/* css/task.css - Обновленная версия */

/* ============================================================
   СТИЛИ ДЛЯ СТРАНИЦЫ С ЗАДАНИЕМ
   ============================================================ */

.task-wrapper {
    display: flex;
    gap: 30px;
    max-width: 1200px;
    margin: 24px auto 40px;
    padding: 0 24px;
    align-items: flex-start;
}

/* ---- ЛЕВАЯ КОЛОНКА ---- */
.task-sidebar {
    flex: 0 0 320px;
    position: sticky;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding-right: 8px;
}

.task-sidebar .breadcrumbs {
    margin-bottom: 14px;
    font-size: 0.8rem;
}

.task-info {
    padding: 20px 0 16px;
}

.task-badge {
    display: inline-block;
    background: var(--bg-canvas);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 400;
    margin-bottom: 10px;
}
.task-badge a {
    display: inline-block;
    padding: 2px 5px;
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    transition: all 0.3s ease;
}
.task-badge a:hover {
    color: var(--text-secondary);
}
.task-info h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.text-bold {
    font-weight: 500;
}
.task-info > p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 12px;
}

/* ---- ИНСТРУМЕНТЫ ---- */
.task-tools {
    padding: 16px 0;
   
}

.task-tools h4, .gallery-metod h4 {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.tools-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.tools-header h4 {
    margin-bottom: 0;
}

.tools-header-icons {
    display: flex;
    align-items: center;
    gap: 6px;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 0.95rem;
    padding: 4px 6px;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
    line-height: 1;
}

.icon-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface);
}

.icon-btn.active {
    color: var(--accent-orange);
}

.tool-hint {
    position: relative;
    opacity: 0;
    transition: opacity 0.3s;
    padding: 12px;
    background: var(--border-light);
    border-radius: 6px;
    margin-top: 8px;
    min-height: 120px;
}

.tool-hint .hint-text {
    display: block;
    line-height: 1.5;
}

.tool-hint.visible {
    opacity: 1;
}

.tool-hint.error {
    background: var(--bg-base);
    color: var(--accent-danger);
    opacity: 1;
}

.construction-plan {
    margin-top: 10px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    min-height: 20px;
}

.construction-step {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 3px 0;
    border-bottom: 1px dashed var(--border-light);
}

.construction-step-text {
    flex: 1;
}

/* ---- КНОПКИ ДЕЙСТВИЙ ---- */
.task-actions {
    padding: 16px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-primary {
    padding: 12px 24px;
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

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

.btn-secondary {
    padding: 10px 20px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.btn-secondary:hover {
    background: var(--bg-surface);
    border-color: var(--border-focus);
}

/* ---- ПРАВАЯ КОЛОНКА (ЧЕРТЕЖ) ---- */
.task-canvas {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 100%;
}

.canvas-wrapper {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    overflow: hidden;
    padding: 4px;
    position: relative;
    min-width: 0;
    max-width: 100%;
}

/* ===== БАЗОВЫЕ СТИЛИ SVG (остальное через JS) ===== */
.task-svg {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.edge {
    stroke: var(--text-secondary);
    stroke-width: 2.5;
    cursor: pointer;
    transition: stroke-width 0.2s, opacity 0.2s;
}
.edge-dashed {
    stroke: var(--text-secondary);
    stroke-width: 2.5;
    stroke-dasharray: 8, 6!important;
    cursor: pointer;
    transition: stroke-width 0.2s, opacity 0.2s;
}
.vertex {
    fill: var(--text-secondary);
}

.vertex-label {
    fill: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    font-family: 'Times New Roman', serif;
    text-anchor: middle;
    dominant-baseline: central;
    /* Halo-эффект: светлая обводка, отрисованная позади текста,
       делает подпись читаемой даже при пересечении с линиями */
    stroke: var(--bg-base);
    stroke-width: 3px;
    stroke-linecap: round;
    stroke-linejoin: round;
    paint-order: stroke fill;
}

.point-given {
    cursor: pointer;
    transition: stroke-width 0.2s, stroke 0.2s;
}

