:root {
    --primary-color: #4CAF50;
    --primary-hover-color: #45a049;
    --secondary-color: #2196F3;
    --secondary-hover-color: #1976D2;
    --danger-color: #f44336;
    --danger-hover-color: #d32f2f;
    --light-gray-color: #f0f2f5;
    --medium-gray-color: #ddd;
    --dark-gray-color: #333;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    background-color: var(--light-gray-color);
    color: var(--dark-gray-color);
}

.container {
    display: grid;
    grid-template-columns: 320px 1fr;
    grid-template-rows: auto 1fr;
    gap: 20px;
    padding: 20px;
    max-width: 1600px;
    margin: 0 auto;
    min-height: 100vh;
}

.controls {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.control-section {
    margin-bottom: 25px;
}

.control-section h3 {
    font-size: 16px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--medium-gray-color);
    padding-bottom: 10px;
}

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

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

select,
input[type="text"],
input[type="number"],
input[type="color"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--medium-gray-color);
    border-radius: 4px;
    transition: border-color 0.3s;
}

input[type="color"] {
    padding: 4px;
}

select:focus,
input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.button {
    width: 100%;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
    font-size: 15px;
    margin-top: 5px;
}

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

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

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

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

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


#fileInput {
    display: none;
}

.thumbnails-container {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    min-height: 170px;
    align-content: flex-start;
}

.thumbnail {
    position: relative;
    width: 120px;
    height: 120px;
    border: 2px solid transparent;
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.thumbnail.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 12px rgba(76, 175, 80, 0.4);
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: #f9f9f9;
}

.thumbnail .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(244, 67, 54, 0.8);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s;
}

.thumbnail:hover .remove-btn {
    opacity: 1;
}

.canvas-container {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: auto;
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.preset-btn {
    background-color: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.preset-btn:hover {
    background-color: #e0e0e0;
    border-color: #ccc;
}

.preset-btn.active {
    background-color: var(--secondary-color);
    color: white;
    border-color: var(--secondary-hover-color);
}

canvas {
    max-width: 100%;
    max-height: 100%;
    height: auto;
}