.tools-panel {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 0px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;   /* ← ИСПРАВЛЕНО */
    overflow-x: hidden;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tools-panel::-webkit-scrollbar {
    width: 6px;
}

.tools-panel::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.tools-panel::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

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

.panel-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.panel-section h3 {
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

/* Другие фоны */
.other-backgrounds {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.other-backgrounds h4 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.bg-images-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

.bg-image-btn {
    background: none;
    border: 2px solid transparent;
    border-radius: 6px;
    padding: 0;
    cursor: pointer;
    overflow: hidden;
    aspect-ratio: 1;
    transition: all 0.2s;
}

.bg-image-btn img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 4px;
}

.bg-image-btn:hover {
    border-color: var(--accent-hover);
    transform: scale(1.05);
}

.bg-image-btn.active {
    border-color: var(--accent-hover);
    box-shadow: 0 0 6px var(--accent-shadow);
}

.canvas-selection-menu {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 1000;   /* выше любой панели */
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 8px;
    display: flex;
    gap: 8px;
    box-shadow: var(--shadow);
}

.selection-mode-menu {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.selection-mode-btn {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    border-radius: 6px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.selection-mode-btn i {
    font-size: 18px;
}

.selection-mode-btn:hover,
.selection-mode-btn.active {
    background: var(--accent);
    color: white;
    border-color: transparent;
}

.tool-btn {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    width: 100%;
    height: 48px; /* Фиксированная высота вместо aspect-ratio */
    border-radius: 6px;
    cursor: pointer;
    font-size: 20px; /* Увеличиваем размер иконок */
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.tool-btn i {
    font-size: 22px; /* Размер иконок */
}

.tool-btn:hover {
    background: #3d3d3d;
}

.tool-btn.active {
    background: var(--accent);
    color: white;
}

.tool-btn.active i {
    color: white;
}

.tool-btn.active[data-tool="fill"],
.tool-btn.active[data-tool="fill"] i {
    color: white;
    text-shadow: 0 0 2px rgba(0,0,0,0.5);
}

.tool-btn.active i {
    transform: rotate(5deg);
    transition: transform 0.2s ease;
}

.tool-btn[data-tool="fill"].active i {
    transform: rotate(20deg);
}
.tool-btn[data-tool="pencil"].active i {
    transform: rotate(10deg);
}

.shape-btn[data-tool="triangle"] i {
    transform: rotate(-90deg);
    display: inline-block;
}

.shape-btn[data-tool="triangle"]:active i {
    transform: scale(1.05) !important;
    transition: transform 0.1s cubic-bezier(0.2, 0.9, 0.4, 1.2);
}

/* Анимация возврата */
.shape-btn[data-tool="triangle"] i {
    transition: transform 0.12s ease;
}

.tool-btn:active i,
.tool-btn:active img,
.shape-btn:active i,
.shape-btn:active img {
    transform: rotate(15deg) scale(1.05);
    transition: transform 0.1s cubic-bezier(0.2, 0.9, 0.4, 1.2);
}

/* Плавный возврат */
.tool-btn i,
.tool-btn img,
.shape-btn i,
.shape-btn img {
    transition: transform 0.12s ease;
    display: inline-block;
}

.panel-footer {
    padding: 12px 16px;
    display: flex;
    justify-content: center;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.panel-toggle-btn {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 13px;
}

.panel-toggle-btn:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-1px);
}

.tools-panel.collapsed-panel {
    width: 1px;
}

.tools-panel.collapsed-panel .tool-text,
.tools-panel.collapsed-panel .panel-header h3 {
    display: none !important;
}

.tools-panel.collapsed-panel .tool-btn {
    justify-content: center;
    padding: 8px 0;
}

.tools-panel.collapsed-panel .panel-section {
    display: none;
}

.left-panel-tail {
    position: fixed;
    left: 260px; /* Прижата к открытой панели */
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 50px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: none; /* Чтобы сливалась с краем экрана */
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
    cursor: pointer;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1), background 0.2s;
}