.point-given.selected {
    stroke-width: 4;
    stroke: var(--accent-orange);
}

.line-user {
    stroke-linecap: round;
    cursor: pointer;
    transition: stroke-width 0.2s, opacity 0.2s;
}

.intersection-point {
    fill: var(--accent-red);
    stroke: white;
    stroke-width: 2;
    cursor: pointer;
    transition: opacity 0.2s, r 0.2s;
}

.intersection-point.hidden {
    opacity: 0;
    pointer-events: none;
}

/* ===== УПРАВЛЕНИЕ SVG ===== */
.svg-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 8px;
    z-index: 100;
}

.control-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    background: var(--bg-base);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 16px;
}

.control-btn:hover {
    background: var(--border-light);
}

.control-btn.active {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

.eraser-btn.active {
    background: var(--accent-chart);
    border-color: var(--accent-chart);
}

/* ============================================================
   АДАПТИВ
   ============================================================ */

@media (max-width: 992px) {
    .task-wrapper {
        flex-direction: column;
        padding: 0 16px;
        margin-top: 20px;
    }
    .top-message {
        font-size: 10px;
        width: 100%;
    }
    .task-sidebar {
        flex: none;
        width: 100%;
        position: static;
        max-height: none;
        padding-right: 0;
    }

    .task-actions {
        flex-direction: row;
        width: 100%;
    }

    .task-actions .btn-primary,
    .task-actions .btn-secondary {
        flex: 1;
        min-width: 120px;
    }
    .task-canvas,
    .canvas-wrapper,
    .svg-viewport {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .task-canvas {
        position: static;
    }
}

@media (max-width: 480px) {
    .task-wrapper {
        padding: 0 10px;
        margin-top: 10px;
    }

    .task-info h2 {
        font-size: 1.2rem;
    }



    .task-actions .btn-primary,
    .task-actions .btn-secondary {
        flex: none;
        width: 100%;
    }
}
/* Добавьте эти стили в секцию <style> внутри SVG или в CSS файл */
.section-polygon {
    fill: rgba(146, 144, 195, 0.2);
    stroke: none;
    stroke-width: 2.5;
    pointer-events: none;
    transition: opacity 0.5s ease-in-out;
}

@keyframes pulse {
    0% {
        stroke-width: 2.5;
        fill-opacity: 0.2;
    }
    50% {
        stroke-width: 4;
        fill-opacity: 0.35;
    }
    100% {
        stroke-width: 2.5;
        fill-opacity: 0.2;
    }
}
.planes-row {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.plane-column {
    flex: 1;
    border: 0;
    border-radius: 5px;
    padding: 8px;
    transition: background-color 0.3s, border-color 0.3s;
}

/* Обновляем стили для постоянной подсветки */
.planes-row {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.plane-column {
    flex: 1;
    border-radius: 5px;
    padding: 8px;
    transition: background-color 0.3s, border-color 0.3s;
}

/* Постоянная подсветка для плоскостей с отрезками */
.plane-column.has-segments {
    background-color: rgba(146, 144, 195, 0.1);
}

/* Анимация при добавлении нового отрезка */
.plane-column.just-highlighted {
    animation: highlight-pulse 2s ease-in-out;
}

.plane-header {
    font-weight: 700;
    text-align: center;
    margin-bottom: 5px;
    color: #2c3e50;
}

.plane-points, .plane-segments {
    font-size: 12px;
    margin: 2px 0;
}

.plane-points .label, .plane-segments .label {
    font-weight: 600;
    color: #7f8c8d;
}

.last-segment-info {
    font-size: 13px;
    color: var(--accent-green) !important;
    transition: opacity 0.5s;
}

@keyframes highlight-pulse {
    0% {
        background-color: rgba(146, 144, 195, 0.1);
    }
    50% {
        background-color: rgba(146, 144, 195, 0.35);
    }
    100% {
        background-color: rgba(146, 144, 195, 0.15);
    }
}
/* Добавьте в секцию <style> внутри SVG или в CSS файл */
@keyframes slideDown {
    0% {
        transform: translateX(-50%) translateY(-100%);
        opacity: 0;
    }
    100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

