:root {
    --bg-color: #0f1115;
    --card-bg: #1a1d24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #007bff;
    --border-color: #333;
    --font-family: 'Inter', sans-serif;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    width: 100%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
}

header h1 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    margin: 0;
}

main {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}

.canvas-wrapper {
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

canvas {
    cursor: crosshair;
    max-width: 100%;
    height: auto;
}

.info-panel {
    width: 100%;
    max-width: 900px;
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.color-preview {
    width: 100%;
    height: 150px;
    border-radius: 8px;
    background-color: #000;
    border: 1px solid var(--border-color);
    transition: background-color 0.1s ease;
}

.data-display {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.data-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

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

.data-group span {
    font-family: monospace;
    font-size: 1rem;
}

.status-message {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    min-height: 1.2em;
}

/* Tooltip */
.tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    pointer-events: none;
    display: none;
    font-family: monospace;
    font-size: 12px;
    z-index: 100;
    white-space: nowrap;
}