:root {
    --bg-gradient: radial-gradient(circle at 50% -20%, #312152 0%, #151124 50%, #0d0a16 100%);
    --panel-bg: rgba(22, 17, 36, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(168, 85, 247, 0.4);
    --text-main: #ffffff;
    --text-muted: #b4acc9;
    --accent-gradient: linear-gradient(90deg, #ec4899, #a855f7);
    --btn-hover-gradient: linear-gradient(90deg, #f43f5e, #ec4899);
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 1100px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.site-header {
    text-align: center;
    padding-bottom: 24px;
    position: relative;
}

.title {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    text-shadow: 0 0 30px rgba(168, 85, 247, 0.3);
}

.subtitle {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: 600;
    color: #ffffff;
    padding-bottom: 8px;
    position: relative;
}

.subtitle::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 15%;
    width: 70%;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 2px;
    box-shadow: 0 0 12px #ec4899;
}

.workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

@media (max-width: 768px) {
    .workspace {
        grid-template-columns: 1fr;
    }
}

.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: 16px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.drag-zone {
    border: 2px dashed rgba(168, 85, 247, 0.3);
    border-radius: 12px;
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    background: rgba(0, 0, 0, 0.1);
}

.drag-zone:hover, .drag-zone.dragover {
    border-color: #ec4899;
    background-color: rgba(236, 72, 153, 0.04);
    box-shadow: 0 0 15px rgba(236, 72, 153, 0.2);
}

.drag-zone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.upload-icon {
    font-size: 1.6rem;
    color: #ec4899;
    text-shadow: 0 0 10px rgba(236, 72, 153, 0.5);
}

.upload-text {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.badge {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: #ffffff;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}

input[type="range"]:focus {
    outline: none;
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

input[type="range"]::-webkit-slider-thumb {
    height: 18px;
    width: 18px;
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -6px;
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.8);
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.btn-primary {
    font-family: var(--font-stack);
    font-size: 1rem;
    font-weight: 600;
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    padding: 14px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.4);
}

.btn-primary:hover {
    background: var(--btn-hover-gradient);
    box-shadow: 0 4px 20px rgba(236, 72, 153, 0.6);
    transform: translateY(-1px);
}

.display-panel {
    display: flex;
    justify-content: center;
    align-items: center;
}

.canvas-wrapper {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1 / 1;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

canvas {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    background: #0d0a16;
    display: block;
}