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

:root {
    --primary-color: #5E72E4;
    --primary-hover: #4C63D2;
    --secondary-color: #F5365C;
    --success-color: #2DCE89;
    --warning-color: #FB6340;
    --dark-bg: #172B4D;
    --light-bg: #F7F8FC;
    --card-bg: #FFFFFF;
    --text-primary: #32325D;
    --text-secondary: #8898AA;
    --border-color: #E9ECEF;
    --shadow-sm: 0 0 .5rem rgba(0,0,0,.075);
    --shadow-md: 0 .25rem .75rem rgba(0,0,0,.05);
    --shadow-lg: 0 0 2rem 0 rgba(136,152,170,.15);
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.language-selector select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: white;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-selector select:hover {
    border-color: var(--primary-color);
}

.tool-container {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.control-panel {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.control-panel::-webkit-scrollbar {
    width: 8px;
}

.control-panel::-webkit-scrollbar-track {
    background: var(--light-bg);
    border-radius: 4px;
}

.control-panel::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.shape-selector h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.shape-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.shape-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.shape-btn svg {
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
}

.shape-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.shape-btn.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.shape-btn.active svg {
    color: white;
}

.controls {
    margin-bottom: 2rem;
}

.controls.hidden {
    display: none;
}

.controls h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.control-group label {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.control-group input[type="range"] {
    flex: 2;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 8px rgba(94, 114, 228, 0.1);
}

.control-group span {
    min-width: 50px;
    text-align: right;
    font-weight: 600;
    color: var(--primary-color);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.4s;
    border-radius: 26px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

#animation-speed-group {
    display: none;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.preset-btn {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: white;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.preset-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.preview-panel {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.preview-container {
    position: relative;
    margin-bottom: 2rem;
}

.preview-box {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0),
                linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.preview-image {
    width: 80%;
    height: 80%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: clip-path 0.3s ease;
}

.interactive-editor {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    pointer-events: all;
}

.editor-svg {
    width: 100%;
    height: 100%;
}

.code-output, .example-usage {
    margin-bottom: 1.5rem;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.code-header h3, .example-usage h3 {
    font-size: 1rem;
    color: var(--text-primary);
}

.copy-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.copy-btn.copied {
    background: var(--success-color);
}

.code-block {
    background: var(--dark-bg);
    color: #E9ECEF;
    padding: 1rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.code-block code {
    display: block;
}

footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
}

@media (max-width: 1024px) {
    .tool-container {
        grid-template-columns: 1fr;
    }
    
    .control-panel {
        max-height: none;
    }
}

@media (max-width: 640px) {
    header h1 {
        font-size: 1.25rem;
    }
    
    .shape-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .preset-buttons {
        grid-template-columns: 1fr;
    }
    
    .control-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group label {
        margin-bottom: 0.25rem;
    }
}