.section-complete-message {
    animation: slideDown 0.5s ease-out;
}
@keyframes slideDown {
    0% {
        transform: translateX(-50%) translateY(-100%);
        opacity: 0;
    }
    100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}
/* Стили для прогресс-бара */
.progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0;
    border-radius: 6px;
    margin-top: -5px;
}

.progress-bar {
    flex: 1;
    height: 5px;
    background-color: var(--border-light);
    border-radius: 0px 0px 6px 6px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--bg-progress);
    border-radius: 8px;
    transition: width 0.5s ease-in-out;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.3) 50%, 
        transparent 100%);
    animation: shimmer 2s infinite;
}

.smiley {
    font-size: 24px;
    min-width: 30px;
    text-align: center;
    display: none;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

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

/* Стили для кнопки подглядывания */
.hint-btn {
    /* Базовые стили будут скопированы с кнопки сброса */
    transition: all 0.3s ease;
}

.hint-btn.active {
    background-color: var(--btn-primary-bg) !important;
    color: white !important;
    border-color: var(--btn-primary-bg) !important;
}

.hint-btn:hover {
    opacity: 0.9;
}

.hint-btn:active {
    transform: scale(0.98);
}

/* Стили для ширмы */
.hint-overlay {
    border-radius: 8px;
    backdrop-filter: blur(2px);
}

/* ==== КАРТОЧКА РЕЗУЛЬТАТА (вместо конфетти) ==== */
.completion-card {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 500;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 24px 32px 20px;
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.3);
    text-align: center;
    min-width: 300px;
    max-width: 90%;
    animation: completion-pop 0.45s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

@keyframes completion-pop {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(0.85); }
    100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.completion-card .completion-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.completion-card .completion-stars {
    font-size: 1.6rem;
    line-height: 1;
    letter-spacing: 4px;
    color: var(--accent-chart);
    margin: 6px 0 2px;
    user-select: none;
}

.completion-card .completion-icon {
    color: var(--accent-chart);
}

.completion-card .completion-icon.dim {
    opacity: 0.28;
}

.completion-card .completion-comment {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.completion-card .completion-stats {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    line-height: 1.6;
    border-top: 1px dashed var(--border-light);
    padding-top: 10px;
}

.completion-card .completion-close {
    position: absolute;
    top: 8px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: color 0.2s, background 0.2s;
}

.completion-card .completion-close:hover {
    color: var(--text-primary);
    background: var(--border-light);
}

#section-info {
    display: none!important;
}










/* ===== PAN & ZOOM ===== */

.svg-viewport {
    position: relative;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    height: auto;
    aspect-ratio: 10 / 9;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 8px;
    background: var(--bg-base);
}



.svg-viewport .task-svg {
    width: 100%;
    height: auto;
    aspect-ratio: 10 / 9;
    display: block;
    transform-origin: center center;
    transition: transform 0.15s ease-out;
    will-change: transform;
}

/* Контролы поверх SVG */
.svg-viewport .svg-controls {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 100;
}

.svg-viewport .control-btn {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    background: var(--bg-base);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 14px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.svg-viewport .control-btn:hover {
    background: var(--border-light);
    transform: scale(1.05);
}

.svg-viewport .control-btn.active {
    background: var(--accent-chart);
    color: white;
    border-color: var(--accent-chart);
}

/* Индикатор масштаба */
.zoom-indicator {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 50;
}

.zoom-indicator.visible {
    opacity: 1;
}

/* Адаптив для мобильных */
@media (max-width: 768px) {
    .svg-viewport .control-btn {
        width: 44px;
        height: 44px;
        font-size: 16px;
    }
}
/* ============================================================
   КОНТРОЛЫ SVG — РАЗДЕЛЕННЫЕ ПО ЗОНАМ
   ============================================================ */

/* ---- КОНТРОЛЫ ВВЕРХУ СЛЕВА (СБРОС) ---- */
.svg-viewport .svg-controls-reset {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 101;
    pointer-events: none;
}

.svg-viewport .svg-controls-reset .control-btn {
    pointer-events: auto;
}

/* ---- КОНТРОЛЫ ВВЕРХУ СПРАВА (ИНСТРУМЕНТЫ) ---- */
.svg-viewport .svg-controls-top {
    position: absolute;
    bottom: 16px;
    left: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 100;
    pointer-events: none;
}