.left-panel-tail:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.left-panel-tail i {
    transition: transform 0.3s ease;
    font-size: 11px;
}

.tools-panel.collapsed-panel + .left-panel-tail {
    left: 0;
}

.tools-panel.collapsed-panel + .left-panel-tail i {
    transform: rotate(180deg);
}

/* Панель свойств */
.properties-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.property-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.property-group label {
    color: var(--text-secondary);
    font-size: 13px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.color-input {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    padding: 6px; /* Увеличиваем отступы */
    border-radius: 6px;
}

.color-input input[type="color"] {
    width: 48px; /* Увеличиваем размер */
    height: 36px; /* Увеличиваем размер */
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
}

.color-input input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-input input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.color-value {
    color: var(--text-secondary);
    font-size: 13px; /* Увеличиваем шрифт */
    font-family: monospace;
}

/* Стили для range input */
.property-group input[type="range"] {
    width: 100%;
    height: 6px; /* Увеличиваем высоту трека */
    background: var(--bg-tertiary);
    border-radius: 3px;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
}

/* WebKit (Chrome, Safari, Edge) */
.property-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px; /* Увеличиваем ползунок */
    height: 20px; /* Увеличиваем ползунок */
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    margin-top: -7px; /* Центрирование относительно трека */
    transition: transform 0.1s;
}

.property-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--accent-hover);
}

.property-group input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
}

/* Firefox */
.property-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

.property-group input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    background: var(--accent-hover);
}

.property-group input[type="range"]::-moz-range-track {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
}

/* Для браузеров на движке Trident (старый Internet Explorer) */
.property-group input[type="range"]::-ms-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.property-group input[type="range"]::-ms-track {
    width: 100%;
    height: 6px;
    background: transparent;
    border-color: transparent;
    color: transparent;
}

.property-group input[type="range"]::-ms-fill-lower {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.property-group input[type="range"]::-ms-fill-upper {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

#stroke-width-value {
    color: var(--accent);
    font-size: 14px;
    font-weight: 500;
}

/* История */
.history-actions {
    display: flex;
    gap: 8px;
}

.history-btn {
    flex: 1;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    height: 42px; /* Увеличиваем высоту */
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 18px; /* Увеличиваем иконки */
    display: flex;
    align-items: center;
    justify-content: center;
}

.history-btn i {
    font-size: 20px;
}

.history-btn:hover {
    background: var(--accent);
}
/* Стили для сворачиваемых секций */
.collapsible {
    margin-bottom: 8px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    cursor: pointer;
    user-select: none;
    border-bottom: 1px solid var(--border-color);
}

.section-header:hover {
    color: var(--accent);
}

.section-header h3 {
    margin: 0;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.toggle-icon {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.section-header.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.section-content {
    padding: 12px 0;
    transition: all 0.3s ease;
}

.section-content.collapsed {
    display: none;
}

/* Подсекции */
.sub-section {
    margin-bottom: 16px;
}

.sub-section h4 {
    color: var(--text-secondary);
    font-size: 11px;
    text-transform: uppercase;
    margin-bottom: 8px;
    opacity: 0.8;
}

/* Сетка для фигур */
.shapes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 8px;
}

.arrow-grid {
    grid-template-columns: repeat(2, 1fr);
}

.shape-btn {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-primary);
    height: 40px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.shape-btn:hover {
    background: #3d3d3d;
    transform: scale(1.05);
}

.shape-btn.active {
    background: var(--accent);
    color: white;
}

.shape-btn i {
    font-size: 18px;
}

.shape-btn img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    filter: brightness(0) invert(1);   /* по умолчанию иконка белая */
}

.shape-btn.active img {
    filter: brightness(0) invert(1);   /* оставляем белой и для активной кнопки */
}

