:root {
    --bg-color: #0f0f13;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --accent-color: #7c4dff;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --font-family: 'Outfit', sans-serif;
    --transition-speed: 0.3s;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    /* Prevent body scroll if canvas gets big, handle locally */
}

/* Background Gradients */
body::before,
body::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.4;
    animation: flow 10s ease-in-out infinite alternate;
}

body::before {
    background: radial-gradient(circle, #7c4dff, transparent 70%);
    top: -100px;
    left: -100px;
}

body::after {
    background: radial-gradient(circle, #00e5ff, transparent 70%);
    bottom: -100px;
    right: -100px;
    animation-delay: -5s;
}

@keyframes flow {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(30px, 50px);
    }
}

.app-container {
    width: 90%;
    max-width: 1200px;
    height: 90vh;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

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

header h1 {
    font-size: 3rem;
    font-weight: 600;
    background: linear-gradient(to right, #fff, #a1a1aa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

main {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
    min-height: 0;
    /* Important for scroll */
}

/* Canvas Area */
.canvas-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: border-color var(--transition-speed);
}

.canvas-container.drag-over {
    border-color: var(--accent-color);
    background: rgba(124, 77, 255, 0.1);
}

canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: crosshair;
    display: none;
    /* Hidden until loaded */
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2rem;
    border-radius: 16px;
    transition: transform 0.2s, color 0.2s;
}

.upload-placeholder:hover {
    transform: translateY(-2px);
    color: var(--text-primary);
}

.upload-placeholder svg {
    opacity: 0.7;
}

/* Color Panel */
.color-panel {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    backdrop-filter: blur(10px);
}

.color-preview {
    width: 100%;
    height: 150px;
    background-color: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: background-color 0.1s;
    border: 1px solid var(--card-border);
}

.color-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.color-value-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
}

.color-value-group label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.color-value-group .value {
    font-family: monospace;
    font-size: 1.2rem;
    color: var(--text-primary);
    padding: 0.8rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    border: 1px solid transparent;
    /* Placeholder for active state */
}

.copy-btn {
    position: absolute;
    right: 10px;
    top: 32px;
    background: transparent;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.2s;
}

.color-value-group:hover .copy-btn {
    opacity: 1;
}

/* Logic for when no image is uploaded yet */
body.empty-state .color-panel {
    opacity: 0.5;
    pointer-events: none;
}

/* Responsive */
@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto;
    }

    .app-container {
        height: auto;
        min-height: 100vh;
        padding: 2rem 0;
    }

    .canvas-container {
        min-height: 400px;
    }
}