.svg-viewport .svg-controls-top .control-btn {
    pointer-events: auto;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--border-light);
    background: var(--bg-base);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 16px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(4px);
}

.svg-viewport .svg-controls-top .control-btn:hover {
    background: var(--border-light);
}

/* Кнопка ластика — скрыта по умолчанию */
.svg-viewport .svg-controls-top .eraser-btn {
    display: none !important;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

/* Когда видима */
.svg-viewport .svg-controls-top .eraser-btn.visible {
    display: flex !important;
    opacity: 1;
    pointer-events: auto;
    background: var(--bg-base) !important;
    border: 1px solid var(--border-light)!important;
}

/* Активный режим */
.svg-viewport .svg-controls-top .eraser-btn.active {
    color: white !important;
    background: var(--accent-chart) !important;
    border: 1px solid var(--accent-chart)!important;
}

.svg-viewport .svg-controls-top .eraser-btn.active:hover {
    background: var(--accent-chart) !important;
    opacity: 0.9;
}



/* ---- КОНТРОЛЫ ЗУМА ВНИЗУ СПРАВА ---- */
.svg-viewport .svg-controls-zoom {
    position: absolute;
    bottom: 16px;
    right: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 100;
    pointer-events: none;
}

.svg-viewport .svg-controls-zoom .control-btn {
    pointer-events: auto;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--border-light);
    background: var(--bg-base);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 16px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(4px);
}

.svg-viewport .svg-controls-zoom .control-btn:hover {
    background: var(--border-light);
    transform: scale(1.05);
}

.svg-viewport .svg-controls-zoom .control-btn:active {
    transform: scale(0.95);
}

/* Активная кнопка пана */
.svg-viewport .svg-controls-zoom .control-btn.active {
    background: var(--accent-chart);
    color: white;
    border-color: var(--accent-chart);
}

/* ===== ИНДИКАТОР МАСШТАБА ===== */
.zoom-indicator {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 50;
    backdrop-filter: blur(4px);
}

.zoom-indicator.visible {
    opacity: 1;
}

/* ===== АДАПТИВ ===== */
@media (max-width: 768px) {
    .svg-viewport .svg-controls-top .control-btn,
    .svg-viewport .svg-controls-zoom .control-btn {
        width: 48px;
        height: 48px;
        font-size: 18px;
    }
    
    .zoom-indicator {
        font-size: 12px;
        padding: 4px 12px;
    }
}

/* ===== ВЫБОР ЗАДАНИЯ ===== */
.task-selector {
    padding: 12px 0;
    border-top: 1px solid var(--border-light);
}

.task-selector label {
    display: block;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-bottom: 6px;
}

.task-select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    background: var(--bg-base);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.task-select:hover {
    border-color: var(--text-tertiary);
}

.task-select:focus {
    outline: none;
    border-color: var(--accent-chart);
    box-shadow: 0 0 0 3px rgba(146, 144, 195, 0.2);
    
}
/* ============================================================
   ГАЛЕРЕЯ ЗАДАНИЙ
   ============================================================ */

.task-gallery {
    max-width: 1200px;
    margin: 30px auto;
    padding: 20px 24px;
    border-top: 1px solid var(--border-light);
}

.gallery-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
}

.gallery-card {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 23px 8px 6px;
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
}


.gallery-card:hover {
    border-color: var(--text-tertiary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.gallery-card.active {
    border-color: var(--accent-chart);
    box-shadow: 0 0 0 3px rgba(146, 144, 195, 0.2);
}

.gallery-card .card-preview {
    width: 100%;
    aspect-ratio: 4/3;

    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.gallery-card .card-preview svg {
    width: 100%;
    height: 100%;
    display: block;
}

.gallery-card .card-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-tertiary);
    text-align: right;
    margin-top: 6px;
    padding: 3px 6px;
    border-radius: 4px;
    transition: all 0.25s ease;
}

