/* Base styling */
body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background: #f2f4f7;
}

/* Canvas for subtle floating flowers */
#background-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: -1;
}

/* Main container */
.container {
    max-width: 900px;
    width: 90%;
    padding: 30px;
    margin: 40px auto;
    background: rgba(255,255,255,0.95);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-radius: 20px;
    text-align: center;
}

/* Headings */
h1 {
    font-weight: 700;
    color: #333;
    margin-bottom: 20px;
}

/* Cards for controls, grid, solution */
.card {
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 15px;
    background: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

/* Grid size input */
.grid-size-selector input {
    width: 60px;
    padding: 5px;
    margin-left: 10px;
    font-size: 16px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

/* Controls layout */
.controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Color buttons */
#color-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.color-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    box-shadow: 0 3px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.color-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 12px rgba(0,0,0,0.2);
}

/* Color mapping */
.color-btn.red { background: #e74c3c; }
.color-btn.blue { background: #3498db; }
.color-btn.green { background: #2ecc71; }
.color-btn.yellow { background: #f1c40f; }
.color-btn.purple { background: #9b59b6; }
.color-btn.orange { background: #e67e22; }
.color-btn.teal { background: #1abc9c; }
.color-btn.grey { background: #7f8c8d; }
.color-btn.pink { background: #ff6b81; }
.color-btn.grass { background: #a8e6cf; font-size: 18px; }
.color-btn.empty { background: #ecf0f1; }

/* Action buttons */
.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.action-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.action-btn:hover {
    background: #2980b9;
    transform: scale(1.05);
}

/* Grid container */
#grid-container {
    display: grid;
    grid-template-columns: repeat(var(--grid-size), 50px);
    gap: 0px; 
    width: max-content;
    margin: 20px auto;
    border-radius: 15px;
    position: relative;
    overflow: hidden;
}

/* Tiles (white background + subtle outline) */
.tile {
    width: 50px;
    height: 50px;
    border: 1px solid rgba(0,0,0,0.15);
    background-color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
    transition: transform 0.2s, background-color 0.2s;
}

.tile:hover {
    transform: scale(1.05);
}

/* Flower elements */
.flower {
    pointer-events: none;
    width: 10px;
    height: 10px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 0 2px #fff;
    position: absolute;
    animation: floatFlower 5s infinite alternate;
    opacity: 0.3;
}

@keyframes floatFlower {
    0% { transform: translateY(0); }
    100% { transform: translateY(-5px); }
}

/* Solution panel */
#solution-panel h2 {
    font-weight: 500;
    color: #555;
    margin-bottom: 10px;
}

#solution-display {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    justify-content: center;
    font-size: 24px;
}

/* Responsive */
@media (max-width: 600px) {
    .container { padding: 20px; }
    .tile { width: 40px; height: 40px; font-size: 16px; }
    .action-btn { padding: 8px 16px; font-size: 14px; }
}