:root {
    --snap-yellow: #FFFC00;
    --bg-dark: #0A0A0A;
    --glass: rgba(255, 255, 255, 0.05);
    --border-glass: rgba(255, 255, 255, 0.1);
    --sidebar-width: 320px;
}

body {
    background-color: var(--bg-dark);
    color: #EAEAEA;
    font-family: 'Inter', -apple-system, sans-serif;
    min-height: 100vh;
}

/* Glassmorphism Navigation */
.glass-nav {
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
}

.text-snap { color: var(--snap-yellow); font-weight: 800; }

/* Sidebar Styling */
.sidebar {
    background: #111;
    border-right: 1px solid var(--border-glass);
    height: calc(100vh - 60px);
    overflow-y: auto;
}

.section-title {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    color: #666;
    border-left: 3px solid var(--snap-yellow);
    padding-left: 10px;
    margin-bottom: 20px;
}

/* Upload Zone */
.upload-zone {
    background: var(--glass);
    border: 2px dashed #333;
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.upload-zone:hover {
    border-color: var(--snap-yellow);
    background: rgba(255, 252, 0, 0.03);
}

/* Range Inputs */
.snap-range {
    width: 100%;
    accent-color: var(--snap-yellow);
    margin: 10px 0 20px 0;
}

/* Buttons */
.btn-snap {
    background: var(--snap-yellow);
    color: black;
    font-weight: 700;
    border-radius: 8px;
    border: none;
}

.btn-snap-outline {
    border: 1px solid var(--snap-yellow);
    color: var(--snap-yellow);
}

/* Preview Stage */
.main-stage {
    background: #000;
    display: flex;
    flex-direction: column;
}

.glass-card {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.canvas-container {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

canvas {
    max-width: 100%;
    max-height: 100%;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    transition: transform 0.2s ease;
}

.control-item label {
    font-size: 0.85rem;
    color: #bbb;
}