:root {
    --water-blue: #a5cfeb;
    --water-hover: #a9d0f5;
    --setup-taken: #31c745; 
    --grid-bg: #2c3e50;
    --grid-border: #2c3e50;
}

.game-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.board-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.battleship-grid {
    display: grid;
    grid-template-columns: repeat(var(--board-size, 10), 1fr); 
    grid-template-rows: repeat(var(--board-size, 10), 1fr);
    width: 350px;
    height: 350px;
    background-color: var(--grid-bg);
    border: 4px solid var(--grid-border);
    gap: 1px;
}

/* TILE CONTAINER */
.tile {
    position: relative;
    background-color: var(--water-blue);
    cursor: pointer;
    transition: background-color 0.2s;
}

.tile:hover {
    background-color: var(--water-hover); 
}

/* --- SETUP PHASE --- */
.tile.taken {
    background-color: var(--setup-taken); 
    box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
}

.tile.ship-part {
    z-index: 5;
}

.tile.ship-part::before {
    content: '';
    position: absolute;
    top: -1px; 
    left: -1px;
    width: calc(100% + 2px); 
    height: calc(100% + 2px);
    
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    z-index: 6;
}

.tile.part-small::before       { background-image: url('images/small_ship.png'); }
.tile.bow-front::before        { background-image: url('images/ship_bow_front.png'); }
.tile.bow-back::before         { background-image: url('images/ship_bow_back.png'); }
.tile.part-straight::before    { background-image: url('images/straight_connector.png'); }
.tile.part-corner::before      { background-image: url('images/corner_connector.png'); }
.tile.part-corner.full::before { background-image: url('images/corner_connector_full.png'); }
.tile.part-t-junction::before  { background-image: url('images/t_junction.png'); }
.tile.part-t-junction.full::before        { background-image: url('images/t_junction_full.png'); }
.tile.part-t-junction.full-flip::before   { background-image: url('images/t_junction_full_flip.png'); }
.tile.part-t-junction.double-full::before { background-image: url('images/t_junction_double_full.png'); }
.tile.part-central::before     { background-image: url('images/central_connector.png'); }
.tile.part-central.full::before      { background-image: url('images/central_connector_full.png'); }
.tile.part-central.full-half::before { background-image: url('images/central_connector_full_half.png'); }

/* --- ROTATION LOGIC -- */

/* Straights */
.tile.part-straight.con-E::before, 
.tile.part-straight.con-W::before { transform: rotate(90deg); }

/* Bows */
.tile.part-bow.con-S::before { transform: rotate(0deg); }
.tile.part-bow.con-N::before { transform: rotate(180deg); }
.tile.part-bow.con-E::before { transform: rotate(270deg); }
.tile.part-bow.con-W::before { transform: rotate(90deg); }

/* Corners */
.tile.part-corner.con-S.con-E::before { transform: rotate(0deg); }
.tile.part-corner.con-S.con-W::before { transform: rotate(90deg); }
.tile.part-corner.con-N.con-W::before { transform: rotate(180deg); }
.tile.part-corner.con-N.con-E::before { transform: rotate(270deg); }

/* T-Junctions */
.tile.part-t-junction.face-S::before { transform: rotate(0deg); }
.tile.part-t-junction.face-W::before { transform: rotate(90deg); }
.tile.part-t-junction.face-N::before { transform: rotate(180deg); }
.tile.part-t-junction.face-E::before { transform: rotate(270deg); }

/* Small Boats */

.tile.part-small.face-N::before { transform: rotate(0deg); }
.tile.part-small.face-S::before { transform: rotate(180deg); }
.tile.part-small.face-E::before { transform: rotate(90deg); }
.tile.part-small.face-W::before { transform: rotate(270deg); }

/* Quarter Central Connector */
.tile.part-central.full-missing-corner::before { 
    background-image: url('images/central_connector_missing_corner.png'); 
}

/* Missing Corner Rotations */
.tile.part-central.full-missing-corner.empty-NE::before { transform: rotate(0deg); }
.tile.part-central.full-missing-corner.empty-SE::before { transform: rotate(90deg); }
.tile.part-central.full-missing-corner.empty-SW::before { transform: rotate(180deg); }
.tile.part-central.full-missing-corner.empty-NW::before { transform: rotate(270deg); }

/* Opposite Corners Central Connector */
.tile.part-central.full-opposite::before { 
    background-image: url('images/central_connector_half_full.png'); 
}

.tile.part-central.full-opposite.diag-backslash::before { transform: rotate(0deg); }

.tile.part-central.full-opposite.diag-slash::before { transform: rotate(90deg); }

