:root {
    --primary-color: #4a6bff;
    --primary-light: #eef0ff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #e0e0e0;
    --code-bg: #282c34;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.app-header h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.app-header h1 i {
    margin-right: 10px;
}

.app-header p {
    color: var(--secondary-color);
    font-size: 1rem;
}

.app-main {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    flex-grow: 1;
}

.controls-panel {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 20px;
}

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

.control-group h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--dark-color);
}

.form-row {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.form-row label {
    width: 100px;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.form-row input[type="number"],
.form-row select {
    flex-grow: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-row input[type="number"]:focus,
.form-row select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.2);
}

.form-row input[type="range"] {
    flex-grow: 1;
    margin: 0 10px;
}

.form-row input[type="color"] {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    cursor: pointer;
}

.form-row input[type="checkbox"] {
    margin-left: auto;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.form-row span {
    width: 40px;
    text-align: right;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.icon-btn {
    width: 30px;
    height: 30px;
    border: none;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 5px;
    cursor: pointer;
    margin-left: 5px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.preset-btn {
    padding: 8px;
    border: 1px solid var(--border-color);
    background-color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
}

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

.preview-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.preview-container {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid-preview {
    width: 100%;
    height: 100%;
    display: grid;
    gap: 10px;
    background-color: white;
    border: 1px dashed var(--border-color);
    padding: 10px;
}

.grid-cell {
    background-color: var(--primary-light);
    border: 1px solid var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.preview-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.action-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.action-btn:hover {
    background-color: #3a5bef;
    transform: translateY(-2px);
}

.action-btn i {
    font-size: 0.9rem;
}

.code-section {
    grid-column: 1 / -1;
    background-color: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.code-tab {
    padding: 12px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--secondary-color);
    position: relative;
    transition: var(--transition);
}

.code-tab.active {
    color: var(--primary-color);
    font-weight: 500;
}

.code-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.code-container {
    position: relative;
    min-height: 200px;
}

.code-content {
    display: none;
    padding: 20px;
    background-color: var(--code-bg);
    color: #abb2bf;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    overflow-x: auto;
    border-radius: 0 0 10px 10px;
}

.code-content.active {
    display: block;
}

.code-meta {
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--secondary-color);
    background-color: #f8f9fa;
    border-top: 1px solid var(--border-color);
}

.app-footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.app-footer i {
    color: var(--danger-color);
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--success-color);
    color: white;
    padding: 12px 20px;
    border-radius: 5px;
    box-shadow: var(--shadow-md);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
}

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

@media (max-width: 1024px) {
    .app-main {
        grid-template-columns: 1fr;
    }

    .controls-panel {
        position: static;
    }
}

@media (max-width: 768px) {
    .app-header h1 {
        font-size: 1.8rem;
    }

    .presets {
        grid-template-columns: repeat(5, 1fr);
    }

    .form-row {
        flex-wrap: wrap;
    }

    .form-row label {
        width: 100%;
        margin-bottom: 5px;
    }

    .form-row input,
    .form-row select {
        width: 100%;
    }

    .form-row span {
        width: auto;
        margin-left: 10px;
    }

    .preview-actions {
        justify-content: center;
    }
}