:root {
    --bg-dark: #121212;
    --bg-panel: #1e1e1e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent: #4f87ff;
    --accent-hover: #3a6ecc;
    --border: #333;
    --input-bg: #2a2a2a;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 320px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px;
    overflow-y: auto;
    flex-shrink: 0;
}

.sidebar .header {
    display: flex;
    flex-direction: column;
}

.header-logo {
    align-self: flex-start;
    width: 60px;
    height: 60px;
    margin-bottom: 10px;
    filter: brightness(0) invert(1);
}

.sidebar h1 {
    font-size: 1.2rem;
    font-weight: 300;
    color: #fff;
    margin-bottom: 5px;
}

.sidebar .header p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 25px;
}

.control-group {
    margin-bottom: 20px;
}

.control-group label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.control-group label span {
    color: var(--text-primary);
    font-family: monospace;
}

input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
}

.select-wrapper {
    position: relative;
}

select {
    width: 100%;
    background-color: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 8px 12px;
    border-radius: 6px;
    appearance: none;
    font-size: 0.9rem;
    cursor: pointer;
}

/* Custom arrow for select */
.select-wrapper::after {
    content: '▼';
    font-size: 0.7rem;
    color: var(--text-secondary);
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.seed-control {
    display: flex;
    gap: 8px;
}

input[type="number"] {
    flex: 1;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px;
    border-radius: 6px;
}

#randomSeedBtn {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: 0 10px;
    font-size: 1.2rem;
    color: var(--text-primary);
    transition: background 0.2s;
}

#randomSeedBtn:hover {
    background: var(--border);
}

.radio-group {
    display: flex;
    gap: 15px;
    margin-top: 5px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    color: var(--text-primary);
}

.actions {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.secondary-btn {
    width: 100%;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 10px 12px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    margin-bottom: 10px;
}

.secondary-btn:hover {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.18);
}

.primary-btn {
    width: 100%;
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

/* Main Preview Area */
.preview-area {
    flex: 1;
    background-color: #0a0a0a;
    /* Very dark, almost black for contrast */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 40px;
    background-image: radial-gradient(#1a1a1a 1px, transparent 1px);
    background-size: 20px 20px;
}

.canvas-container {
    background-color: white;
    /* We want to show the 17mm x 12mm SVG but scaled up huge */
    /* 17mm is approx 64px at 96dpi. We want it to fill a good chunk of screen */
    /* Let's use a dynamic width/height driven by JS or just high scale */
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    /* Ensure it behaves like a physical sheet of paper */
}

/* This targets the SVG element itself */
/* Grid Layout for Multiple Previews */
.previews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 15px;
    width: 100%;
    height: 100%;
    overflow-y: auto;
    padding: 10px;
    align-content: flex-start;
}

.preview-item {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    border-radius: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5px;
    transition: transform 0.2s, z-index 0.2s;
    cursor: pointer;
    position: relative;
    aspect-ratio: 17/12;
}

.preview-item:hover {
    transform: scale(1.5);
    z-index: 100;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
    outline: 2px solid var(--accent);
}

.preview-item svg {
    display: block;
    width: 100%;
    height: 100%;
    background-color: white;
    image-rendering: pixelated;
}

.preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    opacity: 1;
    /* Adjust needed */
}

.info-bar {
    position: absolute;
    bottom: 20px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 5px 10px;
    border-radius: 20px;
}