.gallery-card .card-free {
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    line-height: 1.5;
    color: var(--accent-green);
    background: var(--bg-base);
    border: 1px solid var(--accent-green);
    border-radius: 6px;
    padding: 0 5px;
    flex: 0 0 auto;
}

.gallery-card.active .card-label {
    color: var(--accent-chart);
}

.gallery-card .card-badge {
    position: absolute;
    top: 10px;
    left: 7px;
    font-size: 0.5rem;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 8px;
    background: var(--bg-surface);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    z-index: 1;
}

.gallery-card .card-badge.easy {
    color: var(--accent-green);
    
}

.gallery-card .card-badge.medium {
    color: var(--accent-orange);
    
}

.gallery-card .card-badge.hard {
    color: var(--accent-danger);
    
}

.gallery-card .card-levels {
    position: absolute;
    top: 10px;
    right: 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    z-index: 5;
    pointer-events: none;
    user-select: none;
    opacity: 0;
    transform: scale(0.85);
    transform-origin: top right;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-card .card-levels.earned {
    opacity: 1;
    transform: scale(1);
}

.gallery-card .card-level {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    font-size: 12px;
    line-height: 1;
    letter-spacing: 1px;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.gallery-card .card-level i {
    display: inline-block;
    margin-left: 2px;
}

.gallery-card .card-level .dim-stars {
    opacity: 0.28;
}

.gallery-card .card-level.novice {
    color: #D4A373;
}

.gallery-card .card-level.expert {
    color: #D4A373;
}

.gallery-card .card-level.pro {
    color: #D4A373;
}

/* ===== АДАПТИВ ===== */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
    }
    
    .gallery-card .card-label {
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}
/* Внешние линии — серые и тонкие */
.line-user.external-point-line {
    stroke: var(--text-tertiary) !important;
    stroke-width: 2 !important;
    opacity: 0.6 !important;
}

.line-user.external-point-line.selected {
    stroke: var(--accent-orange) !important;
    stroke-width: 3.5 !important;
    opacity: 1 !important;
}

.line-user.external-point-line:hover {
    stroke: var(--accent-orange) !important;
    stroke-width: 3 !important;
    opacity: 0.9 !important;
}
/* ===== ТАБЫ УРОВНЯ СЛОЖНОСТИ ===== */
.level-tabs {
    display: flex;
    gap: 6px;
    padding: 12px 0 8px;
}

.level-tab {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    background: var(--bg-base);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: inherit;
}

.level-tab:hover {
    border-color: var(--text-tertiary);
    background: var(--bg-surface);
}

.level-tab.active {
    border-color: var(--accent-chart);
    background: var(--accent-chart);
    color: var(--bg-base);
}

.level-tab i {
    font-size: 0.9rem;
}

/* Адаптив */
@media (max-width: 480px) {
    .level-tab {
        font-size: 0.65rem;
        padding: 6px 8px;
    }
    .level-tab i {
        font-size: 0.7rem;
    }
}

/* ============================================================
   ПОДПИСКА И ОПЛАТА
   ============================================================ */
.task-wrapper {
    position: relative;
}

/* ---- Карточка задания с замком ---- */
.gallery-card.locked {
    cursor: default;
}
.gallery-card.locked:hover {
    border-color: var(--border-light);
    box-shadow: none;
}
.gallery-card.locked .card-preview {
    filter: blur(2px) saturate(0.7);
    opacity: 0.6;
}
.gallery-card .card-lock {
    position: absolute;
    top: calc(50% - 16px);
    left: 50%;
    transform: translate(-50%, -50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-base);
    color: var(--text-secondary);
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
    z-index: 6;
    pointer-events: none;
}

/* ---- Слой блокировки задания ---- */
.task-lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 400;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.25);
    -webkit-backdrop-filter: blur(7px);
    backdrop-filter: blur(7px);
    border-radius: 14px;
}
.task-lock-overlay.show {
    display: flex;
}
.task-lock-card {
    width: 100%;
    max-width: 380px;
    text-align: center;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 18px;
    padding: 32px 28px 26px;
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.2);
    animation: auth-pop 0.25s ease;
}
.task-lock-icon {
    width: 62px;
    height: 62px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: var(--bg-surface);
    color: var(--accent-chart);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.task-lock-card h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.task-lock-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 22px;
}

