:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --border: #334155;
    --success: #22c55e;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 1000px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    margin-bottom: 1rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    background: linear-gradient(to right, var(--accent), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-secondary);
}

/* Upload Section */
.drop-zone {
    background-color: var(--card-bg);
    border: 2px dashed var(--border);
    border-radius: 1rem;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent);
    background-color: rgba(56, 189, 248, 0.05);
}

.drop-zone .icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

/* Controls */
.controls-section {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    display: flex;
    gap: 2rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    border: 1px solid var(--border);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

input[type="number"] {
    background-color: var(--bg-color);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 0.5rem;
    width: 80px;
    font-family: inherit;
}

button {
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem 1.5rem;
    transition: all 0.2s;
}

.primary-btn {
    background-color: var(--accent);
    color: #0f172a;
}

.primary-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.secondary-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.secondary-btn:hover {
    background-color: rgba(56, 189, 248, 0.1);
}

/* Preview */
.preview-section {
    text-align: center;
}

.canvas-container {
    margin-top: 1rem;
    overflow: auto;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

canvas {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Results */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.pieces-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.piece-card {
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.piece-card img {
    max-width: 100%;
    height: auto;
    /* Add a subtle drop shadow to make the piece shape visible */
    filter: drop-shadow(2px 4px 6px black);
}

.piece-card a {
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
}

.piece-card a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .controls-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group {
        justify-content: space-between;
    }
}