2px 8px rgba(98, 0, 238, 0.4);
}

.cat-nav-item:nth-child(2).active {
    background-color: var(--uk-color);
    border-color: var(--uk-color);
}

.cat-nav-item:nth-child(3).active {
    background-color: var(--ak-dk-color);
    border-color: var(--ak-dk-color);
}

.cat-nav-item:nth-child(4).active {
    background-color: var(--laws-color);
    border-color: var(--laws-color);
}

.cat-nav-item:nth-child(5).active {
    background-color: var(--pk-color);
    border-color: var(--pk-color);
}

@media (max-width: 768px) {
    .category-nav {
        flex-direction: column;
        padding: 10px;
    }
    
    .cat-nav-item {
        width: 100%;
        justify-content: center;
    }
}

/* Floating Share Button */
.floating-share-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s ease;
}

.floating-share-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.floating-share-button.active {
    background-color: var(--correct-color);
    transform: rotate(45deg);
}

.share-result-container {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.share-result-container.visible {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: slideIn 0.4s ease;
}

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

@media (max-width: 768px) {
    .floating-share-button {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 1.2em;
    }
}

.toggle-category {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.1em;
    cursor: pointer;
    padding: 5px;
    margin-left: 15px;
    transition: all 0.3s ease;
}

.toggle-category:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.category-questions.collapsed {
    display: none;
}

.category-header {
    cursor: pointer;
}

.progress-detail {
    font-size: 0.95em;
    color: var(--muted-text);
    margin: 8px 0;
    padding: 5px 10px;
    border-radius: 6px;
    background-color: rgba(0, 0, 0, 0.1);
    display: inline-block;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.required-progress {
    border-left: 3px solid var(--required-color);
}

.optional-progress {
    border-left: 3px solid var(--accent-color);
}

.action-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95em;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.action-button i {
    margin-right: 8px;
}

.action-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

.action-button:active, .action-button.button-clicked {
    transform: translateY(1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.unanswered-highlight {
    animation: unanswered-pulse 2s ease infinite;
    box-shadow: 0 0 15px rgba(207, 102, 121, 0.6);
    border: 2px solid var(--incorrect-color) !important;
}

@keyframes unanswered-pulse {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
    100% {
        transform: translateY(0);
    }
}

.exam-timer {
    font-size: 1.1em;
    color: var(--accent-color);
    font-weight: 600;
    margin: 12px 0;
    padding: 8px 15px;
    background-color: rgba(98, 0, 238, 0.1);
    border-radius: 8px;
    display: inline-block;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    animation: timer-pulse 2s infinite ease-in-out;
}

.exam-timer i {
    margin-right: 6px;
    animation: timer-icon-spin 2s infinite linear;
}

@keyframes timer-pulse {
    0%, 100% {
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }
    50% {
        box-shadow: 0 2px 8px rgba(98, 0, 238, 0.4);
    }
}

@keyframes timer-icon-spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.print-report-btn {
    background-color: #4caf50;
    margin-top: 10px;
}

.print-report-btn:hover {
    background-color: #388e3c;
}

.print-report-btn i {
    animation: printer-anim 2s infinite;
}

@keyframes printer-anim {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-3px);
    }
}

.clear-progress-btn {
    background-color: #f44336;
    margin-bottom: 30px;
}

.clear-progress-btn:hover {
    background-color: #d32f2f;
}

.toggle-switch {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.toggle-switch label {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    margin-right: 10px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--accent-color);
}

input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

.toggle-label {
    font-size: 0.9em;
    color: var(--text-color);
}

.auto-save-notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 14px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.auto-save-notification.show {
    opacity: 1;
    transform: translateY(0);
}

.filter-notification {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 14px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.filter-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* Filter Container Styles */
.filter-container {
    background-color: var(--card-bg);
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.filter-option {
    display: flex;
    align-items: center;
}

.filter-option input[type="checkbox"] {
    accent-color: var(--accent-color);
    width: 18px;
    height: 18px;
    margin-right: 10px;
}

.filter-option label {
    font-size: 1em;
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
}

.filter-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--accent-color);
    color: white;
    padding: 12px 25px;
    border-radius: 10px;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: transform 0.3s ease-out;
    text-align: center;
}

.filter-notification.show {
    transform: translateX(-50%) translateY(0);
}

/* Responsive adjustments */
@media (max-height: 700px) {
    .quiz-container {
        padding: 10px 20px;
    }
    
    h1 {
        margin-top: 5px;
        margin-bottom: 2px;
        font-size: 1.8em;
    }
    
    .author {
        margin-bottom: 10px;
    }
    
    .mode-tabs {
        margin-bottom: 10px;
    }
}