/* Общие стили */
:root {
    --primary-color: #4285f4;
    --primary-hover: #3367d6;
    --secondary-color: #f1f3f4;
    --secondary-hover: #e0e0e0;
    --danger-color: #ea4335;
    --danger-hover: #d33426;
    --text-color: #202124;
    --border-color: #dadce0;
    --bg-color: #ffffff;
    --settings-bg: #f8f9fa;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    background-color: #f5f5f5;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Модальное окно выбора типа вопроса */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.modal-content h3 {
    margin-bottom: 20px;
    text-align: center;
}

.question-type-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.question-type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: white;
    cursor: pointer;
    transition: all 0.2s;
    height: 100%;
}

.question-type-btn:hover {
    background-color: var(--secondary-color);
    border-color: var(--primary-color);
}

.question-type-btn .material-icons {
    font-size: 36px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Основное разделение экрана */
.main-split-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.content-split-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.edit-panel {
    flex: 0 0 40%;
    padding: 20px;
    overflow-y: auto;
    background-color: var(--bg-color);
    border-right: 1px solid var(--border-color);
}

.preview-panel {
    flex: 1;
    position: relative;
    overflow-y: auto;
    background-color: var(--bg-color);
}

.preview-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.preview-content {
    position: relative;
    z-index: 1;
    padding: 20px;
    min-height: 100%;
}

/* Разделители */
.horizontal-splitter {
    height: 10px;
    background-color: var(--border-color);
    cursor: row-resize;
    transition: background-color 0.2s;
    flex-shrink: 0;
}

.horizontal-splitter:hover {
    background-color: var(--primary-color);
}

.vertical-splitter {
    width: 10px;
    background-color: var(--border-color);
    cursor: col-resize;
    transition: background-color 0.2s;
    flex-shrink: 0;
}

.vertical-splitter:hover {
    background-color: var(--primary-color);
}

/* Форма редактирования */
.question-controls {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 10px;
}

.nav-button {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    transition: all 0.2s;
}

.nav-button:hover {
    background-color: var(--secondary-color);
}

.nav-button.danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.nav-button.danger:hover {
    background-color: var(--danger-color);
    color: white;
}

.nav-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#questionCounter {
    font-weight: 500;
    margin: 0 10px;
    flex-grow: 1;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea.form-control {
    min-height: 80px;
    resize: vertical;
}

.answers-textarea {
    min-height: 120px;
    white-space: pre;
}

.match-fields {
    margin-top: 15px;
}

/* Кнопки */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
}

/* Панель настроек */
.settings-panel {
    flex: 0 0 300px;
    border-top: 1px solid var(--border-color);
    background-color: var(--settings-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.settings-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.settings-tab {
    padding: 12px 16px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.2s;
}

.settings-tab:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.settings-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.settings-content {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.settings-section {
    display: none;
}

.settings-section.active {
    display: block;
}

/* Цветовые пикеры */
.color-picker-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 5px;
}

.color-picker-group input[type="color"] {
    width: 40px;
    height: 30px;
    padding: 2px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.color-picker-group input[type="text"] {
    flex: 1;
    min-width: 0;
    padding: 6px 8px;
    font-size: 13px;
}

.btn-transparent {
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--secondary-color);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-transparent:hover {
    background-color: var(--secondary-hover);
}

.btn-link {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    transition: all 0.2s;
}

.btn-link:hover {
    background-color: var(--secondary-color);
}

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

/* Аккордеон настроек */
.style-accordion {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 15px;
    overflow: hidden;
}

.accordion-header {
    padding: 12px 15px;
    background-color: var(--secondary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

.accordion-header h3 {
    font-size: 15px;
    font-weight: 500;
    margin: 0;
}

.accordion-content {
    padding: 15px;
    background-color: white;
}

/* Предпросмотр вопросов */
.question-preview {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

.question-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 5px;
}

.question-number {
    min-width: 30px;
    padding: 5px;
    text-align: center;
    margin-right: 10px;
    border: 2px solid #000;
    border-radius: 4px;
    font-weight: bold;
    background-color: #fff;
}

.question-text {
    flex: 1;
    padding: 10px;
    border: 1px solid #000;
    border-radius: 5px;
    background-color: #fff;
}

.answers-preview {
    margin-left: 20px;
}

.answer-preview {
    margin-bottom: 5px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    background-color: #f0f0f0;
}

/* Стили для типа вопроса "Сопоставить" */
.match-columns {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

.match-column {
    flex: 1;
}

.match-item {
    margin-bottom: 5px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    background-color: #f0f0f0;
}

/* Стили для типа вопроса "Решить пример" */
.solve-example {
    margin-bottom: 10px;
}

.answer-field {
    min-height: 30px;
    border: 1px dashed #999;
    border-radius: 4px;
    margin-top: 5px;
}

/* Предпросмотр экспорта */
.export-preview-container {
    margin: 15px 0;
}

.export-preview {
    border: 1px dashed var(--border-color);
    margin-top: 5px;
    overflow: hidden;
    position: relative;
    background-color: white;
    background-image: 
        linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee),
        linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.export-preview img {
    max-width: 100%;
    max-height: 200px;
    object-fit: contain;
}

/* Адаптивность */
@media (max-width: 768px) {
    .content-split-container {
        flex-direction: column;
    }
    
    .edit-panel, .preview-panel {
        flex: none;
        height: 50%;
    }
    
    .vertical-splitter {
        width: 100%;
        height: 10px;
        cursor: row-resize;
    }
    
    .settings-panel {
        height: 250px;
    }

    .question-type-options {
        grid-template-columns: 1fr;
    }
    #changeType {
    margin-left: auto;
    margin-right: 10px;
    }

    #changeType .material-icons {
    font-size: 20px;
    }
  
}