:root {
    --tile-size: 0; /* JS will set this */
    --target-tile-size: 0;
}

body {
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #e0e0e0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    display: grid;
    place-items: center; /* Centers the game-container */
}

/* --- Main Layout: The Two Squares --- */

#game-container {
    width: 80vw; /* Overall game view 80% of viewport width */
    height: 80vh; /* Overall game view 80% of viewport height */
    display: grid;
    gap: 1vmin; /* Space between the two squares */
    padding: 1vmin; /* Padding around the entire game area */
    box-sizing: border-box;

    /* Mobile First: 2 rows, 1 column */
    grid-template-rows: 1fr 1fr;
    grid-template-columns: 1fr;
}

/* Desktop/Landscape: 1 row, 2 columns */
@media (orientation: landscape) {
    #game-container {
        grid-template-rows: 1fr;
        grid-template-columns: 1fr 1fr;
    }
#info-area-wrapper {
justify-content: center;
}
}

#play-area-wrapper, #info-area-wrapper {
    width: 100%; /* Fill grid cell */
    height: 100%; /* Fill grid cell */
    display: grid;
    place-items: center; /* Centers the content of the square */
}

/* --- Content of the Squares --- */

#board-container {
    width: 75%; /* 75% of its parent wrapper */
    aspect-ratio: 1 / 1; /* Makes it a perfect square */
    display: grid;
    border: 2px solid #333;
    touch-action: none;
}

#info-area-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 15px;
}

#header {
    width: 75%; /* Relative to info-area-wrapper */
    display: flex;
    justify-content: space-between;
    font-size: clamp(1rem, 3vmin, 1.5rem);
}

#info-area-content {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10%;
}

#target-container { text-align: center; }

#target-grid {
    width: 40%; /* 40% of its parent (info-area-content) */
    aspect-ratio: 1 / 1;
    display: grid;
    border: 1px solid #333;
}

#controls {
    display: flex;
    flex-direction: column; /* Stack buttons */
    gap: 15px;
}

/* --- Tiles & Generics --- */

.tile, .target-tile {
    border: 1px solid #333;
    box-sizing: border-box;
    display: grid;
    place-items: center;
    background-color: #444;
}

.tile { width: var(--tile-size); height: var(--tile-size); cursor: grab; position: relative; }
.target-tile { width: var(--target-tile-size); height: var(--target-tile-size); }

#controls button { padding: 12px; font-size: clamp(0.8rem, 2.5vmin, 1rem); cursor: pointer; border: none; border-radius: 8px; color: white; }
#hint-button { background-color: #007bff; }
#help-button { background-color: #6c757d; }
#restart-button { background-color: #ffc107; color: #333; }
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.8); display: flex; justify-content: center; align-items: center; z-index: 100; padding: 20px; box-sizing: border-box; }
.modal.hidden { display: none; }
.modal-content { background-color: #2a2a2a; padding: clamp(20px, 5vw, 40px); border-radius: 10px; text-align: center; width: 100%; max-width: 500px; max-height: 90vh; overflow-y: auto; }
#help-modal .modal-content { text-align: left; }
#restart-modal .modal-content button { display: block; width: 80%; margin: 10px auto; padding: 10px; font-size: 1.1em; border-radius: 5px; border: none; cursor: pointer; }
#restart-level-button { background-color: #28a745; color: white; }
#restart-full-game-button { background-color: #dc3545; color: white; }
#cancel-restart-button { background-color: #6c757d; color: white; }
.tile-example { display: inline-block; width: 20px; height: 20px; border: 1px solid #333; vertical-align: middle; margin-right: 10px; }
#next-level-button, #close-help-button { padding: 12px 24px; font-size: 1em; cursor: pointer; border: none; border-radius: 8px; color: white; margin-top: 10px; }
#next-level-button { background-color: #28a745; }
#close-help-button { background-color: #6c757d; }
.hint-highlight { box-shadow: 0 0 20px #007bff, inset 0 0 20px #007bff; }
.hint-arrow { position: absolute; font-size: 1.5em; color: #007bff; animation: pulse 1s infinite; pointer-events: none; }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.2); } 100% { transform: scale(1); } }
.locked-tile::after { content: '\1F512'; font-size: 50%; }
.wildcard-tile { background: repeating-linear-gradient(45deg, #606dbc, #606dbc 10px, #465298 10px, #465298 20px); }