/* Inherited from Puzzle Paradise */
:root {
    --bg-light: #f1f5f9; /* slate-100 */
    --text-light: #0f172a; /* slate-900 */
    --card-bg-light: rgba(255, 255, 255, 0.85);

    --bg-dark: #0f172a; /* slate-900 */
    --text-dark: #e2e8f0; /* slate-200 */
    --card-bg-dark: rgba(30, 41, 59, 0.6); /* slate-800 with opacity */
}
html { scroll-behavior: smooth; }

body.light { background-color: var(--bg-light); color: var(--text-light); }
body.dark { background-color: var(--bg-dark); color: var(--text-dark); }

.lobster-font { font-family: 'Lobster', cursive; }
.glass-panel {
    backdrop-filter: blur(12px);
    border: 1px solid;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.light .glass-panel { background-color: var(--card-bg-light); border-color: rgba(0,0,0,0.1); }
.dark .glass-panel { background-color: var(--card-bg-dark); border-color: rgba(255,255,255,0.1); }


/* App-Specific Styles */
html, body {
    height: 100%;
    margin: 0;
    overflow: hidden; /* Prevent scrolling */
}
body {
    font-family: 'Inter', sans-serif;
    display: flex;
    flex-direction: column;
}
#main-container {
    flex: 1; /* Allow container to grow and fill space */
    min-height: 0; /* Important for flex child */
}
.puzzle-piece {
    transition: all 0.2s ease-in-out;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
    border: 1px solid rgba(255,255,255,0.2);
    cursor: pointer;
    border-radius: 6px; 
    position: relative;
}
.puzzle-piece .piece-number {
    position: absolute;
    top: 1px;
    left: 3px;
    font-size: 12px;
    font-weight: bold;
    color: white;
    text-shadow: 0 0 3px black, 0 0 3px black;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    pointer-events: none;
}
body.show-numbers .puzzle-piece .piece-number {
    opacity: 1;
}
.puzzle-piece.empty {
    background-image: none;
    background-color: rgba(0,0,0,0.2);
    cursor: default;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.4);
}
#puzzle-wrapper {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}
#puzzle-area {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    gap: 8px;
}
.grid-label-container {
    display: grid;
}
.grid-label {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
}
.light .grid-label { color: #475569; } /* slate-600 */
.dark .grid-label { color: #94a3b8; } /* slate-400 */

.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    opacity: 1;
    z-index: 1000;
    pointer-events: none;
    animation: fall 4s linear forwards;
}
@keyframes fall {
    to {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}
/* Library Modal Styles */
#library-modal .library-grid-item {
    aspect-ratio: 1/1;
    background-size: cover;
    background-position: center;
}