/* ---- Окно оплаты ---- */
.pay-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.55);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
    z-index: 5000;
}
.pay-overlay.open {
    display: flex;
}
.pay-modal {
    position: relative;
    width: 100%;
    max-width: 430px;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 28px 24px 22px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    animation: auth-pop 0.22s ease;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
}
.pay-modal-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 10px;
    border-radius: 50%;
    background: var(--bg-surface);
    color: var(--accent-chart);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pay-modal h2 {
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.pay-subtitle {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    margin-bottom: 16px;
}
.pay-offer {
    border: 1px solid var(--accent-chart);
    border-radius: 14px;
    background: var(--bg-canvas);
    padding: 16px 14px 14px;
    text-align: center;
    margin-bottom: 12px;
}
.pay-offer-head {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 6px;
}
.pay-offer-term {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 7px;
}
.pay-offer-term i {
    color: var(--accent-chart);
}
.pay-sale-badge {
    font-size: 0.62rem;
    font-weight: 800;
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
    background: var(--bg-base);
    border-radius: 8px;
    padding: 2px 7px;
    letter-spacing: 0.3px;
}
.pay-price-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 4px;
}
.pay-price-old {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-decoration: line-through;
}
.pay-price-now {
    font-size: 2.1rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--accent-chart);
}
.pay-offer-note {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.45;
    margin: 0 auto;
    max-width: 300px;
}
.pay-promo {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    text-align: left;
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
    background: var(--bg-surface);
    border: 1px dashed var(--border-light);
    border-radius: 10px;
    padding: 8px 10px;
    margin-bottom: 14px;
}
.pay-promo i {
    color: var(--accent-orange);
    margin-top: 1px;
}
.pay-promo strong {
    color: var(--text-primary);
    font-weight: 700;
}
.pay-qr {
    margin-bottom: 14px;
    border: 2px dashed var(--border-light);
    border-radius: 12px;
    padding: 22px 16px;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-tertiary);
    background: var(--bg-canvas);
}
.pay-qr i {
    font-size: 3.2rem;
    opacity: 0.55;
}
.pay-qr span {
    font-size: 0.82rem;
}
.pay-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    margin-bottom: 14px;
}
.pay-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
}
.pay-btn:hover {
    border-color: var(--text-tertiary);
    color: var(--text-primary);
}
.pay-btn-solid {
    width: 100%;
    border: none;
    padding: 14px;
    font-size: 1rem;
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
}
.pay-btn-solid:hover {
    background: var(--btn-primary-hover);
    color: var(--btn-primary-text);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}
.pay-btn.loading {
    opacity: 0.6;
    pointer-events: none;
}

@media (max-width: 480px) {
    .task-lock-card {
        padding: 26px 20px 22px;
    }
}

/* ============================================================
   3D-ТРЕНАЖЁРЫ С ПРОДЛЕНИЕМ ЛИНИЙ
   ============================================================ */
.promo-3d {
    max-width: 1200px;
    margin: 34px auto 10px;
    padding: 26px 24px 8px;
    border-top: 1px solid var(--border-light);
}

.promo-3d-title {
    text-align: center;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.promo-3d-desc {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 640px;
    margin: 0 auto 20px;
}

.promo-3d-grid {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    padding: 0 0 14px;
}

.promo-3d-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 240px;
    padding: 26px 18px 18px;
    background: var(--bg-base);
    border: 2px solid var(--border-light);
    border-radius: 14px;
    text-decoration: none;
    transition: all 0.25s ease;
}

a.promo-3d-card:hover {
    border-color: var(--border-focus);
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
}

.promo-3d-card img {
    width: 150px;
    height: auto;
    display: block;
    margin-bottom: 12px;
    border-radius: 6px;
}

.promo-3d-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 4px 9px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    line-height: 1.3;
}

.promo-3d-free {
    background: var(--accent-green);
    color: #ffffff;
    display: none;
}

.promo-3d-paid {
    background: var(--accent-chart);
    color: #ffffff;
}

.promo-3d-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.promo-3d-detail {
    margin-top: 5px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.45;
}

