* {
    box-sizing: border-box;
}

:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --accent: #38bdf8;
    --text: #f8fafc;
    --miss: #94a3b8;
    --hit: #f97316;
    --sunk: #ef4444;
    --ship: #3b82f6;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text);
    display: flex;
    justify-content: center;
    padding: 20px;
}

.container {
    max-width: 1100px;
    width: 100%;
    text-align: center;
}

h1 {
    margin-top: 0;
    margin-bottom: 16px;
}

.card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.hidden { display: none !important; }

.menu-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 20px;
}

.btn {
    padding: 14px 28px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
}

.btn:hover { opacity: 0.9; transform: translateY(-2px); }
.btn.primary { background-color: var(--accent); color: #000; }
.btn.success { background-color: #22c55e; color: #fff; }
.btn.secondary { background-color: #64748b; color: #fff; }

.join-box {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 16px;
}

input {
    padding: 12px 18px;
    border-radius: 8px;
    border: 1px solid #475569;
    background: #0f172a;
    color: #fff;
    font-size: 18px;
}

.game-boards {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

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

.board-container h3 {
    font-size: 20px;
    margin: 8px 0;
}

.grid {
    display: grid;
    width: fit-content;
    grid-template-columns: repeat(10, 44px);
    grid-template-rows: repeat(10, 44px);
    gap: 3px;
    background-color: #334155;
    padding: 6px;
    border-radius: 8px;
}

.cell {
    width: 44px;
    height: 44px;
    background-color: #1e293b;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.cell.ship { background-color: var(--ship); }
.cell.miss { background-color: #334155; }
.cell.miss::after { content: "•"; color: var(--miss); font-size: 32px; }
.cell.hit { background-color: var(--hit); }
.cell.sunk { background-color: var(--sunk); }

.grid.disabled { pointer-events: none; opacity: 0.7; }

.status-bar { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 16px; 
    padding: 8px 12px;
    background-color: var(--bg-color);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #1e293b;
}

.badge { 
    padding: 10px 20px; 
    background: #334155; 
    border-radius: 20px; 
    font-weight: bold; 
    font-size: 18px; 
}

.room-box {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
}

.btn-copy {
    background: #334155;
    border: none;
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}

.btn-copy:hover {
    background: #475569;
}

.controls {
    margin-top: 16px;
    display: flex;
    gap: 10px;
}

.restart-box {
    margin-top: 28px;
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* ==========================================
   Адаптация для мобильных устройств
   ========================================== */
@media (max-width: 768px) {
    body {
        padding: 6px;
    }

    h1 {
        font-size: 20px;
        margin-bottom: 8px;
    }

    .card {
        padding: 16px;
    }

    .menu-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .join-box {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        padding: 12px;
        font-size: 16px;
    }

    input {
        width: 100%;
        font-size: 16px;
        text-align: center;
    }

    /* Плавающий статус-бар сверху */
    .status-bar {
        position: sticky;
        top: 0;
        z-index: 1000;
        background-color: #0f172a;
        padding: 8px 6px;
        margin-bottom: 10px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.5);
        border-radius: 0 0 10px 10px;
    }

    .badge {
        padding: 6px 12px;
        font-size: 14px;
    }

    .room-box {
        font-size: 14px;
        gap: 6px;
    }

    .btn-copy {
        padding: 4px 8px;
        font-size: 13px;
    }

    .game-boards {
        gap: 14px;
        margin-top: 6px;
    }

    .board-container h3 {
        font-size: 15px;
        margin: 4px 0;
    }

    /* Компактный размер клеток 27px - оба поля помещаются без вертикального скролла */
    .grid {
        grid-template-columns: repeat(10, 27px);
        grid-template-rows: repeat(10, 27px);
        gap: 2px;
        padding: 4px;
    }

    .cell {
        width: 27px;
        height: 27px;
        font-size: 12px;
    }

    .cell.miss::after {
        font-size: 20px;
    }

    .controls {
        margin-top: 10px;
        flex-direction: row;
        width: 100%;
        justify-content: center;
    }

    .controls .btn {
        padding: 8px 12px;
        font-size: 14px;
        width: auto;
    }

    .restart-box {
        margin-top: 16px;
        flex-direction: column;
        gap: 10px;
    }
}