/* --- COMBAT LAYERS --- */

.tile.hit.dead-debris::before {
    content: '';
    position: absolute;
    top: -1px; 
    left: -1px;
    width: calc(100% + 2px); 
    height: calc(100% + 2px);
    
    background-image: url('images/debris.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    
    z-index: 5;
    opacity: 1 !important;
}

.tile.hit.dead-part::before {
    content: '';
    position: absolute;
    top: -1px; 
    left: -1px;
    width: calc(100% + 2px); 
    height: calc(100% + 2px);
    
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    
    z-index: 5;
    opacity: 1 !important;
    
    filter: brightness(0.4);
}

.tile.hit::after,
.tile.miss::after {
    content: '';
    position: absolute;
    top: -1px; 
    left: -1px;
    width: calc(100% + 2px); 
    height: calc(100% + 2px);
    
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    
    z-index: 10;
    pointer-events: none; 
}

.tile.hit::after {
    background-image: var(--hit-gif, url('images/damage.gif'));
}

.tile.miss::after {
    background-image: url('images/miss.png');
    animation: flash 0.2s;
}

.tile.sunk::before {
    filter: brightness(0.6) grayscale(80%);
}

@media (max-width: 800px) {
    .battleship-grid {
        width: 85vw;  
        height: 85vw;
    }
}

@keyframes flash {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Central Connector Full-Half Rotations */

.tile.part-central.full-half.face-N::before { 
    transform: rotate(180deg); 
}

.tile.part-central.full-half.face-S::before { 
    transform: rotate(0deg); 
}

.tile.part-central.full-half.face-E::before { 
    transform: rotate(270deg); 
}

.tile.part-central.full-half.face-W::before { 
    transform: rotate(90deg); 
}

/* Quarter Central Connector */
.tile.part-central.full-one-corner::before { 
    background-image: url('images/central_connector_corner.png'); 
}

.tile.part-central.full-one-corner.filled-SE::before { transform: rotate(0deg); }
.tile.part-central.full-one-corner.filled-SW::before { transform: rotate(90deg); }
.tile.part-central.full-one-corner.filled-NW::before { transform: rotate(180deg); }
.tile.part-central.full-one-corner.filled-NE::before { transform: rotate(270deg); }

/* Buttons */

.controls-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 2.5rem;
    margin-bottom: 2rem;
    width: 100%;
}

button {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 1rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    
    background-color: #ffffff;
    color: #2c3e50; 
    border: 2px solid #2c3e50;
    border-radius: 8px; 
    
    padding: 12px 24px;
    width: 160px; 
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, transform 0.1s;
}

button:hover {
    background-color: #2c3e50;
    color: #ffffff;
}

button:active {
    transform: scale(0.98);
}

button:disabled {
    border-color: #95a5a6;
    color: #95a5a6;
    cursor: not-allowed;
}
button:disabled:hover {
    background-color: #ffffff;
    color: #95a5a6;
}

/* --- FOG OF WAR --- */

#computer-board .tile.ship-part::before {
    opacity: 0;
    transition: opacity 0.4s ease-in-out; 
}

#computer-board .tile.ship-part.sunk::before {
    opacity: 1;
}

/* --- FACE LAYER --- */
.face-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: 80%;
    background-repeat: no-repeat;
    background-position: center;
    z-index: 7;
    pointer-events: none;
    transition: opacity 0.2s, background-image 0.2s;
    opacity: 0;
}

/* Face States */
.face-layer.face-smile {
    background-image: url('images/smile.png');
}

.face-layer.face-frown {
    background-image: url('images/frown.png');
}

.face-layer.face-dead {
    background-image: url('images/dead_face.png'); 
}

#computer-board .face-layer.face-dead {
    opacity: 1;
}

#player-board .face-layer.face-smile,
#player-board .face-layer.face-frown,
#player-board .face-layer.face-dead {
    opacity: 1;
}

/* --- SETTINGS CONTROLS --- */
.settings-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.setting-group label {
    font-weight: bold;
    color: #2c3e50;
    font-size: 0.9rem;
}

.setting-group select {
    padding: 8px 12px;
    border: 2px solid #2c3e50;
    border-radius: 6px;
    background-color: white;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    outline: none;
}

.setting-group select:hover {
    background-color: #f0f8ff;
}

/* --- LAYOUT WRAPPER --- */
.game-layout-wrapper {
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Aligns items to top */
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* --- OPTIONS SIDEBAR --- */
.options-card {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 200px;
    flex-shrink: 0;
    text-align: center;
    margin-top: 2rem;
    margin-left: 6rem;
}

.settings-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1rem;
}

@media (max-width: 1000px) {
    .game-layout-wrapper {
        flex-direction: column;
        align-items: center;
    }
    
    .options-card {
        width: 90%;
        max-width: 600px;
    }
    
    .settings-container {
        flex-direction: row;
        justify-content: center;
    }
}