:root {
    --bg-dark: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --primary: #3b82f6;
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --water-color: rgba(14, 165, 233, 0.2);
    --water-hover: rgba(14, 165, 233, 0.4);
    --ship-color: #475569;
    --hit-color: #ef4444;
    --miss-color: #ffffff;
    
    --cell-size: 30px;
}

body {
    background-color: var(--bg-dark);
    color: white;
    font-family: 'Outfit', sans-serif;
    margin: 0;
    overflow-x: hidden;
}

.game-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
    position: relative;
    z-index: 10;
}

.game-header {
    text-align: center;
}

.game-header h1 {
    font-size: 2.5rem;
    margin: 1rem 0 0 0;
}

.panel {
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    max-width: 400px;
    margin: 2rem auto;
    text-align: center;
}

.btn-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.boards-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.board-section {
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
    flex: 1;
    min-width: 320px;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.board-section h3 {
    margin: 0 0 1rem 0;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1rem;
}

.sea-grid {
    display: grid;
    grid-template-columns: repeat(10, var(--cell-size));
    grid-template-rows: repeat(10, var(--cell-size));
    gap: 2px;
    background-color: #1e293b;
    border: 3px solid #334155;
    border-radius: 4px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.sea-grid.disabled {
    opacity: 0.6;
    pointer-events: none;
}

.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    background-color: var(--water-color);
    transition: background-color 0.2s;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.enemy-cell {
    cursor: crosshair;
}
.enemy-cell:hover {
    background-color: var(--water-hover);
}

.cell.has-ship {
    background-color: var(--ship-color);
    box-shadow: inset 0 0 0 1px #334155;
}

.cell.hit::after {
    content: '💥';
    font-size: 1rem;
    animation: pop 0.3s ease-out;
}

.cell.miss::after {
    content: '・';
    color: var(--miss-color);
    font-size: 2rem;
    line-height: 0;
}

.cell.sunk {
    background-color: rgba(239, 68, 68, 0.3);
}

.cell.hover-valid {
    background-color: rgba(16, 185, 129, 0.5);
}

.cell.hover-invalid {
    background-color: rgba(239, 68, 68, 0.5);
}

@keyframes pop {
    0% { transform: scale(0); }
    50% { transform: scale(1.5); }
    100% { transform: scale(1); }
}

.setup-panel {
    width: 100%;
    margin-top: 1.5rem;
    background: rgba(0,0,0,0.2);
    padding: 1rem;
    border-radius: 8px;
    box-sizing: border-box;
}

.ship-dock {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.dock-ship {
    display: flex;
    gap: 2px;
    padding: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    background: rgba(255,255,255,0.05);
    border-radius: 4px;
}

.dock-ship.selected {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.2);
}

.dock-ship.placed {
    opacity: 0.3;
    cursor: not-allowed;
}

.dock-ship-part {
    width: 15px;
    height: 15px;
    background-color: var(--ship-color);
    border-radius: 2px;
}

.fleet-status {
    width: 100%;
    margin-top: 1.5rem;
    text-align: center;
    font-size: 1.1rem;
    color: #e2e8f0;
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    :root {
        --cell-size: calc(85vw / 10);
    }
    .boards-wrapper {
        flex-direction: column;
        align-items: center;
    }
}