/* Для текстовых символов в кнопках */
.shape-btn:contains('⬪'),
.shape-btn:contains('⬟'),
.shape-btn:contains('⬢') {
    font-size: 24px;
}

/* Настройки текста */
#text-properties {
    margin-top: 16px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.property-separator {
    height: 1px;
    background: var(--border-color);
    margin: 12px 0;
}

.property-select {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.property-select:hover {
    border-color: var(--accent);
}

.property-select:focus,
.property-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.3);
}

.property-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
    transition: all 0.2s;
}

.property-input:hover {
    border-color: var(--accent);
}

.property-input {
    caret-color: #fff;
    text-shadow: none;
    -webkit-text-fill-color: #fff;
}

/* Секция выбора кистей */
#brushTypeSection {
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

#brushTypeSection label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

#brushTypeSection label i {
    font-size: 14px;
}

.brush-select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.brush-select:hover {
    border-color: var(--accent);
    background: #3a3a3a;
}

.brush-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(176, 176, 176, 0.2);
}

/* Превью кистей */
.brush-preview {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.brush-preview-item {
    flex: 1;
    min-width: 50px;
    text-align: center;
    padding: 8px 4px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.brush-preview-item:hover {
    transform: translateY(-2px);
    background: #3a3a3a;
}

.brush-preview-item.active {
    background: var(--accent);
    border-color: var(--accent);
}

.brush-preview-item.active span {
    color: white;
}

.brush-preview-item canvas {
    display: block;
    margin: 0 auto 4px;
    background: white;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.brush-preview-item span {
    font-size: 9px;
    color: var(--text-secondary);
    display: block;
}

.brush-preview-item.active span {
    color: white;
}

.color-picker-group {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    padding: 6px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.color-picker-group input[type="color"] {
    width: 48px;
    height: 36px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
}

.color-picker-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-group input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

/* Сетка пресетов */
.bg-presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.bg-preset {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    padding: 6px 4px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.bg-preset:hover {
    background: #3d3d3d;
    transform: translateY(-1px);
    border-color: var(--text-secondary);
}

.bg-preset.active {
    border-color: var(--accent);
    background: rgba(74, 144, 226, 0.15);
}

.bg-preset.active span {
    color: var(--accent);
}

/* Миниатюры пресетов */
.bg-preview {
    width: 100%;
    height: 32px;
    border-radius: 4px;
    margin-bottom: 6px;
    box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.3);
}

.bg-preset span {
    font-size: 11px;
    text-align: center;
    transition: color 0.2s ease;
}

/* Паттерны для миниатюр сетки и точек */
.bg-preview-grid {
    background: #fff;
    background-image: linear-gradient(#e0e0e0 1px, transparent 1px), linear-gradient(90deg, #e0e0e0 1px, transparent 1px);
    background-size: 8px 8px;
}

.bg-preview-dots {
    background: #fff;
    background-image: radial-gradient(#ccc 1.5px, transparent 1.5px);
    background-size: 8px 8px;
}

.bg-preview-transparent {
    background-image:
        linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    background-color: #fff;
}
/* =========================================
   ЛОГИКА СВОРАЧИВАНИЯ СЕКЦИИ ФОНА
========================================= */

#bgSection .section-header i {
    transition: transform 0.3s ease;
}

/* Если у родителя нет класса active - скрываем контент и поворачиваем стрелку */
#bgSection:not(.active) .section-content {
    display: none;
}

#bgSection:not(.active) .section-header i {
    transform: rotate(-90deg);
}

/* Кнопки стилей текста */
.text-style-buttons,
.text-align-buttons {
    display: flex;
    gap: 8px;
}

.style-btn,
.align-btn {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.style-btn:hover,
.align-btn:hover {
    background: #3d3d3d;
    border-color: var(--accent);
}

.style-btn.active,
.align-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.style-btn i,
.align-btn i {
    font-size: 14px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .shapes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .section-header h3 {
        font-size: 12px;
    }
}