.promo-3d-card.promo-3d-locked {
    cursor: pointer;
    background: var(--bg-base);
    font-family: inherit;
    border: 2px solid var(--border-light);
}

.promo-3d-locked img {
    filter: blur(1px) saturate(0.75);
    opacity: 0.85;
}

.promo-3d-lock-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: var(--bg-base);
    color: var(--text-secondary);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.18);
    z-index: 3;
    pointer-events: none;
}

.promo-3d-locked:hover {
    border-color: var(--border-focus);
}

@media (max-width: 560px) {
    .promo-3d {
        padding: 24px 12px 6px;
    }
    .promo-3d-card {
        width: 100%;
        max-width: 300px;
    }
}

/* ============================================================
   ОКНО 3D-ПРЕВЬЮ (дублирует построения с 2D-холста)
   ============================================================ */
.preview3d-panel {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 200;
    display: none;
    width: 190px;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
    user-select: none;
    -webkit-user-select: none;
}

/* Кнопка повторного открытия 3D (появляется, когда окно закрыто) */
.svg-viewport .preview3d-reopen {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 210;
    display: none;
}

.preview3d-title {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 10px 5px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.preview3d-title i {
    color: var(--accent-chart);
}

.preview3d-subtitle {
    margin: -2px 12px 8px;
    font-size: 0.68rem;
    color: var(--text-tertiary);
    line-height: 1.2;
}

.preview3d-close {
    position: absolute;
    top: 5px;
    right: 6px;
    z-index: 3;
    width: 26px;
    height: 26px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-tertiary);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
    padding: 0;
}

.preview3d-close:hover {
    color: var(--text-primary);
    background: var(--border-light);
}

#preview3dCanvas {
    display: block;
    width: 100%;
    height: auto;
    cursor: grab;
    touch-action: none;
    background: var(--bg-base);
}

#preview3dCanvas:active {
    cursor: grabbing;
}

.preview3d-hint {
    padding: 4px 0 7px;
    text-align: center;
    font-size: 0.62rem;
    color: var(--text-tertiary);
    opacity: 0.8;
}

/* ===== Панель управления 3D-превью: прозрачность + цвет ===== */
.preview3d-tools {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 6px 10px;
}

/* Ползунок прозрачности и кнопка цвета — на одной строке */
.preview3d-tools-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview3d-tools-row .opacity-slider {
    flex: 1;
    min-width: 0;
    height: 6px;
    border-radius: 3px;
    background: var(--border-light);
    outline: none;
    -webkit-appearance: none;
}

.preview3d-tools-row .opacity-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--btn-primary-bg);
    cursor: pointer;
}

.preview3d-tools-row .opacity-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--btn-primary-bg);
    cursor: pointer;
}

.preview3d-color {
    position: relative;
}

.preview3d-color-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 3px 8px;
    cursor: pointer;
    color: var(--text-tertiary);
    font-size: 0.68rem;
}

.preview3d-color-btn:hover {
    border-color: var(--border-focus);
}

.preview3d-color-preview {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 1px solid var(--border-light);
}

.preview3d-palette-popup {
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
    padding: 8px;
    min-width: 176px;
}

.preview3d-palette-popup .color-palette {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.preview3d-palette-popup .color-option {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.preview3d-palette-popup .color-option:hover,
.preview3d-palette-popup .color-option.active {
    border-color: var(--border-focus);
    transform: scale(1.08);
}

/* На маленьких экранах — компактнее, чтобы не закрывать чертеж */
@media (max-width: 768px) {
    .preview3d-panel {
        width: 150px;
        top: 8px;
        right: 8px;
    }
    .preview3d-hint {
        display: none;
    }
    .preview3d-subtitle {
        display: none;
    }
    .preview3d-tools {
        padding: 4px 8px;
    }
    .preview3d-palette-popup {
        min-width: 0;
    }
    .preview3d-palette-popup .color-option {
        width: 24px;
        height: 24px;
    }
    .svg-viewport .preview3d-reopen {
        top: 8px;
        right: 8px;
    }
    .zoom-hint {
        display: none !important;
    }
}